The latex impregnation

 

The invention relates to a water-dispersible compositions for impregnation of fabrics. Impregnation contains latex is the best choice, water, cellulose ether, as the main film-forming latex of vinyl chloride with vinylidenechloride and maleic acid Vdvhmk as surfactants polyoxyethylene ether of alkylphenol OP-7 or OP-10, as a plasticizer - esters of alcohols and dicarboxylic acids, as additional film-forming agent is a urea-formaldehyde resin KF-MT and as a water-repellent agent is 45-50% aqueous solution of ethylsilicate sodium NGL - 10 or potassium methyl siliconate NGL-11. table 2.

The invention relates to a water-dispersible compositions for impregnation of fabrics.

Known binder for impregnation of glass fiber (copyright certificate №1721062, 08 L 31/04) containing polyvinyl acetate dispersion and additive in the following ratio, wt. hours: polyvinyl acetate dispersion (50% concentration) 2-3; 50% aqueous solution of salts of lignosulphonic acids 9-11; water 86-89. The disadvantage of this binder is a low resistance.

Known composition used for izgotovlenie titanium in the following ratio of components, wt.%: the latex of vinyl chloride with vinylidenechloride (in terms of dry residue) 35,0-56,1; polyvinyl alcohol 0,89-1,92; titanium dioxide 17,7-48,0 (copyright certificate №1634679, 08 J 5/24). The disadvantage of this composition is the use of expensive raw materials and low resistance,

Closest to the claimed invention by the combination of features is a water-dispersible composition for impregnation of glass cloth (copyright certificate №1821482, 08 L 97/02 ) on the basis of the best choice latex containing 5% aqueous solution of polyvinyl alcohol, in the following ratio, wt.%:

Latex is the best choice (on dry matter) of 33.6-37,6

Polyvinylalcohol

(on dry matter) of 0.3-0.8

Water the Rest

The disadvantage of this composition is insufficient frost films at low temperatures (-40C), and low resistance fiberglass obtained based on it.

The aim of the invention is to improve the water resistance of fiberglass, based on the impregnating composition, and frost resistance of the film.

The result is achieved that the latex impregnation of fabrics, containing latex is the best choice SCS-GP or SC is cellulose and others), as the main film-forming latex of vinyl chloride with vinylidenechloride and maleic acid Vdvhmk as surfactants polyoxyethylene ether of alkylphenol OP-7 or OP-10, as a plasticizer - esters of alcohols and dicarboxylic acids (dibutyl phthalate, dioctylphthalate, dibutylsebacate), as additional film-forming agent is a urea-formaldehyde resin KF-MT and as a water-repellent agent is 45-50% aqueous solution of ethylsilicate sodium NGL-10 or potassium methyl siliconate NGL-11 in the following ratio, wt.%:

The cellulose ether (sodium carboxymethylcellulose, acetylcellulose and so on) in terms of 100% content of the basic substance 0,1-0,4

Hydrophobic agent NGL-10, NGL-11 0,05-0,5

Polyacetylenic ether of alkylphenol OP-10, OP-11 0,01-0,05

The latex of vinyl chloride with vinylidenechloride and maleic acid Vdvhmk 35,0-55,0

Latex is the best choice SCS-GP, SCS-5,0-15,0

Esters of alcohols and dicarboxylic acids (dibutyl phthalate, dioctylphthalate, dibutylsebacate) 0,8-1,0

Urea-formaldehyde resin KF-MT 5,0-15,0

Water To 100

In the proposed claims recipe best choice latex T of the prototype, that contains as a main film-forming agent that improves the frost resistance of the film, the latex of a copolymer of vinyl chloride with vinylidenechloride and maleic acid, which is a product of the joint polymerization of a mixture of monomers with a mass fraction of chloride 33-35, vinylidenechloride 65-67 and maleic acid 1-2.

As an additional agent that enhances the water resistance of an impregnating composition used urea-formaldehyde resin, which is a product of polycondensation of urea and an aqueous solution of urea and formaldehyde. As surface-active substances which improve the wetting ability of impregnation used polyoxyethylene esters of alkylphenol OP 7, OP - 10, which represents a mono - and dialkylphenols esters of glycol-based polymetacrylate formulas

WithnH2n+1With6H4O(C2H4O)mN, where n=8-10 and m=6-7 for OP-7 and m=10-12 for OP-10.

To give the finished product (GRP) water-repellent properties to the composition of the latex impregnation introduced water-repelling liquid NGL representing 45-50% aqueous solution of ethylsilicate sodium NGL-10 or potassium methyl siliconate NGL-11. Dled entered esters of alcohols and dicarboxylic acids.

Impregnation of the latex prepared according to the following technology.

1. Preparation of semi-finished product.

Preparation of semi-finished product is made by dissolving cellulose ethers in water at a temperature of 35C for 1.5 h and the mixture obtained hydrolysate with the following components: polyoxyethylene ether of alkylphenol - auxiliary substance OP-7 or OP-10 aqueous solution of methyl - or ethylsilicate sodium.

2. The plasticization of latex Vdvhmk.

The plasticization of the latex is carried out by mixing thereof with esters of alcohols and dicarboxylic acids at a temperature of 35-40With up to a complete matching products.

3. Preparation of latex impregnation.

Manufacturer of latex impregnation is carried out by mixing the cake mix, plasticized latex Vdvhmk, resin carbamide-formaldehyde and the best choice latex for 30 minutes.

Example.

For the preparation of a semifinished product of 0.2 weight.h. sodium-carboxymethylcellulose enter 33.7 weight.h. water and stirred for 1.5 h at a temperature of 35With, after which heating is off and the load consistently 0.05 weight.h. excipients OP-7 and 0, is alimera of vinyl chloride with vinylidenechloride and maleic acid 0.8 weight.h. dibutyl phthalate and mass mixing at a temperature of 35-40With no less than 3 hours

Getting latex impregnation is carried out by mixing 45,8 weight.h. plasticized latex, 34,2 weight.h. semi-finished product with a 10 weight.h. the best choice latex and 10 weight.h. resin urea-formaldehyde.

Technology of preparation of the latex impregnation all the same; the ratio of the components shown in table. 1. For comparative tests of the used part of the famous water-dispersion composition for impregnation of glass (composition 14).

The quality of the latex impregnation and the prototype was evaluated by the following physical properties: viscosity of the composition VZ-246 with the nozzle diameter of 4 mm at a temperature of (20±0,2)With the hardness of the film Ratnikova device type TML, the permeability of the film, the film strength in bending at +20C and -40With water resistance and weather resistance GRP (PCT 250 L), obtained on the basis of impregnating compositions. Indicators of the strength of the film in bending", "water film", "thermal stability of the films was determined directly using the film obtained from the composition, the pre is determined only..." for compounds 1-5 and 14) were determined, using fiberglass brand PCT 250L derived from fiberglass e/3-200. The data presented in table.2.

In table.1 in compounds 1-5 contents of components corresponds to the intervals recommended by the claims. In compounds 6, 8 latex taken respectively in the lower and more featured by the invention of the number, and the liquid NGL-10,11 - more featured (composition 6) and less featured (composition 7) number.

Sodium carboxymethylcellulose is taken in part 7 more but with 10 less featured by the invention of the number.

Compounds 8 and 9, 11 and 12, 12 and 13, 10 and 8 characterize, respectively, the limits on the best choice latex, auxiliary substance OP-10, plasticizer (dibutyl phthalate) and urea-formaldehyde resin.

In table.2 shows the properties of the investigated compounds.

From table.2 shows that the optimal characteristics of the impregnating composition is obtained when the recommended formula of the invention the ratios of components.

The change in the number of latex-recommended formula of the invention, leads to deterioration of the waterproof performance and the deterioration of film strength at low temperatures (composition 6); and the increase affects the elasticity of the film as in 8).

Accordingly, the deviation amount of the other components recommended by the claims ratio results:

- increasing the number of sodium-carboxymethylcellulose ( part 7 ) - to increase the viscosity and reduce the permeability of the film and decrease (part 10) - deterioration of water resistance fiberglass;

- reducing the amount of liquid NGL-10, 11 (7) leads to the deterioration of the permeability of the film and increase (part 11) - to the poor wettability of the fabric impregnation;

- increasing the number of auxiliary substances OP-7, 10 (11) leads to increased foaming and non-uniformities in the film (the formation of craters), and decreasing to poor wettability of the surface of glass and receiving a nonuniform coating (12);

- decrease the best choice latex (composition 8) leads to a decrease in the resistance of fiberglass and elasticity of the film, and the increase - to increase drying time, i.e., the deterioration of the technological properties of impregnation (experiment 9);

- increase in the amount of resin urea-formaldehyde more than the recommended formula of the invention reduces the elasticity of the film and decreasing to a sharp deterioration of the water resistance of shadchen elasticity of the film, increasing to poor wettability of glass and the formation of an inhomogeneous coating.

When exact adherence to recommended claims ratios of components (compounds 1-5) impregnating latex is not inferior to the prototype in heat resistance, hardness, film strength in bending, permeability of the film after drying at 20C.

Rekomenduemyj the claims impregnating composition in comparison with the prototype has a superior indicator of the permeability of the film after drying at 100"(The prototype of 15 days, the recommended composition - 20 days) and is far superior to the prototype metrics "the strength of the film bending at minus 40±2(Prototype - 5 mm, the recommended composition - 1 mm), the resistance of fiberglass at a pressure of 0.2 kg/cm2" (prototype - 0,3 h, recommended composition - 6 hours) and the protective properties of the film under the conditions of a temperate climate "(prototype - 15 cycles, which corresponds to 2 years of operation, the recommended composition - 22 cycle, which corresponds to 3 years of operation).

The results obtained indicate that the proposed composition of the latex impregnation produces a product with more high the floor, on the basis of which receive fiberglass, having a higher weatherability and water resistance.

Claims

The latex impregnation of fabrics, containing latex is the best choice and water, characterized in that it further comprises a cellulose ether, as the main film-forming latex of vinyl chloride with vinylidenechloride and maleic acid Vdvhmk, as surfactant - polyoxyethylene ether of alkylphenol OP-7 or OP-10, as a plasticizer - esters of alcohols and dicarboxylic acids, as additional film-forming agent is a urea-formaldehyde resin KF-MT and as a water-repellent agent is 45-50%aqueous solution of ethylsilicate sodium NGL-10 or potassium methyl siliconate NGL-11 in the following ratio, wt.%:

The cellulose ether (in recalculation on 100%

the basic substance content) of 0.1-0.4

Hydrophobic agent NGL-10,

NGL-11 0,05-0,5

Polyoxyethylene ether of alkylphenol

OP-10, OP-7 0,01-0,05

The latex of vinyl chloride with vinylidenechloride

and maleic acid Vdvhmk 35,0-55,0

Latex is the best choice 5,0-15,0

Esters of alcohols and dicarboxylic

to the

 

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