WO1987000543A1 - Process for the preparation of master batches of additives for polymer-based compositions, and products thus obtained - Google Patents

Process for the preparation of master batches of additives for polymer-based compositions, and products thus obtained Download PDF

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Publication number
WO1987000543A1
WO1987000543A1 PCT/EP1986/000428 EP8600428W WO8700543A1 WO 1987000543 A1 WO1987000543 A1 WO 1987000543A1 EP 8600428 W EP8600428 W EP 8600428W WO 8700543 A1 WO8700543 A1 WO 8700543A1
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WO
WIPO (PCT)
Prior art keywords
additives
wax
particles
weight
same
Prior art date
Application number
PCT/EP1986/000428
Other languages
French (fr)
Inventor
Luciano Scarso
Original Assignee
V.A.M.P. S.R.L.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by V.A.M.P. S.R.L. filed Critical V.A.M.P. S.R.L.
Publication of WO1987000543A1 publication Critical patent/WO1987000543A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
    • C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/10—Encapsulated ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2491/00—Characterised by the use of oils, fats or waxes; Derivatives thereof

Definitions

  • the present invention relates to a process for the preparation of "concentrates" (known to those skilled in
  • inhibitors are available as powders, which powders create, the most of the times, severe problems of environmental hygiene to the operators who must handle the same powders to the purpose
  • a purpose of the present invention is hence the provision of a simple and cheap process for the preparation of master batches of additives for compositions on the basis of polymers, which do not show the above said drawbacks, and hence eliminate any dangers of environmental pollution and therefore can be safely handled.
  • Another purpose of the invention is providing master batches of additives, for compositions on the basis, of polymers, which are free from powders, and having a high content of the same additives.
  • step (c) Adding the desired amount of at least one wax, in the molten state, and as of preceding step (b), to the micronized and homogenized additives contained in the mixer as of (a), such an addition of the wax being accomplished with stirring inside said mixer, in three individual steps comprising:
  • particles with controlled size can be selected by means of a normal vibrating screen.
  • the said master batch is characterized by a high concentration of additives, of the order of about 80-95% by weight, the residual 20-5% by weight being, represented by the wax as defined above.
  • Said wax is selected among the esters of montan wax, soaps of synthetic waxy acids, polyolefinic waxes, modified hydrocarbon waxes, esters of fatty acids, stearic acid, and amidic waxes.
  • the process according to the invention is particularly useful for preparing master batches on the basis of antimony trioxide (as f lame-retardant agents for compositions on the basis of polyvinyl chloride) and master batches on the basis of a mixture of antimony trioxide and of an organic halo- derivative, such as, e.g., decabromodi phenyI oxide (as f lame-retardant agents for polymeric compositions in general, and in particular for compositions on the basis of acrylonitri le-butadiene-styrene copolymers, known as ABS resins).
  • antimony trioxide as f lame-retardant agents for compositions on the basis of polyvinyl chloride
  • an organic halo- derivative such as, e.g., decabromodi phenyI oxide
  • ABS resins acrylonitri le-butadiene-styrene copolymers
  • the first ones of said master batches are constituted, for example, by about 88-92% by weight of antimony trioxide and by about 12-8% of glycerol monostearate, whi lst the second ones are constituted, always to exemplifying purposes, by about 8-12% by weight of a wax on the basis of bi s-ethy lene-stearamide and by about 92-88% by weight of a mixture, constituted in its turn by about 56-66% by weight of decabromodi pheny I oxide and by about 44-34% by weight of antimony trioxide.
  • said master batches can be a c comp I i ' shed, according to the process of the invention, with the most different additives, either individually, or as mixtures with one another (as flame- retardant agents, stabi lizers, dyes, pigments, inert and/or reinforcing inorganic fi llers, oxidation-inhibiting additives, and the like), said master batches being from time to time suitable to incorporate one or a plurality of said additives in the polymeric compositions based on the most different polymers, both thermoplastic and thermosett i ng in character, as well as in the elastomers, in artificial and synthetic fibres, -and in paints.
  • the so-obtained master batch of antimony trioxide is then discharged, said master batch appearing formed by dust-free and free-flowing spheroidal aggregates of average diameter of from 500 to 900 ⁇ m.
  • the above master batch results constituted by 90% by weight of antimony trioxide, and by 10% by weight of wax, said antimony trioxide resulting coated (practically "encapsulated") by said wax.
  • Said master batch demonstrates to be perfectly compatible with both rigid and plastified polyvinyl c loride.
  • Example 2 The run is carried out as in Example 2, but with the following variants: (1) in lieu of antimony trioxide alone, a mixture is used (in the same amount of 10 kg) of powders, constituted by 34% by weight of antimony trioxide and by 66% by weight of decabromodi phen I oxide. (2) in lieu of wax ' Hostalub FE2, a wax on the -basis of bis- ethy lene-stearami de (amidic wax HOSTALUB FA1 available from H0ECHST Co. of Frankfurt am Main), with melting point o 141 C is used.
  • a wax on the -basis of bis- ethy lene-stearami de (amidic wax HOSTALUB FA1 available from H0ECHST Co. of Frankfurt am Main), with melting point o 141 C is used.
  • the process can be performed by carrying out the related steps in continuous fashion, but always committing to the same steps the functions - in sequence - of "waxy wetting", “aggregation”, and “stabilization” of the particles of the hereinabove indicated additives, in such a case such steps being performed with a pr.oper programming of the amounts of molten wax to be added to the powder of the additive(s) destined to form the master batch of the invention.

Abstract

Process for the preparation of master batches of additives for compositions on the bases of polymers, as flame-retardant agents, stabilizers, oxidation inhibitors, dyes, pigments, antistatic additives, inert and/or reinforcing fillers and the like, of the type providing the coating and/or the blending of said additives (previously micronized) with inert and compacting substances, which process comprises the mixing, in at least two successive mixing steps, of at least one of said additives, previously micronized, with at least one molten wax, said wax having a melting point comprised within the range of approximately from 40oC to 160oC, and being moreover of such a nature as to result compatible both with said additives, and with polymers comprised in the polymeric composition into which the same additives are destined to be added as master batch, the first one of said mixing steps performing the function of accomplishing a thin film of wax wetting around the individual particles of said additives, and the further mixing step(s) performing the function of first accomplishing the aggregation of the wax-coated particles, as obtained above, as spheroidal particles of about 20 to 2000 mum in diameter, and of then accomplishing the stabilization of these latter particles into other end spheroidal particles of about 100 to 3000 mum in diameter, said end particles resulting free-flowing and dust-free. The master batches are characterized by very high concentrations of said additives (80-95%) and by being hygienically safe in the operations they are handled in.

Description

*
"PROCESS FOR THE PREPARATION OF MASTER BATCHES OF ADDITIVES FOR POLYMER-BASED COMPOSITIONS, AND PRODUCTS
10 THUS OBTAINED"
Techniιca<L_FiιeJ.d The present invention relates to a process for the preparation of "concentrates" (known to those skilled in
15 the art as "master batches") of additives for compositions on the basis of polymers.
§3£J£2I2___Q£__ .!__£ It is known that many additives intended for use in polymer-based compositions, such as stabilizers, oxidation
20 inhibitors, dyes, pigments, flame retardant agents, anti stati c' additi es, inorganic fillers, and the like, are available as powders, which powders create, the most of the times, severe problems of environmental hygiene to the operators who must handle the same powders to the purpose
25 of incorporating them into said compositions, due to the fact that the powders in question, either because- they are per se poisonous, or because they contain fractions constituted by very fine particles, unavoidingly contaminate the surrounding atmosphere, thus coming into
30 contact with the skin and the respiratory apparatus of said operators, with consequent severe detriment to their health.
Some of said powder show furthermore the drawback of yielding explosive mixtures with air, with consequent fire and explosion risks.
2i§£i2iyr2__2Ϊ__.__sll2__.lDϋSD__:i2D A purpose of the present invention is hence the provision of a simple and cheap process for the preparation of master batches of additives for compositions on the basis of polymers, which do not show the above said drawbacks, and hence eliminate any dangers of environmental pollution and therefore can be safely handled.
Another purpose of the invention is providing master batches of additives, for compositions on the basis, of polymers, which are free from powders, and having a high content of the same additives.
These and still further purposes which shall be clear for one skilled in the art from the following disclosure, are achieved by means of a process of the type providing the coating and/or the blending of said additives with inert and compacting substances, which process comprises, according to the present invention, the ixing, in at least two successive mixing steps, at least one of said additives, previously micronized, with at least a molten wax, said wax having a melting point comprised within the o o range of approximately from 40 C to 160 C, and being moreover of such a nature as to result compatible both with said additives, and with the polymers comprised in the polymeric composition into which the same additives are destined to be added in the form of master batch, the first one of said mixing steps performing the function of providing a thin fi lm of waxy wetting around the individual microparticles of said additives, and the further mixing step(s) performing the function of first accomplishing the aggregation of the wax-coated particles, as obtained above, as spheroidal particles of average diameter of approximately 20 to 2000 μm, and then accomplishing the stabi lization of these latter particles into other end spheroidal particles having an average diameter of approximately 100 to 3000 μm, said end particles resulting free-flowing and dust-free. §≤§!_•__.U d≤__ l_£ ££ iπ2_.2y____.i_ it-IDvent on A preferred, but not exclusive form of practical embodiment of the process of the present invention compri ses :
(a) Homogenizing, in the form of microparticles of about 1 to 5 μm in diameter, at least one of said additives, in a high-speed mixer, of known type;
(b) Melting, in a conventional melting equipment, a wax having a melting point comprised within the range of approximately from 40 C to 160 C, and of such a nature as to result, compatible both with the additives as of (a), and with the polymers comprised in the polymeric composition in which the same additives are destined to be added as master batch;
(c) Adding the desired amount of at least one wax, in the molten state, and as of preceding step (b), to the micronized and homogenized additives contained in the mixer as of (a), such an addition of the wax being accomplished with stirring inside said mixer, in three individual steps comprising:
Cc1) First adding about 5-30% by weight of the desired total amount of wax as of (c), the mass being then kept stirred for about 2 to 5 minutes, so to provide a first thin film of waxy wetting on the individual microparticles of said additives;
(c2) Then adding a second portion of wax, representing about 5 to 30% by weight of the desired total amount, the whole mass being then kept stirred for about 3 to 5 minutes, so to accomplish the aggregation of the microparticles obtained as under Cc1), as spheroidal particles of about 30 to 500 μm in diameter;
Cc3) Finally adding the residual amount of molten wax, the whole mass being then kept stirred for about 2 to 5 minutes, to the purpose of stabilizing the shape of particles obtained in (c2), the same being also brought to the desired end spheroidal size of about 500 to 900 μ , the same particles resulting free-flowing and dust-free, and thus constituting a "safe" and easily handeable master batch, ready to be incorporated into compositions on the basis of polymers.
Of course, as desired, particles with controlled size can be selected by means of a normal vibrating screen.
The said master batch is characterized by a high concentration of additives, of the order of about 80-95% by weight, the residual 20-5% by weight being, represented by the wax as defined above.
Said wax is selected among the esters of montan wax, soaps of synthetic waxy acids, polyolefinic waxes, modified hydrocarbon waxes, esters of fatty acids, stearic acid, and amidic waxes.
As it shall be exemplified hereunder, the process according to the invention is particularly useful for preparing master batches on the basis of antimony trioxide (as f lame-retardant agents for compositions on the basis of polyvinyl chloride) and master batches on the basis of a mixture of antimony trioxide and of an organic halo- derivative, such as, e.g., decabromodi phenyI oxide (as f lame-retardant agents for polymeric compositions in general, and in particular for compositions on the basis of acrylonitri le-butadiene-styrene copolymers, known as ABS resins). The first ones of said master batches are constituted, for example, by about 88-92% by weight of antimony trioxide and by about 12-8% of glycerol monostearate, whi lst the second ones are constituted, always to exemplifying purposes, by about 8-12% by weight of a wax on the basis of bi s-ethy lene-stearamide and by about 92-88% by weight of a mixture, constituted in its turn by about 56-66% by weight of decabromodi pheny I oxide and by about 44-34% by weight of antimony trioxide.
As it has already been evidenced, said master batches can be a c comp I i'shed, according to the process of the invention, with the most different additives, either individually, or as mixtures with one another (as flame- retardant agents, stabi lizers, dyes, pigments, inert and/or reinforcing inorganic fi llers, oxidation-inhibiting additives, and the like), said master batches being from time to time suitable to incorporate one or a plurality of said additives in the polymeric compositions based on the most different polymers, both thermoplastic and thermosett i ng in character, as well as in the elastomers, in artificial and synthetic fibres, -and in paints.
The following Examples, which are merely i llustrating and not limitative of the invention, shall serve to better explain the same invention.
(ComEaratiye2__EXAMPLE_l
Into a 20-litre vertical high-speed mixer, having stirring means equipped with two crossed blades, of known type ("Turbomi xer") , charged are, with stirring, 10 kg of powder of antimony trioxide and 1 kg of wax (in the molten state) on the basis of glycerol monostearate (Wax HOSTALUB FE2, with melting point 58 C, available from Hoechst Co. of Frankfurt am Main, FRG), to the purpose of preparing a master batch constituted by 90% by weight of antimony trioxide and by 10% by weight of said wax. The run must be discontinued after 2 minutes because of the blocking , of the stirrer blades, a shapeless, not homogeneous and highly viscous mass being formed, which hence does not allow the prefixed purpose to be achieved.
EXAMPLE_2
By using the same mixer of Example 1, charged into the same mixer are first 10 kg of powder of antimony trioxide (which are thus micronized and homogenized), and then 0.1 kg of molten HOSTALUB FE2 wax (the same as of Example 1), the whole being then kept stirred for 3 minutes. Into the same mixer a further 0.3 kg of the same molten wax as above is then added, always with stirring, which stirring is continued for further 5 minutes. At the end, always into the same mixer, the last 0.6 kg of said wax (in the molten state) is added, the mass being then kept stirred for further 4 minutes.
At the end, from the mixer the so-obtained master batch of antimony trioxide is then discharged, said master batch appearing formed by dust-free and free-flowing spheroidal aggregates of average diameter of from 500 to 900 μm.
As it can be inferred from the above reported data, the above master batch results constituted by 90% by weight of antimony trioxide, and by 10% by weight of wax, said antimony trioxide resulting coated (practically "encapsulated") by said wax.
Said master batch demonstrates to be perfectly compatible with both rigid and plastified polyvinyl c loride.
EXAMPLE_3
The run is carried out as in Example 2, but with the following variants: (1) in lieu of antimony trioxide alone, a mixture is used (in the same amount of 10 kg) of powders, constituted by 34% by weight of antimony trioxide and by 66% by weight of decabromodi phen I oxide. (2) in lieu of wax 'Hostalub FE2, a wax on the -basis of bis- ethy lene-stearami de (amidic wax HOSTALUB FA1 available from H0ECHST Co. of Frankfurt am Main), with melting point o 141 C is used.
The addition of this wax into the mixer is carried out by hot-head sprayer. At the end, a master batch having the form of spheroidal aggregates (average diameter 500 900 μm) is obtained, which results perfectly compatible with ABS resins ( ac ry Loni t ri le-butadi ene-st rene copolymers) .
In the above Examples 2 and 3, in each of them, one single type of wax has been used, but within the scope of the invention, in the various steps (d), (c2) and (c3), the use is also contemplated of a plurality of types of wax, as well as of mixtures of different waxes, according to as required. Of course, into the process of the invention, as it has been described above to exemplifying purposes, modifications and variants technically equivalent, but all within the protection scope of the same invention, can be introduced.
In particular, the process can be performed by carrying out the related steps in continuous fashion, but always committing to the same steps the functions - in sequence - of "waxy wetting", "aggregation", and "stabilization" of the particles of the hereinabove indicated additives, in such a case such steps being performed with a pr.oper programming of the amounts of molten wax to be added to the powder of the additive(s) destined to form the master batch of the invention.

Claims

C_L_A_I_M_S .1. Process for the preparation of master batches of additives for compositions on the basis of polymers, such as f lame-retardant agents, stabilizers, oxidation- inhibiting additives, dyes, pigments, antistatic additives, inert and/or reinforcing inorganic fi llers and the like, of the type providing the coating and/or the mixing of said additives with inert and compacting substances, characterized in that it comprises the mixing, in at least two subsequent mixing steps, of at least one of said additives, previously micronized, with at least one molten wax, said wax having a melting point comprised o o within the range of approximately from 40 C to 160 C, and being furthermore of such a nature as to result compatible both with said additives and with the polymers comprised in the polymeric composition to which the same additives are intended to be admixed in the form of master batch, the first one of said mixing steps performing the function of providing a thin fi lm of waxy wetting around the individual microparticles of said addi ives, and the further mixing step(s) performing the functoins of providing first the aggregation of the waxed particles, as obtained above, as spheroidal particles having an average diameter of about 20 to 2000 μm, and then the stabi lization of these latter particles into other end spheroi al particles having an average diameter of about
100 to 3000 μm, said end particles resulting free-flowing and dust-free.
2. Process according -to claim 1, characterized in that it comprises
(a) homogenizing, in the form of microparticles of about ' 1 to 5 μm in diameter, at least one of said additives, in a high-speed mixer, of known type;
(b) melting, in a conventional melting equipment, a wax having a melting point comprised within the range of approximately from 40 C to 160 C, and of such a nature as to result compatible both with the additives as of (a), and with the polymers comprised in the polymeric composition into which the same additives are intended for addition as master batch;
(c) Adding the desired amount of wax, in the molten state, and as of preceding step (b), to the micronized and homogenized additives contained in the mixer as of (a), such an addition of the wax being accomplished with stirring inside said mixer, in three individual steps compri sing:
(d) first adding about 5-30% by weight of the desired total amount of wax as of (c), the mass being then kept stirred for about 2 to 5 minutes, so to accomplish a first thin film of waxy wetting on the individual microparticles of said additives;
(c2) then adding a second portion of wax, representing about 5 to 30% by weight of the desired total amount, the whole mass being then kept stirred for about 3 to 5 minutes, so to accomplish the aggregation of the microparticles obtained as under (d), as spheroidal particles of about 30 to 500 μm in diameter;
(c3) finally adding the residual amount of molten wax, the whole mass being then kept stirred for about 2 to 5 minutes, to the purpose of stabilizing the shape of particles obtained in (c2), the same being also brought to the desired end spheroidal size of about 500 to 900 μm, the same particles resulting free-flowing and dust-free.
3. Process according to claim 1, characterized in that said master batches contain about 80-95% by weight of said additives, and about 20-5% by weight of said wax.
4. Process according to clai 1, characterized in that said wax is selected among the esters of montan wax, soaps of synthetic waxy acids, polyolefinic waxes, modified hydrocarbon waxes, 'esters of fatty acids, stearic acid, and amidic waxes.
5. Master batches of additives for compositions on the basis of polymers, of the type providing a coating of the same additives when these are in powder form, characterized in that
- said master batches have the form of aggregates of microparticles of said additives, the same microparticles having average size comprised within the range of from about 1 to 5 μm, and being individually coated by a thin fi lm of wax, which fi lm isolates and at the same time keeps the said microparticles assembled ith one another;
- that said aggregates are of spheroidal shape with average diameter comprised within the range of from about 100 to 3000 μm, they being coated in their turn by a wax fi lm which keeps individually compacted the same aggregates;
- that said wax is of such chemical nature as to result compatible both with the additive it goes to coat, and with the polymer into which the same additive is destined to be incorporated by addition accomplished by means of the said aggregates, the same master batches being constituted by about 80-95% of at least one of said additives and by about 20-5% of at least one wax;
- that said wax has a melting point comprised within the range of from 40 C to 160 C, it being selected from at least one of the following waxes: esters of montan wax, soaps of synthetic waxy acids, polyolefinic waxes, modified hydrocarbon waxes, esters of fatty acids, stearic acid, and amidic waxes.
6. Master batch according to claim 1, characterized in that it comprises about 92-88% by weight of antimony trioxide and about 8-12% by weight of glycerol monostearate.
7. Use of the master batch according to claim 6,. as flame-retardant additive for compositions on the basis of polyvinyl chloride.
8. Master batch according to claim 1, characterized in that it comprises about 8-12% by weight of a wax constituted by bi s-ethylene-stearami de, and about 92-88% by weight of a mixture, in its turn constituted by 56-66% by weight by an organic bromo-deri vati ve and by about 44- 34% by weight by antimony trioxide.
9. Use of the master batch according to claim 8, as flame-retardant additive for compositions on the basis of aeryloni tri le-butadi ene-styrene (ABS) copolymers.
PCT/EP1986/000428 1985-07-23 1986-07-22 Process for the preparation of master batches of additives for polymer-based compositions, and products thus obtained WO1987000543A1 (en)

Applications Claiming Priority (2)

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IT21677/85A IT1187702B (en) 1985-07-23 1985-07-23 PROCESS FOR THE PREPARATION OF CONCENTRATES OF ADDITIVES FOR POLYMER-BASED COMPOSITIONS, AND PRODUCTS SO OBTAINED
IT21677A/85 1985-07-23

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4975270A (en) * 1987-04-21 1990-12-04 Nabisco Brands, Inc. Elastomer encased active ingredients
FR2647800A1 (en) * 1989-05-31 1990-12-07 Organo Synthese Ste Fse Tris(2,4-di-tert-butylphenyl) phosphite having improved physical properties
FR2702929A1 (en) * 1993-03-24 1994-09-30 Flamel Tech Sa Matrix type microparticles containing at least one biocidal agent, process for their preparation and manufactured products containing them
WO2000063284A1 (en) * 1999-04-21 2000-10-26 Cognis Deutschland Gmbh Dust-free stabiliser compositions for plastics and a method for producing the same
EP1081716A1 (en) * 1999-09-06 2001-03-07 European Community (EC) Method for producing nuclear fuel pellets of the mox type
WO2002034817A1 (en) * 2000-10-17 2002-05-02 Cognis Deutschland Gmbh & Co. Kg Dust-free stabilizer compositions for plastic materials and method for the production thereof
WO2003099920A1 (en) * 2002-05-17 2003-12-04 Polyone Corporation Composition and method for improvement of resin flow in polymer processing equipment
FR2841155A1 (en) * 2002-06-20 2003-12-26 Bionatec Production of a cosmetic product comprises granulating a powder and agglomerating the granules with other granules
FR2873706A1 (en) * 2004-07-27 2006-02-03 Gaillon Soc Par Actions Simpli New dye or additive raw material (formed from granules) supplied to machines (extrusion or injection type) useful for converting thermoplastic or elastomeric material
WO2007081854A2 (en) * 2006-01-05 2007-07-19 General Electric Company Method for making compositions containing microcapsules and compositions made thereof

Citations (5)

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Publication number Priority date Publication date Assignee Title
DE2031445A1 (en) * 1970-06-25 1972-01-13 Metallgesellschaft Ag Polyvinyl halide stabiliser granulate prodn - by injecting molten waxy component into stabiliser dispersion under pressure
US3778288A (en) * 1971-11-15 1973-12-11 Coal Oil And Gas Corp Ltd Methods for preparing master batches of additive concentrates
FR2262098A1 (en) * 1974-02-22 1975-09-19 Hoechst Ag
US4230501A (en) * 1978-07-31 1980-10-28 Cities Service Company Pigments dispersible in plastics
GB2055115A (en) * 1979-06-14 1981-02-25 Wavin Bv Colouring composition for colouring polyvinyl chloride

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2031445A1 (en) * 1970-06-25 1972-01-13 Metallgesellschaft Ag Polyvinyl halide stabiliser granulate prodn - by injecting molten waxy component into stabiliser dispersion under pressure
US3778288A (en) * 1971-11-15 1973-12-11 Coal Oil And Gas Corp Ltd Methods for preparing master batches of additive concentrates
FR2262098A1 (en) * 1974-02-22 1975-09-19 Hoechst Ag
US4230501A (en) * 1978-07-31 1980-10-28 Cities Service Company Pigments dispersible in plastics
GB2055115A (en) * 1979-06-14 1981-02-25 Wavin Bv Colouring composition for colouring polyvinyl chloride

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4975270A (en) * 1987-04-21 1990-12-04 Nabisco Brands, Inc. Elastomer encased active ingredients
FR2647800A1 (en) * 1989-05-31 1990-12-07 Organo Synthese Ste Fse Tris(2,4-di-tert-butylphenyl) phosphite having improved physical properties
FR2702929A1 (en) * 1993-03-24 1994-09-30 Flamel Tech Sa Matrix type microparticles containing at least one biocidal agent, process for their preparation and manufactured products containing them
WO2000063284A1 (en) * 1999-04-21 2000-10-26 Cognis Deutschland Gmbh Dust-free stabiliser compositions for plastics and a method for producing the same
EP1081716A1 (en) * 1999-09-06 2001-03-07 European Community (EC) Method for producing nuclear fuel pellets of the mox type
WO2002034817A1 (en) * 2000-10-17 2002-05-02 Cognis Deutschland Gmbh & Co. Kg Dust-free stabilizer compositions for plastic materials and method for the production thereof
WO2003099920A1 (en) * 2002-05-17 2003-12-04 Polyone Corporation Composition and method for improvement of resin flow in polymer processing equipment
FR2841155A1 (en) * 2002-06-20 2003-12-26 Bionatec Production of a cosmetic product comprises granulating a powder and agglomerating the granules with other granules
FR2873706A1 (en) * 2004-07-27 2006-02-03 Gaillon Soc Par Actions Simpli New dye or additive raw material (formed from granules) supplied to machines (extrusion or injection type) useful for converting thermoplastic or elastomeric material
WO2007081854A2 (en) * 2006-01-05 2007-07-19 General Electric Company Method for making compositions containing microcapsules and compositions made thereof
WO2007081854A3 (en) * 2006-01-05 2007-09-13 Gen Electric Method for making compositions containing microcapsules and compositions made thereof

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IT1187702B (en) 1987-12-23
IT8521677A0 (en) 1985-07-23
EP0230439A1 (en) 1987-08-05

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