SU804667A1 - Chloroprene rubber-based vulcanized rubber mixture - Google Patents

Description

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This invention relates to the rubber industry, in the private sector, and to the development of a vulcanizable rubber compound based on chloroprene rubber.

Known vulcanizable rubber mixture based on chloroprene acid, including a plasticizer, such as dibutyl phthalate in an amount of 15 parts by weight. per 100 weight parts rubber l.

The rubbers from this mixture have insufficient physical and mechanical and operational properties.

The purpose of the invention is to improve the physicomechanical and operational properties of rubber from a known rubber compound.

The goal is achieved by the fact that a rubber mixture based on chloroprene rubber, including a plasticizer, is vulcanizable, as the latter contains 1,2-cyclohexanediucetic acid hexyldealkyl ester, (fflSUrflyk) of the formula

oo

oh-ehg ekg-eo-cigHij

p11i

about h about

in the amount of .15-20 weight.h.

per 100 weight.h rubber. .

Example 1. A rubber mixture based on chlorinated rubber is prepared and vulcanized for 25 minutes.

The composition and properties of the mixture are presented in table. 1 and 2.

As can be seen from the table. 2, the introduction of GDAECGK in an amount of 20 weight.h. uve- It gives a tensile strength of 5 kg / cm, a relative increase of 40%.

0 elongation while maintaining the same level of residual elongation and reduces swelling in oil MK by 1%, in gasoline galosh by 0.8%.

5 Example 2. Preparing rubber

a mixture of the following composition, parts by weight: chloroprene rubber 100, the plasticizer is hexyl.7 all-potassium 1,2-cyclohexanediucetic acid 17, and

0 and the rest of the ingredients listed in the table. 1. The vulcanization time - 2 5 mn.

The physicomechanical indicators of rubber of the specified mixture are given in

5 tab. 2 ..

As can be seen from the table. 2, the introduction of GDAECGK in an amount of 17 parts by weight. increases the tensile strength by 14 kg / cm elongation by 26%, with

0 decreasing residual elongation by

4% reduces the swelling in oil MK 0.9% and petrol galosh 0.7%.

Example 3. A rubber compound was prepared, parts by weight, chloroprene rubber 100, 1,2-cyclohexanedioacetic acid hexyldekali ether 15 and the rest of the ingredients listed in table. 1. Cure time 25 min.

Physical and mechanical properties of this mixture are given in table. 2

As can be seen from the table. 2, the introduction of GDAECGK in the amount of 15 weight.h. increases 2 tensile strength by 20 kg / cm, relative elongation by 15%, reduces residual elongation by%, reduces swelling in the bulk of M

by 0.8%, and in gasoline galosh by 0.6%.

The results of the physicomechanical tests of the obtained vulcanizates show that the introduction of 1,2-cyclohexanedioxyacetic acid as a plasticizer-hexyldealkyl ester increases the strength of rubber as compared with samples from a known mixture, increases the relative elongation and reduces the residual elongation, reduces the swelling in oil MK and gasoline galosh. The use of zepfir as a plasticizer allows to reduce the content of plasticizer in the mixture being vulcanized and to increase the amount of fillers, which leads to cheaper products.

110

151D 25

DBF 115 151x 25 GDECGDUK 124 151 25 GDECGDUK 130 151f 25 GDETSGDUK

T a

faces

3.0 n / b 2.5 n / b

2.01.7

2.11,8

2.21,9

Claims (1)

1. Handbook of rubber. M., ChiIQ, 1971, p. 453 (prototype).