Method of preparing aqueous solutions of copolymers

FIELD: chemistry.

SUBSTANCE: method is described for preparing aqueous solutions of copolymers, involving a fundamental step for copolymerisation of partially neutralised acrylic and maleic acid in the presence of hydrogen peroxide in amount of 2 to 4% of total mass of monomers at temperature ranging from 85 to 105°C in an aqueous medium, which is realised through gradual addition of an aqueous solution of hydrogen peroxide for 3 to 6 hours into an aqueous solution of partially neutralised maleic acid and simultaneous gradual addition of an aqueous solution of partially neutralised acrylic acid, or an aqueous solution of free acrylic acid, or aqueous solutions of free acrylic acid and a base, and subsequent addition of hydrogen peroxide for 30 to 60 minutes after completion of simultaneous addition of hydrogen peroxide and acrylic acid, and a step for pre-polymerisation by keeping the reaction mixture at polymerisation temperature, distinguished by that, the pre-polymerisation step is realised by keeping the reaction mixture at polymerisation temperature for 35 to 60 minutes, subsequent simultaneous addition of aluminium or potassium persulphate in amount ranging from 0.10 to 0.15% of total mass of monomers and subsequent keeping at polymerisation temperature for 45 to 90 minutes.

EFFECT: increased dispersion capacity of copolymers.

1 cl, 1 tbl, 8 ex

 

The invention relates to the chemistry of polymers, and in particular to a method for producing aqueous solutions of copolymers of acrylic and maleic acids and their alkali or ammonium salts, which are widely used as corrosion inhibitors, dispersing agents in the manufacture of synthetic detergents, paper processes, desalination and other industries.

A method of obtaining aqueous solutions of copolymers partially neutralized acrylic and maleic acids, which includes the main stage copolymerization of partially neutralized acrylic and maleic acid in the presence of a mixture of hydrogen peroxide and sodium persulfate or sodium perborate in an amount of 1-20% of the total weight of the monomers at a temperature of 90-150°C. (preferably at 105-115°C) in the aquatic environment and the stage of depolymerization. The main stage copolymerization is carried out by simultaneous gradual introduction for 3-6 h in an aqueous solution of partially neutralized maleic acid aqueous solution of a mixture of initiators and an aqueous solution free of acrylic acid. Stage depolymerization carried out by simultaneous introduction into the reaction mixture at the temperature of polymerization of the excess amount (about 3% of the total weight of monomers) of hydrogen peroxide in aqueous solution. P is after the end of the process usually add water or an aqueous solution of sodium hydroxide (US 5763553, C08F 30/04, 1998).

In this way we obtain aqueous solutions of copolymers with a pH of 7.5-8.5, the basic substance content of approximately 40%. The average molecular weight of the copolymers is about 20000. Dispersing ability of the copolymers judged by the volume of 0.25 M solution of calcium acetate, went to the titration until a steady turbidity 100 ml of a solution containing 10 ml of 2 M solution of sodium carbonate, in the presence of 1 g of the copolymer (or approximately 2.5 ml of 40%solution of the copolymer). The copolymers obtained by the above-described technology, have low dispersal ability, as went to the titration volume of a solution of calcium acetate is only 14-21 ml, which corresponds to 140-210 mg CA/g of copolymer.

The closest in technical essence and the achieved technical result of the proposed method is a method of obtaining aqueous solutions of copolymers that includes the main stage copolymerization of partially neutralized acrylic and maleic acid in the presence of hydrogen peroxide in the amount of 0.5-5.0% of the total weight of the monomers at a temperature of 60-150°C., preferably at 100-130°C) in the aquatic environment and the stage of depolymerization. The main stage copolymerization is carried out by the gradual introduction within 3-8 h in an aqueous solution of partially neutralized Malei the OIC acid aqueous solution of hydrogen peroxide and simultaneous gradual introduction of the aqueous solution of partially neutralized acrylic acid or an aqueous solution free of acrylic acid and the subsequent continuation of the the introduction of hydrogen peroxide within 1-3 h after joint injection of hydrogen peroxide and acrylic acid. Stage depolymerization carried out by keeping the reaction mixture at the polymerization temperature for 2 h (US 5175361, C07C 55/00, 1992).

In this way we obtain a solution of copolymer with a basic substance content 20-70% (mostly 40-60%) and degree of neutralization of the carboxyl groups in the copolymers 20-80% (mainly 30-70%). The residual maleic acid in the polymerization at a temperature of 100-120°C is 0.1 to 0.5%.

In method no data on the dispersing ability of the obtained solutions of the copolymers. To assess their dispersal abilities known method was reproduced in the conditions of example 7 from its description: as described in this patent technology is synthesized solution of a copolymer of 70% acrylic acid and 30% maleic acid and defined indicators. The resulting solution of the copolymer with a viscosity of a 20%aqueous solution of 44.0 JV contained: the main substance of 39.7%, residual monomers: acrylic acid is 0.05%of maleic acid - 0,34%. Index of molecular weight distribution of the copolymer is equal to 1.28. Dispersing ability of the copolymer is 2422 mg CA/g of copolymer.

The copolymer is not a high dispersing ability is rather broad molecular weight distribution.

The problem to which the invention is directed, is to increase the effectiveness of the solutions of the copolymers.

To solve this problem, a method for obtaining aqueous solutions of copolymers, including the main stage copolymerization of partially neutralized acrylic and maleic acid in the presence of hydrogen peroxide in the amount of 2-4% of the total weight of the monomers at a temperature of 85-105°C in a water environment, which is carried by the gradual introduction for 3-6 h in an aqueous solution of partially neutralized maleic acid aqueous solution of hydrogen peroxide and simultaneous gradual introduction of the aqueous solution of partially neutralized acrylic acid, or an aqueous solution free of acrylic acid, or aqueous solutions free of acrylic acid and base, and further introduction of hydrogen peroxide within 30-60 min after the end of the joint introduction of hydrogen peroxide and acrylic acid, and the stage of depolymerization by keeping the reaction mixture at the temperature of polymerization, characterized in that the stage of depolymerization carried out by keeping the reaction mixture at the temperature of polymerization within 35-60 min, the subsequent one-time injection of potassium persulfate or ammonium in the amount of 0.10-0.15% of the total mass of the monomial is s and subsequent aging at the temperature of polymerization within 45-90 minutes

The technical result that can be obtained by using the proposed invention is to increase the dispersing ability of the copolymers.

The proposed set of features that characterize the stage of depolymerization residual monomers, allows not only to obtain copolymers with a low content of residual monomers, but also affects the molecular weight distribution of the copolymers in the direction of its narrow and leads to unexpected jump (1.5-2 times) dispersing ability of the copolymers.

The invention is illustrated by the following examples.

Example 1.

In a reactor equipped with a fridge, two dosing devices, sleeve for measuring temperature, a jacket for heating and cooling and mixing device, download 7,94 parts by weight of maleic acid, 8,35 parts by weight of water and 10,95 parts by weight of 40%aqueous sodium hydroxide solution (degree of neutralization of the maleic acid is 90%). The main stage copolymerization carried out as follows. The contents of the reactor are heated to 95°C and slowly over 5 hours into it simultaneously injected through the first metering device 45,35 parts by weight of the neutralized solution of 30% acrylic acid, made from is 18.40 parts by weight of acrylic acid, 19,27 parts by weight of water and parts by weight of 7.68 40%in the aqueous solution of sodium hydroxide, and after the second dosing device - 2,19 parts by weight of a 20%aqueous solution of hydrogen peroxide (the first portion of the initiator). When the dosing of hydrogen peroxide and a solution of acrylic acid continue to dose within 60 min of 0.44 parts by weight of hydrogen peroxide solution (the second portion of initiator), (the total amount of hydrogen peroxide is 2% of the total mass of monomers). For depolymerization residual monomers, the reaction mixture was first incubated 40 min at the temperature of polymerization (first extract), then it is injected at a time of 0.04 parts by weight of potassium persulfate (0.15% of the total mass of monomers) and again incubated the mixture for 60 min at the temperature of polymerization (second extract). The resulting solution of copolymer is cooled to 25°C and hold for more neutralizing introduction 15,33 parts by weight of 40%aqueous sodium hydroxide solution (degree of neutralization of the carboxyl groups in the copolymer is 90%).

Get the solution of a copolymer with a basic substance content of 39.9%, viscosity of a 20%aqueous solution of 41.5 JV (viscometer of Brookfield LVF, rotor No. 1 at 60-1and the content of residual monomers, %: acrylic acid - 0,028, maleic acid - 0,173. Index of molecular weight distribution of the copolymer (MMP) is equal to 1.13. Dispersing ability of the copolymer is 3912 mg CA/g with the alimera.

Dispersing the ability to define a method, the essence of which lies in the titration of a solution of a copolymer solution of calcium acetate in the presence of sodium carbonate. For this, 10 ml of 0.1%aqueous solution of the copolymer is placed in a conical flask, add 1.0 ml of 10%aqueous sodium carbonate solution, 89 ml of water and, after thorough mixing octarepeat aqueous solution of calcium acetate with a concentration of 0.25 mol/l until a steady turbidity. By volume solution of calcium acetate, followed by titration, appreciate the dispersing ability of the copolymer, measured in mg of CA/g of copolymer.

Example 2.

The process is conducted as in example 1 with the following differences. On the main stage copolymerization into the reactor through the first metering device enter solution of acrylic acid, made from is 18.40 parts by weight of acrylic acid and 19,27 parts by weight of water, at the stage of depolymerization first exposure of the reaction mass should be performed within 60 min and further neutralization is carried out by introducing 23,0 parts by weight of 40%aqueous sodium hydroxide solution (degree of neutralization of the carboxyl groups in the copolymer is 90%). Properties of the obtained copolymer are shown in table.

Example 3

The process is conducted as in example 1 with the following differences. Charged to the reactor which 9.22 m is SC maleic acid, 13,34 parts by weight of water and 8,11 parts by weight of 30%aqueous ammonia solution. The contents of the reactor are heated to 85°C. gradually over 3 hours into it simultaneously injected through the first metering device 41,38 parts by weight of the neutralized solution of 30% acrylic acid, prepared from 17,12 parts by weight of acrylic acid, 20,22 parts by weight of water and 4.04 parts by weight of 30%aqueous ammonia solution, and after the second dosing device of 3.95 parts by weight of a 20%aqueous solution of hydrogen peroxide (the first portion of the initiator). The second portion of the initiator is injected in the amount of 1.32 parts by weight (the total amount of hydrogen peroxide, 4% of the total weight of the monomers). For depolymerization residual monomers, the reaction mixture was first incubated 45 min at the temperature of polymerization (first extract), then it is injected at a time 0,026 parts by weight of potassium persulfate (0.10% of the total weight of monomers) and again incubated mixture of 75 min at the temperature of polymerization (second extract). Additional neutralization of the resulting copolymer is conducted by introducing 8,08 parts by weight of 30%aqueous ammonia solution (degree of neutralization of the carboxyl groups in the copolymer is 90%). Properties of the obtained copolymer are shown in table.

Example 4

The process is conducted as in example 1 with the following differences. Charged to the reactor to 6.58 parts by weight of maleic to the slots, 1,01 parts by weight of water and 34,04 parts by weight of a 40%aqueous solution of potassium hydroxide (degree of neutralization of the maleic acid is 80%). The contents of the reactor are heated to 105°C and gradually over 5 hours into it simultaneously injected through the first metering device 35,13 parts by weight of the neutralized solution at 40% acrylic acid, prepared from 19,76 parts by weight of acrylic acid, 1,01 parts by weight of water and shed 15.37 parts by weight of a 40%aqueous solution of potassium hydroxide, and after the second dosing device - 3,29 parts by weight of a 20%aqueous solution of hydrogen peroxide (the first portion of the initiator). The second portion of the initiator is injected in the amount of 0.66 parts by weight (the total amount of hydrogen peroxide is 3% of the total mass of monomers). Additional neutralization of the resulting copolymer is conducted by introducing shed 15.37 parts by weight of a 40%aqueous solution of potassium hydroxide (degree of neutralization of the carboxyl groups in the copolymer is 80%). Properties of the obtained copolymer are shown in table.

Example 5

The process is conducted as in example 1 with the following differences. The contents of the reactor are heated to 90°C and gradually within 6 hours into it simultaneously with the solution of the neutralized acrylic acid through the second dosing device enter a 4.86 parts by weight of a 20%aqueous solution of hydrogen peroxide (the first portion of the initiator). The second portion of initiator in the W ill result in the number of 0.41 parts by weight of within 30 min (total number of hydrogen peroxide, 4% of the total weight of the monomers). If depolymerization residual monomers, the reaction mixture was first incubated for 35 min at the temperature of polymerization (first extract), then it is injected at a time of 0.03 parts by weight of ammonium persulfate (0.10% of the total weight of the monomers). Properties of the obtained copolymer are shown in table.

Example 6

The process is conducted as in example 1 with the following differences. Charged to the reactor to 6.58 parts by weight of maleic acid, 6.42 per parts by weight of water and parts by weight of 10.21 40%aqueous sodium hydroxide solution (degree of neutralization of the maleic acid is 90%). The contents of the reactor are heated to 100°C and gradually over 5 hours into it simultaneously injected through the first metering device solution of acrylic acid prepared from 19,76 parts by weight of acrylic acid and 18.6 parts by weight of water, and after the second dosing device - 3,44 parts by weight of a 20%aqueous solution of hydrogen peroxide (the first portion of the initiator). The second portion of the initiator is introduced into the number of parts by weight of 0.51 for 45 min (the total amount of hydrogen peroxide is 3% of the total mass of monomers). For depolymerization residual monomers, the reaction mixture was first incubated 45 min at the temperature of polymerization (first extract), then it is injected at a time of 0.045 wt is. of ammonium persulfate (0.15% of the total mass of monomers) and again incubated the mixture for 45 min at the temperature of polymerization (second extract). Additional neutralization of the resulting copolymer is conducted without pre-cooling the introduction 21,96 parts by weight of 40%aqueous sodium hydroxide solution (degree of neutralization of the carboxyl groups in the copolymer is 85%). Properties of the obtained copolymer are shown in table.

Example 7

The process is carried out in a reactor similar to example 1, only has three metering devices. The process is conducted as in example 1 with the following differences. Charged to the reactor which 9.22 parts by weight of maleic acid, 9,03 parts by weight of water and 14,31 parts by weight of 40%aqueous sodium hydroxide solution (degree of neutralization of the maleic acid is 90%). The contents of the reactor are heated to 85°C. gradually over 4 hours into it simultaneously injected through the first metering device 37,34 parts by weight solution of acrylic acid prepared from 17,12 parts by weight of acrylic acid and 20,22 parts by weight of water, through the second dosing device of 4.04 parts by weight of a 40%aqueous solution of sodium hydroxide and through third - 3,16 parts by weight of a 20%aqueous solution of hydrogen peroxide (the first portion of the initiator). The second portion of the initiator is injected in the amount of 0.79 parts by weight for 60 min (total peroxide, bodoro what amounts to 3% of the total weight of the monomers). If depolymerization residual monomers duration of the first aging the reaction mixture at the polymerization temperature is 45 minutes, the duration of the second 90 minutes of Additional neutralization of the resulting copolymer does not hold (degree of neutralization of the carboxyl groups in the copolymer is 60%). Properties of the obtained copolymer are shown in table.

Example 8 (prototype)

The process is carried out in a reactor as in example 1. Charged to the reactor 7,94 parts by weight of maleic acid, 8,35 parts by weight of water and 10,95 parts by weight of 40%aqueous sodium hydroxide solution (degree of neutralization of the maleic acid is 90%). The main stage copolymerization carried out as follows. The contents of the reactor are heated to 100°C and gradually over 5 hours into it simultaneously injected through the first metering device 45,35 parts by weight of the neutralized solution of 30% acrylic acid, made from is 18.40 parts by weight of acrylic acid, 19,27 parts by weight of water and 7.68 per parts by weight of a 40%aqueous solution of sodium hydroxide, and after the second dosing device of 9.55 parts by weight of 4,6%aqueous hydrogen peroxide solution (the first portion of the initiator). When the dosing solution of acrylic acid and hydrogen peroxide continue to dispense for up to 60 min 1,90 parts by weight of hydrogen peroxide solution (the second portion of initiator), (common to the quantity of hydrogen peroxide is 2% of the total mass of monomers). For depolymerization residual monomers, the reaction mixture was incubated for 120 min at the temperature of polymerization. Properties of the obtained copolymer are shown in table.

Table
The synthesis conditions and properties of the copolymers
IndexThe synthesis conditions for the examples
1234567Prototype
The main stage copolymerization
The ratio AK:MK70:3070:3065:3575:2570:3075:2565:3570:30
Neutralizing agentNaOHNaOHNH4OHKOHNaOHNOH NaOHNaOH
The degree of neutralization, %
AK30030403003030
MK9090908090909090
The temperature of copolymerization, °C9595851059010085100
The total number of H2O2, %224 34332
Time
AK and the first portion of the N2About2, h55356545
the second portions H2About2, min6060606030456060
Stage depolymerization
The first shutter speed min40604540354545 120
The initiator of polymerization, %
the potassium persulfate0,150,150,10,150,15
the ammonium persulfate0,10,15
The second shutter speed min60607560604590

td align="center"> 1
IndexThe properties of the copolymers according to examples
234567Prototype
The degree of neutralization of the copolymer, %9090908090856060
The content of the basic substance in solution, %39,941,239,941,540,039,938,736,2
Viscosity, SP41,5of 40.320,035,530,738,829,544
The content of residual monomers, %
AK0,0280,0100,0230,0120,0100,0150,0200,050
MK0,1730,1560,2100,0750,2270,0730,1290,340
Figure MMD1,131,161,081,101,121,111,151,28
Dispersing ability, mg CA/g of copolymer39123700481447924100411440022422

The method of obtaining aqueous solutions of copolymers, including the main stage of copolymere is then partially neutralized acrylic and maleic acid in the presence of hydrogen peroxide in the amount of 2-4% of the total weight of the monomers at a temperature of 85-105°C in a water environment, which is carried by the gradual introduction for 3-6 h in an aqueous solution of partially neutralized maleic acid aqueous solution of hydrogen peroxide and simultaneous gradual introduction of the aqueous solution of partially neutralized acrylic acid, or an aqueous solution free of acrylic acid, or aqueous solutions free of acrylic acid and base, and further introduction of hydrogen peroxide within 30-60 min after simultaneous administration of hydrogen peroxide and acrylic acid, and the stage of depolymerization by keeping the reaction mixture at the temperature of polymerization, characterized in that the stage of depolymerization carried out by keeping the reaction mixture at the temperature of polymerization within 35-60 min, the subsequent one-time introduction of potassium persulfate or ammonium in the amount of 0.10-0.15% of the total mass of the monomers and subsequent aging at the temperature of polymerization within 45-90 minutes



 

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4 cl, 1 tbl, 23 ex

FIELD: chemical industry, chemical technology, polymers.

SUBSTANCE: invention relates to a method for preparing aqueous polymer dispersions of the multipurpose designation. Method for preparing an aqueous dispersion of styrene-acryl copolymer is carried out by preliminary emulsifying a mixture of acrylic monomers with styrene in the presence of emulsifying agent and the following aqueous-emulsion co-polymerization of the reaction mixture in the presence of initiating agent. Monomer mixture comprises additionally acrylamide, and method involves using ammonium persulfate and hydrogen peroxide as an initiating agent. Method involves the successive fractionally dosing feeding ammonium persulfate for two stages followed by addition of a mixture of polymethylsiloxane of molecular mass 55-1000 Da and iron sulfate in their mass ratio = (25-35):1 to the reaction mixture at stirring, cooling the reaction mass and its neutralization to pH = 5-6. Invention provides preparing the stable aqueous polymeric dispersion with diminished size of particles. Invention provides enhancing strength and water resistance of film prepared on its base.

EFFECT: improved preparing method.

1 tbl, 3 ex

FIELD: polymer production.

SUBSTANCE: invention relates to a method for production of high-molecular weight water-soluble polymers used as flocculant at enterprises of water conditioning, petroleum processing, petrochemistry, iron and nonferrous metallurgy, paper-and-pulp, varnish-and-paint, chemical, and other industries. In particular, invention provides a method for production of high-molecular weight (meth)acrylic anionic flocculant via copolymerization of water-soluble anionic ethylenically unsaturated monomer with nonionic ethylenically unsaturated monomer, the former being salt of (meth)acrylic acids and the latter (meth)acrylic acid amide and ester at salt/amide/ester ratio 100:10:(1-6) or 100:(1-6):10. Proposed method leads to production of high-molecular weight (meth)acrylic anionic flocculant in the form of powder with nearly 100% content of principal substance, which is well dissolved in water.

EFFECT: enhanced efficiency in treatment of various disperse systems (industrial effluents).

3 cl, 4 tbl, 4 ex

FIELD: production of sheet organic glass on base of copolymers of methyl methacrylate by method of polymerization in block.

SUBSTANCE: proposed compound contains the following components, parts by mass: methyl methacrylate, 60-70; methacrylic acid, 10-20; 4-chloro-phenyl methacrylate or 2-,4-,6-trichloro-phenyl methacrylate or 2,3, 4, 5,6 pentachlorophenyl methacrylate, 15-25 and polymerization initiating agent, 0.0002-1.0 per 100 parts by mass of monomer mixture. Compound may additionally contain the following components per 100 parts by mass of monomer mixture, parts by mass: UV stabilizer, 0.01-2.0; UV absorber, 0.005-0.5; and cross-linking agent or their mixture, 0.05-10. Glass produced by proposed method is adaptable for glazing of aircraft and helicopters; it may be also used as structural material in shipbuilding, mechanical engineering, instrumentation engineering and other industries.

EFFECT: reduced water absorption; enhanced strength of sheet glass.

2 cl, 1 tbl, 24 ex

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention relates to copolymers consisting of monomers comprising acid groups with double bond and other hydrophobic monomeric component used in prophylaxis of inorganic and organic deposits in water-bearing systems. Invention describes a water-soluble copolymer comprising: (a) monoethylene-unsaturated monomers chosen from group consisting of monocarboxylic acids, dicarboxylic acids and sulfoacids that can be neutralized; (b) at least copolymerizable hydrophobic acrylic, monocyclic and/or bicyclic terpene comprising unsaturated double bond wherein terpene hydrocarbon is preferable, and copolymer is prepared by free-radical copolymerization of components (a) and (b) in an aqueous phase. Also, invention describes a method for synthesis of abovementioned copolymer and methods for its using. Invention provides synthesis of nontoxic copolymer used for prevention of deposits in water-bearing systems that can be easily prepared from available components and able to store for a long time without loss of activity.

EFFECT: improved preparing method, valuable properties of copolymers.

22 cl, 6 tbl, 6 ex

FIELD: polymer materials.

SUBSTANCE: invention relates to use scale formation polymer to prevent and to control formation of scale in water containing systems. Invention is directed to develop scale formation inhibiting labeled polymers, which can be detected in presence of such compounds as antioxidants or in non-regenerated oil. Invention proposes labeled copolymers wherein labeled units are derived from monomer of formula X2C=CYY', in which X, the same of different, represent hydrogen atom or С14-alkyl group, Y hydrogen atom or С14-alkyl group, Y' is group of formula -L-Arom with L being covalent bond or bivalent organic linking group optionally containing heteroatoms and Arom being a group including optionally substituted naphthalene, anthracene, or phenanthrene moiety. A composition containing above-defined polymers as well as a method for preventing and controlling formation of scale such polymers are also proposed.

EFFECT: enabled detection of proposed polymers in presence of other substances.

12 cl, 7 dwg, 5 tbl, 5 ex

FIELD: chemistry of polymers.

SUBSTANCE: invention describes polyelectrolytes synthesized by polymerization of (meth)acrylamide monomers quaternized (meth)acrylamide derivative, (meth)acrylic acid derivative and/or cationic monomers resistant to hydrolysis. Composition of polyelectrolytes is characterized by the following toxicity index: Fi = (Qtr-2QME)/10≤1 wherein Qtr is a general polymer charge; QME is part of monomer charge of ester type. Proposed polyelectrolytes are used for dehydration of cleared slimes, sewage treatment, preparing drinking water or for producing paper or cardboard.

EFFECT: valuable properties of polyelectrolytes.

15 cl, 4 tbl, 12 ex

FIELD: CHEMISTRY.

SUBSTANCE: invention relates to copolymer, which is simultaneously a binder and a rheology modifier for aqueous suspensions of pigments an/or mineral filling substances, and is used to produce granules of pigments and/or mineral filling substances. Granules are recovered and formed from elementary particles with specific surface area determined according to Brunauer-Emmet-Teller method withing 0.5 m2/g to 200 m2/g range, as defined in ISO standart 9277, granules, easily re-dispersed in thermoplastic resins, which consist of monomer units а), b), с) and d), sum of which is 100 percent by weight. The said invention relates to rheology modifier for aqueous suspension of pigmnets and/or mineral filling substances, which is also a binder, to viscosity-reducing agents for aqueous suspensions of pigments and/or mineral filling substances, which are also binders, to dispersing agent, which is also a binder, to application of the said copolymer, to granules of pigments and/or mineral filling substances, to application of the said granules and/or mineral filling substances in fields relating to fine powder use, to filled thermoplastic resin, to PVC-based resin and to polyolefin resin, obtained using the said granules and/or mineral filling substances, as well as to products made of such resin. Utilisation of the said copolymer provides for starting suspension viscosity control, when preparing agglomerated pigments and/or mineral filling substances, which can be easily re-dispersed in thermoplastic resins, PVC-based in particular. Recoverable granules of pigments and/or mineral filling substances obtained using the said copolymer are easily dispersable in plastic compositions, as well as in paint compositions.

EFFECT: lower cost of plastic and improved mechanical and temperature resistance thereof.

36 cl, 7 ex, 1 tbl

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