THERMOPLASTIC ELASTOMER COMPOSITION AND PNEUMATIC TIRE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a thermoplastic elastomer composition which comprises a continuous thermoplastic resin phase and a rubber finely dispersed therein in a high content. SOLUTION: This thermoplastic elastomer composition comprises a continuous phase consisting of a thermoplastic resin (A) alone or together with another thermoplastic resin (B) having the same composition and structure and a lower viscosity and a disperse phase consisting of a rubber (C) or a composition (D) containing a rubber. The viscosity and compounding ratio of the elastomer composition satisfy the following expressions: 0.8<ηd1/ηm1<1.2 (1), 1.2<=ηd/ηm<=1.9 (2), 0<=ϕm2/(ϕm1+ϕm2)<=0.3 (3), and ϕd/ϕm×ηm/ηd<1 (4).