申请人:Idemitsu Petrochemical Co., Ltd.
公开号:EP1069146A1
公开(公告)日:2001-01-17
Disclosed are polycarbonates which are obtained by preparing a polycarbonate prepolymer through prepolymerization followed by polymerizing it through solid-phase, swollen solid-phase or thin film melt-phase transesterification, and have a remaining monomer content of smaller than 100 ppm, especially a dihydroxy compound content of smaller than 100 ppm, or have an acetone soluble content of at most 3.5 or at most 3.0 % by weight, or have a terminal hydroxyl fraction of smaller than 2 or smaller than 15 mol%; and optical materials and blow molding materials comprising the polycarbonate. The polycarbonates contain a reduced amount of impurities such as remaining monomers, oligomers and others and have improved physical properties including impact strength, and these are useful as optical materials and blow molding materials.
所公开的聚碳酸酯是通过预聚合制备聚碳酸酯预聚物,然后通过固相、膨胀固相或薄膜熔融相酯化聚合而得,其剩余单体含量小于 100 ppm,特别是二羟基化合物含量小于 100 ppm,或丙酮可溶物含量最多为 3.5 或最多 3.0%(按重量计),或末端羟基部分小于 2 或小于 15 摩尔%;以及包含这种聚碳酸酯的光学材料和吹塑材料。这种聚碳酸酯含有较少的杂质,如剩余的单体、低聚物和其他物质,具有更好的物理性能,包括冲击强度,可用作光学材料和吹塑材料。