Heat-resistant unsaturated polyester

摘要

A heat-resistant unsaturated polyester having a structure represented by the formula (I) -X-Y)m (X-Z)n(I) wherein X represents a structure (A): <IMAGE> wherein R represents hydrogen or an alkyl group having 1 or 2 carbon atoms; Y represents a structure (B): -OC-CH=CH-CO- Z represents a structure: <IMAGE> and m and n independently represent a repeating numbers; a mole ratio of Y/Z is 10/90 to 99/1; and the polyester has an inherent viscosity ( eta inh) of at least 0.4 dl/g as determined at a temperature of 30 DEG C. in a solution of 0.5 g of the polyester in 100 ml of dimethylformamide.