Polymer composition

1. 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.

2. The polymer composition of claim 1 , wherein the intramolecular ring structure or the ring structure formed in a molecule or between molecules due to intermolecular interaction is a ring of five to twelve members.

3. The polymer composition of claim 1 , wherein the block copolymer Y is of A-B type or B-A-B type.

4. The polymer composition of claim 1 , wherein the block Y 2 of the block copolymer Y is any one of an ethylene-propylene copolymer, an ethylene-butylene copolymer, and an ethylene-propylene-ethylene copolymer.

5. The polymer composition of claim 1 , wherein the block copolymer Y includes 10 w % or more of styrene as the monomers.

6. The polymer composition of claim 1 , wherein

the block Y 1 of the block copolymer Y is polystyrene and the block Y 2 of the block copolymer Y is polyolefin, and

the content of the block copolymer Y in the polymer composition is from 0.5 w % to 20 w %.

7. The polymer composition of claim 1 , wherein

the organic compound is an alkyl phosphate compound or halogenated alkyl phosphate compound for use as a flame retardant which has a melting point lower than 185° C., and

the block copolymer Y dispersed in the matrix polymer X has an average diameter of 2 μm or less.

8. The polymer composition of claim 7 , wherein the flame retardant is at least one of trimethyl phosphate, triethyl phosphate, triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, cresyl dixylenyl phosphate, tris(chloropropyl)phosphate, tris(dichloropropyl)phosphate, and tris(tribromoneopentyl)phosphate.

9. The polymer composition of claim 7 , wherein the polymer composition is in the form of fiber.

10. The polymer composition of claim 1 , wherein the organic compound is at least one of glycerin, polyalkylene oxide, polysiloxane, imidazole, and denatured compounds thereof, an alcohol compound, an aldehyde compound, a ketone compound, and denatured compounds thereof, and two-molecule clusters thereof.

11. A polymer molded product formed of the polymer composition of claim 10 by extrusion molding, blow molding, rotational molding, or injection molding.

12. A paint or ink containing the polymer composition of claim 1 .