Patent ID: 9315656
Filing Date: 2016-04-19
CPC Classification: C08K,C08L

Claim Text:
1. A vibration isolating rubber composition consisting of a diene rubber, a carbon black and a silica as fillers, wherein the mixing ratio of the carbon black (a) and the silica (b) is (a)/(b) =80/20 to 20/80 (weight ratio), a silane coupling agent blended in the composition in an amount of 1 to 10 wt % based on the amount of the silica, and optional components, wherein the amount of the carbon black is from 10 to 16 parts by weight per 100 parts by weight of the diene rubber, wherein the carbon black has an iodine adsorption number in the range of 40 to 140 g/kg and a DBP oil absorption amount in the range of 90 to 160 ml/100 g and is selected from the group consisting of SRF, GPF, FEF, FT and MT, wherein the silica is a silica gel having a nitrogen adsorption specific surface area (BET method) in the range of 80 to 230 m wherein natural rubber (NR) is singly used as the diene rubber, or natural rubber (NR) and butadiene rubber (BR) are used together as the diene rubber within a blending ratio of NR/BR=70/30 to 100/0 (weight ratio), and wherein the optional components are selected from the group consisting of vulcanizing agents, oils, vulcanization accelerators and antioxidants.