Polymer composition for inner liner and pneumatic tire using the same

摘要

An object of the present invention is to provide a polymer composition for an inner liner, that is excellent in air permeation resistance and adhesion with an adjacent rubber, and a pneumatic tire using the same. In the polymer composition for an inner liner, a polymer component contains 99 to 50% by mass of a styrene-isobutylene-styrene triblock copolymer, and at least one of a styrene-isoprene-styrene triblock copolymer and a styrene-isobutylene diblock copolymer in a total amount of 1 to 50% by mass.

主权项

1. A polymer composition for an inner liner comprising
a styrene-isobutylene-styrene triblock copolymer in an amount of 90 to 50% by mass of a total polymer content, a styrene-isobutylene diblock copolymer, which is linear, contains 10 to 35% by mass of a styrene unit, and has a weight average molecular weight of 40,000 to 120,000, in an amount of 9 to 20% by mass of a total polymer component, and an ethylene-vinyl alcohol copolymer in an amount of 1 to 30% by mass of a total polymer component.