| abstract |
A processing aid for thermoplastic resins which is a resin having a weight-average molecular weight of 10,000 to 300,000 and obtained by using a mercaptan having an alkyl ester group in which the alkyl group has 4 to 20 carbon atoms as a chain transfer agent and/or an organic peroxide having a tert-butylperoxy group as a polymerization initiator to polymerize an alkyl (meth)acrylate optionally with other vinyl monomer(s) copolymerizable therewith. |