Coating composition

FIELD: chemistry.

SUBSTANCE: coating composition contains an isocynate prepolymer obtained by reacting 4,4'-diphenylmethane diisocayanate and oligobutadiene diol with molecular weight 2800-3200, content of hydroxyl groups of 0.88-1.3% with ratio of isocynate to hydroxyl groups equal to 4:1, with content of isocyanate groups in the prepolymer equal to 8.0-9.7%, a base - rubber composition of low-molecular hydroxyl-containing rubber, a plasticiser, filler, an anti-ageing agent and a pigment, a urethane-formation catalyst and 3,3'-dichloro-4,4'-diaminodiphenyl methane.

EFFECT: high strength, hardness and relative elongation of coatings.

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. 27.9.2002).

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 two1-8
hydroxyl groups, or a component of the AF-2
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 oligonucleotide 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 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
Filler100-440
Antioxidant1-2
Pigment1-10

and additionally 3,3'-dichloro-4,4'-diaminodiphenylmethane in the following ratio of the components of the composition, parts by weight:

Rubber track100
The specified Izolan the private hardener 14-45
3,3'-dichloro-4,4'-diaminodiphenylmethane1-3
Catalyst retinoblastomaof 0.01-0.1

The composition may contain rheological additive for improving wettability, dispersibility, which reduces the viscosity and improves the processing properties of the composition, such as surfactants, 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 3,3'-dichloro-4,4'-diaminodiphenylmethane. 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. Furthermore, the high molecular 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, amino 3,3'-dichloro-4,4'-diaminodiphenylmethane and isocyanate groups of the hardener. However due to the large flexibility of cross-linked diene chains is their orientation and strengthening of the cured elastomer. The combination of the isocyanate prepolymer and 3,3'-dichloro-4,4'-diaminodiphenylmethane leads to the formation of additional nodes stitching without loss of viscoelasticity and increase strength.

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 3,3'-dichloro-4,4'-diaminodiphenylmethane 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 the th weight of from 2000 to 5000, with the content of hydroxyl groups of from 0.6 to 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 80°C. 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 80°C 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, the R, chloroparaffin CP-470, oil "Naloxol", dibutyl phthalate.

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 to the composition include 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 the most similar in essential features analogue, 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 increasing PR is knosti coverage when using isocyanate diene 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 3,3'-dichloro-4,4'-diaminodiphenylmethane 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. A prepolymer isocyanate, 3,3'-dichloro-4,4'-diaminodiphenylmethane and catalyst retinoblastoma are supplied with a rubber composition and put it immediately before preparation of a composition for coating and its application on the ground.

The invention is illustrated by the following example.

A portion of the rubber composition 200 g, prescription number 3,3'-dichloro-4,4'-diaminodiphenylmethane placed in the mixer, ensuring uniform mixing, or glass for hand mixing with a spatula. Stirred for 5 minutes is about the homogeneous state, enter a portion of isocyanate prepolymer, catalyst and again stirred for 5 minutes. The resulting mixture is 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 20-25°C 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 3,3'-dichloro-4,4'-diaminodiphenylmethane.

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 coloring strength is b also decreases because of the excess 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 amount of 3,3'-dichloro-4,4'-diaminodiphenylmethane - linking agent, as well as the number of isocyanate prepolymer has a significant influence on the properties of the coatings. At low content of 3,3'-dichloro-4,4'-diaminodiphenylmethane decreases the degree of crosslinking, with a large content of 3,3'-dichloro-4,4'-diaminodiphenylmethane need 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 of mouthpiece to the deterioration of strength due to possible 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 to increase the strength, elasticity, hardness, and relative elongation.

1,5
Table 1
The compositions for coatings
Name of the componentComposition, massA prototype RF Patent 2285026
123456789101112131415161718
12345678 91011121314151617181920
1. Rubber composition composition, parts by weight, per 100 parts by weight of rubber
1) Rubber-Krasol LBH-3000
100100100100100100100100100100100100100100100100100100
100100100100100100100100100100 100100100100100100100
rubber SOPS-1100100
2) the Filler is chalk80100160220160160160160160160160160160160 400380500160
- lime-dropout60606022060606060606060606060
- lime nagasena10102020
3) Plasticizer:
- chloroparaffin CP-9090
470/td>
- oil "Naloxol"50609090909090909090909016018022090
- dibutyl90
4) Pigment0,555101221010555555555
5) Antioxidant0,511,51 51,51,5222221,51,51,51,51,523

Continued table 1
1234567891011121314151617181920
2. The catalyst for the urethane-
education
0,150,10,010,010,010,010,10,10,010,010,010,010,010,010,010,010,010,001 0,01
3. 3,3'-dichloro-4,4'- diaminodiphenyl-methane0,511122222333412223
4. The isocyanate prepolymer91416191619243033192936451523192449
5. The polyisocyanate 22
6. Glycerin3
Notes:
1. In compounds 1, 5, and 7, 6 used pigments phtalocyanine green and blue, respectively; comprising 11 lightfastness yellow; in compounds 3 and 4 zinc oxide and titanium dioxide; the rest is the composition of the pigment iron oxide red.
2. In the compositions 1-2 used octoate tin, in other compositions dibutyltin tin.
3. In compounds 1-6 used 2,4,6-tetrachlorophenol, comprising 7-13 and prototype - 2,6-ditretbutyl-4-METHYLPHENOL (Agidol-1); in other structures - product 2246.
4. The isocyanate prepolymer in the composition of 1-2 3-14 contains, respectively, of 8.0% and 8.5% of the NCO groups in the compounds 15-18 8.5% of NCO groups; in other compositions of 9.7% 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/cm28172927262838363425313022223219271416
2. Elongation, %32034026022029028020015014020013011080220200140140120100
3. Hardness, shore a, usled40445456555762656664677073546058605754
4. Ball rebound resilience, %18364240404144424239403836373935363235

Composition for coating comprising isocyanate hardener, catalyst retinoblastoma and the basis notable as isocyanate hardener contains a prepolymer obtained by the interaction of 4,4'-diphenylmethanediisocyanate and oligonucleotide 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
Filler100-440
Antioxidant1-2
Pigment1-10

and additionally 3,3'-dichloro-4,4'-diaminodiphenylmethane in the following ratio of the components of the composition, parts by weight:
Rubber track100
Specified isocyanate hardener 14-45
3,3'-dichloro-4,4'-diaminodiphenylmethane1-3
Catalyst retinoblastomaof 0.01-0.1



 

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23 cl, 5 tbl, 24 ex

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9 cl, 1 dwg

FIELD: printing industry.

SUBSTANCE: composition contain the following components a) from 1 to 30 wt % per total mass of organic dye pigment composition, b) from 1 to 20 wt % of one or several binding substances, c) from 0 to 20 wt % of starch, d) from 0 to 10 wt % of anion direct dye, e) from 0 to 10 wt % of one or several auxiliary substances and f) water of up to 100%. Method for application of this composition and its use are also described.

EFFECT: improved resistance of organic pigments penetration and increased saturation of painting on paper.

8 cl, 4 tbl, 76 ex

FIELD: construction.

SUBSTANCE: invention pertains to the area of construction operations and may be employed for protection from dehydration of new concrete in construction of highways and airdromes, ameliorative and water engineering. Film-forming material for maturing of newly placed concrete contains styrene-butadiene latex "БС" 50, stiffener - sodium carboxymethyl cellulose, stabiliser ethoxylated octyl phenol "ОП-10", filler - kaolin clay, dispersing agent "НФ", adhesive additive - methylol melamine derivations mixture and water, with the following ratio of components, wt %: above said latex - 57-66, said stiffener - 0.18-0.35, said stabiliser - 0.60-0.65, kaolin clay - 14.3-16.0, dispersing agent "НФ" - 0.73-0.80, said adhesive additive - 0.03-0.04, water - the rest.

EFFECT: getting environmentally safe low toxic film-forming material, reduced specific moisture permeability of the film, enhanced strength of concrete.

6 tbl

FIELD: chemistry.

SUBSTANCE: composition includes binding agent - modified with hexamethylentetramine mixture of tal pitch and technical lignosulfonates in presence of catalyst - zinc oxide, tal modified colophony, pigments - aluminium powder and titanium dioxide, zinc phosphate, neutralising filler - calcium oxide and/or calcium hydroxide and/or chalk and/or microcalcite and/or microtalc, hardener- polyethylenpolyamine and organic solvent. Composition is obtained by first mixing (modification) mixtures of tal pitch, technical lignosulfonates and hexamethylentetramine at temperature 120-140°C in presence of catalyst - zinc oxide. Mixture is cooled, tal modified colophony, pigments are added. Neutralising filler, hardener and solvent are added.

EFFECT: increased light-resistance of coating, extension of colour range and quick drying.

3 cl, 1 tbl

FIELD: hydraulic insulating materials for hydraulic insulation and corrosion prevention of concrete, metal and reinforced concrete structural surfaces.

SUBSTANCE: claimed composition contains: butadiene-styrene thermoelastomer, diepoxy resin, filler (carbon black), solvent (toluene), pigment filler, containing aluminum and iron hydroxides and additionally indene-coumarone resin, waterproofing agent (liquid polymethylsiloxane), and stabilizer.

EFFECT: composition with high adhesion to concrete and metal surface and improved strength.

2 tbl

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