申请人:Mitsubishi Gas Chemical Company, Inc.
公开号:EP2650317A1
公开(公告)日:2013-10-16
The present invention relates to a polyester resin including a diol constitutional unit and a dicarboxylic acid constitutional unit as main constitutional units, in which the diol constitutional unit contains from 70 to 95% by mol of a constitutional unit derived from ethylene glycol and from 5 to 30% by mol of a constitutional unit derived from tricyclodecane dimethanol or pentacyclopentadecane dimethanol, and the dicarboxylic acid constitutional unit contains 50% by mol or more of a constitutional unit derived from a naphthalenedicarboxylic acid, and an optical lens obtained by molding the polyester resin. According to the present invention, there are provided a polyester resin that has a high refractive index and a low Abbe number and can be molded into a good optical lens, and an optical lens obtained by molding the polyester resin.
本发明涉及一种聚酯树脂,包括作为主构型单元的二元醇构型单元和二羧酸构型单元,其中二元醇构型单元含有 70% 至 95% (以摩尔计)由乙二醇衍生的构型单元,以及 5% 至 30% (以摩尔计)由三环十二烷二甲醇或五环十五烷二甲醇衍生的构型单元、二羧酸构型单元含有 50%(摩尔)或更多来自萘二羧酸的构型单元,以及通过模压聚酯树脂获得的光学镜片。根据本发明,提供了一种具有高折射率和低阿贝数并可模塑成良好光学透镜的聚酯树脂,以及通过模塑该聚酯树脂获得的光学透镜。