METHOD OF PREPARING TRANSPARENT SILICONE-CONTAINING COPOLYCARBONATES

摘要

Silicone-containing copolycarbonates possessing relatively long siloxane chains and yet having low haze values and hence transparency are prepared by reacting a siloxane bischloroformate with a hydroxy- terminated polycarbonate oligomer to afford a silicone-containing polycarbonate intermediate which is then reacted with a bisphenol, phosgene and chainstopper under interfacial reaction conditions to afford a product silicone-containing copolycarbonate. The product silicone- containing copolycarbonates have lower haze values than similarly constituted copolycarbonates prepared by other methods.