Use of bisphenol in preparing polycarbonic ester and opoxy resin

Application Number: 00106920
Application Date: 1996.08.14
Publication Number: 1290683
Publication Date: 2001.04.11
Priority Information: 1995/8/14 DE 19529855.1
International: C07C39/16;C08G59/00;C08G64/00
Applicant(s) Name: Bayer AG
Inventor(s) Name: K.-P. Moler;T. Van Osalar;W. Farhofen
Patent Agency Code: 72001
Patent Agent: tan mengsheng
Abstract The invention relates to a method for preparing bisphenol A which has a purity of at least 99.95 wt. % of p,p-bisphenol A (BPA). Thermally stable and colour-stable BPA purified in accordance with the invention produces improved thermal and colour stability and improved optical transparency in polymers such as e.g. polycarbonates prepared therefrom.