Polyaddition copolymer and process for producing the same

摘要

A novel polyaddition copolymer having repetition units represented by the following general formula: where R: a lower alkyl group, Ar: a bisphenol compound residue, and X: a CH2O group or a COO group, is obtained by copolymerization reaction of a bisoxetane compound represented by the following general formula: and a bisphenol compound.