Resin compositions with high vibration damping ability

摘要

A resin composition contains dicarboxylic acid constitutional units and diol constitutional units and at least one of an electroconductive material and filler which is dispersed in the polyester resin. The polyester resin satisfies the relationship, 0.5<=(A1 +B1)/(A0+B0)<=1, wherein A0 is the number of total dicarboxylic acid constitutional units, B0 is the number of total diol constitutional units, A1 is the number of dicarboxylic acid constitutional units having an odd number of carbon atoms in a polyester main chain, and B1 is the number of diol constitutional units having an odd number of carbon atoms in the polyester main chain. The resin composition exhibits a high vibration damping ability.