PROCESSABILITY IMPROVING AGENT FOR THERMOPLASTIC RESIN AND THERMOPLASTIC RESIN COMPOSITION CONTAINING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a processability improving agent for a thermoplastic agent which improves a long term persistence of lubrication such as releasability from a metal surface and a thermoplastic resin composition containing thereof. SOLUTION: A processability improving agent for a thermoplastic resin is a copolymer having a weight average molecular weight of 10,000 to 300,000 obtained by copolymerizing 10 to 99.9 wt.% of an alkyl acrylate having a 1 to 20C alkyl group, 0.1 to 10 wt.% of (meth)acrylate having not only an ester group but also an oxygen atom and 0 to 89.9 wt.% of a vinyl monomer copolymerizable with the above monomers by use of an organic peroxide having a tertiarybutylperoxy group as a polymerization initiator.