申请人:Mitsubishi Gas Chemical Company, Inc.
公开号:EP2019121A1
公开(公告)日:2009-01-28
A polycarbonate resin which is reduced in the change of hygroscopic-expansion coefficient with changing environmental humidity, is inhibited from warping, and is suitable for use as an optical material is provided with excellent productivity. The polycarbonate resin is obtained by reacting an aromatic dihydric phenol compound (2,2-bis(4-hydroxyphenyl)propane, etc.), a compound forming a carbonic ester (phosgene, etc.), and a chain terminator represented by the following general formula (A) (dodecyl 4-hydroxybenzoate, etc.). (In the formula (A), n is an integer of 10 - 20.)
一种聚碳酸酯树脂可降低吸湿膨胀系数随环境湿度变化而发生的变化,抑制翘曲,并适合用作光学材料,生产效率极高。聚碳酸酯树脂是由芳香族二元苯酚化合物(2,2-双(4-羟基苯基)丙烷等)、形成碳酸酯的化合物(光气等)和由以下通式(A)代表的链终止剂(4-羟基苯甲酸十二烷基酯等)反应而得。式(A)中,n 为 10-20 的整数)。