Patent ID: 8658727

Claim:
An elastomer composite comprising: 100 parts by mass of a block copolymer mixture containing 10 to 90 parts by mass of a block copolymer A, and 90 to 10 parts by mass of a block copolymer P, with the total amount of said block copolymer A and said block copolymer P being 100 parts by mass; 100 to 300 parts by mass of a softener B, having a kinetic viscosity in the range of between 50 and 500 centistokes (cSt) at 40° C.; 1 to 50 parts by mass of a propylene polymer C, having a modulus in bending in the range of between 1000 and 3000 MPa; and 1 to 50 parts by mass of an aromatic polymer D; wherein said block copolymer A is a block copolymer which is a hydrogenated compound of a block copolymer Z 1 , having one polymer block Y 1 , being mainly composed of a conjugated diene monomer, and two polymer blocks X 1 , being mainly composed of an aromatic vinyl monomer, each one at each end of said polymer block Y 1 , said block copolymer A having a weight average molecular weight in the range of between 150,000 and 500,000, and containing 20 to 50% by mass of an aromatic vinyl monomer unit, and said block copolymer P is a block copolymer which is a hydrogenated compound of a block copolymer Z 2 , having one copolymer block Y 2 , being mainly composed of a conjugated diene monomer and an aromatic vinyl monomer, and two polymer blocks X 2 , being mainly composed of an aromatic vinyl monomer, each one at each end of said copolymer block Y 2 , said block copolymer P having a weight average molecular weight in the range of between 160,000 and 400,000, and containing 40 to 80% by mass of an aromatic vinyl monomer unit.