SU939479A1 - Butadiene-nitrile rubber based rubber stock - Google Patents

Description

(S) RUBBER MIXTURE BASED ON BUTADIEN NITRIL

The invention relates to the manufacture of rubber products.

Known rubber compound based on butadiene-nitrile rubber, containing N- (1-hydroxy-2,2,2-trichloroethyl) methacrylamide or N- (1-hydroxy-2,2,2-trichloroethyl) -acrylamide as a vulcanizing agent. .

However, said rubber mixture is vulcanized for a long time.

Closest to the present invention is a rubber mixture based on butadiene-nitrile rubber, which includes a vulcanizing agent — N- (1-hydroxy-2, 2, 2-t-trichloroethyl-) acrylamide together with a vulcanization accelerator — trichlorothiphenol, taken in 8 dosages. 0,, 0 and 0, respectively, mash for 100 mash of rubber 2, respectively.

The time to reach an optimum for a known mixture is relatively long.

RUBBER

The purpose of the invention is to increase the speed of vulcanization.

To achieve this goal, a rubber compound based on butadiene nitrile rubber comprising a vulcanizing agent - M- (1-hydroxy-2, 2,2-trichloroethyl) -methacrylamide or N- (1-hydroxy-2,2,2, -trichloroethyl) acrylamide and a vulcanization accelerator,, as an accelerator, contains 3f310-dichloro-, dimercaptodiphenylsulfone in the following ratio of components, wt.h .:

Nitrile butadiene

rubber100

15

Vulcanizing

0.3-7

Agent f 3,3-Dichloro-, | -dimercaptodife2-3 nilsulfone

20

Example 1. In the rubber mixture composition, wt. m .: SKN-26M 100.0; stearin 1.5; zinc oxide 5.0; tekh3EZE 7E4

CG DG-100 “S.O; The N- (1- and proposed mixtures (3 and), prio-hydroxy-2, 2,2-trichloroethyl) -methacrylated in the table. 1 show that amide 5.0 is injected Z.ZDichloro. "- dimer- when 3,3-dichloro-4 is introduced, -dimercapcaptodiphenylsulfone in the amount of diphenylsulfone, the structure rate of 0 wt.h.d./5 increases sharply.

Example 2.8 rubber compound

of Example 1, Z.ZDichloro- is administered. Changing the dosages of vulcanizing-dimercaptodiphenylsulfone in a quantizing agent within the limits known from 3.0 parts by weight of the prototype does not significantly affect

The test results obtained to the cure rate and properties of eucanizates from known (1 and 2) vulcanizates.

Table 1

In tab. 2 shows the properties obtained in the optimum of vulcanizates from

Contents, ma.ch:

M-Oxy-2,2,2-trichloroethyl methacrylamide

Chlorine-containing thiophenol

t (3.3 Dichloro-, 4-dimercaptodiphenylsulfone

known and proposed rubber compounds.

Table 2

5.0

5.0

5.0 2.0

2.0

3.0

I

Ozine compound volcanic acid

I -. “- ---- -.

Time to achieve optimal properties at kS (K, min

Strength at stretching, MPa

Relative elongation,% Residual elongation,%

The coefficient of thermal aging in tensile strength (373 K,

Continuation of table 2

1 1 2 P 3

"40

20

23,

23.5 13 8

Claims (2)

Claim A rubber mixture based on nitrile butadiene rubber, comprising a vulcanizing agent N- (1-okch2,2, 2-trichloroethyl) methacrylamide or N- (1-hydroxy-2,2,2-trichloroethyl) -acrylamide and a vulcanization accelerator, characterized in , that, with, the goal of increasing the speed of vulcanization, as an accelerator 35 it contains 3.3 ~ dichloro-4,4'-dimercaptodiphenylsulfone in the following 4 $ ratio of components, m.h.: Nitrile butadiene rubber Vulcanizing agent _f 3,3-Dichloro-4,4-dimercaptodiphenylsulfone 100 0.3-7 2-3