FUNCTIONALISED DIENE CAOUTCHOUCS WITH HIGH CONTENT OF VINYL GROUPS Russian patent published in 2013 - IPC C08L19/00 C08L13/00 C08K3/00 

FIELD: chemistry.

SUBSTANCE: invention relates to rubber mixtures for production of highly filled cast products, preferably tyres. Rubber mixture contains, at least, one caoutchouc and from 10 to 500 wt.fr. filler in terms of 100 wt.fr. of caoutchouc. Caoutchouc is obtained by polymerisation of one or some dienes in solution with the following introduction of functional groups, such as carboxyl or hydroxyl groups or their salts, in presence of radical initiators, and contains from 0.02 to 3 wt % of connected carboxyl or hydroxyl groups, or their salts. Content of bound in 1,2-position dienes, that is vinyl groups, constitutes from >70 to 95 wt % calculated per applied solution caoutchuoc. Also described is method of obtaining rubber mixture. Rubber mixture can be applied for production of tyres and other cast products.

EFFECT: high rebound resilience at 70°C, low value of dynamic loss angle tangent value at temperature 60 and 80°C and low value of tan5 maximum in the range of amplitudes of vulcanisers from such rubber mixtures.

8 cl, 2 tbl, 5 ex