SU763396A1 - Rubber mixture - Google Patents

Description

rilic acids (BEF-JI), for example methyl acrylate, methyl methacrylate, isopropylcarboxymethyl methacrylate, fb-cyanoethyl methacrylate.

In tab. 1 given the compositions of the proposed mixture and known. Composition 1 in the table. 1 does not contain sulfur-containing agents (salt vulcanization), composition 2 in table. 1 contains sulfur and sanktokyur, composition 3 is the prototype.

Tab. 2 contains the physico-mechanical characteristics of rubber obtained by vulcanization of rubber compounds, the compositions of which are given in table. 1. As follows from the table. 2, the strength characteristics of rubbers obtained by vulcanization of mixtures containing an experimental accelerator are much higher than those of the prototype.

To determine the optimal amount of the experimental accelerator that needs to be introduced into the rubber mixture, sample formulations containing 2, 5, 6, and 8 parts by weight are prepared. L3-312a. The rest of the substances are administered in the same amounts as in composition 1 (see Table 1).

Table 3 gives data on the physicomechanical properties of these rubbers. From tab. 3 it follows that the optimal amount of accelerator is 5 wt.%.

The rubbers obtained with this amount of accelerator have the greatest strength and the greatest relative elongation.

The use of the proposed accelerator allows obtaining rubber based on ester rubbers with enhanced strength characteristics, while retaining the advantages of a prototype rubber, which consists in reducing the vulcanization time.

Rubber, prepared from these mixtures, have physical and mechanical characteristics, presented in

tab. 2 (vulcanization time for all formulations 60 min).

As can be seen from the data table. 2 and 3, the physicomechanical properties of rubbers from the proposed mixture are significantly higher than those from a known mixture.

one

The composition of the mixtures

Table

Copolymer BEF-UI 100

100

100 2

Stearinova

2

2 10 acid

Hydroxide

10 5

10 calcium

5 MFK-6 (prototype accelerator

L3-312a (proposed

Rubber properties

Characteristic

20 150 20 150 20 150

165

293,160 301,172,235

321 390 245 365 400 320

37

table 2

Composition

(prototype)

48 186

45 83

48

99

18 29

nineteen

15

20

Claims (1)

1. Copyright certificate for application number 2432071 / 23-05, cl. C 08 L 19/00, 12.22.76. so that, in order to improve the physicomechanical properties of rubber from this mixture, the latter contains as a vulcanization activator a compound of the formula