EP1070781A1 - Increase of wet lubricity of textile materials and wet lubricant - Google Patents

Abstract

Use of (P>S<) water-dispersible or -colloidally soluble, end-capped polyesters optionally in the form of an aqueous composition (W), as wet-acting lubricants in the treatment of textile piece goods with a textile treatment agent (T) from aqueous liquor under conditions which would otherwise in the textile substrate favour the formation of transport folds and/or the occurrence of friction in or on the substrate, particularly as wet-acting lubricants in the dyeing of polyester in the jet, the corresponding wet-acting lubricants, and their production and preparations thereof.

Description

In the treatment of textile material in the form of textile piece goods, especially in strand or Tube shape, essentially during pretreatment, dyeing, optical brightening or aftertreatment, in aqueous liquor under such conditions that run wrinkles can occur in the textile substrate or rubbing from the substrate may take place against adjacent substrate or apparatus parts unwanted phenomena the marking of the creases and the formation and marking of Chafing, which then as appropriate unequalities the goods and possibly also affect the physical properties of the treated product and consequently of the finished product. In order to counteract these disturbing phenomena, in the corresponding process stages Wet lubricant used, the tendency to form or stabilization and consequently marking reduce wrinkles, especially creases, and reduce the friction substrate / substrate and substrate / metal and consequently reduce the tendency for scars to form and mark. It was already proposed various types of wax dispersions as anti-wrinkle agents (Lubricant) use. With the constant advancement of the procedures and machines, with which The aim of the increase in performance and the environmentally friendly procedure are machines and processes Designed for higher speeds or higher performance and / or at work shorter fleet conditions. As a result, the lubricants used are higher Requirements made. For example, they must be resistant to particularly high shear forces be as effective as possible in short fleets. The shorter the fleet, the greater must be the effectiveness of the respective treatment, since the wet sliding of the goods and the achievement of a smooth, even image without damage to the goods all the more difficult is, the greater the proportion of fleet that is taken up by the goods.

It has now been found that certain polyesters of a certain hydrophilicity, as sufficient, in order that the polyester be dispersible or soluble in water, in particular self-dispersible or is colloidally soluble, especially as they are used as Schmutzlösemittcl, surprisingly advantageous as a wet lubricant in the treatment of textile material in the form of textile piece goods, especially polyester fibers, in jet dyeing machines, e.g. the coloring is not hinder or interfere, but on the wet substrate surprisingly good and extreme superficially act as a wet lubricant.

The invention relates to the use of such polyesters as defined below as Naßgleitmittel for Treatment of textile material in the form of textile piece goods, the corresponding Naßgleitmittel and their preparation and preparations thereof.

A first subject of the invention is thus the use of
(P _S ) water-dispersible or soluble polyesters
as a wet lubricant when treating textile piece goods with a textile treatment agent (T) from aqueous liquor under such conditions, which would otherwise favor the formation of creases and / or the occurrence of friction in or on the substrate in the textile substrate.

-CO-NH-, -NH-CO-O-, -NH-CO-NH- oder -SO₂-.As polyester (P _S ) known polyesters can be used or even those which can be prepared analogously to known polyesters. For the preparation of the polyesters (P _S ) are advantageously used those starting materials which are suitable for forming linear polyester chains, in particular difunctional compounds (D), and optionally monofunctional compounds (E) which are suitable for the end closure of the polyester, and / or higher oligofunctional compounds (H) which are suitable for branching the polyester. The inventively employed polyester (P _S) are water dispersible (preferably self-dispersible) or soluble (preferably colloidally soluble) and included in the respective molecule at least one hydrophilic component and at least one hydrophobic component, so that the resulting polyester has an appropriate hydrophilicity in water is dispersible or soluble, in particular self-dispersible or at most colloidally soluble. The mono-, di- and higher oligofunctional compounds are essentially carboxylic acids or suitable functional derivatives thereof, especially esters of low molecular weight alcohols which can be eliminated by transesterification, especially esters of C _1-4 -alcohols, for example ethyl esters or preferably methyl esters, or anhydrides, on the one hand, and to hydroxy compounds, in particular alcohols, on the other hand, which lead to corresponding carboxylic acid ester groups by esterification or transesterification, or else to lactones of hydroxycarboxylic acids, and may optionally contain one or more heteroatomic bridge members, for example -O-, -CO- , -CO-O-,

-CO-NH-, -NH-CO-O-, -NH-CO-NH- or -SO ₂ -.

(A) aliphatische oder araliphatische Diole, insbesondere

(A₁) aliphatische und araliphatische Diole die sonst keine hydrophilen Komponenten oder Substituenten enthalten, insbesondere Alkandiole mit 2 bis 10 Kohlenstoffatomen, wobei der Alkanrest linear oder, wenn er 3 bis 10 Kohlenstoffatome enthält, auch verzweigt sein kann, oder, wenn er 4 bis 10 Kohlenstoffatome enthält, auch zyklisch sein kann, Di-(C_1-2-hydroxyalkyl)-benzole, wasserunlösliche Polyätherdiole, Polyesterdiole, Polycarbonatdiole, Polyurethandiole und Polyesterurethandiole,

und (A₂) aliphatische oder araliphatische Diole, die mindestens eine hydrophile Komponente und/oder mindestens einen hydrophilen Substituenten enthalten, vornehmlich wasserlösliche Polyalkylenglykole (insbesondere Polyäthylenglykole, Oligopropylenglykole und Copolyäthylen/propylenglykole) und Polyätherurethandiole, aliphatische oder araliphatische sulfogruppenhaltige Diole die eine oder mehrere, z.B. eine oder zwei, Sulfogruppen enthalten, und aliphatische oder araliphatische carboxygruppenhaltige Diole die eine oder mehrere, z.B. eine oder zwei, Carboxygruppen in Alkalimetallsalzform enthalten;

(B) aliphatische, aromatische oder araliphatische Dicarbonsäuren, insbesondere

(B₁) Alkandicarbonsäuren mit 2 bis 10 Kohlenstoffatomen im Alkanrest, wobei, wenn der Alkanrest 4 bis 10 Kohlenstoffatome enthält, er gegebenenfalls durch Sauerstoff unterbrochen sein kann, aromatische Dicarbonsäuren mit einem bis drei Benzolringen, wovon zwei gegebenenfalls kondensiert sein können, oder araliphatische Dicarbonsäuren, die 9 bis 18 Kohlenstoffatome enthalten und dabei einen Benzolring oder zwei gegebenenfalls kondensierte Benzolringe enthalten, wobei aromatische Ringe gegebenenfalls über Sauerstoff an weitere aliphatische, aromatische oder araliphatische Teile des Moleküls gebunden sein können oder gegebenenfalls über eine Sulfongruppe an einen weiteren aromatischen Teil des Moleküls gebunden sein können,

und (B₂) aliphatische, aromatische oder araliphatische Dicarbonsäuren, die mindestens 4 Kohlenstoffatome enthalten und worin der Kohlenwasserstoffrest, an welchen mindestens eine der zwei Carboxygruppen gebunden ist, 1 bis 14 Kohlenstoffatome enthält, und die im Molekül mindestens einen hydrophilen Rest (z.B. eine hydrophile Polyäthylenglykolätherkette) und/oder mindestens einen hydrophilen Substituenten (z.B. eine oder mehrere, insbesondere eine oder zwei, Sulfogruppen) enthalten;

(C) aliphatische Hydroxymonocarbonsäuren, insbesondere
   (C₁) aliphatische unsubstituierte Hydroxycarbonsäuren mit 3 bis 18 Kohlenstoffatomen, gegebenenfalls in Lactonform, oder Vorpolymere (Polyester) davon.

As (D) own in particular

(A) aliphatic or araliphatic diols, in particular

(A ₁ ) aliphatic and araliphatic diols which otherwise contain no hydrophilic components or substituents, in particular alkanediols having 2 to 10 carbon atoms, wherein the alkane radical may be linear or, if it contains 3 to 10 carbon atoms, may also be branched, or if it is 4 bis Contains 10 carbon atoms, may also be cyclic, di (C _1-2 hydroxyalkyl) benzenes, water-insoluble polyether diols, polyester diols, polycarbonate diols, polyurethane diols and polyesterurethane diols,

and (A ₂ ) aliphatic or araliphatic diols which contain at least one hydrophilic component and / or at least one hydrophilic substituent, primarily water-soluble polyalkylene glycols (in particular polyethylene glycols, oligopropylene glycols and copolyethylene / propylene glycols) and polyetherurethane diols, aliphatic or araliphatic sulfo-containing diols which contain one or more for example, one or two, contain sulfo groups, and aliphatic or araliphatic carboxy-containing diols containing one or more, for example one or two, carboxy groups in alkali metal salt form;

(B) aliphatic, aromatic or araliphatic dicarboxylic acids, in particular

(B ₁ ) Alkanedicarboxylic acids having 2 to 10 carbon atoms in the alkane radical, wherein, when the alkane radical contains 4 to 10 carbon atoms, it may optionally be interrupted by oxygen, aromatic dicarboxylic acids having one to three benzene rings, two of which may optionally be condensed, or araliphatic dicarboxylic acids containing 9 to 18 carbon atoms and thereby containing a benzene ring or two optionally fused benzene rings, wherein aromatic rings may optionally be bonded via oxygen to other aliphatic, aromatic or araliphatic parts of the molecule or optionally bonded via a sulfone group to another aromatic part of the molecule could be,

and (B ₂ ) aliphatic, aromatic or araliphatic dicarboxylic acids containing at least 4 carbon atoms and wherein the hydrocarbon group to which at least one of the two carboxy groups is attached contains from 1 to 14 carbon atoms and which contains in the molecule at least one hydrophilic group (eg a hydrophilic group) Polyäthylenglykolätherkette) and / or at least one hydrophilic substituent (eg one or more, especially one or two, sulfo groups) contain;

(C) aliphatic hydroxymonocarboxylic acids, in particular
(C ₁ ) aliphatic unsubstituted hydroxycarboxylic acids having 3 to 18 carbon atoms, optionally in lactone form, or prepolymers (polyesters) thereof.

Examples of (A ₁ ) include ethylene glycol, 1,3-propanediol, 2,4-dimethyl-2-ethylhexane-1,3-diol, 2,2-dimethyl-1,3-propanediol, 2-ethyl-2 butyl-1,3-propanediol, 2-ethyl-2-isobutyl-1,3-propanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 2,2 , 4-trimethyl-1,6-hexanediol, 1,2-, 1,3- or 1,4-cyclohexanedimethanol, 2,2,4,4-tetramethyl-1,3-cyclobutanediol, para-xylylenediol, 1,2 Polypropylene glycol, neopentyl glycol, polytetrahydrofurans, higher polypropylene glycols (with> 10 monomer units), polycaprolactones from the addition of an ε-caprolactone to an alkanediol (for example to one of the abovementioned), or polycarbonate diols from the abovementioned alkanediols. Among the diols (A ₁ ), the C _2-4 alkanediols are preferred, in particular propylene glycol, ethylene glycol and combinations of propylene glycol and ethylene glycol.

Examples of (A ₂ ) include: polyethylene glycols (eg having an average molecular weight M _w in the range of 200 to 10,000, preferably 500 to 5000), water-soluble oligopropylene glycols (with ≤ 10 monomer units), alkanediols having 4 to 10 carbon atoms and one or two sulfo groups as substituents, and optionally oxyethylated and / or oxypropylated, Benzoldimethanole the on the benzene ring carry a sulfo group as a substituent, for example 2-sulfobutanediol and addition products thereof with ethylene oxide and optionally propylene oxide, sulfo-1,2-benzenedimethanol (sulfo-xylene glycol) and sulfo-1,4-benzenedimethanol, or sulfonated Diepoxyde of alkanediols or polyethylene glycols (For example, from the reaction of the respective alkanediols or polyethylene glycols with epichlorohydrin and sulfonation with a bisulfite, for example with sodium bisulfite) and sulfonated alkoxylated alkenediols (eg from the sulfonation of the adduct of oxiranes - especially ethylene oxide and / or propylene oxide - to alkenediols with sulfite, eg with Sodium sulfite), or still monoamidia di- or higher carboxylic acids [eg those of the type below (B ₁ ) or (H ₂ )] with low molecular weight dialkanolamines, for example with di-ethanol, -propanol or -isopropanol-amine, wherein the non-amidated carboxy groups in alkali metal salt form (especially as Na, Li or K salt) are present. Among the diols (A ₂ ), the polyethylene glycols are preferred.

As (B ₁ ) there may be mentioned, for example: adipic acid, succinic acid, glutaric acid, pimelic acid, suberic acid (suberic acid), azelaic acid, sebacic acid, maleic acid, fumaric acid, dimethylmalonic acid, diglycolic acid, 3,3'-oxydipropionic acid, trimethyladipic acid, itaconic acid, orthophthalic acid, isophthalic acid, terephthalic acid , Oxydibenzoic acid, naphthalene-2,6-dicarboxylic acid, naphthalene-1,8-dicarboxylic acid, naphthalene-1,4-dicarboxylic acid, 1,2-di- (p-carboxyphenoxy) -ethane, 1,2-di- (p-) carboxyphenyl) ethane, biphenyl-2,2'-dicarboxylic acid, 1,4-cyclohexanedicarboxylic acid and 4,4'-dicarboxy-diphenylsulfone. Among the aliphatic dicarboxylic acids (B ₁ ), the α, ω-dicarboxylic acids are preferred; among the aliphatic, aromatic and araliphatic dicarboxylic acids (B ₁ ) are the aromatic preferred, especially the terephthalic acid.

Examples which may be mentioned as (B ₂ ) are: sulfosuccinic acid, methylsulfosuccinic acid, sulfomethylsuccinic acid, 4-sulfophthalic acid, 5-sulfoisophthalic acid, dimethyl sulfoisophthalic acid, sulfoterephthalic acid, sulfomalonic acid 5- (p-sulfophenoxy) -isophthalic acid 1,3-dimethyl ester, phenyl-3, 5-dicarboxybenzenesulfonic acid, 2,6-dimethylphenyl-3,5-dicarboxybenzenesulfonic acid, naphthyldicarboxylic acid -benzenesulfonic acid, sulfo-4-naphthalene-2,7-dicarboxylic acid, sulfo-bis (hydroxycarbonyl) -4,4'-diphenylsulfone, and sulfonation products of oligoesters unsaturated dicarboxylic acids obtainable by reaction thereof, for example with sodium sulfite, for example based on maleic acid, itaconic acid or citraconic acid, for example with the abovementioned alkanediols, and polyoxyalkylenedicarboxylic acids, for example from the carboxymethylation of polyalkylene glycols or from the catalytic or electrochemical oxidation of the terminal CH ₂ -OH groups of Polyalkylene glycols to COOH groups, wherein the Polyakylenglykole vo Preferably, polyethylene and / or propylene glycols are. Among the sulfo-containing acids (B ₂ ), especially the 5-sulfo-isophthalic acid is preferred; Among the acids (B ₂ ), the sulpho group-free are preferred, especially the polyäthylenglykolätherkettenhaltigen.

Examples of (C ₁ ) include: glycolic acid, hydroxypropionic acid, 12-hydroxystearic acid, 2-hydroxycaproic acid, 3- or 4-hydroxybutyric acid, ε-caprolactone, γ-butyrolactone and 3,3-dimethyl-4-butyrolactone, and prepolymers thereof.

(E₁) einfache Alkohole oder Carbonsäuren, die nicht zur Hydrophilie des Polyesters beitragen,

und (E₂) Hydroxy- oder Carboxyverbindungen, die zur Hydrophilie der Polyester beitragen können, besonders solche, die hydrophile Polyalkylenglykolätherketten enthalten und/oder eine oder zwei Sulfogruppen als Substituenten tragen.

Suitable monofunctional compounds (E) for the end closure of the polyester are, for example

(E ₁ ) simple alcohols or carboxylic acids which do not contribute to the hydrophilicity of the polyester,

and (E ₂ ) hydroxy or carboxy compounds which may contribute to the hydrophilicity of the polyesters, especially those which contain hydrophilic polyalkylene glycol ether chains and / or carry one or two sulfo groups as substituents.

(E₁₁) einfache aliphatische oder araliphatische Alkohole, z.B. C_1-6-Alkanole und Phenylalkanole,

und (E₁₂) einfache aliphatische, araliphatische oder aromatische Monocarbonsäuren, z.B. C_2-4-alkanoische Säuren und gegebenenfalls alkylsubstituierte Benzoesäuren.

As (E ₁ ) own in particular

(E ₁₁ ) simple aliphatic or araliphatic alcohols, for example C _1-6 -alkanols and phenylalkanols,

and (E ₁₂ ) simple aliphatic, araliphatic or aromatic monocarboxylic acids, for example C _2-4 -alkanoic acids and optionally alkyl-substituted benzoic acids.

(E₂₁) aliphatische oder araliphatische Hydroxyverbindungen, die einen hydrophilen Molekülteil enthalten, z.B. eine Polyalkylenglykolätherkette enthalten und/oder eine oder mehrere Sulfogruppen als Substituenten tragen,

und (E₂₂) aliphatische, araliphatische oder aromatische, carboxygruppenhaltige, hydrophile Verbindungen, die einen hydrophilen Molekülteil enthalten, z.B. eine Polyalkylenglykolätherkette enthalten und/oder eine oder mehrere Sulfogruppen als Substituenten tragen.

As (E ₂ ) own in particular

(E ₂₁ ) aliphatic or araliphatic hydroxy compounds which contain a hydrophilic moiety, for example contain a polyalkylene glycol ether chain and / or carry one or more sulfo groups as substituents,

and (E ₂₂ ) aliphatic, araliphatic or aromatic, carboxy group-containing, hydrophilic compounds which contain a hydrophilic moiety, for example contain a polyalkylene glycol ether chain and / or carry one or more sulfo groups as substituents.

As (E ₁₁ ), mention may be made, for example, of: methanol, ethanol, isopropanol, cyclohexanol, benzyl alcohol and (C _1-4 -alkyl) -benzyl alcohol.

As (E ₁₂ ) may be mentioned, for example: benzoic acid, acetic acid and propionic acid.

Alkylen

Äthylen und/oder Propylen-1,2,

R

Wasserstoff oder SO₃H,

m

0 oder 1

und n

eine Zahl im Bereich von 1 bis 30

bedeuten, wobei mindestens eines der beiden Symbole R SO₃H bedeutet.Examples which may be mentioned of (E ₂₁ ) are addition products of ethylene oxide and / or propylene oxide, and optionally butylene oxide or styrene oxide, to an aliphatic monoalcohol having 1 to 18 carbon atoms or to an alkylphenol having a total of 10 to 24 carbon atoms, advantageously at least 50 mol% the alkyleneoxy groups present are ethyleneoxy groups and the incorporated polyalkylene glycol ether chains are preferably those consisting exclusively of ethyleneoxy units (eg up to an average molecular weight in the range of 200 to 20,000, especially 200 to 5,000), and aliphatic and / or araliphatic hydroxy compounds containing one or two sulfo groups as substituents and optionally contain oxyethylene and / or oxypropylene groups in the molecule. Including addition product of ethylene oxide to a low molecular weight alkanol (especially C _1-4 alkanol) are preferred. Particularly noteworthy sulfo-containing compounds of the type (E ₂₁ ) are 2-hydroxyethanesulfonic acid, 2-hydroxypropanesulfonic acid, 4- (2-hydroxyethoxy) -benzenesulfonic acid and compounds of the average formula H (O-alkylene) _n -O-CH ₂ -CHR) _m -CH ₂ -R wherein

alkylene

Ethylene and / or propylene-1,2,

R

Hydrogen or SO ₃ H,

m

0 or 1

and n

a number in the range of 1 to 30

mean, wherein at least one of the two symbols R SO ₃ H means.

As (E ₂₂ ) are, for example: Carboxymethylierungsprodukte of addition products of ethylene oxide and / or propylene oxide to an aliphatic monoalcohol having 1 to 18 carbon atoms, wherein advantageously at least 50 mol% of the existing Alkylenoxygruppen Äthylenoxygruppen and the incorporated Polyalkylenglykolätherketten are preferably those exclusively from ethyleneoxy units (eg up to an average molecular weight in the range of 200 to 5000), or products of catalytic or electrochemical oxidation of the terminal -CH ₂ -OH groups of such addition products to terminal -COOH groups, or aliphatic, araliphatic or aromatic carboxylic acids 7 to 22 carbon atoms which carry a sulfo group as a substituent, for example ortho, meta or para-sulfobenzoic acid or sulfonated oleic acid (for example from the reaction of oleic acid with sodium sulfite). Among the compounds mentioned (E ₂₂ ), the sulfo group-free are preferred.

Among the components (E ₁ ) and (E ₂ ), the components (E ₂ ) are preferred, especially (E ₂₁ ), especially the non-ionic.

(H₁) Verbindungen die 3 bis 10 alkoholische Hydroxygruppen enthalten,

(H₂) Verbindungen die 3 oder mehr, z.B. 3 oder 4, Carboxygruppen enthalten,

und (H₃) Hydroxycarbonsäuren die mindestens 2 Carboxygruppen und/oder mindestens 2 Hydroxygruppen enthalten.

As (H) are tri- and higher oligofunctional compounds which can lead to branched products with ester formation, in particular

(H ₁ ) compounds containing 3 to 10 alcoholic hydroxy groups,

(H ₂ ) compounds containing 3 or more, eg 3 or 4, carboxy groups,

and (H ₃ ) hydroxycarboxylic acids containing at least 2 carboxy groups and / or at least 2 hydroxy groups.

As (H ₁ ) are, for example tri to Hexahydroxyalkane eg having 3 to 6 carbon atoms into consideration, for example pentaerythritol, trimethylolethane, trimethylolpropane, glycerol, mannitol, sorbitol and 1,2,3-hexanetriol, and their alkoxylation, especially Oxyäthylierungs- and / or oxypropylation products, for example with 1 to 20 oxyethylene groups and optionally 1 to 10 oxypropylene groups.

As oligocarboxylic acids (H ₂ ) it is possible to use aliphatic, araliphatic or preferably aromatic compounds, for example having 6 to 15 carbon atoms, preferably benzene tricarboxylic acids (in particular trimellitic acid, hemimellitic acid or trimesic acid).

Suitable hydroxycarboxylic acids (H ₃ ) are aromatic or else aliphatic compounds, for example aromatic benzeneic dicarboxylic acids which carry a hydroxy group on the benzene ring, for example hydroxy-4-or -5-isophthalic acid, or aliphatic saturated dicarboxylic acids having 4 to 8 carbon atoms, for example hydroxyl 2-methylsuccinic acid, hydroxymethylglutaric acid and hydroxyglutaric acid, or aliphatic saturated carboxylic acids having 3 to 8 carbon atoms, which may carry 2 to 6 hydroxy groups, in particular ascorbic acid, gluconic acid and glucoheptonic acid, or else partial amidation products of tri- or higher-functional carboxylic acids [eg those of the type (H ₂ )] with low molecular weight mono- or dialkanolamines, for example with mono- or di-ethanol, -propanol- or -isopropanol-amine, or even monoamidation of dicarboxylic acids [eg those of the type (B ₁ )] with low molecular weight dialkanolamines, for example with di ethanol, propanol or isopropanolamine, which does not amidate en carboxy groups in the form of the free acid.

For the preparation of the present invention to be employed polyester (P _S) is advantageously difunctional compounds are used, in particular diols (A) provided with corresponding dicarboxylic acids, in particular of type (B) or functional derivatives thereof and optionally with hydroxycarboxylic acids of type (C) are reacted, or polymerization products of hydroxycarboxylic acids (or lactones thereof), in particular of the type (C) which are optionally further reacted with (poly) esters of diols, in particular of the type (A), with corresponding dicarboxylic acids, in particular of type (B), or functional derivatives thereof. If desired, it is possible to use monofunctional and / or higher oligofunctional compounds, for example of the type (E) or (H), to prepare, in particular with (H), branched polyesters, or (E) an end group (hydroxy or carboxy group ) to close. The relative amounts or molar ratios of the respective starting compounds are expediently chosen so that the polyesters produced therefrom have the desired hydrophilic properties, ie in particular such that the polyesters, in addition to a hydrophobic moiety, also have a hydrophilic moiety, which is controlled in particular by suitable choice of corresponding starting compounds can be. Thus, for example, diols of the type (A ₁ ) or dicarboxylic acids of the type (B ₁ ) or hydroxymonocarboxylic acids of the type (C ₁ ) form hydrophobic moieties, while components of the type (A ₂ ) or (B ₂ ) contain hydrophilic moieties be inserted. Also with compounds of the type (E ₂₁ ) and (E ₂₂ ) is contributed to the hydrophilicity of the polyester.

The Veresterungsumsetzung (or transesterification when carboxylic acid ester cleavable alcohols are transesterified) can be carried out in known manner, wherein the respective components selected (D) and optionally (H) and / or (E) with the addition of suitable catalysts, at elevated temperature , for example in the range of 150 to 280 ° C, preferably 160 to 260 ° C, are reacted. If diols (A) are used, it is advantageous to use first the more volatile ones and to add the less volatile to the further esterification after the esterification or advanced esterification thereof. The esterification (or transesterification) can, for example, in the presence of inert solvents or preferably in the absence of any solvent, are first carried out under atmospheric pressure, then under reduced pressure, volatile by-products. For example, unreacted starting materials and other volatile accompanying substances, can be removed. Suitable transesterification and condensation catalysts are, for example, customary compounds of polyvalent metals, for example titanium tetraisopropoxide, manganese (II) acetate, dibutyltin oxide or antimony trioxide / calcium acetate, which can be used in the concentrations customary per se, for example in the range from 0.0005 to 1 wt .-%, particularly 0.002 to 0.1 wt .-%, based on (P _S ).

The hydrophilic starting compounds may be e.g. Exclusively those which are polyethylene glycol ether chains which are suitable or preferred for the preparation of nonionic polyesters are, or only those containing sulfo groups as hydrophilic substituents, which Preparation of anionic polyesters are suitable or preferred, or a combination of both.

The respective molar ratios are advantageously chosen so that an excess of hydroxy compounds relative to carboxy compounds is used in total, depending on the volatility of the diols used, and advantageously so that any carboxy groups with monofunctional alcohols, preferably those of the type (E ₂₁ ), are closed. If higher oligofunctional compounds of the type (H) are used, their molar ratio to the difunctional compounds (D) used is advantageously kept low. In particular, it is advantageous to choose the respective molar ratios so that no substantial cross-linking takes place, especially so that an aqueous dilution of the product does not form gelatinous, irreversible agglomerates but rather a dispersion or solution. If, for example, starting from diols (A ₁ ) and (A ₂ ), dicarboxylic acids (B ₁ ) (or diesters thereof), polyol (H ₁ ) and optionally monofunctional compound (E ₂₁ ) are advantageously per mole of introduced diols [(A ₁ ) + (A ₂ )] ≤ 1 molar equivalent, preferably ≤ 0.5 molar equivalents (H ₁ ) used, for example 0.002 to 0.4 molar equivalents thereof. The molar ratio (E ₂₁ ) / [(A ₁ ) + (A ₂ )] is then advantageously in the range of 0.01 to 1, preferably in the range of 0.02 to 0.5, particularly preferably in the range of 0.04 to 0.3. By mol equivalent (H) is meant one mole (H) divided by the number of functional groups; in the case of the oligohydroxy compounds (H ₁ ), one molar equivalent (H ₁ ) is thus one mole (H ₁ ) divided by the number of its hydroxy groups. These molar ratios apply to the specific non-ionic polyesters from the stated starting components; If other and / or further components are used to prepare the polyesters or oligoesters, the molar ratios must, if necessary, be adapted or changed accordingly in order to arrive at the corresponding polyester or oligoester properties. By the reaction with (H) branched, or possibly also dendromere polyester or oligoester (P _S ) can be produced.

The reaction is advantageously controlled so that the average molecular weight M _{w of} the produced polyesters is ≥ 1000, and preferably in the range of 1200 to 10 ⁶ , more preferably in the range of 1500 to 3 x 10 ⁵ . The synthesis of the polyester to be used according to the invention is advantageously carried out so that the degree of polymerization can be kept relatively low, in particular so that oligoesters are formed.

The anionic groups present in the polyester (P _S ), in particular sulpho groups and / or carboxy groups, can be present in the form of the free acid and, if desired, converted into a salt form by reaction with corresponding bases, cations which are known per se for salt formation, preferably hydrophilizing cations, come into consideration, for example, alkali metal cations (eg, lithium, sodium, potassium) or ammonium cations {eg unsubstituted ammonium, mono-, di- or tri- (C _1-2 alkyl) -ammonium, mono-, di- or tri- (C _2-3 -hydroxyalkyl) ammonium, mono-, di- or tri - [(C _1-2 -alkoxy) - (C _2-3 -alkyl)] - ammonium or morpholinium}, for which, for example, corresponding alkali metal hydroxides or carbonates, ammonia or the respective amines, preferably in the form of aqueous solutions, can be used.

The hydrophilicity of the products is controlled so that the produced polyesters (P _S ) are water-dispersible to soluble (preferably self-dispersible to colloidally soluble in water), ie. In a concentration of 0.1 to 30 wt .-%, optionally with the aid of suitable dispersants in an amount of up to 50% by weight, based on (P _S ) and optionally heating above the melting point of (P _S ), in water a corresponding 0.1 to 30% strength (P _S ) Dispersion or solution or, for the self-dispersible to soluble, even without the aid of dispersants, in water by simply stirring and optionally heating above the melting point of (P _S ) an aqueous, 0.1 to 30% - (P _S ) Dispersion or an aqueous 0.1 to 30% true or colloidal (P _S ) solution. Such a dispersion or colloidal solution may be cloudy or translucent to transparent, but can still be recognized by Tyndalleffekt in the latter case.

In polyester or oligoester (P _S ) which consists of terephthalic acid [as (B)], ethylene glycol and / or propylene glycol (GL) [as (A ₁ )] and polyethylene glycols [as (A ₂ )] and optionally (H) or (H ₁ ), are prepared and optionally with an oxyethylated alcohol [as (E ₂₁ )] end-capped, the hydrophilicity can be estimated, for example, also on the weight ratio (GL) / (PEG), where (GL) the weight fraction of esterified ethylene glycol and / or propylene glycol and (PEG) means the proportion by weight of total esterified polyoxyethylene [of (A ₂ ) and (E ₂₁ )]. When the polyoxyethylene chains have an average molecular weight in the range from 500 to 5000, preferably 800 to 3000, this weight ratio (GL) / (PEG) for the corresponding polyesters (P _s ) is advantageously in the range from 1: 3 to 1:60, preferably 1: 5 to 1:30. These values apply to the special non-ionic polyesters of the stated starting components; If other and / or other components are used to prepare the polyesters, the values should be adjusted accordingly to obtain the corresponding hydrophilicity.

Among the polyesters (P _s ), the polyesters (P _s ') are preferred, ie those which are self-dispersible or colloidally soluble in water, including in particular the polyesters (P _s "), ie the nonionic, especially those from the esterification or transesterification of (B ₁ ) with (A ₁ ), (A ₂ ) and optionally (E ₂₁ ) and optionally (H ₁ ) or (H ₃ ).

According to a particular embodiment of the invention, (P _S ) such polyesters are used as are known as soil release agents for textile substrates (eg in detergents).

The prepared polyesters (P _S ) can be handled directly as they are made. Advantageously, they are used in the form of aqueous, preferably concentrated preparations (W). These aqueous preparations (W) are dispersions or colloidal solutions of (P _s ) and advantageously contain the polyesters (P _s ) in a concentration in the range from 1 to 50% by weight, preferably 2 to 50% by weight, more preferably 3 to 25 wt .-%. The aqueous preparations (W) may be simple aqueous dispersions or colloidal solutions only of (P _s ), or preferably contain further additives, in particular
(G) a thickener.

Suitable thickeners (G) are known, preferably nonionic and / or anionic substances, in particular natural, modified or synthetic polymers. Polysaccharides, polysaccharide derivatives and (co) poly (meth) acrylic acids and / or amides, for example xanthan gum, cellulose gum, guar gum, dextrins, gum arabic, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, acryl modified polysaccharides, copoly, can be used as thickening agent (G) (meth) acrylic acids / (meth) acrylamides and optionally partially hydrolyzed poly (meth) acrylamides. These include hydrophilic resins which are viscoelastic in aqueous solution and preferably also pseudoplastic and non-thixotropic, for example xanthan gum, cellulose gum, guar gum, dextrins, gum arabic, hydroxyethylcellulose, hydroxypropylcellulose and carboxymethylcellulose or also the abovementioned (meth) acrylic acid and / or or amide (co) polymers, among which xanthan gum, homopolyacrylamides, copolyacrylamide / acrylic acid and partially saponified polyacrylamides are particularly preferred. The acid groups, especially the carboxylic acid groups, are advantageously at least partly in the form of salts (so that the respective products are water-soluble), for example as alkali metal salts (primarily sodium salts). They can be used as dry substance (eg as commercially available). If thickening agents (G) are used, they are advantageously employed in amounts such that the viscosity of the aqueous concentrated dispersions (W) is <5000 mPa · s, in particular at values ≦ 1000 mPa · s, preferably in the range from 50 to 1000 mPa · s, come to rest. The concentration of thickener (G) in (W) is advantageously low, in particular lower than that of (P _s ), and, calculated as dry matter, is for example ≦ 5% by weight, advantageously 0 to 4% by weight, preferably 0.01 to 2 wt .-%, particularly preferably 0.1 to 1 wt .-%.

(X) ein nicht-ionogenes oder anionisches Tensid oder ein Gemisch aus nicht-ionogenen und/oder anionischen Tensiden,

(Y) ein Mittel zur pH-Einstellung

und (Z) mindestens ein Formulierungszusatz,

If desired, in the aqueous preparations (W), in addition to (P _S ) and optionally (G), further additives may be present, in particular one or more of the following components:

(X) a nonionic or anionic surfactant or a mixture of nonionic and / or anionic surfactants,

(Y) a pH adjusting agent

and (Z) at least one formulation additive,

(X₁) ein nicht-ionogenes Tensid oder ein Gemisch nicht-ionogener Tenside, mit HLB ≥ 7,

und (X₂) ein anionaktives Tensid, welches eine Carbonsäure oder Sulfonsäure oder ein Schwefelsäure- oder Phosphorsäureteilester oder ein Salz davon ist, oder ein Gemisch solcher anionaktiver Tenside, mit HLB ≥ 7,

oder Gemische von zwei oder mehreren der Tenside (X₁) und (X₂), insbesondere mindestens ein Tensid (X₁).Suitable surfactants (X) are primarily the following:

(X ₁ ) a nonionic surfactant or a mixture of nonionic surfactants, with HLB ≥ 7,

and (X ₂ ) an anionic surfactant which is a carboxylic acid or sulfonic acid or a sulfuric acid or phosphoric acid partial ester or a salt thereof, or a mixture of such anionic surfactants, with HLB ≥ 7,

or mixtures of two or more of the surfactants (X ₁ ) and (X ₂ ), in particular at least one surfactant (X ₁ ).

The surfactants (X ₁ ) and (X ₂ ) generally have a dispersing character, in particular an emulsifier character.

R₁

einen aliphatischen, linearen Kohlenwasserstoffrest mit 9 bis 22 Kohlenstoffatomen
und

p

4 bis 40

bedeuten, oder Gemische solcher Tenside.Suitable surfactants (X ₁ ) are generally known compounds, essentially those having an emulsifier or dispersant character. Nonionic character emulsifiers and dispersants are well known in the art and are also described in the literature, eg in MJ SCHICK "Non-ionic Surfactants" (Vol. 1 of "Surfactant Science Series", Marcel DEKKER Inc., New York , 1967). Suitable non-ionic dispersants (X ₁ ) are primarily alkoxylation products of fatty alcohols, fatty acids, fatty acid mono- or dialkanolamides (wherein "alkanol" stands especially for "ethanol" or "isopropanol") or fatty acid partial esters of tri- to hexafunctional aliphatic polyols or still Interoxalkylierungsprodukte of fatty acid esters (eg of natural triglycerides), wherein as alkoxylating agent C _2-4 alkylene oxides and optionally styrene oxide come into consideration and preferably at least 50% of the introduced Oxakyleneinheiten are Oxäthyleneinheiten; at least 80% of the introduced oxyalkylene units are advantageously oxethylene units; particularly preferred are all introduced oxalkylene units Oxäthyleneinheiten. The starting materials for the addition of the oxalkylene units (fatty acids, fatty acid mono- or dialkanolamides, fatty alcohols, fatty acid esters or Fettsäurepolyolpartialester) may be any conventional products, such as those used to prepare such surfactants, especially those having 9 to 24, preferably 11 to 22 , particularly preferably 16 to 22 carbon atoms in the fat residue. The fat residues may be unsaturated or saturated, branched or linear; there may be mentioned, for example, the following fatty acids: lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, arachidic acid and behenic acid and technical fatty acids, for example tallow fatty acid, coconut fatty acid, technical oleic acid, tall oil fatty acid and technical grade soybean oil, and their hydrogenation and / or distillation products; as fatty acid mono- or -dialkanolamide example, the mono- or di-ethanol or -isopropanolamide of said acids may be mentioned; as fatty alcohols, the derivatives of the respective fatty acids mentioned as well as synthetic alcohols, for example from the oxo synthesis, from the Ziegler method and / or from the Guerbet method [eg isotridecanols, Alfoltypen (eg Alfol 10, 12 or 14) and 2-Butyloctanol] may be mentioned , As partial esters of said polyols, there may be mentioned, for example, the mono- or difatty acid esters of glycerol, erythritol, sorbitol or sorbitan, in particular the sorbitan mono- or di-oleates or stearates. Of the products mentioned, the oxyalkylated fatty alcohols are preferred, especially the oxyethylation products of linear fatty alcohols, especially those of the following average formula R _{1 is} -O- (CH ₂ -CH ₂ -O) _p -H wherein

R ₁

an aliphatic, linear hydrocarbon radical having 9 to 22 carbon atoms
and

p

4 to 40

mean, or mixtures of such surfactants.

The HLB value of the surfactants (X ₁ ) is advantageously in the range of 7 to 20, preferably in the range of 8 to 16. Of the compounds of formula (II), those are particularly preferred wherein R _{1 contains} 11 to 18 carbon atoms.

Suitable anionic surfactants (X ₂₎ are generally known per se acids (or salts thereof) with tensidem character into consideration, as are customarily per se as dispersants, for example as emulsifiers or as detergents use. Such surfactant anionic compounds are known in the art and have been extensively described in the literature, eg in WM LINFIELD "Anionic Surfactants" (Volume 7 of "Surfactant Science Series", Marcel DEKKER Inc., New York, 1976). Particularly suitable are those anionic surfactants which contain a lipophilic radical (in particular the radical of a fatty acid or an aliphatic hydrocarbon radical of a fatty alcohol) which contains, for example, 8 to 24 carbon atoms, advantageously 10 to 22 carbon atoms, in particular 12 to 18 carbon atoms and be aliphatic or araliphatic and wherein the aliphatic radicals can be linear or branched, saturated or unsaturated. In the case of carboxylic acids, the lipophilic radicals are preferably purely aliphatic, while in the case of sulfonic acids the lipophilic radicals are preferably saturated purely aliphatic or araliphatic radicals. The carbon or sulfonic acid group may be bonded directly to the hydrocarbon radical (in particular as fatty acid, for example in the form of soaps or as alkanesulfonic acid) or via a bridge interrupted by at least one heteroatom, which is preferably aliphatic. The introduction of carboxy groups can be carried out, for example, by oxidation of -CH ₂ -OH groups, carboxyalkylation of hydroxy groups or monoesterification of a hydroxy group with a dicarboxylic acid anhydride, for example in such a molecule as mentioned above as starting material for the alkoxylation to nonionic surfactants or of alkoxylation products thereof, wherein oxiranes can be used for the alkoxylation, especially ethylene oxide, propylene oxide and / or butylene oxide and optionally styrene oxide, and preferably at least 50 mol% of the oxiranes used is ethylene oxide; For example, this addition products of 1 to 12 moles of oxirane to 1 mole of hydroxy compounds, especially as mentioned above as the starting material for alkoxylation. For carboxyalkylation, preference is given to using haloalkanecarboxylic acids, advantageously those in which the halogenoalkyl radical contains from 1 to 4 carbon atoms, preferably 1 or 2 carbon atoms, halogen is primarily chlorine or bromine and the acid group may optionally be present in salt form. A carboxy group can also be introduced, for example, by monoesterification of an aliphatic dicarboxylic acid, for example by reaction of a hydroxy compound with a cyclic anhydride, for example with phthalic anhydride or an aliphatic anhydride having 2 or 3 carbon atoms between the two carboxy groups, eg succinic anhydride, maleic anhydride or glutaric anhydride. Similarly, by esterification, for example, phosphoric acid or sulfuric acid partial ester groups can be introduced. Suitable sulfonic acids are essentially sulfonation products of paraffins (for example prepared by sulfochlorination or sulfoxidation), of α-olefins, of alkylbenzenes and of unsaturated fatty acids or else of formaldehyde condensates of sulfonated aromatics (for example of sulfonated naphthalene). The anionic surfactants are advantageously used in the form of salts, wherein for salt formation preferably hydrophilizing cations into consideration, in particular alkali metal cations (eg lithium, sodium, potassium) or ammonium cations [eg the above] or alkaline earth metal cations (eg calcium or magnesium). Among the mentioned anionic surfactants (X ₂ ), the ester group-free are preferred, especially soaps, especially amine soaps, and the carboxymethylation of oxyethylated fatty alcohols and the sulfonic acids, preferably in salt form as mentioned above, especially as alkali metal salts.

The surfactants (X) are advantageously used in amounts which are sufficient so that (P _S ) and optionally (G) can be well dispersed in the aqueous phase and a particularly stable aqueous dispersion of (P _S ) and (G) can arise ,

The amount of (X) used is advantageously ≤ 80 wt .-% of (P _S), preferably ≤ 50 wt .-% of (P _S), particularly preferably 0 to 30 wt .-% of (P _S). When (P _S ) is self-dispersible to soluble [preferably (P _S ')], (X) is not necessary.

As (Y), any compounds known per se are suitable, as they are for the adjustment of the pH of fabric treatment agents are commonly used, for example, those above mentioned bases, or buffer salts such. Sodium acetate or mono- or disodium phosphate, or occasionally also acids (for example a mineral acid, in particular hydrochloric acid or sulfuric acid, or a low molecular weight aliphatic acid preferably having 1 to 4 carbon atoms, preferably formic acid, acetic acid or lactic acid).

The pH of the dispersions (W) can vary widely and optionally by addition of (Y) can be adjusted, e.g. in the range of 3 to 10, preferably 4 to 9, more preferably 5 to 8.

Optionally, the dispersions (W) additionally contain at least one formulation additive (Z), in particular (Z ₁ ) an antifoam or (Z ₂ ) a bacterial growth inhibiting agent or a microbicide, or (Z ₃ ) a bleaching agent. As (Z ₁ ) it is possible to use customary defoamers, for example those based on paraffins, mineral oil, fatty acid bisamides and / or hydrophobic silica, for example commercially available products which can be used in the respectively recommended concentrations. Fungicides and bactericides are particularly suitable as (Z ₂ ), for example commercially available products which can be used in the respective recommended concentrations. As (Z ₃ ), conventional bleaching agents can be used, especially reductive bleaching agents such as sodium bisulfite. Suitable concentrations of (Z) are for example in the range of 0 to 4 wt .-%, preferably 0.001 to 2 wt .-%, particularly preferably 0.002 to 1 wt .-% based on (W).

Particularly worthy of mention are the dispersions (W ') consisting essentially of (P _S ) and water and optionally one or more of the additives (G), (X), (Y) and / or (Z) [eg (P _S ), (G) and water and optionally (X), (Y) and / or (Z)], especially the dispersions (W ") consisting essentially of (P _S '), water and preferably (G) and additionally optionally one or more of the additives (Y) and / or (Z), especially from (P _S ") or (P _S "') and water and preferably (G) and optionally one or more of the additives (Z ₁ ) , (Z ₃ ) and / or (Y).

The (G) -containing dispersions (W) according to the invention, in particular (W ') and preferably (W "), can be prepared in a very simple manner by suitable mixing of the components, in particular by (P _S ), for example as Melt, in the presence of water, with (G) and optionally (X) mixed successively in any order and optionally further additives, in particular (X), (Y) and / or (Z), is added.

The above-described polyesters (P _S ), preferably in the form of aqueous dispersions (W), find their use as wet lubricants, ie as auxiliaries in the treatment of textile fabrics with treatment agents (T) (eg pretreatment, dyeing, optical brightening or aftertreatment) such conditions under which otherwise creases may occur or friction may take place in or on the substrate, wherein the dispersions (W) to be used according to the invention are particularly useful for preventing the stabilization and marking of wrinkles arising in the course of treatment and for preventing harmful frictions. Such processes are essentially extraction processes from a short liquor (weight ratio of liquor / substrate, for example in the range from 3: 1 to 40: 1, usually 4: 1 to 20: 1) under the usual treatment conditions and times (eg in the range of 20 minutes to 12 hours).

The dispersions (W), or the polyesters (P _S ), even in the presence of (G), have an optimal Naßgleitverhalten so that their use an effective distribution on the surface of the wet material is possible, after which they are generally by draining the liquor can be excreted again and / or eliminated by the process-related washing and / or rinsing.

The treating agents (T) are generally textile chemicals (especially textile finishing chemicals), after each treatment of the substrate, for the part of the substrate is not fixed, can be removed from the substrate again, e.g. by washing or / and rinsing.

(T₁) Vorbehandlungsmittel (hauptsächlich Netzmittel und Waschmittel),

(T₂) Hauptbehandlungsmittel (hauptsächlich Netzmittel, Farbstoffe, Färbehilfsmittel und optische Aufheller),

und (T₃) Nachbehandlungsmittel (hauptsächlich Ausrüstungsmittel, Reinigungsmittel und Reduktionsmittel);

wobei die jeweiligen Behandlungen in wäßrigem Medium durchgeführt werden.In particular, the following subgroups can be considered as (T):

(T ₁ ) pretreatment agents (mainly wetting agents and detergents),

(T ₂ ) main treatment agents (mainly wetting agents, dyes, coloring agents and optical brighteners),

and (T ₃ ) aftertreatment agents (mainly finishing agents, detergents and reducing agents);

wherein the respective treatments are carried out in an aqueous medium.

As processes in which creases can arise in the textile substrate, what is meant are essentially those in which the wet substrate tends to wrinkle due to the action and possibly interference of different forces. The wrinkles that result in such processes can per se lead to marking of the kinks by stabilization in the course of the treatment process, which can lead to the abovementioned disadvantages. In such processes, the polyesters (P _S ) and the dispersions (W) serve as Naßgleitmittel, in particular as Lauffaltenverhinderungsmittel, u.zw. in so far as they promote or facilitate a sliding of the wet substance or the wet wrinkles and thus can prevent a harmful stabilization of the running wrinkles. As a crease-causing treatment processes are mainly treatments on a reel (especially in a winch skid) or especially in jet dyeing machines (jet-dyeing machines) into consideration, wherein the substrate is guided in each cycle on the reel or through the nozzle, at which point the Wrinkling or / and the forces acting on the wrinkles, which can lead to the stabilization of the wrinkles, are the strongest.

As a method in which friction can take place in or on the textile substrate, essentially those are meant in which the wet substrate rubs against apparatus parts or adjacent substrate parts by high running speed, guidance by nozzles or / and changing the running direction and / or speed. The chafing marks produced in such processes can lead to marking of the same in the course of the treatment process and impairment of the physical properties of the substrate. In such processes, the polyesters (P _s ) and the dispersions (W) serve as wet lubricants, insofar as they promote or permit sliding of the wet material (especially on adjacent fabric or on metal) and thus prevent damaging friction of the substrate , As rubbing-causing treatment methods, treatments are mainly used in jet-dyeing machines, wherein the substrate is guided through the nozzle in each cycle, at which point the relative acceleration and / or forces acting on the substrate are strongest, and wherein The substrate is pulled in each cycle from its own position in the fleet to the nozzle, so that at the respective locations, the substrate-to-substrate acceleration or substrate-to-metal acceleration can locally cause friction, which can lead to said chafing ,

As substrates for the process according to the invention and for the wet lubricant according to the invention In general, any substrates are suitable, as they are used in the said method can, especially those of the synthetic fibers, especially polyester fibers, optionally in Mixture with other fibers, in particular with other synthetic fibers (for example acrylic fibers or polyurethane fibers) or optionally modified natural fibers, e.g. made of wool, silk or optionally modified cellulose (e.g., cotton, linen, jute, hemp, ramie, viscose rayon or cellulose acetates), using as fiber mixtures e.g. Polyester / cotton, polyester / acrylic, Polyester / polyamide, polyester / polyurethane and polyester / cotton / polyurethane mentioned can be. The textile substrate can be used in any form as piece goods, as it can be treated in said processes, e.g. as tubular fabric, as open Textile webs or as semi-finished goods, essentially in strand form or tubular shape, as they suitable for reel or especially jet; Both knitwear and fabric can be used (for example fine to coarse simple knitwear or interlock, fine to coarse mesh, Terry cloth, velvet and open-worked or / and machine-embroidered textiles), in particular also Microfibre articles, in particular polyester microfibers and mixtures thereof with others correspondingly fine fibers.

The wet-acting lubricants according to the invention, ie, polyesters (P _S) or dispersions (W), are expediently employed in concentrations such that the respective methods are effectively prevented the fold marking and chafe point formation. They are characterized by their effectiveness and exhaustiveness and can have a very high effect at very low concentrations; Advantageously, they are used in concentrations which are 0.01 to 2 g (P _s ) per liter of liquor, preferably 0.02 to 1 g (P _s ) per liter of liquor, more preferably 0.04 to 0.5 g (p _S ) per liter of fleet.

Since wet-acting lubricants according to the invention, ie polyesters (P _S) or dispersions (W), are also distinguished by their great independence of temperature variations and are substantially electrolyte-resistant, they can also be in a very wide choice of treatment conditions as for treatment with textile chemicals (T) occur in the art, in particular for pretreatment with (T ₁ ), for dyeing or optical brightening with (T ₂ ) and for post-treatment with (T ₃ ) can be used, for example with (T ₁ ) during desizing or bleaching, with (T ₂ ) during dyeing or optical whitening or also with (T ₃ ) during aftertreatment, but especially during dyeing or optical brightening. For dyeing or optical brightening, it is possible to use any dyes or optical brighteners (T ₂ ) which are suitable for the particular substrate and process and for the desired effect, and if appropriate dyeing assistants (T ₂ ). For the dyeing of polyester-containing substrates, it is possible to use any corresponding dyes, for example disperse dyes, and optionally dyeing auxiliaries (for example carriers and / or leveling agents), it also being possible to use corresponding additional dyes for dyeing substrates of fiber mixtures, in particular of cellulose fibers and synthetic fibers , in particular reactive dyes, direct dyes, vat dyes or sulfur dyes (and optionally also corresponding dyeing auxiliaries). The processes can be run through any temperature ranges as they are used for the particular substrate and the treatment agent used, as well as by the apparatus and the desired purpose, for example, from room temperature (eg at dye start) to HT conditions (eg in the range of 102 to 180 ° C, in the closed apparatus). The electrolyte content of the liquors may also be arbitrary, as is customarily used for the respective processes, for example in accordance with the alkali metal salt (eg sodium chloride or sodium sulfate) concentrations and / or alkali metal hydroxide or carbonate concentrations, as is the case with dyeing the dyes mentioned are used, whether as blending component in commercial dye preparations and / or as Aufziehhilfsmittel when dyeing or optical brightening, or even as alkalis used in dyeing with sulfur dyes, vat dyes or reactive dyes.

The pH values can be arbitrary, as they are for the respective substrates, dyes and application methods are suitable. For polyester dyeings with disperse dyes are suitable pH values e.g. in the acidic range (for example in the pH range from 4 to 6, preferably 4.5 to 5.5) or else - below Use of appropriate, for alkaline dyeing with suitable disperse dyes - too in the alkaline pH range (for example at pH> 8, especially in the pH range from 8.5 to 10).

Advantageously, the polyesters (P _S ) or dispersions (W) are used as wet lubricants in dyeing or optical brightening, especially in jet dyeing machines (both those with hydrodynamic fleet management and those with aerodynamic fleet management), preferably for dyeing polyester-containing substrates of those consisting essentially only of polyester fibers (especially microfibers).

For use in the treatment of polyester fibers, particularly those polyesters or oligoesters (P _S "') are preferred among the poly- or oligoesters (P _S), wherein the hydrophobic portion of such starting compounds (A ₁₎ and (B ₁₎ or monomer units which are directly homologous to (especially ± 1 to 2 carbon atoms) or preferably identical to those from which the fiber polymer to be treated is derived or built up, eg if the polyester substrate to be treated is a polyester of terephthalic acid and Ethylene glycol (ie, a polyethylene terephthalate), the hydrophobic part of (P _S ) and (P _S "') preferably consists essentially of ester units of terephthalic acid and ethylene glycol and / or propylene glycol, while the hydrophilic part then substantially preferably from (A ₂ ), in particular a polyethylene glycol, and optionally (E ₂₁ ), which then preferably an addition product of ethyl enoxyd to a low molecular weight alkanol (especially C _1-4 alkanol), and the polyester or oligoester (P _S ) or (P _S "') optionally also miteinpolymerisiert a compound (H ₁ ).

Due to the high resistance to temperature fluctuations even at relatively high temperatures, the wet lubricants according to the invention, ie polyester (P _S ) or dispersions (W), can be used under the conditions mentioned and come into their own without impairing their effect. Due to the high shear stability of the wet lubricants (W), especially those consisting only of (P _S ) and (G) and optionally (X), (Y) and / or (Z), in aqueous dispersion or colloidal solution, these are particularly suitable as a wet lubricant in Düsenfärbeapparaten, especially in those in which the goods or the fleet are exposed to extremely high dynamic loads, or in which very high shear forces in the fleet to develop.

The dispersions (W) or the polyesters (or oligoesters) (P _S ) [in particular (P _S ') or (P _S ") or also (P _S "')] have also in very short fleets, eg in fleet / Ware ratios ≤ 15/1, especially also ≤ 10/1, a very good, extremely superficial wet sliding action, especially in so far as they cause the lubricant to accumulate on the surface of the goods and the liquor accumulates in the immediate vicinity of the lubricant and as a flowing liquor layer facilitates the wet gliding of the goods to a surprisingly high degree.

By using the wet lubricant according to the invention (P _S ), especially in the form of their aqueous preparations (W), even when using very short liquors, in particular optimally colored and / or optically brightened materials can be obtained, in which the effect of the respective treatment agent (pretreatment , Dye, optical brightener or aftertreatment agent) is not impaired and an optimal appearance is obtained, even if during the process, the fleet is almost completely on the goods and virtually no fleet is left in the apparatus floor.

The effectiveness of the polyesters (P _S ) and the preparations (W) as wet lubricants can be determined by measuring the coefficient of friction, for example, as follows: A first piece of fabric is stretched against the inner bottom of a low, flat trough, secured with a clamp at one end and covered with a lot of liquor, which corresponds to the usual fleet conditions; then a 200 g weight with smooth, flat, rectangular bottom on which a second piece of the same fabric is stretched and fixed, placed horizontally. Now the applied weight (= "slide") stretched with the second piece of fabric is pulled in the longitudinal direction of the trough and the first stretched fabric piece (= "web") until it starts to move and until it reaches a constant speed, and it determines the pulling force required to move the "carriage" on the "track" horizontally from the end fixed to the clamp and to move horizontally in the pulling direction at a constant speed. As a result, both the static friction and the kinetic friction and thus both the static friction coefficient and the kinetic friction coefficient can be determined.

Denoting by N ₀ the normal force (ie the weight of the "carriage" on the "track"), with Z _S the horizontal traction required to move the "carriage" on the "track" and with Z _{K is} the horizontal tensile force required to keep the "carriage" moving at a constant speed on the "track", so the static friction coefficient μ _{S can be given} by the following formula μ S = Z S N 0 and the kinetic friction coefficient μ _K by the following formula μ K = Z K N 0 be expressed.

By using (P _S ) not only μ _K but also μ _S can be brought to very low values.

The overall effectiveness of wet lubricants can be visually verified by checking the appropriate treated article for the identification of chafe marks or crease markings (e.g. Staining).

In the following examples, the parts are parts by weight and the percentages by weight; the Temperatures are given in degrees centigrade. In the examples (manufacturing, dispersion and examples of application) in addition to the oligoesters added products are commercially available Products. In the application examples, the dyes are in commercial dry form with a pure dye content of about 25% used, the indicated concentrations are based on this form and are based on the substrate weight. C.I. stands for Color Index.

example 1

In a four-necked flask of 1 liter capacity, equipped with stirrer, internal thermometer, gas inlet tube and a 20 cm Vigreux column with Claisen bridge, 194.2 g Dimethyl terephthalate, 39.8 g of ethylene glycol, 96.6 g of 1,2-propylene glycol, 9.2 g of glycerol, 0.37 g anhydrous sodium acetate and 0.19 g Titantetraisopropylat submitted. Then it is with nitrogen rendered inert and heated to 165-167 ° C within half an hour. Within another 2.5 hours, the temperature is increased to 215-220 ° C. At about 165 ° C internal temperature begins the Transesterification and thus the distillation of methanol. After about 5 hours, more than 98% of them are too expected methanol distilled off. The batch is cooled to 80 ° C, then 72 g Methylpolyäthylenglykol 750, 91.2 g of methyl polyethylene glycol 1820 and 387.5 g of polyethylene glycol 1500 added. The flask is in turn rendered inert and heated to 200-220 ° C, then in Over the course of 1 hour the pressure is lowered to 1-5 mbar and at 220-240 ° C it will be another 2-5 hours condenses, wherein distilled off a mixture of ethylene glycol and 1,2-propylene glycol. To Completion of the condensation is vented with nitrogen and cooled. The product freezes when Cool to room temperature to a solid mass. Yield 730 g.

Analogously to Example 1, further oligoesters are prepared with the following starting materials:

Example 2

194,2 g Dimethylterephthalat

39,8 g Äthylenglykol

96,6 g 1,2-Propylenglykol

1,4 g Pentaerythrit

0,37 g Natriumacetat wasserfrei

0,19 g Titantetraisopropylat

72,0 g Methylpolyäthylenglykol 750

91,2 g Methylpolyäthylenglykol 1820

387,0 gPolyäthylenglykol 1500.

Ausbeute 725 g.

194.2 g of dimethyl terephthalate

39.8 g of ethylene glycol

96.6 g of 1,2-propylene glycol

1.4 g of pentaerythritol

0.37 g of sodium acetate anhydrous

0.19 g of titanium tetraisopropylate

72.0 g of methylpolyethylene glycol 750

91.2 g of methylpolyethylene glycol 1820

387.0 gpolyethylene glycol 1500.

Yield 725 g.

Example 3

145,6 g Dimethylterephthalat

109,0 g 1,2-Propylenglykol

1,4 g Mannit

0,28 g Natriumacetat wasserfrei

0,14 g Titantetraisopropylat

82,2 g Methylpolyäthylenglykol 750

581,3 g Polyäthylenglykol 3000.

Ausbeute 800 g.

145.6 g of dimethyl terephthalate

109.0 g of 1,2-propylene glycol

1.4 g mannitol

0.28 g of sodium acetate anhydrous

0.14 g of titanium tetraisopropylate

82.2 g of methylpolyethylene glycol 750

581.3 g of polyethylene glycol 3000.

Yield 800 g.

Example 4

194,2 g Dimethylterephthalat

39,8 g Äthylenglykol

96,6 g 1,2-Propylenglykol

6,0 g Trimethyloläthan

0,37 g Natriumacetat wasserfrei

0,19 g Titantetraisopropylat

54,0 g Methylpolyäthylenglykol 750

68,4 g Methylpolyäthylenglykol 1820

68,9 g Polyäthylenglykol 1500

129,2 g Polyäthylenglykol 800

258,3 g Polyäthylenglykol 3000.

Ausbeute 760 g.

194.2 g of dimethyl terephthalate

39.8 g of ethylene glycol

96.6 g of 1,2-propylene glycol

6.0 g of trimethylolethane

0.37 g of sodium acetate anhydrous

0.19 g of titanium tetraisopropylate

54.0 g of methylpolyethylene glycol 750

68.4 g of methylpolyethylene glycol 1820

68.9 g of polyethylene glycol 1500

129.2 g of polyethylene glycol 800

258.3 g of polyethylene glycol 3000.

Yield 760 g.

Example 5

223,3 g Dimethylterephthalat

45,7 g Äthylenglykol

111,1 g 1,2-Propylenglykol

1,6 g Pentaerythrit

0,42 g Natriumacetat wasserfrei

0,22 g Titantetraisopropylat

28,2 g Methylpolyäthylenglykol 750

35,7 g Methylpolyäthylenglykol 1820

445,6 g Polyäthylenglykol 1500.

Ausbeute 720 g.

223.3 g of dimethyl terephthalate

45.7 g of ethylene glycol

111.1 g of 1,2-propylene glycol

1.6 g of pentaerythritol

0.42 g of sodium acetate anhydrous

0.22 g of titanium tetraisopropylate

28.2 g of methylpolyethylene glycol 750

35.7 g of methylpolyethylene glycol 1820

445.6 g of polyethylene glycol 1500.

Yield 720 g.

Example 6

213,5 g Dimethylterephthalat

43,7 g Äthylenglykol

106,2 g 1,2-Propylenglykol

4,5 g Pentaerythrit

0,41 g Natriumacetat wasserfrei

0,21 g Titantetraisopropylat

39,6 g Methylpolyäthylenglykol 750

50,2 g Methylpolyäthylenglykol 1820

426,3 g Polyäthylenglykol 1500.

Ausbeute 720 g.

213.5 g of dimethyl terephthalate

43.7 g of ethylene glycol

106.2 g of 1,2-propylene glycol

4.5 g of pentaerythritol

0.41 g of sodium acetate anhydrous

0.21 g of titanium tetraisopropylate

39.6 g of methylpolyethylene glycol 750

50.2 g of methylpolyethylene glycol 1820

426.3 g of polyethylene glycol 1500.

Yield 720 g.

Example 7

174,7 g Dimethylterephthalat

19,0 g Äthylenglykol

107,5 g 1,2-Propylenglykol

3,3 g Trimethyloläthan

0,33 g Natriumacetat wasserfrei

0,17 g Titantetraisopropylat

83,8 g Methylpolyäthylenglykol 750

174,4 g Polyäthylenglykol 1500

348,8 g Polyäthylenglykol 3000.

Ausbeute 765 g.

174.7 g of dimethyl terephthalate

19.0 g of ethylene glycol

107.5 g of 1,2-propylene glycol

3.3 g of trimethylolethane

0.33 g of sodium acetate anhydrous

0.17 g of titanium tetraisopropylate

83.8 g of methylpolyethylene glycol 750

174.4 g of polyethylene glycol 1500

348.8 g of polyethylene glycol 3000.

Yield 765 g.

Example 8

194,2 g Dimethylterephthalat

39,8 g Äthylenglykol

96,6 g 1,2-Propylenglykol

1,0 g Glycerin

0,37 g Natriumacetat wasserfrei

0,19 g Titantetraisopropylat

226,5 g Anlagerungsprodukt von 80 Mol Äthylenoxyd an 1 Mol Talgfettalkohol

387,5 g Polyäthylenglykol 1500.

Ausbeute 800 g.

194.2 g of dimethyl terephthalate

39.8 g of ethylene glycol

96.6 g of 1,2-propylene glycol

1.0 g of glycerin

0.37 g of sodium acetate anhydrous

0.19 g of titanium tetraisopropylate

226.5 g of adduct of 80 moles of ethylene oxide with 1 mole of tallow fatty alcohol

387.5 g of polyethylene glycol 1500.

Yield 800 g.

Example 9

233,0 g Dimethylterephthalat

47,7 g Äthylenglykol

115,9 g 1,2-Propylenglykol

8,1 g 1,2,3-Hexantriol

0,44 g Natriumacetat wasserfrei

0,23 g Titantetraisopropylat

22,8 g n-Butylpolyäthylenglykol 200

465,0 g Polyäthylenglykol 1500

Ausbeute 700 g.

233.0 g of dimethyl terephthalate

47.7 g of ethylene glycol

115.9 g of 1,2-propylene glycol

8.1 g of 1,2,3-hexanetriol

0.44 g of sodium acetate anhydrous

0.23 g of titanium tetraisopropylate

22.8 g of n-butylpolyethylene glycol 200

465.0 g of polyethylene glycol 1500

Yield 700 g.

Example 10

291,2 g Dimethylterephthalat

59,7 g Äthylenglykol

144,9 g 1,2-Propylenglykol

310,0 g Polyäthylenglykol 800

123,3 g Methylpolyäthylenglykol 750

0,6 g Natriumacetat wasserfrei

0,3 g Titantctraisopropylat

Ausbeute 710g.

291.2 g of dimethyl terephthalate

59.7 g of ethylene glycol

144.9 g of 1,2-propylene glycol

310.0 g of polyethylene glycol 800

123.3 g of methylpolyethylene glycol 750

0.6 g of sodium acetate anhydrous

0.3 g of titanium octraisopropylate

Yield 710g.

Dispersion W1

337 parts of water are introduced and with stirring with 2.0 parts of xanthan gum (polysaccharide gum "Kelzan" from Kelco Biopolymers). After 6 hours there is a colloidal Solution, which is further diluted with 120 parts of water. Then under vacuum (300 mbar Residual pressure,) 40 parts of the oligoester prepared according to Example 1, in molten form (65-70 ° C) moved in. It forms a homogeneous, white, thick dispersion that during Stirring is continued for 1 hour. Then the vacuum is broken with nitrogen and it is still 1 part of biocide (1.5% aqueous solution of a 1/1 mixture of 5-chloro-2-methyl-4-isothiazolin-3-one Hydrochloride and 2-methyl-4-isothiazolin-3-one hydrochloride) is added, the pH is set to 7 (depending on the water quality with caustic soda or glacial acetic acid) and then unloaded.

Dispersion W2

The procedure is as described for the dispersion W1, with the difference that instead of the Oligoesters of Example 1, the same amount of the oligoester of Example 2 is used.

Dispersion W3

458.5 parts of water are introduced and with stirring with 0.5 parts of a partially hydrolyzed polyacrylamide (with an average molecular weight M _w = 20 x 10 ⁶ , with 27 ± 3 mol% CH ₂ -CH-COONa monomer units). Once a homogeneous solution is present (after about 12 hours), is heated to 50 ° C and 50 parts of the oligoester prepared according to Example 2 are added. A homogeneous, fine dispersion forms, which is cooled to room temperature and mixed with 1 part of the same biocide as in dispersion W1. Then unloaded.

Dispersion W4

From the oligoester prepared according to Example 3, an 8% aqueous dispersion is prepared, by introducing the water, the oligoester is melted, and the mixture is heated to 80 ° C with stirring, and as soon as a homogeneous dispersion is present, the dispersion is cooled to room temperature. Before unloading, 0.2% of the same biocide is still used added in the dispersion W1.

Dispersions W5 to W11

The procedure is as described for the dispersion W1, with the difference that instead of the Oligoesters of Example 1, the same amount of the oligoester of each of Examples 4 to 11 is used.

Dispersion W12

320.7 parts of ethylene glycol, 13.6 parts of diethanolamine and 12.9 parts of succinic anhydride allowed to react at 60 ° C for 3 hours. Then 7.2 parts of potassium hydroxide as well 334.5 parts Terephthalsäuredimethylester and 0.7 parts of manganese (II) acetate added as a catalyst. It is heated under nitrogen to 180 ° C, distilling off methanol and water. The The resulting reaction melt is cooled to 120 ° C, with 646.5 parts of polyethylene glycol-750 - monomethyläther reacted and heated under vacuum back to 180 ° C. After 2 hours at 180 ° C about 206.9 g of distillate are obtained. Then it is cooled to 120 ° C. One receives approx. 1000 parts melt of 120 ° C, resulting in a mixture of 3750 parts of water and 250 parts of Addition product of 10 moles of ethylene oxide to 1 mole of oleyl alcohol at 50 to 60 ° C was added become. It is then cooled to room temperature. This gives 5000 parts of aqueous Dispersion W12.

Application Example A [Dyeing of Polyester in Jet (Laborjet Mathis)]

A piece of polyester automotive velor is dyed on the Mathis Laborjet as follows: In the jet, the Containing 900 parts aqueous liquor and 1 g / l of dispersion W1, 90 parts of polyester velor entered. The fleet is added 0.62% C.I. Disperse Yellow 52, 2.3% C.I. Disperse Red 86, 0.5% C.I. Disperse Blue 77, 0.5 g / l of an anionic dispersant (formaldehyde condensate of sulfonated Naphthalene) and 0.5 g / l of a leveling agent (mixture of sulfonated aromatics), represents the pH with acetic acid to 4.5 to 5.0 and the liquor is heated at a rate of 1 ° C / min of Room temperature to 130 ° C and colors for 30 minutes at 130 ° C. Then it is at 70 ° C cooled and the bath is drained. In a fresh bath of 900 parts of water are added, 2 g / l Sodium hydrosulfite and 4 ml / 1 sodium hydroxide solution of 36 ° Bé, heated to 80 ° C and treated to reductive cleaning, while continuing for 20 minutes at this temperature. Subsequently, again cooled and rinsed twice with cold water. Then the fleet is drained, the goods unloaded and dried in the open air at room temperature. You get a dark red, even dyed goods with a homogeneous pole and with a very nice appearance.

Application Example B [Dyeing polyester microfiber jersey on the jet (Laborjet Mathis)]

A piece of polyester microfiber jersey is dyed on the Mathis Laborjet as follows: In the jet, the Containing 900 parts aqueous liquor and 1 g / l of dispersion W1, 90 parts of polyester microfiber jersey entered. The liquor is added 0.11% C.I. Disperse Yellow 52, 0.46% C.I. Disperse Red 86, 0.095% C.I. Disperse Blue 77 and 0.5 g / l of an anionic dispersant (formaldehyde condensate of sulfonated naphthalene), adjust the pH to 4.5-5.0 with acetic acid, heat the liquor at a rate of 1 ° C / min from room temperature to 130 ° C and stains for 15 minutes 130 ° C on. Then it is cooled again and rinsed twice with water. Then the fleet drained, the goods unloaded and dried in the open air at room temperature. You get a mouse gray, evenly colored goods with a soft handle and a very nice appearance.

Application Example C [Dyeing of Polyester / Cell Wool Blend with Disperse Dyes and Reactive Dyes in Jet (Laborjet Mathis)]

In 900 parts of an aqueous liquor heated to 50 ° C, the 1 part of dispersion W1 and 60 parts Sodium sulfate (Glauber's salt), 100 parts of polyester / rayon blended 70/30 are entered. Add a solution of 0.35 parts C.I. Reactive Blue 41 and 0.73 parts C.I. Reactive Green 12 in 50 parts of water too. After 20 minutes, add a solution of 1.5 parts soda 50 parts of water are added and it is dyed for a further 20 minutes at 50 ° C. Then one will Dispersion of 0.073 parts C.I. Disperse Yellow 54 and 0.53 parts C.I. Disperse Blue 60 in 50 parts of water are added to the bath and the pH of the bath is adjusted to 4.5-5.0 with acetic acid. It is then heated from 50 ° C to 130 ° C at a rate of 1.5 ° C / min. The coloring is carried out for another 45 minutes at 130 ° C and then the bath at a speed cooled from 2 ° C / min to 60 ° C. After completion in the usual way (rinsing, washing, Drying) gives a very level green color with a perfect appearance.

In an analogous manner as the dispersion W1, in the above Application Examples A, B and C the other dispersions W2 to W12 used.

Claims (15)

use of
(P _S ) water-dispersible or soluble polyesters
as a wet lubricant when treating textile piece goods with a textile treatment agent (T) from aqueous liquor under such conditions, which would otherwise favor the formation of creases and / or the occurrence of friction in or on the substrate in the textile substrate. Use according to claim 1, characterized in that (P _S ) is a polyester of difunctional compounds (D), and optionally monofunctional compounds (E) which are suitable for the end closure of the polyesters, and / or higher oligofunctional compounds (H) which are branched the polyesters are suitable. Use according to claim 1 or 2, characterized in that (P _S ) is a polyester (P _S ') which is self-dispersible or colloidally soluble in water. Use according to one of Claims 1 to 3, characterized in that (P _S ) is used in the form of an aqueous, concentrated preparation (W). Use according to claim 4, characterized in that (W) is an aqueous preparation which contains (P _S ) and
(G) a thickener,
is marked. Use according to claim 4 or 5, characterized in that (W), in addition to (P _s ) and optionally (G), at least one of the following components (X) a nonionic or anionic emulsifier or a mixture of nonionic and / or anionic emulsifiers, (Y) a pH adjusting agent and (Z) at least one formulation additive contains. Use according to one of claims 1 to 6, characterized in that (T) at least one Dye or at least one optical brightener. Use according to one of claims 1 to 7, in the dyeing or optical whitening of Textile material of polyester fibers, optionally mixed with other fibers, in jet dyeing machines. Use according to any one of claims 1 to 8, in the dyeing or optical whitening of Textile material of polyester microfibers, optionally in admixture with other fibers comparable fineness. Naßgleitmittel for dyeing or optical brightening of textile piece goods in extruded or tubular form from aqueous liquor under such conditions, which would otherwise favor the formation of creases or the occurrence of friction in or on the substrate in the textile substrate, characterized by a content of
(P _S ) a water-dispersible or soluble polyester.
as defined in any one of claims 1 to 3. Aqueous wet lubricant which is an aqueous preparation (W) as claimed in any one of claims 4 to 6 is defined. Aqueous wet lubricant (W) according to claim 11, consisting essentially of (P _S ) and water and optionally at least one of the additives (G), (X), (Y) and (Z). Process for treating textile piece goods in extruded or tubular form with a Textile treatment agent (T) from aqueous liquor, under such conditions otherwise in the textile Substrate the formation of creases or the occurrence of friction in or on the substrate would favor, characterized in that in the presence of a wet lubricant according to any one of claims 10 to 12. Aqueous polyester preparation (W '), consisting essentially of (P _S ), (G) and water and optionally at least one of the additives (X), (Y) and (Z), wherein (P _S ) as in one of claims 1 is defined to 3, (G) as defined in claim 5, and (X), (Y) and (Z) are as defined in claim 6. Aqueous polyester preparation (W ") according to claim 14 consisting essentially of (P _S '), (G) and water and additionally optionally one or more of the additives (Y) and / or (Z), in the form of aqueous dispersion or colloidal solution ,