Patent ID: 9695304
Date: 2017-07-04
CPC Classifications: B60C,C08L

Claim:
1. A rubber composition for tire bead insulation comprising a diene rubber, a nitrone compound having a carboxy group, a carbon black and a white filler; the diene rubber containing a natural rubber and a styrene-butadiene rubber, wherein a mass ratio of a content of the natural rubber and a content of the butadiene rubber is from 50:50 to 90:10; a content of the nitrone compound being from 0.1 to 10 parts by mass per 100 parts by mass of a total content of the diene rubber and the nitrone compound; a content of the carbon black being not less than 70 parts by mass per 100 parts by mass of a total content of the diene rubber and the nitrone compound; a content of the white filler being not less than 20 parts by mass per 100 parts by mass of a total content of the diene rubber and the nitrone compound; and a total content of the carbon black and the white filler being from 90 to 180 parts by mass per 100 parts by mass of a total content of the diene rubber and the nitrone compound.