MODIFIED STYRENE-FUMARIC ACID COPOLYMER, LOW SHRINKAGE MATERIAL USING IT, METHOD OF RECOVERY/REUSE OF THERMOPLASTIC RESIN AND MANUFACTURING PROCESS OF MODIFIED STYRENE-FUMARIC ACID COPOLYMER

摘要

PPROBLEM TO BE SOLVED: To provide a modified styrene-fumaric acid copolymer reusable for a low shrinkage material of a thermoplastic resin. PSOLUTION: The modified styrene-fumaric acid copolymer is prepared by subjecting the fumaric acid structure portion of a styrene-fumaric acid copolymer to a condensation reaction. The condensation reaction is conducted by the reaction with acetic anhydride or by the thermal dehydration reaction. The styrene-fumaric acid copolymer is prepared by decomposing a thermosetting resin containing a polyester and its crosslinked portion with supercritical water. Preferably, the decomposition is conducted in the presence of an alkali. PCOPYRIGHT: (C)2008,JPO&INPIT