| abstract |
The present invention provides a processing aid fornthermoplastic resin having a weight average molecular weight of 10,000nto 300,000, which is obtained by polymerizing an alkyl (meth)acrylate, ornan alkyl (meth)acrylate and another vinyl monomer copolymerizablentherewith, in the presence of a mercaptan having an alkyl ester groupnwith C 4-20 alkyl group as a chain transfer agent, and/or an organicnperoxide having a tertiary-butyl peroxy group as a polymerizationninitiator. |