FLAME-RETARDANT UNSATURATED POLYESTER RESIN

摘要

A flame-retardant unsaturated polyester which has a structure comprising an unsaturated polyester and added to part of the unsaturated groups a phosphorous compound represented by formula (I) (wherein R<1> and R<2> are the same or different and each is an aliphatic or aromatic group; and m and n are the same or different and each is an integer of 0 to 4) and which has a phosphorous content of 2 to 10 wt.% and an unsaturated bond equivalent of 200 to 1,000 g/mol. It can give a cured article which has high flame retardancy although halogen-free and is excellent in properties such as heat resistance, moisture resistance, mechanical properties, and chemical resistance. The flame-retardant unsaturated polyester has excellent productivity. It is hence useful especially as a material for laminates for use in the electrical and electronic fields.