COMPOSITION OF RUBBER MIXTURE AND PNEUMATIC TYRE MADE FROM SAID COMPOSITION Russian patent published in 2011 - IPC C08L7/00 C08L9/00 C08L9/06 B60C1/00 B60C5/14 

FIELD: chemistry.

SUBSTANCE: rubber mixture is obtained by mixing 1-60 pts.wt low-molecular polymer based on conjugated dienes (B), having weight-average molecular weight measured using gel-penetrating chromatography per molecular weight of polystyrene from more than 30000 to not more than 200000, and content of vinyl bonds on the section of the diene compound with conjugated double bonds of not less than 40% per 100 pts.wt rubber component (A) which is mixed with (B). The rubber component (A) contains natural rubber and/or polyisoprene rubber and, if needed, at least one rubber selected from a group consisting of rubber based on a copolymer of butadiene and styrene, polybutadiene rubber and isobutylene isoprene rubber. The low-molecular polymer based on conjugated dienes (B) is obtained via anionic polymerisation, and the overall content of styrene links in the low-molecular polymer based on conjugated dienes (B) is less than 5 wt %.

EFFECT: disclosed composition has excellent processability during production and heat ageing resistance, high storage modulus and loss tangent.

10 cl, 6 tbl, 8 ex