SU421700A1 - RUBBER MIXTURE - Google Patents

Description

one

This invention relates to the vulcanization of rubbers based on butadiene nitrile rubber with oligoester acrylates.

A vulcanizable rubber compound based on butidienenitrile rubber, containing oligoether acrylates in combination with organic peroxides or other free radical donors as a vulcanizing system, is known.

However, such rubber compounds are not sufficiently resistant to premature vulcanization.

In the proposed rubber mixture for butadiene nitrile rubbers, salts of inorganic acids and divalent copper, for example CuS, CuSO4, in an amount of 3-7 wt. hours per 100 weight. rubber h.

You get rubber with increased resistance to podvulkapazatsii while maintaining the physico-mechanical and thermal properties of vulcanizates.

The rectification of the vulcanized s. Is given in Table. one.

Table 1

Note. ) Oligo-etriacrylate MGF-9-2, w-methacry. H.bistrieetplengle graft. ) Oligoether 7-20-octamethacryltripentaerythritol adipate

In tab. Figures 2–4 compare the values of vulcanizates of the indicated mixtures and rubbers, by vulcanized oligoester acrylates and organic peroxides.

table 2

Comparative indicators of mixture vulcanizates 1

and unfilled rubber, vulcanized with oligoether acrylate 7-20 and organic peroxide

Table 4

Comparative indicators of vulcanizates of mixture III and filled rubber, vulcanized with oligoether acrylate MGF-9 and organic peroxide

Table 3

Comparative properties of vulcanizates

mixtures II and filled rubber, vulcanized

oligoether acrylate 7-20 n organic peroxide

Initiator

Subject invention

Rubber mixture based on butadiene nitrile rubber, containing oligo ether acrylates, vulcanization activator and other targeted additives, characterized in that, to reduce the tendency of mixtures to vulcanization, salts of inorganic acids and bivalent copper in an amount of 3-7 wt. hours per 100 weight. rubber h.