Patent ID: 8178611

Claim:
A polymer composition, comprising: a thermoplastic matrix polymer X; a block copolymer Y dispersed in the matrix polymer X; and an additive Z containing an organic compound which is liquid at a melting point of the matrix polymer X or a solution of the organic compound, wherein any two of the matrix polymer X, the block copolymer Y and the organic compound are phase-separated, the block copolymer Y includes a block Y 1 which is composed of polymerized monomers having a ring structure, and a block Y 2 which is composed of monomers different from the monomers of the block Y 1 , and the organic compound has an intramolecular ring structure or a ring structure formed in a molecule or between molecules due to intermolecular interaction, the organic compound being bleeding-out in the block copolymer Y dispersed in the matrix polymer X.