Polymer composition and a pneumatic tire

PROBLEM TO BE SOLVED: To provide a polymer composition capable of simultaneously improving durability, adhesion to an adjacent rubber and processability while maintaining air permeation resistance. SOLUTION: The polymer composition contains 1-30 pts.mass of one or more selected from the group consisting of a 5C petroleum based resin, a 9C petroleum-based resin and a terpene resin, relative to 100 pts.mass of the polymer mixture containing 99-60 mass% of a styrene-isobutyrene-styrene triblock copolymer and 1-40 mass% of a polyamide-based polymer containing a polyamide in a molecule chain and having a Shore D hardness of 70 or less. COPYRIGHT: (C)2010,JPO&INPIT