Composition for coats

FIELD: construction.

SUBSTANCE: composition for coats contains isocyanate prepolymer produced by interaction of 4,4'-diphenylmethanediisocyanate and oligodiendiol with molecular weight of 2800-3200, content of hydroxyl groups 0.88-1.3% at the ratio of isolcyanate and hydroxyl groups of 4:1 with content of isocyanate groups in prepolymer of 8.0-9.7%, wt parts - 15-70, base - rubber composition from low-molecular hydroxyl-containing rubber, plasticiser, filler, anti-ageing agent and pigment - 100, catalyst of urethane production - 0.05-0.15 and glycerin 0.7-3.0.

EFFECT: higher strength, hardness and relative extension of coats.

2 tbl

 

The invention relates to compositions for coatings based on liquid rubbers designed for covering sports grounds, floors, roofing and insulating materials in construction.

Known composition for coating comprising a low molecular weight hydroxyl-containing rubber is a copolymer of isoprene and butadiene, polyisocyanate, catalyst retinoblastoma. Additionally, the composition may contain a desiccant, a filler, a plasticizer, a low molecular weight alcohol, pigment, alkylphenolic antioxidant and rheological additive (see RF patent 2268279, C09D 175/14. Publ. 27.11.2006, bull. No. 2).

Known composition for coatings, including oligodontia copolymer of isoprene and butadiene, plasticizer, filler, trifunctionally low molecular weight alcohol, catalyst retinoblastoma, 2,4,6-tri-tertbutylphenol, the curing agent is a polyisocyanate, and optionally ethyl silicate (see RF patent 2186812, C09D 109/00. Publ. 10.08.2002).

The disadvantage of these compositions is the low strength of the solidified elastomeric coatings.

Known composition for coatings, including oligomerization, plasticizer, mineral filler, trifunctionally low molecular weight alcohol, catalyst retinoblastoma, 2,4,6-tri-tertbutylphenol, the polyisocyanate and ethyl silicate (see RF patent 2190002, C09D 175/08. Publ. 27.092002).

The disadvantage of this composition is the low strength of the elastomeric coating.

The closest solution of the present invention (the prototype) is the composition (see RF patent 2285026, C09D 175/14. Publ. 10.10.2006, bull. No. 28), comprising isocyanate curing agent is a polyisocyanate, catalyst retinoblastoma and the basis of hydroxyl-containing polybutadiene rubber with a molecular weight of 2100 and content of hydroxyl groups of 1.2 to 1.9%, or molecular weight 3000-3200 and content of hydroxyl groups of from 0.88 to 1.36%, or molecular weight 5000-5300 and the content of hydroxyl groups of 0.6-0.8% in the ratio of components, parts by weight:

The specified hydroxyl-containing polybutadiene rubber100
Isocyanate curing agent is a polyisocyanate10-36
Catalyst retinoblastomaof 0.001 to 3.0

Additionally, the composition may contain:

The desiccant (calcium oxide, gypsum, cement)5-20
Filler (chalk, talc, lime-dropout, kaolin)50-250
The plasticizer20-100
Low molecular weight alcohol with not less than two
hydroxyl groups, or a component of the AF-21-8
Alkylphenolic antioxidant0,5-2,0
Pigment0.5 to 10.0
The rheology modifier surfactant0,5-5,0

Coatings of this composition are characterized by inadequate mechanical properties. This is due to the fact that the polyisocyanate curing agent based diphenylmethanediisocyanate insufficiently compatible with hydrocarbon butadiene rubber polymer based composition. By mixing rubber non-polar bases and polar aromatic MDI unable to obtain a homogeneous system. The polyisocyanate as the curing agent is not efficient enough, which reduces the degree of cure and leads to a lower level of strength properties of the coating.

The aim of the invention is to improve the strength properties, especially the strength of the coating.

This objective is achieved in that the composition for coating, comprising ISOC antny hardener, catalyst retinoblastoma and the Foundation, as the isocyanate hardener contains a prepolymer obtained by the interaction of 4,4'-diphenylmethanediisocyanate and oligodontia with a molecular mass of 2800-3200, the content of hydroxyl groups from 0.88 to 1.3% when the ratio of isocyanate and hydroxyl groups of 4:1 with a content of isocyanate groups in the prepolymer 8.0 to 9.7 per cent, as the basis contains a rubber composition of low molecular weight hydroxyl-containing rubber, plasticizer, filler, antioxidant and pigment in the following ratio of the components of the rubber composition, parts by weight:

Low molecular weight hydroxyl-containing rubber100
The plasticizer60-180
Filler100-460
Antioxidant1-2
Pigment1-10

in addition to the glycerin in the following ratio of the components of the composition, parts by weight:

Rubber track100
Specified isocyanate give the free air 15-70
Glycerin0,7-3,0
Catalyst retinoblastoma0,05-0,15

The composition may contain rheological additive for improving wettability, dispersibility, which reduces the viscosity and improves the processing properties of the composition, for example, surfactant, oleic or stearic acid, organosiloxane modifiers.

The technical result, the increase in strength is achieved through the use of hardener isocyanate prepolymer based on liquid hydroxyl-containing butadiene rubber and 4,4'-diphenylmethanediisocyanate with a ratio of NCO and HE is 4, in combination with an additional cross-linking agent is glycerin. Molecular weight hydroxyl-containing rubber 2800-3200, the content of terminal hydroxyl groups in the rubber 0,88-1,3%, the content of isocyanate groups in the prepolymer 8.0 to 9.7 per cent.

Butadiene nature of the main chain isocyanate prepolymer hardener and diene molecular chains of the rubber composition can achieve full compatibility isocyanate hardener and base. As a result, when the mixture increases the homogeneity of the composition, increases the efficiency of crosslinking. In addition, higher mo is ekulama weight flexible diene chain between the isocyanate groups in the molecule of the curing agent allows you to move the mesh nodes, occur by the reaction of hydroxyl groups of rubber, glycerin - linking agent and isocyanate groups of the hardener. Sharing isocyanate prepolymer and glycerol leads to the formation of additional nodes stitching without loss of viscoelasticity and increase strength. However due to the large flexibility of cross-linked diene chains is their orientation and strengthening of the cured elastomer.

In addition, the increase in strength is obtained by using as a basis the rubber composition of the rubber, plasticizer, filler, pigment and antioxidant, in which all components are pre-dispersed to a homogeneous state until the introduction of the isocyanate prepolymer, catalyst retinoblastoma and glycerol as a crosslinking agent and prior to the beginning of structure formation in the composition.

The base is a rubber composition is a suspension of powdered fillers, plasticizers, pigments, antioxidants, moist collectors in the hydroxyl-containing liquid hydrocarbon-rubber SOPS-1K, krasol. SOPS-1K liquid copolymer of isoprene to butadiene ratio of isoprene and butadiene, 20:80, the content of hydroxyl groups of from 0.7 to 1.1%. Cresol - liquid butadiene rubber molecular weight of from 2000 to 5000 and a hydroxyl content of gr is PP 0,6-1,9%.

Rubber composition - based compositions for coatings produced commercially by THE 5775-004-22474 224-96 - polyurethane mastic; on THE other 5775-001-34702 890-99 - composition danurasana "Sportline"; on THE other 2513-560-22462037-98 - composition "Alastor".

To obtain the isocyanate prepolymer use of low molecular weight hydroxyl-containing rubber - krasol LBH-3000. The isocyanate prepolymer receive the following procedure: a sample of 200 g of the rubber content of 1.1% of hydroxyl groups are placed in a flask, heated to 80C. with stirring, maintained at this temperature under vacuum at a residual pressure of not higher than 10 mm Hg for 60 minutes, enter to 64.8 g of 4,4'-diphenylmethanediisocyanate and incubated at 80C under stirring for 2 hours. The resulting prepolymer is poured and cooled.

As a catalyst retinoblastoma use tertiary amines or ORGANOMETALLIC compounds, commonly used in polyurethane chemistry, such as dimethylbenzylamine, dibutylthiourea tin, octates tin, etc.

As fillers basics - rubber composition using chalk, talc, kaolin, rubber crumb, lime-fines, dolomite flour, lime and other

Plasticizers are chlorinated paraffin wax, alkyl(aryl)new esters of phthalic, phosphoric acid, oil of petroleum origin. For example, chloroparaffin CP-470, oil "Naloxol, di is utilitech.

As the antioxidant composition comprises predominantly colorless treatment of phenolic or organophosphorus compounds, such as 2,6-ditretbutyl-4-METHYLPHENOL (Agidol-1), 2,4,6-tetrachlorophenol, 2,2-methylene-bis-(4-methyl-6-tertbutylphenol) (product 2246).

To impart the desired color composition comprises pigments: iron oxide, chromium oxide, zinc oxide, titanium dioxide, organic azo and phthalocyanine pigments, phtalocyanine green, phtalocyanine blue and other

Conducted by the applicant's analysis of the prior art, including searching by the patent and scientific and technical information sources and identify sources that contain information about the equivalents of the claimed invention, allowed the Complainant to establish the absence of analogues characterized by signs, identical to all the essential features of the claimed invention. The definition of all identified unique prototype as most similar in essential characteristics of analog revealed a set of distinctive features with respect to the apparent technical result in the claimed compositions set forth in the claims. Therefore, the claimed invention meets the condition of "novelty."

The technical result of the increased strength of the coating when using isocyanate que the new prepolymer hardener and base in the form of a rubber composition in combination with glycerol as a crosslinking agent is not obvious, since the analysis of the known solutions do not give grounds to assume that the combination of these components should lead to improving the strength of the hardened products.

For the manufacture of compositions for coating use mixing equipment to ensure the homogenization of the isocyanate prepolymer, catalyst retinoblastoma and cross-linking agent is glycerin in the rubber composition.

A rubber composition is prepared beforehand by mixing and dispersion in rubber all components: powdered fillers, plasticizers, antioxidants, pigments, moist collectors. An industrial application of the components is dispersed in the rubber before milling degree not greater than 100 microns in a ball mill. The isocyanate prepolymer, glycerol and catalyst retinoblastoma are supplied with a rubber composition and put it directly before coating.

The invention is illustrated in the following example :

A portion of the rubber composition 200 g, prescription quantity of glycerol is placed in the mixer, ensuring uniform mixing or glass for hand mixing with a spatula. Stirred for 5 minutes until smooth, introducing a portion of isocyanate prepolymer, catalyst and again stirred for 5 minutes. Poluchennymi poured onto a flat shape and can stand up to full cure at room temperature. Control curing in terms of hardness. The curing time at 20-25C for 3-5 days, after which the hardness of the samples ceases to change. Similarly prepared composition on the prototype by sequential injection and mixing of rubber with all components. The compositions shown in table 1. Properties of samples of the coatings of the compositions are shown in table 2. Testing of the samples was carried out according to known standard methods.

From table 2 it is seen that the claimed composition provides coatings with higher complex characteristics. Increases the strength, elongation at break, hardness and elasticity. The increase of the complex mechanical properties is achieved by using the rubber composition of the substrate and curing it the isocyanate prepolymer in combination with glycerin.

The reduction of the number of isocyanate prepolymer leads to a decrease in strength due to the significant deviation of the ratio of NCO:OH of equimolecular and reduce the density of the stitching. When large amounts of prepolymer strength also decreases because of excess

60
Table 1
the compositions for coatings
Name the s components Composition, parts by weightA prototype RF Patent 2285026
123456789101112131415161718
1234567891011121314151617181920
1. Rubber composition composition, parts by weight, per 100 parts by weight of rubber: 100100100100100100100100100100100100100100100100100100
1) Rubber-Krasol LBH-3000100100100100100100100100100100100100100100100100100
rubber SOPS-1 100100
2) the Filler is chalk1608016016016090160160160400160160160400160400460160
- lime-dropout60606060220606060606060606060
- lime nagasena101010101010
3) Plasticizer: - chloroparaffin CP-47090 90
- oil "Naloxol"905080906090908016090901609018019090
- dibutyl80/td>
4) Pigment50,5551051225555555555
5) Antioxidant1,50,51,5121,51,51,51,51,51,51,51,51,522231,5
2. utilizator retinoblastoma 0,010,010,10,10,150,150,10,10,10,10,10,10,10,050,10,10,150,20,01
3. Glycerin0111111110,70,7222223342
4. The isocyanate prepolymer81315 192426344148191932405640567080
5. The polyisocyanate18
Notes:
1. In compounds 2, 7, and 8, 9 are used pigments phtalocyanine green and blue, respectively; consisting of 9 - yellow lightfastness; in compounds 4 and 5 - zinc oxide and titanium dioxide;in other compositions - pigment iron oxide red.
2. In compounds 5, 6, 17 used octoate tin, in other compositions - dibutyltin tin.
3. In compounds 8, 9 are used 2,4,6-tetrachlorophenol, part 10 - 2,2-methylene-bis-(4-methyl-6-tertbutylphenol), product 2246; in other compositions - 2,6-ditretbutyl-4-METHYLPHENOL (Agidol-1).
4. The isocyanate prepolymer in the composition 1-4 contained 9.7 percent NCO groups in the compounds 5-14 - 8.5% of NCO groups in the compounds 15-18 - 8,0% NCO groups.

Table 2
properties of the coatings of the compositions
IndicesCompositions compositions (see table 1)
12345678910111213141516 1718A prototype RF Patent 2285026
1. Conditional tensile strength, kgf/cm26142325272830303128183343382342181616
2. Elongation, %400230260250170150100110120220140170120180110100110110100
3. Hardness, shore a, usled20556063656468676057607072647272585554
4. Ball rebound resilience, %18303637403844444038404846463848393435

NCO groups, the tendency to foaming, the increase in the rigidity of the cured product.

The number and nature of the pigment does not affect the mechanical properties of the coatings, change only the color and intensity of color.

The number of glycerol - linking agent, as well as the number of isocyanate prepolymer has a significant influence on the properties of the coatings. At low content of glycerol decreases the degree of crosslinking, with a high content of glycerin is necessary to increase the amount of prepolymer, which leads to higher density of cross-linking to increase stiffness and loss of strength.

Catalyst retinoblastoma regulates the viability and curing speed without affecting the properties of the coating.

The increase in the degree of filling rubber composition creates difficulties when mixing and formation of the monolithic structure of the coating due to the large proportion of dry ingredients. The mixture is difficult when small quantities of plasticizers, and the upper limit of plasticizers limited compatibility with polymers.

The antioxidant has little effect on the properties of hardened coatings typically use within 1-2 parts by weight of a Smaller number reduces the resistance to thermal-oxidative aging, and large doses can lead to deterioration in strength due to the potential deactivation of the isocyanate groups of the prepolymer with hydroxyl groups of the antioxidant.

Thus, the advantage of the coatings of the proposed composition is the increase in strength is, elasticity, hardness, and relative elongation.

Composition for coating comprising isocyanate hardener, catalyst retinoblastoma and a base, characterized in that as isocyanate hardener contains a prepolymer obtained by the interaction of 4,4'-diphenylmethanediisocyanate and oligodontia with a molecular mass of 2800-3200, the content of hydroxyl groups of from 0.88 to 1.3% when the ratio of isocyanate and hydroxyl groups of 4:1 with a content of isocyanate groups in the prepolymer 8.0 to 9.7 per cent, as the basis contains a rubber composition of low molecular weight hydroxyl-containing rubber, plasticizer, filler, antioxidant and pigment in the following ratio of the components of the rubber composition, parts by weight:

low molecular weight hydroxyl-containing rubber100
the plasticizer60-180
filler100-460
antioxidant1-2
pigment1-10

in addition, the glycerol in the following ratio of the components of the composition, parts by weight:
rubber track100
specified isocyanate hardener15-70
glycerin0,7-3,0
catalyst retinoblastoma0,05-0,15



 

Same patents:

FIELD: chemistry.

SUBSTANCE: woven belt is a coated belt made by depositing a urethane-based composition onto the surface of the said belt, where the said composition contains nanoparticles of filler selected from a group consisting of nanoparticles of clay, soot, silicon carbide, metal oxides and combinations of said nanoparticles. Content of nanoparticles of filler in the coating ranges from 0.01 to 10 wt %.

EFFECT: obtained belt increases resistance to bending fatigue, resistance to development of cracks, resistance to joining of grooves and wear resistance of urethane coatings of belts and shafts, increases water resistance and oil resistance of belts and shafts with urethane coating.

18 cl, 2 ex, 4 tbl, 6 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a water-soluble coating composition containing a) polyol, b) polyisocyanate cross-linking agent and c) a compound with a thiol functional group in which molar ratio of isocyanate groups to thiol groups lies between 1:0.0001 and 1:0.4. The invention also relates to use of the coating composition as a transparent or pigmented external coating, basic coating, filler, prime coating or binding material, in painting or repainting automobiles and large vehicles, and to a set for preparing the coating composition.

EFFECT: obtaining a composition which provides a balance between high rate of solidification, long life and good appearance of the coating film made from the said composition.

17 cl, 3 dwg, 7 tbl

FIELD: chemistry.

SUBSTANCE: present invention relates to obtaining new aspartates. Aspartates are obtained by reacting di- or polyamine with an unsaturated ester and then by reacting the obtained product with maleinimide.

EFFECT: obtaining new aspartates and their use as reactive components for polyiisocyanates in two-component compositions for polyurethane coatings.

4 cl, 3 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to undercoating compositions containing at least one polyurethane prepolymer A with isocyanate groups; at least one aliphatic polyisocyanate B; at least one aromatic polyisocyanate C; at least one reaction product D, obtained from at least one epoxysilane and at least one aminosilane with quantitative ratio of atoms of active hydrogen of the amine to the number of epoxy groups of the epoxysilane equal to 3:1-1:3, or at least one epoxysilane and at least one mercaptosilane with quantitative ratio of mercapto groups to epoxy groups equal to 1.5:1-1:1.5, with content of product D equal to 0.5-15 wt % of the total weight of A+B+C+D. The invention also relates to use of the undercoating composition as an undercoating for adhesives, sealants and floor coatings.

EFFECT: good adhesion to problematic substrates with long open time.

24 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to polymer construction compositions and can be used for making sports coatings. The coating is formed by depositing a composition onto a hard base, where the composition contains an isocyanate prepolymer, a mixture of chalk and caustic lime in ratio of 5:1, a mixture of chlorinated paraffin wax, low-molecular polyethylene and calcium oxide in ratio of 1:2:0.5, a catalyst, low-molecular tri-functional alcohol, chlorinated paraffin wax, plasticiser and holding for 20-24 hours. A second layer is deposited, based on a polymer composition which contains oligodienediol with molecular weight of 2000-5000 and 0.7-1.7% content of hydroxyl groups, a plasticiser, mineral filler, a mixture of chlorinated paraffin wax, low-molecular polyethylene and calcium oxide in ratio of 1:2:0.5, low-molecular tri-functional alcohol, polyisocyanate, catalyst, 2,4,6-tri-tertbutylphenol, ethyl silicate and kept for 20-24 hours again. A third layer of polymer composition is deposited, which contains a polysulphide oligomer, a plasticiser, zinc oxide, rubber crumbs with particle size of 3 mm and 1 mm in ratio of 3:1, vulcanising paste No.9, diphenylguanidine and subsequently held for 20-24 hours.

EFFECT: improved dynamic and elastic-hysteresis properties, hydrolytic and thermal oxidative stability of the coating.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to polymer construction compositions and can be used for making sports coatings. The coating is formed by depositing a composition onto a hard base, where the composition contains an isocyanate prepolymer, a mixture of chalk and caustic lime in ratio of 5:1, a mixture of chlorinated paraffin wax, low-molecular polyethylene and calcium oxide in ratio of 1:2:0.5, a catalyst, low-molecular tri-functional alcohol, chlorinated paraffin wax, plasticiser and holding for 20-24 hours. A second layer is deposited, based on a polymer composition which contains oligodienediol with molecular weight of 2000-5000 and 0.7-1.7% content of hydroxyl groups, a plasticiser, mineral filler, a mixture of chlorinated paraffin wax, low-molecular tri-functional alcohol, polyisocyanate, catalyst, 2,4,6-tri-tertbutylphenol, ethyl silicate and kept for 20-24 hours. A third layer of polymer composition is deposited, which contains a polysulphide oligomer, a plasticiser, zinc oxide, rubber crumbs with particle size of 3 mm and 1 mm in ratio of 3:1, vulcanising paste No.9, diphenylguanidine, oligodienediol with molecular weight of 2000-5000 and 0.7-1.7% content of hydroxyl groups, low-molecular tri-functional alcohol, polyisocyanate, catalyst and subsequently holding for 20-24 hours.

EFFECT: improved dynamic and elastic-hysteresis properties, hydrolytic and thermal oxidative stability of the coating.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to polymer construction compositions and can be used for making sports coatings. The coating is formed by depositing a composition onto a hard base, where the composition contains an isocyanate polyester prepolymer, a mixture of chalk and caustic lime in ratio of 5:1, a mixture of chlorinated paraffin wax, low-molecular polyethylene and calcium oxide in ratio of 1:2:0.5, a catalyst, low-molecular tri-functional alcohol, chlorinated paraffin wax, plasticiser and holding for 20-24 hours. A second layer is deposited, based on a polymer composition which contains oligodienediol with molecular weight of 2000-5000 and 0.7-1.7% content of hydroxyl groups, a plasticiser, mineral filler, a mixture of chlorinated paraffin wax, low-molecular polyethylene and calcium oxide in ratio of 1:2:0.5, low-molecular tri-functional alcohol, polyisocyanate, catalyst, 2,4,6-tri-tertbutylphenol, ethyl silicate and kept for 20-24 hours. A third layer of polymer composition is deposited, which contains a polysulphide oligomer, a plasticiser, zinc oxide, rubber crumbs with particle size of 3 mm and 1 mm in ratio of 3:1, vulcanising paste No.9, diphenylguanidine, isocyanate polybutadiene prepolymer, low-molecular tri-functional alcohol, catalyst and subsequently held for 20-24 hours.

EFFECT: improved dynamic and elastic-hysteresis properties, hydrolytic and thermal oxidative stability of the coating.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to polymer construction compositions and can be used for making sports coatings. The coating is formed by depositing a composition onto a hard base, where the composition contains an isocyanate polyester prepolymer, a mixture of chalk and caustic lime in ratio of 5:1, a mixture of chlorinated paraffin wax, low-molecular polyethylene and calcium oxide in ratio of 1:2:0.5, a catalyst, low-molecular tri-functional alcohol, chlorinated paraffin wax, plasticiser and holding for 20-24 hours. A second layer of polymer composition is deposited, which contains oligodienediol with molecular weight of 2000-5000 and 0.7-1.7% content of hydroxyl groups, a plasticiser, mineral filler, a mixture of chlorinated paraffin wax, low-molecular polyethylene and calcium oxide in ratio of 1:2:0.5, low-molecular tri-functional alcohol, polyisocyanate, catalyst, 2,4,6-tri-tertbutylphenol, ethyl silicate and kept for 20-24 hours. A third layer of polymer composition is deposited, which contains a polysulphide oligomer, a plasticiser, zinc oxide, rubber crumbs with particle size of 3 mm and 1 mm in ratio of 3:1, vulcanising paste No.9, diphenylguanidine, isocyanate polybutadiene prepolymer, low-molecular tri-functional alcohol, catalyst, oligodienediol with molecular weight of 2000-5000 and 0.7-1.7% content of hydroxyl groups and subsequently holding for 20-24 hours.

EFFECT: improved dynamic and elastic-hysteresis properties, hydrolytic and thermal oxidative stability of the coating.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to polymer construction compositions and can be used for making sports coatings. The coating is formed by depositing a composition onto a hard base, where the composition contains an isocyanate prepolymer, a mixture of chalk and caustic lime in ratio of 5:1, a mixture of chlorinated paraffin wax, low-molecular polyethylene and calcium oxide in ratio of 1:2:0.5, a catalyst, low-molecular tri-functional alcohol, chlorinated paraffin wax, plasticiser and holding for 20-24 hours. A second layer of polymer composition is deposited, which contains oligodienediol with molecular weight of 2000-5000 and 0.7-1.7% content of hydroxyl groups, a plasticiser, mineral filler, a mixture of chlorinated paraffin wax, low-molecular polyethylene an calcium oxide in ratio of 1:2:0.5, low-molecular trifunctional alcohol, polyisocyanate, catalyst, 2,4,6-tri-tertbutylphenol, ethyl silicate and kept for 20-24 hours. A third layer of polymer composition is deposited, which contains oligodienediol with molecular weight of 2000-5000 and 0.7-1.7% content of hydroxyl groups, a plasticiser, mineral filler, rubber crumbs with particle size of 3 mm and 1 mm in ratio of 3:1, polyisocyanate, low-molecular tri-functional alcohol, catalyst, 2,4,6-tri-tertbutylphenol, ethyl silicate and subsequently holding for 20-24 hours.

EFFECT: improved dynamic and elastic-hysteresis properties of the coating.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to polyurethane composition used as a protective coating. The composition contains the following in pts. wt: 770 - polytetramethylene etherglycol with molecular weight of 1950, 200 - 4,4'-diphenylmethanediisocyanate, 80-100 - dimethylformamide, 36 - hydroxyl-containing compound, 100-120 - methylphosphite borate and 15-18 - glycidalmethacrylate. A prepolymer is synthesised first as an initial component by reacting polytetramethylene etherglycol and 4,4'-diphenylmethanediisocyanate in molar ratio OH:NCO-groups equal to 1:2.

EFFECT: composition has better complex properties, specifically high fire- and heat resistance and good physical and mechanical properties, eg high strength and extensibility.

2 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to polyurethane composition used as a protective coating. The composition contains the following in pts. wt: 770 - polytetramethylene etherglycol with molecular weight of 1950, 200 - 4,4'-diphenylmethanediisocyanate, 80-100 - dimethylformamide, 36 - hydroxyl-containing compound, 100-120 - methylphosphite borate and 15-18 - glycidalmethacrylate. A prepolymer is synthesised first as an initial component by reacting polytetramethylene etherglycol and 4,4'-diphenylmethanediisocyanate in molar ratio OH:NCO-groups equal to 1:2.

EFFECT: composition has better complex properties, specifically high fire- and heat resistance and good physical and mechanical properties, eg high strength and extensibility.

2 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to technology of obtaining films based on hydroxyl-containing polymers of increased fire resistance, particularly, to composition for obtaining films and can be applied in different areas of industry and agriculture for fireproof modification of materials based on them. Composition includes in weight fraction: 1.0-5.0 polyvinyl alcohol, 95.0-99.0 water, 0.5 methhylphosphate borate and 2.0 plasticiser. As plasticiser applied is glycerin, ethylene glycol or diethylene glycol.

EFFECT: invention ensures obtaining from said composition fire resistance films with increased durability.

2 tbl, 3 ex

FIELD: polymers.

SUBSTANCE: invention relates to methods for preparing powdery hygroscopic polymeric compositions. Invention proposes the powdery hygroscopic polymeric composition comprising a water-absorbing polymer (A) of cross-linked structure prepared by polymerization of unsaturated monomer comprising an acidic group and comprising acrylic acid and/or its salt as the main component. The composition comprises particles of size in limits from less 850 to 150 μm (but not including 850 μm) and their amount is 90 wt.-%, not less, of all material, and it comprises tetra- or the more functional and unmodified polyol (B) representing sugar alcohol showing functionality from 4 to 30, at least, on surfaces and taken in the amount from 0.01 to 20 wt.-%. Invention proposes variants of this composition and a method for its preparing. Invention provides development of powdery hygroscopic polymeric composition showing the low content of fine powder and possessing the excellent penetrability for liquids and ability to absorb liquid.

EFFECT: improved, enhanced and valuable properties of composition.

17 cl, 8 tbl, 3 dwg, 15 ex

FIELD: chemical technology, in particular plasticized composition based on polyvinylchloride for cable plasticate.

SUBSTANCE: claimed composition contains polyvinylchloride, dioctylphtalate, chloroparaffin, tribasic lead sulfate, calcium stearate, antimony trioxide, chalk, diphenylolpropane, carbon black and additionally contains metal-containing lubricant with acidic number at most 30 mg KOH/g. Lubricant is obtained by interaction of alpha-branched saturated monocarboxylic C10-C28-acids with polyhydric alcohol at 180-220°C in molar ratio of 1:(1-2) in presence of bivalent metal oxides: CaO, PbO, ZnO, MgO, BaO or two-component mixture thereof in ratio of 0.25-1:0.5-1, in amount of 0.5-2.0 mass % calculated as total reaction mass. As polyhydric alcohol ethylene glycol, glycerol, polyglycerol, which represents slop from glycerol distillation, are used.

EFFECT: articles with increased extension strength, elongation, heat resistance, improved appearance, decreased brittle point; resin composition assortment expansion.

2 cl, 16 ex, 1 tbl

The invention relates to the oil and gas industry and is used to limit water production through containment casing, the elimination of cross-flows and isolation supply interlayers in oil and gas wells
The invention relates to antifriction self-lubricating compositions based on polyethylene and can be used in various fields of mechanical engineering, instrument engineering, aircraft and shipbuilding, in particular for the manufacture of shell bearings, sliding guides without lubrication in the air

The invention relates to the production of firecells plastics (acrolaw) used in the production of packaging materials with antimicrobial activity, including extrusion and cast film, roll materials, consumer packaging (molded, thermoformed, die-inflatable), and other items in contact with food (grease, bread bins and other)

The invention relates to fire-retardant materials intended to protect the flexible element structures from fire in aircraft engineering, shipbuilding

FIELD: chemical technology, in particular plasticized composition based on polyvinylchloride for cable plasticate.

SUBSTANCE: claimed composition contains polyvinylchloride, dioctylphtalate, chloroparaffin, tribasic lead sulfate, calcium stearate, antimony trioxide, chalk, diphenylolpropane, carbon black and additionally contains metal-containing lubricant with acidic number at most 30 mg KOH/g. Lubricant is obtained by interaction of alpha-branched saturated monocarboxylic C10-C28-acids with polyhydric alcohol at 180-220°C in molar ratio of 1:(1-2) in presence of bivalent metal oxides: CaO, PbO, ZnO, MgO, BaO or two-component mixture thereof in ratio of 0.25-1:0.5-1, in amount of 0.5-2.0 mass % calculated as total reaction mass. As polyhydric alcohol ethylene glycol, glycerol, polyglycerol, which represents slop from glycerol distillation, are used.

EFFECT: articles with increased extension strength, elongation, heat resistance, improved appearance, decreased brittle point; resin composition assortment expansion.

2 cl, 16 ex, 1 tbl

Up!