SU1235879A1 - Method of vulcanizing liquid carboxylate rubbers - Google Patents

Description

The invention relates to the process of structuring elastomers in the manufacture of rubber products, in particular vulcanizing rubber and carboxylate rubbers, and can be used in the production of filled rubber products that use carboxylate rubbers.

The aim of the invention is to increase the rate of vulcanization of liquid carboxylate rubbers and the hardness of the obtained vulcanizates.

The method is carried out by the following processing;};} structuring the liquid with carboxylate.

Vulcanisation is introduced into carboxylate rubber by a di- or polyvinyl ether – divinyl ether diethidewedog.

DVEDEG

6.11

DVEDEG

ten

DVEDEG

6.11

5879

to

lenglikol DVEDEG (or pentaerythritol tetravinyl ether) TVEPE. Mix the mixture thoroughly and mix into a mold. The vulcanization process is carried out in a drying oven at a given temperature. The vulcanized sample is then removed from the mold and subjected to physico-mechanical tests (the maximum degree of swelling and Shore A hardness are determined). The beginning of the process of structuring the system is investigated by means of a reoviscosimeter.

Examples of the method

SKD-1 rubber with a carboxyl group content of 3.7 wt.% and structuring kinetics according to a known method are given in Table 1.

Table

0

0

five

10 20 30

five

10 20 30 40

14.3

12.0

10.0

8,8

10.0

7.2

6.5

6.0

5.8

About About 7

10 O 15 27 34 36

five

10 20 30

5 10

11.5 7.4 6.2 5.8 9.8 6.9

O 12 30 35

3 20

In tab. 2 shows examples of the method of vulcanization of rubbers with terminal functional groups of the SKD-KTR grades (content

Polybutadiene SKD-KTR

DVEDEG

Continuation of table 1

carboxyl groups of 2.5 wt.%) and SKN-10KTR (carboxyl groups content of 3.0 wt.%).

Table

1.5 2.5 6.0

1.6

11.4 19, - / 90.0

Temperature range of 30-90 C is selected, based on the fact that at temperatures above 90 C can be observed

Editor N.Egorova

Compiled by A.Gorshkov

Tehred M.HBdan "M.Samborska Proofreader

Order 3059/22 Circulation 470Subscription

VNIIPI, State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

Continued table. 2

give oxidation, at temperatures less than 30 ° C, the process becomes time consuming.

Claims (1)

METHOD OF VOLCANIZATION OF LIQUID CARBOXYLATE RUBBERS by their interaction with a vulcanizing agent, characterized in that, in order to increase the vulcanization rate and hardness of the vulcanizates, diethylene glycol divinyl ether or pentaerythritol tetravinyl ester is used in an amount of 3-10. 100 parts by weight rubber and vulcanization is carried out at 30-90 ° C. 5879 ¹ 1235879