WO2002077359A1

WO2002077359A1 - Method for finishing fibres or nonwovens in an antimicrobial manner

Info

Publication number: WO2002077359A1
Application number: PCT/EP2002/002733
Authority: WO
Inventors: Maria De Moragas; Josep-Lluis Viladot Petit
Original assignee: Cognis Iberia S. L.
Priority date: 2001-03-22
Filing date: 2002-03-13
Publication date: 2002-10-03
Also published as: EP1243689A1

Abstract

The invention relates to a method for finishing fibres or nonwovens in an antimicrobial manner. The inventive method is characterised in that said fibres or nonwovens are treated with aqueous emulsions containing (a) microcapsules having an average diameter of between 1 and 1000 µm and consisting of gel-forming agents and antimicrobial active ingredients, and (b) oleaginous bodies.

Description

METHOD FOR ANTIMICROBIAL FINISHING OF FIBERS OR nonwovens

Field of the Invention

The invention is in the field of textile technology and relates to a process for finishing fibers and fabrics using special emulsions ("preparations"), fibers, fabrics and end products produced therefrom, which have been treated with these preparations and the use of the preparations for Finishing of fibers and fabrics.

State of the art

In the manufacture of hygiene articles, such as diapers or sanitary napkins, absorbent materials are used to absorb aqueous liquids. In order to prevent direct contact with the absorbent material when wearing and to increase comfort, this material is covered with a thin, water-permeable nonwoven. Such nonwovens are usually made from synthetic fibers, such as polyolefin or polyester fibers, since these fibers are inexpensive to produce, have good mechanical properties and, in the case of polyolefins, are thermally solidifiable.

The disadvantage is that the nonwovens used in hygiene articles are in direct skin contact and are therefore exposed to considerable bacterial contamination. In unfavorable cases, e.g. B. in high humidity, come to a considerable bacterial growth on the nonwoven surface. In the case of slight injuries to the skin surface, for example, this can lead to inflammation of the skin, which must be avoided.

A large number of writings are known from the prior art which deal with the equipment of hygiene articles. From the extensive literature, for example, WO 96/16682 (Procter & Gamble) and in particular US 3,585,998 (Hayford) are cited, which deal with diapers with a content of microcapsules which release the baby oil contained therein prior to application under mechanical pressure , Apart from the fact that the active ingredient trolled and released at once, this application does not solve the problem of bacterial growth on the nonwoven surface.

The object of the present invention was therefore to provide a process for the antimicrobial finishing of fibers, nonwovens and end products produced therefrom which reliably avoids the disadvantages of the prior art. In particular, it should be ensured that the active ingredient is not released suddenly, but in portions and with a time delay, so that the equipment is guaranteed over the entire duration of the wearing process. At the same time, a care effect should also be associated with the antimicrobial finish.

Description of the invention

The invention relates to a process for the antimicrobial finishing of fibers or nonwovens, especially those which consist entirely or predominantly of polyolefins or polyesters, which is characterized in that they are treated with aqueous emulsions

(a) microcapsules with an average diameter of 1 to 1000 microns, consisting of gel formers and antimicrobial agents and

(b) Oil body.

Surprisingly, it was found that the emulsions mentioned achieve the object on which the invention is based in an excellent manner. The active ingredients can be very finely distributed in the gel matrix, which leads to very small capsules, which in turn can be stably dispersed in the oil phase. In this way, the fibers and nonwovens can be treated very simply and evenly with the microcapsules containing the active ingredients. As a result, the equipment against bacterial growth is ensured due to the careful distribution and the large number of capsules over the entire wearing period. In the sense of the method according to the invention, in particular an effect against Staphylococcus aureus and Klebsiella pneumonia is achieved. The latter are responsible for pneumonia or inflammation of the urinary tract and often occur in older people who are incontinent and therefore have to use appropriate products for hygiene. The quality of the end products can be further improved by the use of antimicrobial agents that also have nourishing or other advantageous properties become. If the active ingredients are water-soluble substances, the majority of W / O emulsions are obtained; on the other hand, if the active ingredients are fat-soluble, multiple emulsions are formed, especially those of the O / W / O type. In a preferred embodiment of the invention, the emulsions contain

(a) 1 to 75, preferably 25 to 70 and in particular 30 to 50% by weight of microcapsules and

(b) 24 to 70, preferably 30 to 60 and in particular 40 to 50% by weight oil body

with the proviso that the quantities with water and possibly other auxiliary substances and additives add up to 100% by weight.

microcapsules

For the purposes of the invention, those substances which have the property of forming gels in aqueous solution at temperatures above 40 ° C. are preferably taken into account as gel formers for the production of the microcapsules. Typical examples are heteropolysaccharides and proteins. As thermogelating heteropolysaccharides, preference is given to agaroses, which in the form of the agar agar to be obtained from red algae can also be present together with up to 30% by weight of non-gel-forming agaropectins. The main constituent of the agaroses are linear polysaccharides from D-galactose and 3,6-anhydro-L-galactose, which are alternately linked by β-1,3- and β-1,4-glycosidic. The heteropolysaccharides preferably have a molecular weight in the range from 110,000 to 160,000 and are both colorless and tasteless. Alternatives are pectins, xanthans (also xanthan gum) and their mixtures. Preference is furthermore given to those types which still form gels in 1% by weight aqueous solution, which do not melt below 80 ° C. and solidify again above 40 ° C. The various types of gelatin from the group of thermogelating proteins are examples.

Typical examples of antimicrobial agents, such as those used in the area of hygiene products, are surfactants, emulsifiers, biogenic agents, deodorants and germ-inhibiting agents, and perfume oils. It can be seen by the person skilled in the art that the degree of antimicrobial activity varies with the substance groups mentioned. A lower effectiveness, however, may be offset by the additional nourishing properties. enside

Anionic, nonionic, cationic and / or amphoteric or amphoteric surfactants may be present as surface-active substances, the proportion of which in the compositions is usually about 1 to 70, preferably 5 to 50 and in particular 10 to 30% by weight. Typical examples of anionic surfactants are soaps, alkylbenzene sulfonates, alkane sulfonates, olefin sulfonates, alkyl ether sulfonates, glycerin ether sulfonates, α-methyl ester sulfonates, sulfo fatty acids, alkyl sulfates, fatty alcohol ether sulfates, glycerol ether sulfates, fatty acid ether sulfates, hydroxidic ether amide sulfates, hydroxymether amide sulfates, hydroxymether ether sulfates, hydroxymether ether sulfates, hydroxymether ether sulfates, sulfates, mono- and dialkyl sulfosuccinates, mono- and dialkyl sulfosuccinamates, sulfotriglycerides, amide soaps, ether carboxylic acids and their salts, fatty acid isethionates, fatty acid sarcosinates, fatty acid taurides, N-acylamino acids, such as, for example, acyl lactylates, acyl glutate fatty acid products, acyl glutate fatty acid products, acyl glutate fatty acid products, based on wheat) and alkyl (ether) phosphates. If the anionic surfactants contain polyglycol ether chains, they can have a conventional, but preferably a narrow, homolog distribution. Typical examples of nonionic surfactants are fatty alcohol polyglycol ethers, alkylphenol polyglycol ethers, fatty acid polyglycol esters, fatty acid amide polyglycol ethers, fatty amine polyglycol ethers, alkoxylated triglycerides, mixed ethers or mixed formals, optionally partially oxidized alk (en) yl oligoglycosides or especially fatty acid glucoric acid derivatives (GLCUs), glucoronic acid derivatives (GLCUs), glucoronic acid derivatives (GLCUs), and glucoronic acid derivatives (GLCU) Wheat-based products), polyol fatty acid esters, sugar esters, sorbita nests, polysorbates and amine oxides. If the nonionic surfactants contain polyglycol ether chains, they can have a conventional, but preferably a narrow, homolog distribution. Typical examples of cationic surfactants are quaternary ammonium compounds, such as, for example, dimethyldistearylammonium chloride, and esterquats, in particular quaternized fatty acid trialkanolamine ester salts. Typical examples of amphoteric or zwitterionic surfactants are alkyl betaines, alkyl amidobetaines, aminopropionates, aminoglycinates, imidazolinium betaines and sulfobetaines. The surfactants mentioned are exclusively known compounds. With regard to the structure and manufacture of these substances, reference is made to relevant reviews, for example, J.Falbe (ed.) _/ "Surfactants in Consumer Products" _/ Springer Verlag, Berlin, 1987, pp. 54-124 or J.Falbe (ed.) _/ "Catalysts, Surfactants and mineral oil additives ", Thieme Verlag, Stuttgart _/ 1978 _/ pp. 123-217. Typical examples of particularly suitable mild, ie particularly skin-compatible surfactants are fatty alcohol polyglycol ether sulfates, mo- noglyceride sulfates, mono- and / or dialkyl sulfosuccinates, fatty acid isethionates, fatty acid sarcosinates, fatty acid taurides, fatty acid glutamates, α-olefin sulfonates, ether carboxylic acids, alkyl oligoglucosides, fatty acid glucamides, alkyl amide betaines, or wheat protein base / amphoacetal fatty acids and amphoacetate proteins and preferably based on. Because of their mild biocidal action, cationic surfactants, especially those with an ester quat structure, are also frequently used.

mulgatoren

Examples of suitable emulsifiers are nonionic surfactants from at least one of the following groups: adducts of 2 to 30 mol of ethylene oxide and / or 0 to 5 mol of propylene oxide with linear fatty alcohols with 8 to 22 C atoms, with fatty acids with 12 to 22 C -Atoms, on alkylphenols with 8 to 15 carbon atoms in the alkyl group and alkylamines with 8 to 22 carbon atoms in the alkyl radical; Alkyl and / or alkenyl oligoglycosides with 8 to 22 carbon atoms in the alk (en) yl radical and their ethoxylated analogs; Addition products of 1 to 15 moles of ethylene oxide with castor oil and / or hardened castor oil; Addition products of 15 to 60 moles of ethylene oxide with castor oil and / or hardened castor oil; Partial esters of glycerol and / or sorbitan with unsaturated, linear or saturated, branched fatty acids with 12 to 22 carbon atoms and / or hydroxycarboxylic acids with 3 to 18 carbon atoms and their adducts with 1 to 30 mol ethylene oxide; Partial esters of polyglycerin (average degree of self-condensation 2 to 8), polyethylene glycol (molecular weight 400 to 5000), trimethylolpropane, pentaerythritol, sugar alcohols (e.g. sorbitol), alkyl glucosides (e.g. methyl glucoside, butyl glucoside, lauryl glucoside) and polyglucosides saturated with (eg and / or unsaturated, linear or branched fatty acids with 12 to 22 carbon atoms and / or hydroxycarboxylic acids with 3 to 18 carbon atoms and their adducts with 1 to 30 moles of ethylene oxide; Mixed esters of pentaerythritol, fatty acids, citric acid and fatty alcohol according to DE 1165574 PS and / or mixed esters of fatty acids with 6 to 22 carbon atoms, methyl glucose and polyols, preferably glycerol or polyglycerol; Mono-, di- and trialkyl phosphates and mono-, di- and / or tri-PEG-alkyl phosphates and their salts; Lanolin alcohol; Polysiloxane-polyalkyl-polyether copolymers or corresponding derivatives; Block copolymers, for example polyethylene glycol 30 dipolyhydroxystearate; Polymer emulsifiers, for example Pemulen types (TR-1, TR-2) from Goodrich; Polyalkylene glycols and glycerol carbonate. The adducts of ethylene oxide and / or of propylene oxide with fatty alcohols, fatty acids, alkylphenols or with castor oil are known, commercially available products. These are mixtures of homologs whose average degree of alkoxylation is the ratio of the amounts of ethylene oxide and / or propylene oxide and substrate, with which the addition reaction is carried out. Cι ₂ i ₈ fatty acid monoesters and diesters of adducts of ethylene oxide with glycerol are known from DE 2024051 PS as refatting agents for cosmetic preparations.

Alkyl and / or alkenyl oligoglycosides, their preparation and their use are known from the prior art. They are produced in particular by reacting glucose or oligosaccharides with primary alcohols with 8 to 18 carbon atoms. Regarding the glycoside residue, both monoglycosides in which a cyclic sugar residue is glycosidically bonded to the fatty alcohol and oligomeric glycosides with a degree of oligomerization of up to about 8 are suitable. The degree of oligomerization is a statistical mean value which is based on a homolog distribution customary for such technical products.

Typical examples of suitable partial glycerides are Hydroxystearinsäuremonogly- cerid, hydroxystearic acid diglyceride, isostearic acid, Isostearinsäu- rediglycerid, oleic acid monoglyceride, oleic acid diglyceride, Ricinolsäuremoglycerid, ricinoleic säurediglycerid, Linolsäuremonoglycerid, Linolsäurediglycerid, Linolensäuremo- noglycerid, Linolensäurediglycerid, Erucasäuremonoglycerid, Erucasäurediglycerid, Weinsäuremonoglycerid, Weinsäurediglycerid, Citronensäuremonoglycerid, citric nendiglyceride, malic acid monoglyceride, malic acid diglyceride and their technical mixtures, which may still contain minor amounts of triglyceride from the manufacturing process. Addition products of 1 to 30, preferably 5 to 10, mol of ethylene oxide onto the partial glycerides mentioned are also suitable.

As sorbitan sorbitan, sorbitan sesquiisostearate, sorbitan come tan diisostearate, sorbitan triisostearate, sorbitan monooleate, sorbitan Bitan dioleate, trioleate, Sorbitanmonoerucat, Sorbitansesquierucat, sorbitan dierucat, Sorbitantrierucat, Sorbitanmonoricinoleat, Sorbitansesquiricinoleat, sorbitan tandiricinoleat, Sorbitantriricinoleat, Sorbitanmonohydroxystearat, Sorbitansesqui - hydroxystearate, sorbitan dihydroxystearate, sorbitan trihydroxystearate, sorbitan mono-notartrate, sorbitan sesqui-tartrate, sorbitan ditartrate, sorbitan tritartrate, sorbitan monocitrate, sorbitan sesquicitrate, sorbitan dicitrate, sorbitan ntritrate Sorbitan sesquimaleate, sorbitan dimaleate, sorbitan trimaleate and their technical mixtures. Addition products of 1 to 30, preferably 5 to 10, mol of ethylene oxide onto the sorbitan esters mentioned are also suitable.

Typical examples of suitable polyglycerol esters are polyglyceryl-2 dipolyhydroxystearate (Dehymuls® PGPH), polyglycerol-3-diisostearate (Lameform® TGI), polyglyceryl-4 isostearate (Isolan® GI 34), polyglyceryl-3 oleate, diisostearoyl po- lyglyceryl-3 diisostearate (Isolan® PDI), polyglyceryl-3 methylglucose distearate (Tego Care® 450), polyglyceryl-3 beeswax (Cera Bellina®), polyglyceryl-4 caprate (polyglycerol caprate T2010 / 90), polyglyceryl-3 cetyl ether ( Chimexane® NL), Polyglycerγl-3 Distearate (Cremophor® GS 32) and Polyglyceryl Polyricinoleate (Admul® WOL 1403) Polyglyceryl Dimerate Isostearate and their mixtures. Examples of other suitable polyol esters are the mono-, di- and triesters of trimethylolpropane or pentaerythritol with lauric acid, coconut fatty acid, tallow fatty acid, palmitic acid, stearic acid, oleic acid, behenic acid and the like which are optionally reacted with 1 to 30 mol of ethylene oxide.

Typical anionic emulsifiers are aliphatic fatty acids with 12 to 22 carbon atoms, such as, for example, palmitic acid, stearic acid or behenic acid, and dicarboxylic acids with 12 to 22 carbon atoms, such as, for example, azelaic acid or sebacic acid.

Zwitterionic surfactants can also be used as emulsifiers. Zwitterionic surfactants are surface-active compounds that contain at least one quaternary ammonium group and at least one carboxylate and one sulfonate group in the molecule. Particularly suitable zwitterionic surfactants are the so-called betaines such as the N-alkyl-N, N-dimethylammonium glycinate, for example coconut alkyldimethylammonium glycinate, N-acylaminopropyl-N, N-dimethylammonium glycinate, for example coconut acylaminopropyldimethylammonium glycinate, and 2 -Alkyl-3-carboxylmethyl-3-hydroxyethylimidazolines each having 8 to 18 carbon atoms in the alkyl or acyl group and the cocoacylaminoethylhydroxyethylcarboxymethylglycinate. The fatty acid amide derivative known under the CTFA name Cocamidopropyl Betaine is particularly preferred. Suitable emulsifiers are ampholytic surfactants. Ampholytic surfactants are surface-active compounds which, apart from a _{C8 /} ι ₈ alkyl or acyl group, contain at least one free amino group and at least one -COOH or -SO ₃ H group and contain internal to form salts are capable. Examples of suitable ampholytic surfactants de are N-alkylglycines, N-alkylpropionic acids, N-alkylaminobutyric acids, N- alkyliminodipropionic acids, N-hydroxyethyl-N-alkylamidopropylglycines, N-

Alkyltaurines, N-alkyl sarcosines, 2-alkylaminopropionic acids and alkylamino acetic acids, each with about 8 to 18 carbon atoms in the alkyl group. Particularly preferred ampholytic surfactants are N-coconut alkyl aminopropionate, coconut acyl amino amino propionate and C ₁₂ _-8 acyl sarcosine. Finally, cationic surfactants are also suitable as emulsifiers, those of the esterquat type, preferably methylquaternized difatty acid triethanolamine ester salts, being particularly preferred.

> Bioqene active ingredients

Biogenic active ingredients include, for example, tocopherol, tocopherol acetate, tocopherol palmitate, ascorbic acid, deoxyribonucleic acid, retinol, imitation retinylpa, bisabolol, allantoin, phytantriol, panthenol, chitosan, menthol, tea tree oil, AHA acids, cojamide, pseudo acidic acids, amino acids, pentamino acids, amino acids To understand plant extracts and vitamin complexes.

> Deodorants and germicides

Cosmetic deodorants counteract, mask or eliminate body odors. Body odors arise from the action of skin bacteria on apocrine sweat, whereby unpleasant smelling breakdown products are formed. Accordingly, deodorants contain active ingredients which act as germ-inhibiting agents, enzyme inhibitors, odor absorbers or odor maskers.

In principle, all substances effective against gram-positive bacteria are suitable as germ-inhibiting agents, such as. B. 4-hydroxybenzoic acid and its salts and esters, N- (4-chlorophenyl) -N ^' - (3,4 dichlorophenyl) urea, 2,4,4' -Trichlor-2 '-hydroxy-diphenyl ether (triclosan), 4th -Chloro-3,5-dimethylphenol, 2,2'-methylene-bis (6-bromo-4-chlorophenol), 3-methyl-4- (l-methylethyl) phenol, 2-benzyl-4-chlorophenol, 3- (4-chlorophenoxy) -l, 2-propanediol, 3-iodo-2-propynylbutylcarbamate, chlorhexidine, 3,4,4'-trichlorocarbanilide (TTC), antibacterial fragrances, thymol, thyme oil, eugenol, clove oil, menthol, mint oil, farnesol , Phenoxyethanol, glycerol monolaurate (GML), Diglycerol monocaprinate (DMC), salicylic acid N-alkyl amides such as B. salicylic acid-n-octylamide or salicylic acid-n-decylamide.

Esterase inhibitors, for example, are suitable as enzyme inhibitors. These are preferably trialkyl citrates such as trimethyl citrate, tripropyl citrate, triisopropyl citrate, tributyl citrate and in particular triethyl citrate (Hydagen® CAT, Henkel KGaA, Düsseldorf / FRG). The substances inhibit enzyme activity and thereby reduce odor. Other substances which can be considered as esterase inhibitors are sterol sulfates or phosphates, such as, for example, lanosterol, cholesterol, campesterol, stigmasterol and sitosterol sulfate or phosphate, dicarboxylic acids and their esters, such as, for example, glutaric acid, glutaric acid mono- noethyl ester, glutaric acid diethyl ester, adipic acid, adipic acid monoethyl ester, adipic acid diethyl ester, malonic acid and malonic acid diethyl ester, hydroxycarboxylic acids and their esters such as citric acid, malic acid, tartaric acid or tartaric acid diethyl ester and zinc glycinate.

Suitable odor absorbers are substances that absorb odor-forming compounds and can retain them to a large extent. They lower the partial pressure of the individual components and thus also reduce their speed of propagation. It is important that perfumes must remain unaffected. Odor absorbers are not effective against bacteria. They contain, for example, a complex zinc salt of ricinoleic acid or special, largely odorless fragrances, which are known to the person skilled in the art as "fixators", such as, for example, the main component. B. extracts of Labdanum or Styrax or certain abietic acid derivatives. Fragrance agents or perfume oils act as odor maskers and, in addition to their function as odor maskers, give the deodorants their respective fragrance. Perfume oils are, for example, mixtures of natural and synthetic fragrances. Natural fragrances are extracts of flowers, stems and leaves, fruits, fruit peels, roots, woods, herbs and grasses, needles and branches as well as resins and balms. Animal raw materials, such as civet and castoreum, are also suitable. Typical synthetic fragrance compounds are products of the ester, ether, aldehyde, ketone, alcohol and hydrocarbon type. Fragrance compounds of the ester type are, for example, benzyl acetate, p-tert-butylcyclohexyl acetate, linalyl acetate, phenylethyl acetate, linalyl benzoate, benzyl formate, allyl cyclohexyl propionate, styrallyl propionate and benzyl salicylate. The ethers include, for example, benzyl ethyl ether, the aldehydes, for example, the linear alkanals having 8 to 18 carbon atoms, citral, citronellal, citronellyloxyacetalde- hyd, cyclamenaldehyde, hydroxycitronellal, lilial and bourgeonal, the ketones, for example, the jonones and methylcedryl ketone, the alcohols anethole, citronellol, eugenol, isoeugenol, geraniol, linalool, phenylethyl alcohol and terpineol, the hydrocarbons mainly include the terpenes and balsams. However, preference is given to using mixtures of different fragrances which together produce an appealing fragrance. Essential oils of lower volatility, which are mostly used as aroma components, are also suitable as perfume oils, e.g. sage oil, chamomile oil, clove oil, lemon balm oil, mint oil, cinnamon leaf oil, linden blossom oil, juniper berry oil, vetiver oil, oliban oil, galbanum oil, labdanum oil and lavandin oil. Bergamot oil, dihydromyrcenol, lilial, lyral, citronellol, phenylethyl alcohol, α-hexylcinnamaldehyde, geraniol, benzylacetone, cyclamenaldehyde, linalool, boisambrene forte, ambroxan, indole, hedione, sandelice, lemon oil, manidinenlylamine oil, cyclone oil, orange aldol oil, orange glycolate, orange oil, are preferred , Muscatel sage oil, ß-damascone, geraniu oil bourbon, cyclohexyl salicylate, Vertofix Coeur, Iso-E-Super, Fixolide NP, evernyl, iraldein gamma, phenylacetic acid, geranyl acetate, benzyl acetate, rose oxide, romilate, irotyl and floramate alone or in mixtures , used.

arfümöle

Mixtures of natural and synthetic fragrances may be mentioned as perfume oils with weakly antimicrobial properties. Natural fragrances are extracts of flowers (lily, lavender, roses, jasmine, neroli, ylang-ylang), stems and leaves (geranium, patchouli, petitgrain), fruits (anise, coriander, caraway, juniper), fruit peel (bergamot, lemon, Oranges), roots (mace, angelica, celery, cardamom, costus, iris, calmus), wood (pine, sandal, guaiac, cedar, rosewood), herbs and grasses (tarragon, lemongrass, sage, thyme), Needles and twigs (spruce, fir, pine, mountain pine), resins and balms (galbanum, elemi, benzoin, myrrh, olibanum, opoponax). Animal raw materials, such as civet and castoreum, are also suitable. Typical synthetic fragrance compounds are products of the ester, ether, aldehyde, ketone, alcohol and hydrocarbon type. Fragrance compounds of the ester type are, for example, benzyl acetate, phenoxyethyl isobutyrate, p-tert-butylcyclohexyl acetate, linalyl acetate, dimethylbenzylcarbinyl acetate, phenylethyl acetate, linalyl benzoate, benzyl formate, ethyl methylphenyl glycinate, allyl cyclohexyl benzylatepylpropionate, stylate propylate, stylate propionate. The ethers include, for example, benzyl ethyl ether, the aldehydes, for example hyden, for example, the linear alkanals with 8 to 18 carbon atoms, citral, citronellal, citronellyloxyacetaldehyde, cyclamenaldehyde, hydroxycitronellal, lilial and bourgeonal, to the ketones, for example the jonones, oc-isomethylionone and methylcedrylketone, to the alcohols anethole, citronelloeolene, eugenol, eugenol, eugenol, eugenol , Linalool, phenylethyl alcohol and terpineol, the hydrocarbons mainly include the terpenes and balsams. However, preference is given to using mixtures of different fragrances which together produce an appealing fragrance. Essential oils of lower volatility, which are mostly used as aroma components, are also suitable as perfume oils, for example sage oil, chamomile oil, clove oil, lemon balm oil, mint oil, cinnamon leaf oil, linden blossom oil, juniper berry oil, vetiver oil, oliban oil, gallan oil, labolane oil and lavandin oil. Bergamot oil, dihydromyrcenol, lilial, lyral, citronellol, phenylethyl alcohol, α-hexylcinnamaldehyde, geraniol, benzylacetone, cyclamenaldehyde, linalool, boisambrene forte, ambroxan, indole, hedione, sandelice, lemon oil, mandarin oil, allyl glycolate, allyl glycolate, allyl glycolate, orangelol oil, orangol oil, are preferred , Lavandin oil, muscatel sage oil, ß-damascone, geranium oil bourbon, cyclohexyl salicylate, Vertofix Coeur, Iso-E-Super, Fixolide NP, evernyl, iraldein gamma, phenylacetic acid, geranyl acetate, benzyl acetate, rose oxide, romilllate, irotyl and floramate alone Mixtures used.

The active compounds can be used in amounts such that the microcapsules have a content of 5 to 60, preferably 10 to 50 and in particular 15 to 25% by weight.

oil body

Guerbet alcohols based on fatty alcohols having 6 to 18, preferably 8 to 10 carbon atoms, esters of linear C ₆ -C ₂₂ fatty acids with linear or branched C ₆ -C ₂₂ fatty alcohols or esters of branched Cβ-Ci carboxylic acids are examples of oil bodies with linear or branched C ₆ -C ₂₂ fatty alcohols, such as myristyl myristate, myristyl palmitate, myristyl stearate, myristyl isostearate, myristyl oleate, myristyl behenate, myristyl erucate, cetyl myristate, cetyl palmitate, cetyl stearate, cetyl isyl stearate, cetyl isyl stearate, cetyl isyl styrene, , Stearyl stearate, stearyl isostearate, stearyl oleate, stearyl behenate, stearyl erucate, isostearyl myristate, isostearyl palateate, isostearyl stearate, isostearyl isostearate, isostearyl oleate, isostearyl behenate, isostearyl stolate, isostearyl isolate, , Behenyl palmitate, behenyl stearate, behenyl isostearate, Behenyl oleate, behenyl behenate, behenylerucate, erucyl myristate, erucyl palmitate, erucyl stearate, erucyl isostearate, erucyl oleate, erucyl behenate and erucyl erucate. Also suitable are esters of linear C ₆ -C ₂₂ fatty acids with branched alcohols, especially 2-ethyl hexanol, esters of C ₁₈ -C ₃₈ alkyl hydroxycarboxylic acids with linear or branched C ₆ -. C ₂₂ fatty alcohols (cf. DE 19756377 Al ), in particular dioctyl malates, esters of linear and / or branched fatty acids with polyhydric alcohols (such as propylene glycol, dimer diol or trimer triol) and / or Guerbet alcohols, triglycerides based on Cs-Cio fatty acids, liquid mono- / di- / triglyceride mixtures based on C ₆ -C ₈ fatty acids, esters of C ₆ -C ₂₂ fatty alcohols and / or Guerbet alcohols with aromatic carboxylic acids, in particular benzoic acid, esters of C ₂ -C ₂ dicarboxylic acids with linear or branched alcohols with 1 to 22 carbon atoms or polyols with 2 to 10 carbon atoms and 2 to 6 hydroxyl groups, vegetable oils, branched primary alcohols, substituted cyclohexanes, linear and branched C ₆ -C ₂₂ fatty alcohol carbonates, such as e.g. dicaprylyl carbonates (Cetiol® CC), Guerbet carbonates based on fatty alcohols with 6 to 18, preferably 8 to 10 C atoms, esters of benzoic acid with linear and / or branched C ₆ -C ₂₂ alcohols (e.g. Finsolv® TN), linear or branched, symmetrical or asymmetrical dialkyl ethers with 6 to 22 carbon atoms per alkyl group, such as, for example, dicaprylyl ether (Cetiol® OE), ring opening products of epoxidized fatty acid esters with polyols, silicone oils (cyclomethicones, silicon methicone types, etc.) and / or aliphatic or naphthenic hydrocarbons, such as squalane, squalene or dialkylcyclohexanes.

To prepare the emulsions, it is advisable to promote the encapsulation of the active ingredients in the gel matrix by elevated temperatures, for example from 50 to 95 and in particular 60 to 80 ° C. After stirring, it has also proven to be advantageous to leave the preparations to themselves for a period of 15 to 20 minutes. You can then enter the desired amount in the oil phase. The emulsions can then be used in amounts of active substance of 0.1 to 10, preferably 0.2 to 5 and in particular 0.5 to 2% by weight, based on the weight of the fiber or nonwoven.

Ausrüstunqsprodukte

Polyolefin fibers are one of the most common fibers used to manufacture nonwovens. Examples of suitable polyolefins are polypropylene, polyethylene or copolymers of ethylene or propylene with butadiene. Furthermore, polyester fibers, mainly polyethylene terephthalate fibers used. In addition to the types of fibers mentioned, other synthetic fibers suitable for producing nonwovens can also be used, for example fibers made of ^Nylon® . Fibers consisting of two or more components, for example polyester-copolyester fibers or polypropylene-polyethylene fibers, are also particularly suitable.

The nonwovens used in the process according to the invention can be produced by all processes of nonwoven production known in the prior art, as described, for example, in Ullmann's Encyclopedia of Industrial Chemistry, Vol. A 17, VCH Weinheim 1994 _/ pages 572-581. Nonwovens which are produced either by the so-called “dry laid” method or by spunbonding or spunbonding are preferred. The “dry Iaid ^λ” method is based on staple fibers which are usually separated into individual fibers by carding and then used of an aerodynamic or hydrodynamic process to form an unconsolidated nonwoven. This is then combined, for example, by a thermal treatment to form the finished nonwoven (the so-called "thermobonding"). The synthetic fibers are either heated to such an extent that their surface melts and the individual fibers are joined together at the contact points, or the fibers are coated with an additive that melts during the heat treatment and thus connects the individual fibers together. The connection is fixed by cooling. In addition to this process, all other processes which are used in the prior art for connecting nonwovens are of course also suitable.

Spunbond formation, on the other hand, starts from individual filaments which are formed by the melt spinning process from extruded polymers which are pressed through spinnerets under high pressure. The filaments emerging from the spinnerets are bundled, stretched and laid down to form a nonwoven, which is usually consolidated by "thermobonding". The process according to the invention is particularly suitable for nonwovens which are produced by the spunbonded or the "dry Iaid" process.

These aqueous emulsions ("preparations") are applied to the untreated nonwoven fabric or the fibers by the process according to the invention. For this purpose, all methods and machines customary in textile technology, for example a foulard, can be used, but spraying or roller application or pin application is also possible. The fibers or nonwovens are then dried and processed Another object of the invention therefore relates to antimicrobial fibers which consist wholly or predominantly of polyolefins or polyesters or nonwovens which predominantly contain such fibers and which are characterized in that they are produced by finishing with the aqueous emulsions. The finishing can be carried out by coating the emulsions (active substance) in amounts of 0.1 to 10% by weight, based on the weight of the fibers or nonwovens.

The invention also relates to hygiene products, such as feminine hygiene articles, diapers or wipes, which are distinguished by the fact that they contain the nonwovens finished as explained above.

A final object of the invention finally relates to the use of aqueous emulsions containing

(a) microcapsules with an average diameter of 1 to 1000 microns, consisting of gelling agents and active ingredients and

(b) Oil body

For the antimicrobial finishing of fibers or nonwovens that contain all or predominantly polyolefins or polyester.

Examples

Example 1. In a 500 ml three-necked flask with stirrer and reflux condenser, 10 g of agar were dissolved in 100 ml of water at the boiling point. The mixture was then cooled to 60 ° C. and 2 g of chitosan (Hydagen® DCMF, Cognis Deutschland GmbH) were added with vigorous stirring over the course of about 30 minutes. The preparation was left to stand for 15 minutes, concentrated in vacuo to a volume of 50 ml and then stirred into 150 ml of Capryl / Caprylyl Glycerides (Myritol® 318, Cognis Deutschland GmbH). An O / W / O emulsion was obtained which had a microcapsule content of 6% by weight. The microcapsules had an average diameter of 92 μm.

Example 2. In a 500 ml three-necked flask with stirrer and reflux condenser, 5 g of agar were dissolved in 100 ml of water at the boiling point. The mixture was then cooled to 60 ° C. and 15 g of a 90% strength by weight solution of dicapryloylmethylethoxymonium methosulfate in isopropyl alcohol were added over the course of about 30 minutes with vigorous stirring. The preparation was left to do for 15 minutes, concentrated in vacuo to a volume of 50 ml and then stirred into 150 ml of dicaprylyl ether (Cetiol® OE, Cognis Deutschland GmbH). An O / W / O emulsion was obtained which had a microcapsule content of 3% by weight. The microcapsules had an average diameter of 90 μm.

Example 3. In a 500 ml three-necked flask with a stirrer and reflux condenser, 10 g of agar were dissolved in 100 ml of water at the boiling point. The mixture was then cooled to 60 ° C. and 2 g of thymol were added over the course of about 30 min with vigorous stirring. The preparation was left to stand for 15 minutes, concentrated in vacuo to a volume of 50 ml and then stirred into 150 ml of cocoglycerides (Myritol® 312, Cognis Deutschland GmbH). An O / W / O emulsion was obtained which had a microcapsule content of 6% by weight. The microcapsules had an average diameter of 90 μm.

Example 4. In a 500 ml three-necked flask equipped with a stirrer and reflux condenser, 10 g of gelatin were dissolved in 100 ml of water at the boiling point. The mixture was then cooled to 60 ° C. and 2 g of glycerol monolaurate were added over the course of about 30 minutes, with vigorous stirring. The preparation was left to do for 15 minutes, concentrated in vacuo to a volume of 50 ml and then poured into 150 ml of almond oil. stir. A W / O emulsion was obtained which had a microcapsule content of 5.5% by weight. The microcapsules had an average diameter of 93 μm.

Claims

claims

1. A process for the antimicrobial finishing of fibers or nonwovens, characterized in that they are treated with aqueous emulsions containing

(b) Oil body.

2. The method according to claim 1, characterized in that the fibers or nonwovens consist entirely or predominantly of polyolefins and / or polyesters.

3. Process according to claims 1 and / or 2, characterized in that W / O or O / W / O emulsions are used.

4. The method according to at least one of claims 1 to 3, characterized in that emulsions are used which

(a) 1 to 75% by weight of microcapsules and

(b) 24 to 70% by weight oil body

with the proviso that the quantities with water and possibly other auxiliaries and additives add up to 100% by weight.

5. The method according to at least one of claims 1 to 4, characterized in that they contain antimicrobial agents which are selected from the group formed by surfactants, emulsifiers, biogenic agents, deodorants, germ-inhibiting agents and perfume oils.

6. The method according to at least one of claims 1 to 5, characterized in that the emulsions in amounts of 0.1 to 10 wt .-% - based on the fiber or nonwoven fabric weight - used.

7. Antimicrobial finished fibers which consist entirely or predominantly of polyolefins or polyesters or nonwovens which predominantly contain such fibers, characterized in that they are produced by a method according to one of claims 1 to 5.

8. Fibers or nonwovens according to claim 7, characterized in that they are equipped with a coating of the emulsions (active substance) in amounts of 0.1 to 10 wt .-% - based on the fiber or nonwoven weight.

9. hygiene products, such as feminine hygiene articles, diapers or wipes, characterized in that they contain nonwovens according to claim 7.

10. Use of aqueous emulsions containing

(b) Oil body