SU763387A1 - Carbochain rubber-based rubber mixture - Google Patents

Description

This invention relates to rubber industry, in particular to the development of a rubber mixture based on chain-chain rubber. A rubber compound based on carbon chain rubber is known, including a vulcanization accelerator — a quinoline derivative, for example, a polymerized 2,2,4-trimethyl-1,2-dihydroquinoline (acetonanyl) III. However, rubber from this mixture has a lower heat resistance and insufficient dynamic endurance ... The purpose of the invention is to increase the heat resistance and dynamic endurance and rubbers from this mixture. The goal is achieved by the fact that a rubber mixture based on a carbon chain rubber, including a vulcanization accelerator - a quinoline derivative, as the latter contains 6, b -methylene bishydroquinoline of the general formula where R is H, methoxy, ethoxy; R | - H or methyl group .; in the amount of 0.6-3 wt.h. per 100 wt.h. rubber Example 1. Preparing a rubber mixture based on isoprene rubber). The composition of the mixture, the vulcanization conditions and the properties of rubbers are presented in table. 1. Investigated recipe: rubber 100, sulfur 1.0, altax 0.6, DFG 3, stearic acid 1.0, zinc oxide; | 5 antioxidant see tab., Soot DG-100-30. Example 2. The process is carried out analogously to example 1, using butadiene styrene rubber (SKMS-30 ARKM-15). The composition of the mixture and the properties of rubber are presented in table. 2. Recipe: rubber 100, sulfur 0.2, thiuram 3.0, stearin 0.75, zinc white 5.0, carbon black DG-YuO 40 antioxidant see table. Example 3. The process is carried out analogously to example 1, using natural rubber as a rubber. The composition of the mixture and the properties of rubbers are presented in table. 3. The study

Recipe: rubber 100, carbon black DG-100 50, altax 0.6, DFG 3.0, stearic acid 1.0, zinc oxide 5.0, antioxidant, see table, ser 3.5.

How can you see from the table. 1-3, the rubbers from the proposed mixture are characterized by a higher, in comparison with the known, heat resistance and dynamic strength.

Table 1

Optimum vulcanization pr 133, min 20 20 Durability, kgf / cm 310 280 Relative elongation,% Residual elongation 25 25. 25%,% Indicators after hundred The coefficient is old0, 6 0.55 0.71 nor by durability The same with respect, 72 0.7. 0.6 body lengthening Resistance to crack propagation, thous. Cycles

Indicators

Durability, kgf / cm 300

Relative extension , %

Residual elongation,%

Tear resistance, kgf / cm.

TM-2 hardness

Rebound elasticity,% Resistance to crack propagation, thous. Cycles 20 310 800 170

T a b l i. c a

Type of antioxidant at a dosage of 2% rubber

b, 6 - Meti.lenbis-1, 2-diridrokhinolin

300

38

45 20 20 20 330 330 280 790 800 810 242425 Yeni, 100 ° 3 days 0,80,80,7 0,8,8,80,5 210 200 150

Thermal aging coefficient, 100. 72 h

By strength

By relative milling

Strength,

kGS / cm at 20

at 100 °

The same after aging, .100 ° .72 h

Relative extension, %

at 20 at 100®

After aging 100 72 hours

Residual elongation,%

Tear resistance, kg / cm Elasticity

by rebound,%

20 °

at

at 100 ° Resistance

crack propagation, thousand cycles

 Note. Structural formula offers a continuation of the table, 2

0.6

0.71

0.53

0.42

Table3

330 250

160

700 700

550 30

150

55 65

160 married compounds / ///.//

Claims (1)

Claim rubber compound based on chain-chain rubber, including a vulcanization accelerator - a quinoline derivative, characterized in that. where R. is H, methoxy, ethoxy group; R, - H or methyl group, in the amount of 0.6-3 wt.h. per 100 wt.h. rubber Sources of information taken by the attention in the examination .. 4f f.l 763387 e in order to increase heat resistance and dynamic endurance of rubber from this mixture, the latter contains 6.6 methylene bishydroquinoline of the general formula as a vulcanization accelerator “, / 1. Omelchenko R. I, and others. Investigation of the effectiveness of new antioxidants of the dihydrochi of the nolin series - Rubber and rubber, 1974, № b, p. 24 - 25.