Process for the preparation of diene rubber vulcanisates

Details Process for the preparation of diene rubber vulcanisates Process for the preparation of diene rubber vulcanisates

C - Chemistry, Metallurgy

08

J

C08J 3/24 (2006.01) C08K 5/39 (2006.01)

Patent

CA 2077156

A process for the preparation of diene rubber vulcanis- ates is disclosed. The vulcanisation is carried out at temperatures from 140 to 200°C, in the presence of 1 to 4.5 parts per 100 parts of rubber of crosslinker substances of the formula Image wherein n is 2 or 6 and Bz is benzyl, in the presence of a very small quantity of sulphur and a small quantity of a mercapto accelerator, a sulphenamide accelerator or a mixture thereof. The process of the invention produces elastomers having an outstanding ageing stability and reversion stability after a relatively short vulcanisation time using economical amounts of crosslinker substances and avoiding blooming phenomena in the vulcanisate.

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