THERMOPLASTIC TRANSPARENT RESIN

摘要

A thermoplastic transparent resin is produced by hydrogenating terminal double bonds and 70% or more of aromatic double bonds of a copolymer which is produced by polymerizing a monomer composition essentially consisting of at least one (meth)acrylic ester monomer and styrene and has a molar ratio (A/B) of from 1 to 4 wherein A is the molar amount of a constitutional unit derived from the (meth)acrylic ester monomer and B is the molar amount of a constitutional unit derived from styrene. The (meth)acrylic ester monomer is acryl methacrylate or a combination of alkyl methacrylate and alkyl acrylate. The thermoplastic transparent resin is suitable for the production of a molded article such as optical article having a good color tone because molding defects occur rarely.