Patent ID: 9447208
Filing Date: 2016-09-20
CPC Classification: B60C,C08C,C08F,C08K,Y02T

Claim Text:
1. A rubber composition for a tire comprising: a rubber component; and a hydrated silica having particles each provided with micropores with openings in the range of 1.2×10 wherein the rubber component contains a modified polymer reactive to the hydrated silica, and in measurement according to a mercury press-in method using a mercury porosimeter of the hydrated silica, provided that: M1 (nm) represents diameter of the opening exhibiting the maximum value of mercury charge rate when pressure is increased from 1 PSI to 32000 PSI; M2 (nm) represents diameter of the opening exhibiting the maximum value of mercury discharge rate when pressure is decreased from 32000 PSI to 1 PSI; IB represents ink bottle-shaped micropore index; CTAB (m weight loss on ignition (mass %) represents weight loss when the hydrated silica is heated at 750° C. for 3 hours; and weight loss on heating (mass %) represents weight loss when the hydrated silica is heated at 105° C. for 2 hours, IB and CTAB satisfy following formula (I) and formula (II) and weight loss on ignition and weight loss on heating satisfy formula (III),