RUBBER MIXTURE FOR NON-STUDDED TIRE AND NON-STUDDED TIRE PRODUCED USING THIS MIXTURE Russian patent published in 2012 - IPC C08L21/00 C08L81/04 B60C1/00 

FIELD: polymer chemistry.

SUBSTANCE: invention refers to rubber mixture for non-studded tire. Rubber mixture includes, possibly, no less than 0.5 weight parts of sulfur and from 1 to 30 weight parts of organic vulcanizing agent. Vulcanizing agent is represented by the formula: -(R-Sx)n-, where R is (CH2-CH2-O)m-CH2-CH2, x is integral number from 3 to 6, n is integral number from 10 to 400 and m is integral number from 2 to 5. The amount of components is given per 100% w/w of rubber component, containing 20 to 80 % w/w of natural rubber and 80 to 20% w/w of polybutadiene rubber. Glass transition temperature Tc with maximal tan δ of vulcanized rubber mixture is no more than -50°C, and hardness of vulcanized rubber mixture at 0° is no more than 64. Use of rubber mixture provides for slowed down hardness increase of non-studded tire with time and maintenance of favorable characteristics on snow and ice road for long time.

EFFECT: increased tire durability. Better performance of the tire on ice and snow.

1 dwg, 1 tbl, 4 ex