RU1807067C - Composition for adhesion and repair of rubber and textile materials - Google Patents

Abstract

Use: for gluing and repairing rubber-textile materials. The inventive adhesive composition contains, wt.%: Chloroprene rubber 6.80-7.22, burnt magnesia 0.48-0.51, zinc white 0.34-0.36, sulfur 0.06-0.07, pine rosin 0.34-0.36.70% solution in ethyl acetate of polyethylene terephthalate modified with trimethylolpropane, pentaerythritol or glycerol in a mass ratio of 1: 0.5 with a hydroxyl number of 288.0-556.0 mg KOH / g, melting point 56- 120 ° C 6.25-11.76, nephras 26.74-28.41, ethyl acetate 53.48-56.82. Adhesive characteristics: more than 30 days, bonding strength 3.9 kgf / cm. 3 tab. CO C

Description

FIELD OF THE INVENTION This invention relates to adhesives, and in particular to chloroprene rubber adhesives, which are used for gluing and repairing resinous textile materials.

The aim of the invention is to reduce toxicity, increase the viability and adhesive strength of adhesive compositions,

This goal is achieved by the adhesive composition for bonding and repair of rubber-textile materials, including chloroprene rubber, burnt magnesia, zinc white, sulfur, pine rosin, nephras and ethyl acetate, and containing an additional 70% solution of ethyl acetate, modified trimethylolpropane, penta or penta in ethyl acetate with a mass ratio of 1: 0.5 with a hydroxyl number of 288- 556.0 mg KOH / r, a melting point of 56-120 ° C in the following ratio of components, wt.%:

Chloroprene rubber 6.80-7.22 Magnesia burn 0.48-0.51 Zinc white 0.34-0.36 Sulfur 0.06-90.07 Pine rosin 0, 36 70% solution of modified polyethylene terephthalate in ethyl acetate . . 6.25-11.76. Nefras 26.74-28.41 Ethyl acetate 53.48-56.82 Polyethylene terephthalate modified with trimethylolpropane, pentaerythritol or glycerol is obtained by the reaction of alcoholism of polyethylene terephthalate (PET)

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trimethylolpropane (TMP), pentaerythritol (PE) or glycerol (hl) in the presence of a sodium carbonate catalyst (0.3 wt.%) at a mass ratio of PET: Polyhydric alcohol of 1: 0.5. The process is conducted in a stream of inert gas with stirring at a temperature of (240 ± 5) ° C for 2-12 hours. Alcoholization of polyethylene terephthalate with polyhydric alcohol results in modification products of different molecular weights, characterized by different melting points, which depends on the time of alcoholysis.

In the table. 1 shows the characteristics of the products used.

The invention is carried out by preparing an adhesive composition, the method comprising: a rubber mixture of the composition, mae:

Chloroprene rubber 100.0 Magnesia 7.00 White zinc 5.00 Sulfur 1.00 Pine rosin 5.00 is dissolved in a mixture of organic solvents (nefras: ethyl acetate 2: 1) in a ratio of 1:10 and 70% is added to the resulting solution a solution of the product of modification of polyethylene terephthalate in ethyl acetate in a ratio of 1: 7.5; 1:10: 1:15.

The compositions of the obtained compositions with the addition of resins are given in table. 2.

In the table. 3 shows the bonding strength when using adhesives with the introduction of products of modification of polyethylene terephthalts, according to the numbering of the table. 1. Tests for bond strength during delamination were carried out according to TU 38 105747-85. The use of adhesive compositions can increase the strength properties

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5

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5

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If adhesive structures are 1.1-1.5 times, refuse to use highly hazardous and expensive components as adhesive additives and increase the viability of the compositions from 1-5 hours to more than 30 days.

It should be noted that the modified polyethylene terephthalate can be obtained on the basis of polyethylene terephthalate waste, which significantly affects its cost and solves the problem of waste utilization.

Claims (1)

SUMMARY OF THE INVENTION A glue composition for bonding and repairing rubber-textile materials, including chloroprene rubber, burnt magnesia, zinc whitewash, sulfur, pine rosin, nephras and ethyl acetate, so that, in order to reduce toxicity, increase the viability and strength of bonding , it additionally contains a 70% solution in ethyl acetate of polyethylene terephthalate modified with trimethylolpropane, pentaerythritol or glycerol, with a mass ratio of 1: 0.5, with a hydroxyl number of 288-556.0 mgKOH / g, tempera melting point 56 120 ° C in the following ratio of components, wt.%: Chloroprene rubber 6.80-7.22 Magnesia burn 0.48-0.51 Zinc white 0.34-0.36 Sulfur 0.06-0.07 Pine rosin 0.34-0.36 70% modified solution polyethylene terephthalate in ethyl acetate 6.25-11.76 Nefras 26.74-28.41 Ethyl acetate 53.48-56.82 Table 1 Characterization of used-modified polyethylene terephthalates Adhesive Compositions Characterization of adhesive compositions Continuation of the table. 1 table 2 Table 3