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.