Polyester resin, polyester resin composition, and plate, film, and hollow molded container prepared therefrom

Patent name: polyester resin, polyester resin composition, and a plate, a film, and a hollow molded container made therefrom Patent applicant Mitsubishi Chemical Co., Ltd. Main applicant Address Tokyo, Japan inventor Tanaka Chihiko; Masaharu Masaru application (patent) No. 200380102489.3 Application Date 2003.10.28 Certification Date Approval Notice No. 1708531 Date of Publication Approval 2005.12.14 Specification CD-ROM D0550 Main Classification Code C08G63/199 Classification Code C08G63/199; C08L67/02 Classification Original Application No. 2002.10.31 JP 317854/ 2002 Abstracts The present invention provides a polyester resin that is particularly suitable for use in optical films and the like. It is an alicyclic polyester resin comprising a dicarboxylic acid unit and a diol unit, characterized in that: (1) the dicarboxylic acid unit is mainly composed of 1,4-cyclohexanedioic acid units; (2) diols The unit consists essentially of 1,4-cyclohexyldimethanol units; (3) the ratio of alkyl ester ends to all ends of the polyester is up to 5 mol %; and (4) the polyester resin is 2 mm thick The molded board has a light transmittance of at least 87%. Sovereignty item 1. A polyester resin, which is a cycloaliphatic polyester comprising a dicarboxylic acid unit and a diol unit, characterized in that (1) the dicarboxylic acid unit is mainly composed of 1,4-cyclohexyl The diacid unit composition; (2) the diol units are mainly composed of 1,4-cyclohexyldimethanol units; (3) the ratio of alkylester ends to all ends of the polyester is at most 5 mol%; and (4) ) The 2 mm thick profiled plate of the resin has a light transmittance of at least 87%. International Application 2003-10-28 PCT/JP2003/013784 International Publication 2004-05-13 WO2004/039860