SU861364A1 - Rubber mixture based on chloroprene rubber - Google Patents

Description

Magnesium oxide serves as an akdeptszrom hydrogen chloride, which was added during the process of vulcanization of chloroprene rubber, taken in the same amount as in the standard mixture. With the introduction of phosphonitrile in the amount of less than 8 wt.h. on 1OO wt.h. rubber, its effect as a scorch retarder is retained, but the vulcanization rate in the main period and the strength properties of rubber decrease. When increasing the amount of phosphonitrilaniland more than 11 wt.h. as part of the mixture, the sub-vulcanisadium induction period is reduced. The preparation of rubber compounds using phosphonitrilanilide and their subsequent vulcanization is carried out by the usual methods and on a standard basis.

The duration of scorch on

Muni at 13 ° C, min

The optimal duration of vulcanization at, min

Breaking strength, MPa

Relative extension, %

Residual elongation,%

TM-2 hardness

Rebound elasticity at

%

Heat aging coefficient (72 h,)

tensile strength at break

relative elongation

Resistance to growth and growth

multiple bending cracks

before destruction

The table shows that the resistance to scorching at the mixture of 1 with zinc oxide is 5 minutes, and the mixture of 2 with phosphonitrivlvlide - 20 minutes.

The values of the physicomechanical properties of volcanic rocks based on mixtures 1 and 2 according to the tensile strength, relative and residual elongation, hardness, elasticity and heat resistance are equal to cooctasKMbi among themselves.

Blend number

20

45

19.3 775 12 40

39

0.85 0.80

Does not collapse at 12OO

Claims (2)

The advantage of a reagent based on a mixture with phosphonitrilanilide is a significant increase in fatigue strength (almost 2 times) compared to rubber based on a standard mixture containing zinc oxide as a curing agent. Invention Formula The rubber mixture on the xnojumpeHrvvy rubber core, which includes hydroxide, used in rubber technology. The example below illustrates the potential for vulcanization of chloroprene rubbers, for example, Cr-50 rubber, phosphonitrilanilide. Example. Prepare two mixtures. The composition of the first mixture contains zinc oxide as a vulcanizing agent, and the composition of the second mixture instead of zinc oxide takes phosphonoyl chloride. Composition, parts by weight mixtures 1: rubber 1OO, magnesium oxide 7, zinc oxide 5 {mixtures 2: rubber 100 magnesium oxide 7, phosphonitrilanilind 100. Technological materials and physical-mechanical properties of vulcanizates based on them are presented in the table. 86 and a volatile atheng, differing from the fact that, in order to sustain the mixture to premature vulcanization and increase the hardness of rubbers from it, the mixture contains phosphonentripanipide as a vulcanizing agent with the following ratio of components, mac. 46 Chloroprene rubber 1OO Magnesium oxide 7-8 Phosphonone transducer 9h.11 Sources of information taken into account during the examination 1. British Patent No. 984278, cl. C 3 E, published, 1961. 2. Handbook of rubber. M., Himi, 1971, p. 85 (prototype).