Cellular polymer particle, composition for preparing it, and a particle preparation method (embodiments)

FIELD: polymer materials.

SUBSTANCE: invention relates to preparation of cellular polymer particles suited to be used in coating deposition compositions. Cellular polyesters-based polymer particle according to invention including spherical particles having numerous air hollows and long-chain aliphatic groups and/or spatially hindered branched-chain hydrophobic groups associated with surface of said spherical particles is proposed. A composition for preparing indicated cellular particles and a method of preparing the same are developed.

EFFECT: enlarged assortment of starting materials for polymeric coating compositions.

11 cl, 10 tbl, 17 ex

 

The technical field of the invention

This invention relates to cellular (vesiculated polymeric particles, method of production thereof and their use in compositions for coating.

The level of technology

Morphology stitched multicasting particle complex polyester described in the prior art, is formed in a generally spherical hollow particles having a lot of air voids in the solid state. These particles resorbent water in paints and coatings, they are difficult to obtain and the degree of regulation of the particle size they have limited technological variables, such as temperature, mixing speed and duration of the process.

In international publication WO 81/01711 describes the obtaining of porous granules. In this way form a first emulsion (EMI), in which the aqueous phase containing dispersed therein a pigment, emuleret in a mixture of unsaturated complex polyester and copolymerizable monomer present in the form of a solution of complex polyester in a monomer. This emulsion water-in-oil". After that EMI emuleret at high shear in the aqueous phase and gain emulsion water-in-oil-in-water, including the oil phase in the form of globules complex polyester/monomer, each of which contains multiple cells of the initial aqueous phase. For mandatory UN paid is by stitching a complex of polyester in terms of curing add the polymerization initiator and produces the desired mesh granules. Use monomers with shorter chain (C12 and less), characterized by a minimum repellency.

The purpose of this invention is to provide crosslinked particles of a complex of the polyester, the morphology of which is formed mainly of spherical particles, with many air bubbles, which will prevent re-enter and re-absorption of water, when crosslinked particles will be dry.

An additional aim of the invention is to provide a method for the transformation of the composition of the original substance, which will make possible the regulation of the size and distribution for the cross-linked particles using process variables such as temperature, mixing speed and duration of the technological process, as well as by using the modifier concentration of co monomer in the composition of the starting compounds and the optimization of the technological stage of adding this co monomer to the composition.

And another additional objective of this invention is to provide a porous polymeric particles that can be used in the formulation of paints and coatings with excellent substitution of pigments based on titanium dioxide, expensive fillers, emulsion polymers, modifiers setting time of the film at the edges, such as glycols, wetting Rea the clients while gaining improved opacity, degree of whiteness, resistance to scratching, resistance to water and special patterned coatings in the form of finishing under any material.

Description of the invention

In accordance with the invention, the porous polymer particles include solid particles, which is a spherical solid particles with multiple cavities, and they contain associated with their surfaces long-chain aliphatic chemical group and/or spatial employed razvetvlenno-chain chemical group.

In one form of the invention the chemical group is hydrophobic and include organic compounds having at least one curable double bond carbon-carbon linear, branched or cyclic chains containing at least fourteen but not more than twenty-five carbon atoms, including the following, but not limited to them: octadecan; laurenmarie; acelerando castor oil; arilirovaniya ricinolein acid; metakrilovoy ricinolein acid; soybean oil; unsaturated fatty acids such as oleic acid, fatty acid of animal oil; unsaturated fatty alcohols, for example alerby alcohol, pentadec-12-ene-1-ol; oleamide; triglycerides, such as tall oil, Tung oil; urethanes with the unsaturation of the ethylene type; urethanes with unsaturated acrylic type; air-dried "skinny" alkyd resins; alkalemia and arrowie esters of maleic anhydride, individually or in combination.

These monomers are essentially more hydrophobic compared with conventional monomers used in the prior art, such as methacrylate, acrylate, Acrylonitrile and vinyltoluene.

In this description, the term "associate" may refer to the groups included in the polymer particles or entered on their surface or surface.

In accordance with the second aspect of the invention, the composition of the original substances designed to produce porous particles, includes having the functionality of the carboxylic acid, the polymerized by free-radical mechanism polyester resin-based esters, diluting monomer as coreagent and

modifying comonomer, thus modifying comonomer has at least one curable double bond carbon-carbon linear, branched or tsiklicheskimi chains containing at least fourteen but not more than twenty-five carbon atoms, including the following, but not limited to them:

laurenmarie; acelerando castor oil; AK is iliriana ricinolein acid; metakrilovoy ricinolein acid; soybean oil; unsaturated fatty acids such as oleic acid, fatty acid of animal oil; unsaturated fatty alcohols, for example alerby alcohol, pentadec-12-ene-1-ol; oleamide; triglycerides, such as tall oil, Tung oil; urethanes with the unsaturation of ethylene type; urethanes with unsaturated acrylic type; air-dried "skinny" alkyd resins; alkalemia and arrowie esters of maleic anhydride, individually or in combination.

Modifying comonomer can range from 3 to 20 wt.% the number added or reactive dilution monomer, and preferably it is from 5 to 9 wt.% from the amount of added diluting monomer. This prevents dilution of the monomer present in the polyester resin-based esters.

Appropriate dilution comonomers include monomers with ethylene, acrylic and methacrylic functionality, such as styrene, butyl acrylate, methyl methacrylate, and preferably styrene.

In one form, the composition of the polyester resin on the basis of esters comprises in wt.%:

Propylene glycol30,35
Phthalic anhydride12,96
The maleinos the first anhydride 25,75
Styrene30,75
Inhibitor (10 %solution)0,18
Total100,00

In accordance with a third aspect of the invention is a method of obtaining porous particles involves the following stages:

- preliminary dispersion of pigment particles in a complex polyester;

- dissolution of the pre-dispersion pigment is a complex polyester in a suitable monomer in the presence of a water-soluble base;

- formation of a stable emulsion is formed by drops of a solution of the pre-dispersion pigment is a complex polyester and monomer (oil phase) in water;

- adding a hydrophobic monomer;

- polymerization complex polyester and copolymerizable monomer with obtaining, thus, in the form of a dispersion in water of the granules formed opaque crosslinked porous particles, and the particles have hydrophobic groups associated with their surfaces.

Delayed addition of hydrophobic (modifier) of monomer in the moment will form a stable emulsion, the result allows you to save the size of the particles to be foamed particles obtained by mixing at the time of emulsification.

In one form, the base may include polyamine, such as Diethylenetriamine.

Particles of different RA the Mer can be obtained by using different mixers with different intensity of mixing during emulsification complex of the polyester in water. In one form of the invention may use appropriately designed equipment with adjustment of pressure, temperature and residence time, such as homogenizers. Chemical regulation of the particle size and distribution of particles also carry out the introduction of long-chain aliphatic or spatial difficult razvetvlenno-chain comonomers.

Since most of these monomers or macromonomers when introduced into the porous polymer particles, the average particle size escalates, it was thought preferable to add them at a later stage during the emulsification of the organic phase in the aqueous phase. This minimizes the influence on the particle size. However, variants with larger particle size can be used to give the paint special effects, such as textures.

Modified porous polymeric particles when the system colors have the effect of improving the water resistance, abrasion resistance, whiteness and opacity.

EXAMPLES

The following examples are intended to illustrate the invention but they are not in order to limit the scope of the invention.

Example 1

The following cellular polymer particles synthesized in accordance with the precede is their level of technology.

Mass parts
Stage 1
Complex polyester14,99
Titanium dioxide0,86
Styrene6,54
Diethylenetriamine0,21
Stage 2
The solution of polyvinyl alcohol (10 %)13,28
The solution of hydroxyethyl cellulose (2,5 %)10,45
Water52,92
Diethylenetriamine0,06
Stage 3
Water0,21
Sulphate of iron (II)0,01
Cumene hydroperoxide0,12
Stage 4
Bactericide0,35
TOTAL100,00

The method

1. Titanium dioxide is dispersed in a complex polyester with high speed, receiving the mixture with a large shearing force.

2. To the above-mentioned 1) low speed add the styrene and Diethylenetriamine.

3. Stage 2 will receive in a separate tank at low speed.

4. Stage 1 (organic phase) is added to stage 2 with high speed, receiving the mixture when the pain is the first shearing force and conducting stirring until until you get the desired particle size of the organic phase.

5. After that, at low shear add stage 3, first, a preliminary mixing of sulphate of iron (II) and water, and then adding. This is followed by the addition of cumene hydroperoxide.

6. The stirrer is stopped and leave the product alone for curing during the night.

7. After that cellular particles are mixed to achieve homogeneity and add suitable bactericide.

Get flowing white dispersion of cross-linked polymer particles in water, which dispersion after drying forms a film-forming particles having a lot of air voids.

The average particle size will vary depending on the mixing intensity used during the adding stage 1 to stage 2.

Example 2

Same as example 1, but 0.1 % of the styrene was replaced with laurenmarie. The mixing conditions in accordance with example 1.

Example 3

Same as example 1, but 3 % of the styrene was replaced with laurenmarie. The mixing conditions in accordance with example 1.

Example 4

Same as example 1, but 5 % of the styrene was replaced with laurenmarie. The mixing conditions in accordance with example 1.

Example 5

Same as example 1, but 7 % of the styrene was replaced with laurenmarie. The conditions of mixing in with the accordance with example 1.

Example 6

Same as example 1, but 9 % of the styrene was replaced with laurenmarie. The mixing conditions in accordance with example 1.

Example 7

Same as example 1, but 20 % of the styrene was replaced with laurenmarie. The mixing conditions in accordance with example 1.

Example 8

The porous particles obtained in the above examples 1 through 7, measured for the following properties:

1. Full solids content using content analyzer halogen-free and moisture Mettler HR73.

2. The viscosity using a Brookfield viscometer LVT.

3. the pH using a pH-meter Metrohm 744.

4. The proportion using cups weight of one gallon of" Sheen volume of 100 cubic cm

5. The opacity using the opacity charts Leneta form 2A and reflectometer Sheen micropac.

6. Whiteness using a spectrophotometer with a color analyzer BYK-Gardner.

7. The average particle size using a scanning electron microscope (software for image analysis Topcon & Scion). The results were as follows:

Porous particles obtained using a Cowles mixer with variable shear
LMA

(laurenmarie),

%
Content

hard
phase %
Viscosity,

SP
pHS.G.

(specific

weight)
OpacityDegree

white
Average

size

particles

microns
023,50800of 6.781,0430,9394,05,6
0,123,806106,661,0440,9696,76,1
323,9012006,501,0440,9696,16,9
523,6312506,55at 1,0460,9596,47,5
723,737206,741,0420,9697,08,3
923,4639006,751,0440,9595,416,0
2023,6714800of 6.731,0330,8894,536,5

Clearly demonstrated improved opacity and degree of whiteness, as well as the effect of increasing particle size.

The composition of the porous polymer particles of examples 1 through 7 were in the following next the mixture and obtained emulsion water-based paint:

The ORIGINAL SUBSTANCEMASS PARTS
Cellular particles77,5
Styrene-acrylic emulsion polymerthe 9.7
Cholesterola additive1,1
Ammonia (diluted with water to a ratio of 1:1)1
Aqueous dispersion of titanium dioxidethe 9.7
Thickener1

Paint, resulting from the use of cellular particles of examples 1 to 7, in this example were tested for resistance to scratching (abrasion) in the wet state and were obtained the following results:

1. Paint with the use of porous particles from example 1 = 20 cycles.

2. Paint with the use of porous particles from example 2 = 120 cycles.

3. Paint with the use of porous particles from example 3 = 500 cycles.

4. Paint with the use of porous particles from example 4 = 1100 cycles.

5. Paint with the use of porous particles from example 5 = 1500 cycles.

6. Paint with the use of porous particles from example 6 = 900 cycles.

7. Paint with ispolzovaniem particles from example 7 = 600 cycles.

Higher values of number of cycles scratching in the wet state indicate better resistance to scratching and abrasion in the final paint. The results confirm the improvement of the water resistance and resistance to scratching, obtained using the compositions of this invention in paints and coatings.

Example 10

Repetition of example 4, but using octadecene instead of lauriemittiet. The mixing conditions in accordance with example 1.

Example 11

Repetition of example 4, but using acelerando methylaziridine instead of lauriemittiet. The mixing conditions in accordance with example 1.

Example 12

Repetition of example 4, but using metakrylowego ricinoleate instead of lauriemittiet. The mixing conditions in accordance with example 1.

Example 13

The porous polymer particles of examples 10, 11 and 12 made measurements of the properties mentioned in example 8.

The results were as follows:

Porous particles obtained using a Cowles mixer with variable shear
ExampleThe solid content

phase %
Viscosity, SPpHS.G.Opacity Degree

white
The average particle size,

microns
1023,39100006,561,0450,9595,017
1123,4818006,721,0430,9695,49
1223,5019006,471,0450,96for 95.29

Example 14

The composition of the porous polymer particles of examples 10, 11 and 12 were in the form of a water-based paints in accordance with example 9 and tested for resistance to scratching (abrasion) in the wet state.

1. Paint with the use of porous particles from example 1 = 20 cycles.

2. Paint with the use of porous particles from example 10 = 500 cycles.

3. Paint with the use of porous particles from example 11= 1000 cycles.

4. Paint with the use of porous particles from example 12 = 1200 cycles.

The results confirm the improvement of the water resistance and resistance to scratching, obtained using the compositions of this invention in paints and coatings.

Example 15

Comparing the resistance and the degree of whiteness of the paint containing:

cellular particles synthesized using technology the technology of the prior art (example 1);

cellular particles synthesized using the technology of this patent (example 4).

The paint was of average quality, and fit for use for interior and exterior decoration.

This is followed by the results.

PaintAndIn
Porous particles of(example 1)(example 4)
Water resistance
- the way the water drops(1)5 min10 min
- abrasion resistance in1280 cycles2198 cycles
wet(2)
Color D10° (with respect to
standard)(3)
L- 0,28 D-0.51D
And- 0,06 G-0,10G
In1.09Y0,43 Y
DECMC11,410,63

(1) the resistance in this way was determined by exposing the impact of water droplets in the paint layer, which was dried at on the th temperature for 24 hours, influence on the paint surface. Recorded the time required for the formation of swellings or softening of the paint in contact with the water drop. The longer the time the better the resistance. The test was stopped after 10 minutes.

(2) abrasion Resistance in the wet state was determined by the proposed method. The more the number of cycles, the better the abrasion resistance in the wet state.

(3) Color measurements were made on a color computer and perform the matching paint containing porous particles from example 1.

The value of L being positive indicates the difference in the direction of lighter color, and being negative indicates the difference in the direction of a more dark color. Paint slightly darker than the paint A.

Value And being positive indicates a distinct reddish color, and, being negative indicates the difference in the direction of green. Paint is characterized by very slightly greater admixture of green compared to paint A.

The value In being positive indicates the difference in the direction of yellow, while a negative indicates a difference in the direction of blue. Paint is less admixture of yellow compared to Kras is Oh And and, thus, a higher degree of whiteness.

DE CMC is a total contrast colour. Paint characterized by a lower degree of overall color change compared with paint A.

Example 16

The cellular composition of the particles (that is, example 1 and example 4) was with getting the following water-based paints:

- paint medium quality for interior/exterior decoration;

- Matt high quality paint for interior decoration;

- edge to obtain a patterned coating.

Evaluated the properties of colors.

The following are formulations of paints and the results of the tests.

Example 17

Cellular particles synthesized in accordance with example 1 and example 4.

Mesh particles were applied to black-and-white chart opacity using straps for drawing the stroke length 200 mm

The opacity (i.e., the effectiveness of luting image) was measured on the black and white areas of the chart opacity using a reflectometer. The resulting measurement to reflect over the white area divided by the value of measuring reflection over the black area.

The results were as follows:

Example 1Example 4
Opacity0.93/td> 0,95

The higher the value, the higher will be the efficiency of luting image for cellular granules.

Matte high quality paint for interior/exterior finish

Cellular particles (example 1)
Paint AndPaint
Water28,1128,11
Disperser0,240,24
Titanium dioxideof 7.90of 7.90
Calcium carbonate (2 micron)21,8221,82
Calcium carbonate (5 micron)8,118,11
Propylene glycol1,021,02
Anionic surface-active

substance
0,090,09
Antifoam0,310,31
Hydroxyethylcellulose0,330,33
Ammonia0,110,11
Styrene/acrylic emulsion

(solid content
17,2017,20
phase 50 %)
Cholesterola additive1,661,66
Bactericide0,210,21
12,91-
Cellular particles (example 2)-12,91
TOTAL100,0100,0
RESULTS
Paint AndPaint
Water resistance
- the way the water drops810
- abrasion resistance in

wet
>10000>10000
Opacity

Whiteness(1)
0,88

79,57
0,92

81,06

Note: paint is more resistant, more transparency and a higher degree of whiteness than paint A.

(1) the Degree of whiteness was measured using a color computer. The higher the value, the greater the degree of white paint.

Matte high quality paint for interior design

Paint AndPaint
1. Dispersion of titanium dioxideone-21.32one-21.32
2. Dispersion of talc19,0719,07
3. For ostial 0,290,29
4. Water2,022,02
5. Ammonia0,240,24
6. Propylene glycol0,770,77
7. Cholesterola additive1,3451,345
8. Antifoam0,250,25
9. Disperser0,190,19
10. Bactericide0,100,10
11. Pure acrylic emulsion (content

solid phase 48 %)
39,5539,55
12. Thickener (for low effort shift)0,150,15
13. Thickener (for high shearing forces)0,290,29
14. Water2,952,95
15. Cellular particles(1)11,51-
16. Cellular particles (2)-11,51
TOTAL100,0100,0
RESULTS
Paint AndPaint
Water resistance
- the way the water drops810
resistance the abrasion resistance in the wet state >10000>10000
Opacity92,895,1
Whiteness78,2382,14

Note: paint is more resistant, more transparency and a higher degree of whiteness than paint A.

(1) In the regulation of the speed of mixing, the composition is foamed particles were obtained with a particle size in accordance with example 1 and with an average particle size equal to 25 microns.

(2) the cellular Composition of the particles was obtained with the particle size in accordance with example 4 and with an average particle size equal to 25 microns.

Paint to obtain a patterned coating
Paint AndPaint
1. Water6,076,07
2. Propylene glycol1,791,79
3. Disperser0,110,11
4. Surfactant0,180,18
5. Antifoam0,090,09
6. Bactericide0,050,05
7. Ammonia0,10 0,10
8. Hydroxyethylcellulose0,050,05
9. Pure acrylic emulsion (content

solid phase 48 %)
47,0447,04
10. Cholesterola additive2,092,09
11. Cellular particles(1)39,16-
12. Cellular particles(2)-39,16
All1,231,23
14. Water0,820,82
15. Kolernyh paste (paste)1,221,22
TOTAL100,0100,0
RESULTS
Paint AndPaint
The effect of finishing under the sea(3)NoPresent

(1) In the regulation of the speed of mixing, the composition is foamed particles were obtained with a particle size in accordance with example 1 and with an average particle size equal to 25 microns.

(2) the cellular Composition of the particles was obtained with the particle size in accordance with example 4 and with an average particle size equal to 25 microns.

(3) Effect of finishing under the sea represents the effect of the attached ink is to create the effect of color texture.

Paint was characterized by more efficient to create the effect of finishing under the sea compared to paint And because cellular granules on the surface is formed over the raised texture due to the low efficiency of absorption of water.

1. Cellular (vasiculated) polymer particle based on polyesters, characterized in that it includes solid particles, which is a spherical solid particles having numerous voids and it contains assosiated with its surface long-chain aliphatic chemical group and/or spatial employed razvetvlenno-chain chemical groups that are inherently hydrophobic and contain at least fourteen carbon atoms, but not more than twenty-five carbon atoms.

2. Porous polymer particle according to claim 1, characterized in that the chemical groups have at least one curable double bond carbon-carbon linear, branched or cyclic chains containing at least fourteen but not more than twenty-five carbon atoms, including laurenmarie; acelerando castor oil; acelerando ricinoleic acid; metakrilovoy ricinoleic acid; soybean oil; unsaturated fatty acids such as oleic acid, fatty to the slot butter; unsaturated fatty alcohols, such as, alerby alcohol, pentadec-12-ene-1-ol; oleamide; triglycerides, for example, tall oil, Tung oil; urethanes with the unsaturation of ethylene type; urethanes with unsaturated acrylic type; air-dried "skinny" alkyd resins; alkalemia and arrowie esters of maleic anhydride, or a combination of both.

3. The composition is designed to produce porous particles according to claims 1 and 2, characterized in that as starting substances includes a polyester resin-based esters having carboxylic acid functionality, the polymerized by free-radical mechanism, diluting monomer as coreagent with ethylene, acrylic and methacrylic functionality and modifying comonomer, thus modifying comonomer has at least one curable double bond carbon-carbon linear, branched or cyclic chains containing at least fourteen carbon atoms, but not more than twenty-five carbon atoms, including laurenmarie; acelerando castor oil; acelerando ricinoleic acid; metakrilovoy ricinoleic acid; soybean oil; unsaturated fatty acids such as oleic acid, fatty acid of animal oil; unsaturated fatty IPN is you, such as, alerby alcohol, pentadec-12-ene-1-ol; oleamide; triglycerides, for example, tall oil, Tung oil; urethanes with the unsaturation of ethylene type; urethanes with unsaturated acrylic type; air-dried "skinny" alkyd resins; alkalemia and arrowie esters of maleic anhydride, or a combination of both.

4. Porous polymer particle obtained using starting compounds of the composition according to claim 3, wherein modifying comonomer is from 3 to 20 wt.% the number of reactive dilution monomer.

5. Porous polymer particle according to claim 4, wherein modifying comonomer is from 5 to 9 wt.% the number of reactive dilution monomer.

6. Porous polymer particle according to claim 4, characterized in that the diluting monomer includes monomers with ethylene, acrylic and methacrylic functionality, or a combination of both.

7. Porous polymer particle according to claim 6, characterized in that the dilution of comonomer include styrene, butyl acrylate, methyl methacrylate, or a combination of both.

8. The method of obtaining porous particles, as claimed in claims 1 to 2, using starting compounds of the composition according to claim 3, in which regulated the size of the particles by chemical means, characterized in that it comprises the following stages:

preliminary dispersion of pigment particles in a complex polyester;

the dissolution of the pre-dispersion pigment is a complex polyester in a suitable mixture dilution of the monomer and the hydrophobic co monomer in the presence of water-soluble base;

the formation of a stable emulsion is formed by drops of a solution of the pre-dispersion pigment is a complex polyester and monomer (oil phase) in water;

and polymerization complex polyester and copolymerizable monomer, to produce in the form of a dispersion in water of the granules formed opaque crosslinked porous particles, which have a hydrophobic group, associated with their surfaces.

9. A method of obtaining a porous polymer particles, as claimed in claims 1 to 2, using starting compounds of the composition according to claim 3, characterized in that it comprises the following stages:

preliminary dispersion of pigment particles in a complex polyester;

the dissolution of the pre-dispersion pigment is a complex polyester in a suitable monomer in the presence of water-soluble base;

the formation of a stable emulsion is formed by drops of a solution of the pre-dispersion pigment is a complex polyester and monomer (oil phase) in water;

adding a hydrophobic monomer

and polymerization complex p is Levira and copolymerizable monomer, obtaining, thus, in the form of a dispersion in water of the granules formed opaque crosslinked porous particles, and the particles have hydrophobic groups associated with their surfaces.

10. The method of obtaining porous particles p and 9, characterized in that the base includes a polyamine.

11. The method according to claim 10, characterized in that the base includes Diethylenetriamine.



 

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13 cl, 7 dwg, 1 ex

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention relates to technology for producing granules used in preparing ion-exchange resins. Invention describes a method for producing polymeric monodispersed particles by suspension polymerization and involves the following steps: preparing monodispersed drops by adding a drop-forming device for preparing an aqueous dispersion medium into a chamber that formed the continuous phase, ejection of monomer hydrophobic liquid to aqueous dispersion medium through draw plate holes up under effect of regular vibration to form monomer liquid drops of a equal size preferably in aqueous dispersion medium; carrying out preliminary polymerization by adding prepared monomer liquid drops in aqueous dispersion medium into the first reactor, carrying out the polymerization reaction in a quasi-liquid layer to prepared suspension of partially polymerized drops of monomer in aqueous dispersion medium to degree when drops can't fuse or break; carrying out the final suspension polymerization at intensive stirring in the second reactor; at step for preparing monodispersed drops an aqueous dispersion medium is added to the form-forming device chamber at temperature 60-90°C, and monomer hydrophobic liquid is added into the drop-forming device at temperature 5-25°C or at environment temperature. Invention provides expanding zone for monodispersing drops of hydrophobic monomeric liquid in the drop-forming device allowing to vary sizes of prepared monodrops, and technical and technological simplifying the unit device.

EFFECT: improved producing method.

13 cl, 7 dwg, 1 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 production.

SUBSTANCE: invention provides elastomeric polymer composition comprising at least polymers and copolymers obtained from substituted and unsubstituted vinylaromatic monomers and from diene monomers and including 15 to 85% copolymer containing (i) at least one block formed by 10 to 5000 mainly syndiotactic structural sequences of monomer units derived from at least one substituted or unsubstituted vinylaromatic monomer and (ii) at least one block formed by 10 to 4000 monomer units derived from at least one diene monomer with predominant 1,4-cis structure, wherein 15-85 wt % of polymer obtained from diene monomers has molecular weight between 6000 and 600000 with content of 1,4-cis monomer units constituting at least 90%, while up to 70% of polymer obtained from substituted and unsubstituted vinylaromatic monomers has molecular weight between 10000 and 500000 and degree of syndiotacticity (expressed through syndiotactic pentads) at least 95%, a part formed by monomer units derived from diene monomer is optionally partially or completely hydrogenised. Method of preparing such elastomeric composition is also described.

EFFECT: extended temperature range for elastomeric performance of composition.

42 cl, 5 tbl, 27 ex

FIELD: polymerization processes.

SUBSTANCE: polymer containing at least one boronate substituent or its precursor is prepared by controlled living radical polymerization of monomers in presence of living chain growth control agent, in particular sulfur-containing compound having S-C(S)- bond, said monomers being represented by (i) at least one monomer having at least one boronate substituent or its precursor and selected from group consisting of acryloylbenzeneboronic acid, methacryloylbenzeneboronic acid, vinyl-4-benzeneboronic acid, 3-acrylamidophenylboronic acid, 3-methacrylamidophenylboronic acid, individually or in mixture, or in salt form, and (ii) at least having no boronate substituents nor their precursors. Also described is associate containing above-defined polymer with at least one compound ligand having at least one group capable of forming complex with the polymer containing at least one boronate substituent or its precursor.

EFFECT: narrowed molecular mass distribution and uniformity along the polymer chain.

FIELD: polymer production.

SUBSTANCE: invention is directed to production of water-soluble polymers or water-swellable hydrogels, detergents, and various composites based thereon, as well as to preparation of novel therapeutical forms. Acrylate-type polymer are obtained via light-induced polymerization of acrylate monomers in presence of metal-free porphyrins and accurately dosed quantities of molecular oxygen under irradiation by visible light within wavelength range 400-700 nm. Distinguishing feature of such a polymerization resides in high oxygen-sensitivity and concentration of porphyrin, by variation of which one can vary polymer characteristics within a wide range and. in case of acrylic acids, additionally structurize polyelectrolytes based thereon resulting in hydrogels showing different degrees of swelling in water.

EFFECT: simplified process, reduced consumption of photoinitiator, enabled polymerization of acrylic monomers in absence of their alkyl-substituted derivatives, and enabled carrying out process in bulk, in solution, or in emulsion.

6 cl, 1 tbl, 7 ex

FIELD: polymer production.

SUBSTANCE: invention is directed to production of water-soluble polymers or water-swellable hydrogels, detergents, and various composites based thereon, as well as to preparation of novel therapeutical forms. Acrylate-type polymer are obtained via light-induced polymerization of acrylate monomers in presence of metal-free porphyrins and accurately dosed quantities of molecular oxygen under irradiation by visible light within wavelength range 400-700 nm. Distinguishing feature of such a polymerization resides in high oxygen-sensitivity and concentration of porphyrin, by variation of which one can vary polymer characteristics within a wide range and. in case of acrylic acids, additionally structurize polyelectrolytes based thereon resulting in hydrogels showing different degrees of swelling in water.

EFFECT: simplified process, reduced consumption of photoinitiator, enabled polymerization of acrylic monomers in absence of their alkyl-substituted derivatives, and enabled carrying out process in bulk, in solution, or in emulsion.

6 cl, 1 tbl, 7 ex

FIELD: resins, chemical technology.

SUBSTANCE: invention relates to frothing polystyrene resin showing the best mechanical strength. Invention describes frothing polystyrene resin of high strength and comprising the following components, mas. p. p.: (a) styrene monomer, 100; (b) calcium carbonate nanoparticles, 0.5-5, and (c) dye, 0.5-10. Also, invention describes a method for preparing colored frothing polystyrene resin and frothing molded product prepared from styrene resin particles and exhibiting high strength. Invention provides preparing colored frothing resin of high strength, good degree of coloring, resistance to chemical effects and mechanical strength.

EFFECT: improved and valuable properties of resin.

4 cl, 1 tbl, 11 ex

FIELD: producing of polymer products from methacrylate and other (meth)acrylate monomers.

SUBSTANCE: continuous method for production of polymer products includes radical polymerization of methylmethacrylate systems or its mixture with other (meth)acrylate monomers or vinylacetate in presence of radical polymerization initiator to produce polymer-monomer system followed by physico-mechanical treatment (e.g. extrusion) and simultaneous depolymerization. Method of present invention makes it possible to carry out polymerization with conversion of approximately 100 %.

EFFECT: polymer products with improved physicochemical properties; simplified polymerization process.

11 cl, 8 ex, 1 tbl

FIELD: polymer materials.

SUBSTANCE: method of applying high-resolution image of functional layers, e.g. for applying lithographic mask or other functional layers, comprises polymerization of monomers from vapor phase under action of finely focused electron beam with energy 1 to 1000 keV followed by injection of monomer vapors at pressure from 10-4 to 10 torr. Electron beam is introduced into working chamber through a small opening in membrane, which enables avoiding scattering of electrons on membrane and, at the same time, maintaining monomer vapor pressure in working chamber high enough to ensure acceptable growth time for thickness (height) of image line. Preferred image applying conditions are the following: electron energy in electron beam 10 to 500 keV and monomer vapor pressure 0.001 to 10 torr. For electron beam diameter 50 nm, image width 100-150 nm can be obtained. When improving electron beam focusing, accessible electron beam diameter may be further diminished.

EFFECT: enabled high-resolution image of functional layers directly from monomer in single-step "dry" process without using any solvents.

2 cl, 2 dwg, 8 ex

FIELD: polymer materials.

SUBSTANCE: invention relates to polyethylene molding mass with multimodule molecular weight distribution intended to manufacture hollow articles such as gas tanks, canisters, barrels, and bottles using extrusion. Molding mass has density at least 0.940 g/cm3, contains low-molecular polyethylene with viscosity index 40-150 cm3/g in amount 30 to 60%, high-molecular copolymer of ethylene with another C4-C10-olefin with viscosity index 150-800 cm3/g in amount 30 to 65%, and ultrahigh-molecular polyethylene with viscosity index in the region 900-3000 cm3/g in amount 1 to 30%. Molding mass is prepared by cascade-based suspension polymerization.

EFFECT: increased degree of blowing and improved balance between hardness and fissuring resistance.

3 cl, 2 tbl, 5 ex

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