SU1031981A1 - Rubber stock - Google Patents

Abstract

RUBBER MIXTURE based on unsaturated carbon chain rubber, including vulcanizing agent. - polysulphide of carbazole, from which it is, in order to increase the durability of the vulcanizate, it additionally contains a bis-dithiol of the general formula .- xV vV Kir where R is phenyl and R is methyl or phenyl when followed. the ratio of components, May. w .: Yeyas ltsenmy carbon-carbide rubber 100 Carbaeola polysulfide2-5 Bis-dithiol 0.5-2

Description

SAE SO

The invention relates to the rubber industry, to vulcanizable mixtures based on unsaturated carbon chain rubber. Carbon chain rubber has found wide use for the manufacture of various rubber products. To modify the properties of vulcanizates obtained from rubber mixtures, the combination of rubbers with various thermoplastic polymers is widely used; these include various polyamides f13. However, the temperature resistance and resistance of the vulcanizates are not sufficient. Closest to the present invention is a rubber mixture based on an unsaturated carbon chain rubber, including carbazole polysulfide C pitch), which is a vulcanizing agent 2. The disadvantage of the prototype is relatively low wear resistance (high abrasion). The purpose of the invention is to increase the wear resistance of the vulcanizate. The goal is achieved by the fact that the rubber mixture based on unsaturated carbon chain rubber, including the vulcankuzkadiy agent agent - carbazole polysulfide additionally contains bis-dithiol of the general formula °, xK.xCL-s –c ir o where R is phenyl, R is methyl or phenyl: the following ratio of components TOTS., MA. : Unsaturated carbon chain rubber 100 Carbazole polysulfide2-5 Bis-dithiol 0.5-2 A positive effect is achieved only when bis-dithiol is used together with PSK. If you replace the pitch with an ordinary sulfur vulcanization agent, there is no effect. Example. The rubber mixture composition, mac.ch .: nitrile-butadiene rubber (SKN-18,100; 1.5 stearic acid, zinc oxide 5, carbon black DG-100 45) vulcanizing additives vulcanize in a press. Additives were 1.5 mach. mercaptobenzthiazole, 2.0 wt.h. mercaptobenzthiazole and 2.0 Ma.ch. sulfur (Table 1). Vulcanization is carried out with, for 40 minutes. The data in Table 1 show that the vulcanizates from the proposed eoetava are much better than prototypes for resistance to itiranium, better than controls for resistance to thermal aging, fatigue resistance of the network and resistance to itiraniyu EXAMPLE 2 Rubber ameee eeetava, mac.ch .: natural rubber 100J etearic acid 0.5 zinc oceanide 5, Ov carbon black DG-SOO 3.0, diphenylguanidine 3.0, dibenzthiazolyldiulfide 0.6v vulcanizing agents (dosages in Table 2) are vulcanized in molding at 143С for 15 min. The data in Table. Table 2 confirms the results. 1. Increasing eoprotivleni ietiraniyu vulcanizates result in increase of operating life products, feed-saving and labor.

table 2

36.0

Strength, MPa

Relative elongation,%

20

55

Elasticity ot50 skok,%

Heat aging resistance coefficient, 100 ° С x 48 h

34.0

35.0

500

540

20 61

20

60

50

50

Claims (1)

RUBBER MIX based on unsaturated carbon chain rubber, including a vulcanizing agent. - carbazole polysulfide, including the fact that, in order to increase the wear resistance of the vulcanizate, '- ·, it additionally contains bis-dithiol of the general formula where R is phenyl and R'-methyl or phenyl in the following ratio components, parts by weight: Unsaturated Carbide Rubber 100 Carbazole polysulfide 2-5 Bis dithiol 0.5-2 SU „10319