Patent ID: 6417291
Filing Date: 2002-07-09
Classification: C08G

Abstract:
A process for producing a polyarylate through the polycondensation of an aromatic dihydroxy compound and an aromatic ester bond forming precursor, characterized in that terminal modification reaction is carried out by using a salicylic acid ester compound expressed by the following formula (1) as a terminal modifying agent, [wherein Ra is ethyl or methyl; Rb is a C1 to 30 alkyl group (hereinafter, Cx to y means x to y of carbon number), C1 to 30 alkoxy group, a C6 to 30 aryl group or a C6 to 30 aryloxy group; Rb is optionally substituted with methoxycarbonyl, ethoxycarbonyl, 2-(methoxycarbonyl)phenyloxycarbonyl, 2-(methoxycarbonyl)phenyloxycarbonyloxy, 2-(ethoxycarbonyl)phenyloxycarbonyl, 2-(ethoxycarbonyl)phenyloxycarbonyloxy, a C1 to 30 alkyl group, a C6 to 30 aryl group or a C6 to 30 aralkyl group].