Copolycarbonates of phenolphthalein polycarbonates and other polycarbonates and their preparation
申请人:THE DOW CHEMICAL COMPANY
公开号:EP0013282A1
公开(公告)日:1980-07-23
This invention is directed to a copolycarbonate of a polycarbonate of a trityldiol such as phenolphthalein and a polycarbonate of another diol such as bisphenol-A and to a process for preparing the copolycarbonate. The copolycarbonate is prepared by contacting the starting polycarbonates under conditions of shear and/or temperature sufficient to cause reaction of the polycarbonates to form a copolycarbonate of the polycarbonates. The copolycarbonates of this invention exhibit generally improved impact resistance, clarity and flame resistance as compared with the starting polycarbonates.
本发明涉及一种三元二醇(如酚酞)聚碳酸酯与另一种二元醇(如双酚 A)聚碳酸酯的共聚碳酸酯,以及制备该共聚碳酸酯的工艺。共聚碳酸酯的制备方法是:在剪切力和/或温度足以使聚碳酸酯发生反应形成聚碳酸酯的共聚碳酸酯的条件下,使起始聚碳酸酯接触。与起始聚碳酸酯相比,本发明的共聚碳酸酯通常具有更好的抗冲击性、透明度和阻燃性。