RUBBER MIXTURE FOR TYRES WITH IMPROVED VULCANISING AGENT Russian patent published in 2014 - IPC B60C1/00 C08L7/00 C08L9/00 C08K3/04 C08K3/34 C08K5/36 

FIELD: chemistry.

SUBSTANCE: invention relates to rubber mixture for production of pneumatic tyres. Rubber mixture contains, at least, one vulcanising diene caoutchouc, 35-300 parts of, at least, one active filling agent, selected from soot, silicon dioxide, filling agents, based on silicon and metal oxides, from 0.1·10^-3 to 42·10^-3 moles per a hundred parts of vulcanising agent caoutchouc, which is cross-linked with functionality higher than 4, and from 0.1 to 20 parts of, at least, one vulcanisation accelerator. Vulcanising agent has sulphur-containing structure, including hydrocarbon and/or heterohydrocarbon, and/or siloxane group, with functionality higher than 4. Soot or silicon dioxide, or their combination constitutes, at least, 10 parts of active filling agents. Mixture also contains 0-250 parts of other additional additives. Said rubber mixture has glass-transition temperature Tg (E" max.) in accordance with DIN 53 513, at least -80°C and not higher than 0°C.

EFFECT: tyres, manufactured with application of said mixture possess Shore A hardness in accordance with DIN 53 505 and ASTM D2240 not less than 40 ShA and not higher than 95 ShA with specified temperature range from -80°C to +80°C and specified compression of about 10+0,2% at 10 Hz.

12 cl, 2 dwg, 6 tbl