Single-component anhydrous coating composition for sealing building structures and flat roofs

FIELD: chemistry.

SUBSTANCE: disclosed is a single-component anhydrous coating composition based on silane-modified polymers, consisting of (wt %) a mixture of polyoxypropylene products with a terminal methoxy-alkyl-silane group with controlled viscosity (20-50), chalk powder (30-70), drying agents (0.5-5), curing agents (0.1-5), adhesion accelerator (0.2-5) and, if desired, pigments, plasticisers, filling materials, light stabilisers and heat stabilisers (total of 0-20). The invention also discloses a method of preparing the disclosed composition and use thereof in sealing building structures or flat roofs.

EFFECT: composition does not contain water and other solvents, is elastic and is capable of self-levelling; simultaneously hydraulic resistance sufficient for its use in sealing slanted or vertical surfaces.

8 cl, 1 tbl, 2 ex

 

The present invention relates to one-component, anhydrous compositions for coatings intended for sealing building structures and flat roofs, on the basis of MS (modified Milanovich) polymers consisting of a mixture of polyoxyalkylene end with a silanol group, preferably of polyoxypropylene with the terminal methoxy-alkyl-a silanol group having a different viscosity, and chalk powder, drying agent, curing catalysts, accelerators, adhesion and, optionally, other additives. The obtained curable by atmospheric moisture composition for coating is distinguished by its hydraulic resistance, high elasticity, resistance to weathering, low shrinkage and good ability to form coating, thus can be sealed not only vertical and horizontal outer surfaces, and the transitions between the different sections of the roof.

In the construction industry there is a need for sealing building structures and/or structural elements made of mineral or organic building materials, to prevent penetration of water; particularly important in this context is to seal joints or cracks. To meet such requirements on a flat roof while they are in the system or repair for many years inflicted durable cover made of plastic or viscoelastic coating.

In accordance with known methods can be used in a variety of sealing materials.

Since the beginning of the last century, was used bitumen sheets of cardboard (only). However, this technology is now used rarely, because the sealing of corners, edges and holes is difficult, and, in spite of careful work in such places easily occur leaks.

Although the use of hot liquid bitumen or polymer mixtures can avoid the mentioned problems, providing coverage, workers are exposed to significant toxic emissions. Similar problems arise when using solvent-based bituminous mixtures and mixtures of synthetic resins, therefore, solvent-based sealants are currently used rarely. Compositions for coatings based on polyurethane, one - or two-component form, can be obtained without organic solvents, however, they contain highly toxic isocyanate compounds, which greatly complicates their application.

When applying the aqueous polymer dispersions or polymer emulsions by brush or spraying conditions are more favorable. However, these sealing materials dries very quickly only when ambient temperatures to enter is 15°C. On the other hand, when the temperature of the drying more than 20°With easy going encapsulation, which can lead to the formation of bubbles and leaks. Moreover, the stability of aqueous compositions for coating is low, therefore, to obtain a sufficient thickness of the layers and, therefore, sufficient protection against moisture penetration two or more layers must be deposited one upon the other.

One-component composition for coatings based on silicone otverzhdajutsja atmospheric moisture. The best known systems are acetate system, when cured produce acetic acid. The disadvantage of such systems is the lack of adhesion to many building materials, and poor ability to form coatings. Moreover, the stability to atmospheric effects when applied externally, usually does not meet the requirements in Central Europe.

To eliminate such disadvantages of 25 years ago were developed hybrid polymers consisting of conventional construction polymers, such as, for example, propylene oxide, and silanes. In this case, silane groups include mainly metoxygroup, which under the influence of atmospheric moisture during curing into methanol. The resulting silanol groups then react further with cross stitching.

<> Such hybrid polymers or, more precisely, the prepolymers are produced in the market industry under the name “MS polymer (modified silane polymers). G. Habenicht provides an overview of this technology in the book “Kleben”, Springer Verlag, 3rdedition, Berlin, 1997.

However, in this context, in the prior art can be additionally mentioned the following number of patents.

EP 0824574 offers the use of two-component sealant based polyether prepolymers with terminal a silanol group, while the second component is used as an agent for cross-linkage of the prepolymers. However, this system is not widely used because of high cost and complexity.

In EP 0442380 described contact adhesive consisting of polyoxyalkylene end with a silanol group, and the method of adhesive bonding of adherents. However, its applicability as a composition for coating the purpose of sealing building structures is not obvious from this application.

From EP 0342411 know that MS polymers should be added stabilizers, such as, for example, Monomeric isocyanates, with the aim of increasing the hydraulic resistance of the sealing compounds to the level applicable in practice. However, due to the high toxicity describes the link is this offer has not become widespread in the field of technology.

However, to date, clean MS polymers has not established itself as compositions for coatings intended for sealing building structures, despite their radically primary properties. In General, the reasons for this failure lie in the difficulty of their application, because pure MS polymers capable of forming only a very thin films. Thicker films, such as film, which is required for the sealing surface, sealing joints or cracks did not meet the desired requirements, as MS polymers were overidealize too slow or hydraulic resistance on vertical or inclined surfaces was inappropriate for a smooth waterproof coating.

Therefore, the aim of the present invention is to provide a composition of one-component, solvent free and water, preserving the elasticity of the composition for coatings intended for sealing building structures and/or flat roofs, based on MS polymers, which, despite the fact that it can be designed to provide self-alignment, at the same time has sufficient hydraulic resistance in order to make possible its use for sealing inclined and/or vertical surface is she.

This objective is provided by a single component that does not contain water composition for coatings based on MS polymers, characterized in,that it consists of a mixture of polyoxyalkylene end with a silanol group having a different viscosity, generally constituting from 20 to 50 wt.%, from 30 to 70 wt.% the chalk powder, from 0.5 to 5 wt.% dewatering agents, from 0.1 to 5 wt.% the curing agent, from 0.2 to 5 wt.% accelerator adhesion and, if desired, in General, pigments, plasticizers, fillers, light stabilizers and stabilizers from 0 to 20 wt.%.

Composition for coatings according to this invention is very well linked with all of the usual construction and/or roofing materials, such as, for example, materials made of concrete, wood, plastics, metals, fibers, glass fiber and various kinds of roofing felt, thereby eliminating the need for priming. The level of shrinkage, however, is very low and swelling does not occur. The ability to form coating with solvent-based or water-containing materials for coatings is very good, in contrast to similar abilities pure silicones. Moreover, the claimed composition for coatings can be applied even on wet surfaces. It provides a constant elasticity within a few the em. The exact retention period elasticity certainly depends on the prevailing environmental conditions such as humidity, pH, temperature and mechanical load.

Composition for coating cures in the cycle of reactions of hydrolysis and condensation reactions Milanovich groups. Starting mechanism for these reactions is the atmospheric humidity. When removing a small amount of methanol from methoxypropyl formed elastic and insoluble mesh. The reaction rate can be adjusted by adding a curing agent.

One of the preferred variants of the present invention relates to one-component not containing water composition for coatings based on MS polymers, characterized in that it includes as polyoxyalkylene end with a silanol group polyoxypropylene products with terminal methoxy-alkyl-a silanol group, having a viscosity comprising from 0.1 to 1.0 PA·s, from 5 to 10 PA·s, from 10 to 15 PA·s and/or from 15 to 25 PA·s (measured at 20°C and a shear rate of 10 sec-1). As a result of this combination of two types of MS polymers and other components of the composition can be defined as highly mobile, and highly viscous flow behavior of the claimed compositions for coatings.

According to a preferred variant implementation of the invention, ispolzuetsyaprintsip end with a silanol group include two polyoxypropylene with the terminal methoxy-alkyl-a silanol group, viscosity, comprising from 5 to 10 PA·s and/or from 10 to 15 PA·s (measured at 20°C and a shear rate of 10 sec-1) when the mass ratio of from 10:1 to 1:5.

The use of polyoxyalkylene end with a silanol group with different viscosities allows you to set the viscosity of the claimed compositions for coatings. The viscosity of the modified silanes polyoxypropylene of the prepolymers is determined molecular masses and/or the distribution of molecular masses of MS polyoxypropylene. From a practical point of view Brednikova molecular weight used polyoxypropylene of prepolymers with terminal a silanol group, i.e. to hydrolytic removal of methoxypropyl, should vary between approximately 1000 and 30000 g/mol. In this context, the viscosity, which constitutes about 7 PA·s, corresponds srednetsenovoj molecular weight of about 25000 g/mol.

Obtained according to this invention, the composition for coatings according to the above description, using the above polyoxypropylene end with a silanol group, having a viscosity of 15 PA·s, with the mass ratio of the blend components constituting from 5 to 1, without the addition of chalk, produces a product having a viscosity, component 7 PA·s (20°C, 10 sec-1).

According to another of predpochtitel the final option is one component, solvent free and water composition for coating includes from 20 to 70 wt.% powder chalk, gidrofobizirovannogo a stearate. Used chalk materials hydrophobizing normal stearates such as calcium stearate, and stearic acid. Content stearate should not exceed 3%.

Generally speaking, the purpose of adding chalk is, as far as possible, the task of physical and mechanical properties of the claimed sealing compositions having a specific purpose. Adding chalk especially positive effect on bond strength. At the same time, the viscosity can be lowered to the desired level.

The particle size of the powders used chalk may vary within a wide range depending on the desired film thickness. However, when implementing the present invention, it is preferable to use chalk powders with a particle size constituting less than 20 μm, most preferably less than 10 microns.

Since when exposed to moisture metoxygroup of prepolymers with terminal a silanol group are subjected to hydrolysis and cross-linking, upon receipt of the claimed compositions for coatings, you must add the drying agent performing the function of a water absorber. This allows storage of adhesives and sealants. Particularly suitable for this rol what is VINYLTRIMETHOXYSILANE. Due to the electronic structure of this compound, metoxygroup hydrolyzed much faster than metoxygroup used MS polymers. MS polymers are cross-stitching only after spending the greater part of the drying agent. The number of added VINYLTRIMETHOXYSILANE is determined by the amount of water in the ingredients; in practice, it is typically about 1 wt.%.

In addition, to improve the adhesion of the composition for coating surfaces can be added accelerators, adhesion, especially accelerators, adhesion silane-based. Adding from 0.2 to 5 wt.% aminopropyltrimethoxysilane or aminoethylaminomethyl was effective.

In order to accelerate curing of the composition for coatings according to this invention after the application at the stage of obtaining type condensing silanol combined with caffeine catalysts (curing agent). Found suitable catalysts include carboxylates and chelates of tin, titanium and aluminum. Particularly suitable is diacetylated dibutylamine. Mass fraction of catalyst is from 0.1 to 5 wt.%, preferably from 1 to 2 wt.%.

In addition, the claimed composition for coating may include conventional excipients, such as colored pigments, plasticizers, sitosterols the Torah and the fillers in the total number, comprising from 0 to 20 wt.%. Examples of suitable colored pigments are titanium dioxide, iron oxide, carbon black or other colored pigments.

For plasticization can be used conventional connection. There may be especially mentioned known phthalic esters, cyclohexanecarbonyl esters or polypropylene oxide.

In addition, the light resistance of the composition for coating can be improved by using light stabilizers. Particularly suitable for this purpose are compounds known as HALS compounds (spatial difficult light stabilizers such as bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate or compounds from the group of benzotriazoles, such as, for example, 2,4-di-tert-butyl-6-(5-chlorobenzotriazol-2-yl)phenol.

Other possible additives, which may be useful in specific cases, are finely ground fillers, coatings or without them. Examples which may be mentioned here include the following materials: dolomite, talc, mica and heavy spar.

A composition for coatings according to this invention occurs in a periodic vacuum mixer. Liquid components of polymers with end a silanol group (MS polymers) is weighed and loaded into the mixer, then, if desired, to add plastify the ATOR, pigments and light stabilizers. These ingredients are carefully mixed and then injected solid components, mainly the powder of chalk, with a strong shift and, at the same time, shallow vacuum (approximately 100 mbar).

After cooling the batch to approximately 50°C or below enter a dewatering agent. After this can be added and mixed curing agent. Since after the air intake in the party can form gas bubbles, again carry out short degassing.

Obtained in this way single-component, solvent-free and water composition for coatings, designed for sealing building structures or flat roofs, can be used in texnoprosistem sector, crafts and among domestic craftsmen. Composition for coating may be applied by brush, roller or knife coating or by using commercial equipment for spraying. She bonded with all the usual industrial building materials such as metals, various types of roofing felts, woven fibrous materials, plastics, glass, ceramics, and mineral building materials. Thanks to the possibility of regulating the viscosity, it can be applied on vertical and horizontal surfaces. Moreover, typically the primer substrate metropulse.

The claimed composition for coating is particularly suitable for sealing building structures and/or flat roofs as with the installation of roof construction and repair flat roofs. In particular, there may be mentioned sealing flat roofs with a bookmark mesh glass fibre materials in places where there may be cracks; further examples include sealing compounds chimney, dome lamps on the roofs and critical areas on the edges and corners of the flat roofs. Moreover, the described compositions for coatings are also suitable for protection of foundations, balconies, patio, beacons or flags from moisture. Another large area of application includes the sealing of joints of all kinds. As examples can be mentioned expansion joints and expansion joints on flat roofs or transition joints sealants on building structures.

Composition for coatings according to this invention is a one-component system that does not contain organic solvents, bitumen, and contains no water. The drying time for a layer thickness of 1.5 mm is approximately 24 hours at 20°C and 60% relative humidity. Two or more layers can be superimposed one on top of another without problems. Shrinkage during solidification is minimal is Noah, while this composition may be applied to the upper layer or from the aqueous dispersion coatings or solvent-containing coating materials. Sealants from it remain elastic for a long time and are resistant to light.

Examples

Example 1

10 kg of polyoxypropylene with end dimethoxy-methyl-a silanol group with a viscosity, part 1 PA·s, and 15 kg of polyoxypropylene with end dimethoxy-methyl-a silanol group with a viscosity of about 10 PA·s (all values were obtained at 20°C, 10 sec-1), 15 kg of diisodecylphthalate, 1 kg of pigment titanium dioxide and 0.25 kg of bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate load in a planetary mixer with vacuum and loaded the ingredients are thoroughly homogenized at atmospheric pressure. Then 50 kg gidrofobizirovannogo powder chalk, 90 wt.% particles which have a size of <10 μm, are mixed in a vacuum at 50 mbar.

Then the mixture was allowed to cool to 40°C, let the air and at atmospheric pressure with stirring, add 1 kg of VINYLTRIMETHOXYSILANE. Then add 0.5 kg of aminopropyltriethoxysilane and, finally, 0.5 kg deacetylation dibutylamine, and the mixture is stirred until a uniform state, and then again Tegaserod at 100 mbar.

The viscosity of the composition is and is 30 PA·S.

For testing the obtained composition for coatings applied by knife coating on samples of concrete slabs (25) 1.5 mm thick and allowed to dry for 5 days at 20°C and 60% relative humidity. Obtained during these tests the characteristic data shown in table 1.

Example 2

20 kg of polyoxypropylene with end dimethoxy-methyl-a silanol group with a viscosity component 10 PA·s, and 4 kg of polyoxypropylene with end dimethoxy-methyl-a silanol group with a viscosity component 20 PA·s (all values were obtained at 20°C, 10 sec-1), 10 kg of diisodecylphthalate, 1 kg of carbon black, 0.5 kg of titanium dioxide and 0.33 kg of bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate load in a planetary mixer with vacuum and loaded the ingredients in a short time stirred together at atmospheric pressure. Then add 35 kg of chalk powder, 90 wt.% <15 μm, and the mixture is subjected to shear until then, until it becomes homogeneous.

The mixture is then cooled to a temperature below 50°C, let the air and at atmospheric pressure and stirring 1.5 kg of VINYLTRIMETHOXYSILANE. After that add 0.6 kg of aminotrimethylene and, finally, 0.6 kg deacetylation dibutylamine, and the mixture is stirred until a uniform state and again Tegaserod over to Otago period of time at 50 mbar. The viscosity of the obtained composition for coating is 60 PA·S.

For testing the resulting material is applied onto a plate of glass with a thickness of 1.5 mm, the Characteristic data shown in table 1, were obtained after a 5-day drying at 25°C and 60% relative humidity.

Table 1
Characteristic valueExample 1Example 2
The formation of the surface (minutes)(20°C, 60% relative humidity)1515
Adhesive strength (MPa)0,71,1
Temperature (°C) (DIN 52123)7080
The connection of cracks (mm)75
Water (20°C)++
The diffusion coefficient of water vapor40003500
Firmly the th And shore 3545
Water resistant (at 0.4 N/mm2)++

1. One-component not containing water composition for coatings based on polymers modified with silane, characterized in that the composition consists of a mixture of polyoxypropylene products with terminal methoxy-alkyl-a silanol group, having a viscosity comprising from 0.1 to 1.0 PA·s, from 5 to 10 PA·s, from 10 to 15 PA·s and/or from 15 to 25 PA·s (measured at 20°C and a shear rate of 10-1), generally constituting from 20 to 50 wt.% from 30 to 70 wt.% the chalk powder, from 0.5 to 5 wt.% dewatering agents, from 0.1 to 5 wt.% the curing agent, from 0.2 to 5 wt.% accelerator adhesion and, if desired, generally from 0 to 20 wt.% pigments, plasticizers, fillers, light stabilizers and stabilizers.

2. One-component not containing water composition for coating according to claim 1, characterized in that the composition includes polyoxypropylene products with terminal methoxy-alkyl-a silanol group, having a viscosity comprising from 5 to 10 PA·s and/or from 10 to 15 PA·s (measured at 20°C and a shear rate of 10-1) at a mass ratio of from 10:1 to 1:5.

3. One-component not containing water composition for coating according to claim 1, characterized in that the composition includes as chalk powder from 30 to 70 wt.% powder chalk, gidrofobizirovannogo the stearates.

4. One-component not containing water composition for coating according to claim 1, characterized in that the composition comprises as a dewatering agent is from 0.5 to 5 wt.% VINYLTRIMETHOXYSILANE.

5. One-component not containing water composition for coating according to claim 1, characterized in that the composition comprises as catalyst from 0.1 to 5 wt.% deacetylation dibutylamine.

6. One-component not containing water composition for coating according to claim 1, characterized in that the composition comprises as accelerators of adhesion of from 0.2 to 5 wt.% aminosilanes, such as aminopropyltrimethoxysilane or aminoethylaminomethyl.

7. The method of obtaining single-component not containing water composition for coating according to claims 1-6, designed for sealing building structures based on polymer-modified silane, characterized in that the liquid polyoxypropylene products with terminal methoxy-alkyl-a silanol group are loaded into a vacuum mixer together with a plasticizer, stabilizers and pigments, if necessary, and then mix the powder with chalk degassing in a vacuum; then separately enter dewatering agents, accelerators, adhesion and curing agent, after which the resulting mixture is again subjected to degassing.

8. Use the s-component not containing water composition for coating according to any one of claims 1 to 7 for sealing building structures or flat roofs.



 

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28 cl, 14 ex, 3 tbl, 4 dwg

FIELD: chemistry.

SUBSTANCE: described is a polyol composition containing polyol (a) and fine resin particles (b), dispersed in the polyol (a), where the fine resin particles (b) are polymer particles obtained by polymerising an ethylene unsaturated monomer (d) and content of particles with diametre of not less than 10 mcm in the fine polymer particles (b) is not greater than 2 vol %. The fine resin particles (b) are particles for which arithmetic standard deviation for particle size distribution per unit volume, obtained based on corresponding values in 85 intervals of the range from 0.020 to 2000 mcm, determined using a particle size distribution analyser through a laser radiation diffraction/scattering method, is not greater than 0.6. The resin has ultimate tensile strength of 1.54-1.65 kgf/cm2 and breaking elongation of 116-123%.

EFFECT: improved mechanical strength parametres.

17 cl, 6 tbl, 24 ex

FIELD: chemistry.

SUBSTANCE: composition contains at least one cross-linked polymer with a number of functional groups which can be cross-linked under suitable conditions, which can react with other and which can be either isocyanate groups, or silyl groups, or a combination of both, or with a suitable cross-linking agent. The composition contains either (a) a cross-linked polymer, main polymer chain of which includes at least two different oxyalkylene branches OX1 and OX2, or (b) first cross-linked polymer, main polymer chain of which includes at least a first branch OX1 and at least a second cross-linked polymer, main polymer chain of which includes at least, a second branch OX2, or (c) a mixture of cross-linked polymers (a) and (b), where the mass ratio of OX1 to OX2 ranges from 10:90 to 90:10. Described also are cross-linked polymer compositions, obtained by reacting (A) isocyanate component and either (B) a mixture of two or more polyols, where at least two polyols have branches OX1 and OX2, or (C) polyol with OX1 branches and (D) polyols with OX2 branches, respectively.

EFFECT: improved physical and mechanical properties, good outward appearance and good adhesion to smooth inert surfaces.

12 cl, 14 ex

FIELD: chemistry.

SUBSTANCE: present invention refers to the polymer admixtures for rapid preparation of hydrodynamically active polymer solutions decreasing the hydrodynamic resistance at transporting of water mixtures in pipelines. The said admixture contains polyox (polyether) as polymer and additionally detergent and conservant Amirol-M based on product of triethanolamine interreaction with oxidised high fatty acids and water at determined component ratio.

EFFECT: enhanced stability and resistance to layering.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention concerns compositions reactive towards isocyanate, applied for obtaining rigid foamed polyurethanes of heat insulation purpose. Invention claims polyol composition including (wt %) four polyols as polyol reagent: reaction product of propylene oxide with aqueous ethylenediamine solution with hydroxyl value within 729-800 mg of KOH/g and dynamic viscosity within 1500-2000 mPa·s at 50°C ·- Lapromol 294 (0.4-0.8); simple polyether based on propylene oxide and glycerin with hydroxyl value of 480 mg of KOH/g and dynamic viscosity within 400-500 mPa·s at 25°C - Laprol 373 (6.5-8.5); sucrose polyether product of oxypropylation of sucrose and water mix with hydroxyl value within 400-450 mg of KOH/g and dynamic viscosity within 2000-3000 mPa·s at 25°C - Polyur A-01 or simple polyether based on propylene oxide and sucrose system with hydroxyl value within 465-515 mg of KOH/g and dynamic viscosity within 7500-11500 mPa·s at 25°C - Laprol ES-564 (28.0-36.0); polyether from polyol mix with hydroxyl value within 329-461 mg of KOH/g and 60 s viscosity by viscosity gauge VZ-246 at 20°C - Polyur AZ-20 grade A (14.0-25.0); and additionally including antipyrene additive of tri-(β-chlorethyl)phosphate (the rest).

EFFECT: obtaining polyol composition preserving reactivity towards isocyanate during long storage time, obtaining rigid polyurethane with improved durability properties maintaining required density.

1 cl, 2 tbl, 4 ex

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention relates to polyurethane foam/polyisocyanurate strengthened by glass fibers and a method for their synthesis. Method involves the following steps: (1) contacting isocyanate component of viscosity in the range from 200 to 600 mPa x s, component based on polyhydric alcohol comprising the first polyhydric alcohol and representing derivative of sorbitol, the second polyhydric alcohol of a simple polyether type and the third polyhydric alcohol of polyester type. Abovementioned polyhydric alcohols show viscosity in the range from 200 to 600 mPa x s, and reaction is carried out in the presence of catalysts chosen from tin salts, potassium carboxylates and in the known cases tertiary amines, physical and/or chemical swelling agent, emulsifier and, if necessary, a flame retardant agent; (2) impregnation with a composition prepared at step (1), package of glass fibers, and (3) foaming and hardening abovementioned composition to form strengthened foam-block containing glass fibers package. Prepared strengthened foam-block shows mean density in the range from 115 to 135 kg/m3 but from 120 to 130 kg/m3 preferably, above about 130 kg/m3, and isocyanate number in the range from 100 to 180 but from 130 to 180 preferably. Also, invention describes a method for synthesis of polyurethane foam/polyisocyanurate for transporting liquefied gas, in particular, tanks for transport of liquefied methane.

EFFECT: improved method of synthesis.

4 cl, 6 tbl

FIELD: polymer production.

SUBSTANCE: in the first step of two-step polymer-polyol preparation, polyether, notably Laprol 5003 or Laprol 5003/Laprol 3003 mixture, is combined with polymer selected from group, including polystyrene, styrene-acrylonitrile copolymer, styrene-butadiene copolymer, acrylonitrile-butadiene-styrene plastic, and mixtures thereof, at temperature 100°C. In the second step, at 90°C and pressure 0.2 MPa, monomer selected from group including acrylonitrile, styrene, acrylate, vinylidene chloride, and mixtures thereof is added before addition of catalyst. Resulting mixture is stirred at 100-110°C and pressure 0.25 MPa.

EFFECT: enabled preparation of stable dispersion, reduced process cycle time, and lowered power consumption.

2 cl, 2 tbl, 5 ex

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