SU1209700A1 - Rubber mix - Google Patents

Description

one

FIELD OF THE INVENTION The invention relates to rubber rubber, in particular to rubber compounds.

The purpose of the invention is to increase the concentration of the rubber compound while maintaining the strength properties of rubber from it.

PRI me R 1. In a rubber mixture of the following composition, wt.h .: isopropane rubber 100.0; vulcanizing agent - sulfur 1,5; vulcanization activator - tetramethylthiuram disulfide 0.3; K-cyclohexyl-1-2-benzthiazolyl-sulfenamide 1.0; zinc oxide 5.0; stearin 1.0; the filler is carbon black with a particle diameter of 66-100 nm (PM-40N} 30.0, plasticizer is introduced — an oxidized rosin resin for the proposed mixture and gum rosin - FOR a known mixture in an amount of 2.5; 10; 20 ma.ch

The properties of rubber compounds and vulcanizates are listed in Table 1.

Example2. In the rubber mixture of the following composition, parts by weight: poly-chloroprene rubber 100.0; vulcanizing agent - zinc oxide 5.0

Mooney viscosity at

Resistance to scorching, min Adhesion by Tel-Tak kg / cm

Strength at stretching, MPa

Relative elongation,% Residual elongation,%

26

thirty

25 22

30 30

20

27 26

30 30 30

22 20

30 30

2.37 2.49 2.63 2.78 2.00 2.12 2.24 2.32

26.0 25.8 20

, 16.8 24.2 22.0 17.4 13.8

750

22

760 790 810 740 750

24 26

28

20 22

770 790

24 26

96

98 100 116 94 96

09700.

and magnesium oxide 7.0; vulcanization activator - stearic acid 1.0; the filler is technical carbon with a specific geometrical surface of 12–18 m / g 40.0, a plasticizer is injected — an oxidized rosin resin for the proposed mixture and gum rosin for the known mixture in the amount of parts

0 Properties of raw rubber compounds and vulcanizates are given in table 2.

Example In the rubber mixture of the following composition, wt.h .: butadiene. methylstyrene rubber containing

15 30% of the links methylstyrene and filled with 15 wt.h. oils (SKMSZO ARKM-15) 100.0; vulcanizing agent is sulfur 2.0; vulcanization activator - di- (2-benzthiazolyl) -disulfide 1,5; di20 phenylguanidine 0.5; zinc oxide 3.0; stearic acid 2.0; the filler is kaolin 20-1.0,0, the oxidized rosin is introduced into the proposed mixture, and the gum is introduced into the known mixture. Properties

25 raw rubber mixtures and vulcanizates are given in table 3. The dosage of the plasticizer 5 wt.h.

Table 1

20

27 26

22 20

30 30 30

30 30

, 16.8 24.2 22.0 17.4 13.8

770 790

28

20 22

24 26

98 108

68 12 4,0

5.0 12.6

610

60 14

4.6

5.07 12.2

630 12

table 2

72

ten

3.4

4.4

12.0

600

70

66

3.6 3.9

4.4 4.6

11.4 10,

620 680

12

sixteen

Table3

Claims (2)

RUBBER MIXTURE based on carbochain rubber, including a vulcanizing agent, vulcanization activators - zinc oxide, stearic acid, Filler - carbon black, kaolin and plasticizer, characterized in that, in order to increase the adhesion tack of the rubber mixture while maintaining the strength properties of the rubber from it, the mixture contains as a plasticizer an oxidized rosin resin with mol.m. 600-700, a softening temperature of 65 ~ 70 ° C and an acid number of 90-120'mg KOH / g in the following ratio of components, wt.h .: Carbocarbon rubber Vulcanizing agent Vulcanization Activators - Zinc Oxide, Stearic Acid Filler Carbon Black, Kaolin Indicated Oxidized Rosin Resin 100 . 1,5-12,0 1.0-7.3 20.0-100.0 2-20 SU „„ 1209700>