GRAFT COPOLYMER, POLYMER MATERIAL COMPOSITION CONTAINING SAID COPOLYMER AND FOAMABLE POLYSTYRENE BEAD CONTAINING SAID COPOLYMER AND PREPARATION OF SAID BEAD

摘要

PURPOSE:To obtain a graft copolymer having excellent antistat effect and its durability, by copolymerizing a specified hydrophilic monomer and a hydrophobic polymeric monomer having a polymerizable double bond on its terminal. CONSTITUTION:At least one hydrophilic monomer (A) selected from monomers of formulas I, II and III (wherein R1 is H or CH3-; R2 and R3 are each H, CH3 or C2H5; n is 1-5) (e.g., dimethylaminopropyl methacrylamide, dimethylaminopropyl methacrylate, N,N-dimethyl methacrylamide etc.) and a hydrophobic polymeric monomer (B) having a polymerizable double bond on its terminal [e.g., alkyl (meth)acrylates, styrene, acrylonitrile, vinyl acetate, ethylene, propylene etc.] are copolymerized. A graft copolymer providing a polymer material compsn. having especially excellent antistat effect and its durability can be thereby obtd.