Patent ID: 7495065

Claim:
A method of preparing an end-capped polycarbonate resin comprising: mixing a polycarbonate having hydroxy terminal groups and a compound of formula (1) wherein n=1 to 10; each of R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 is independently selected from hydrogen, a halogen atom, an alkyl group having 1-18 carbon atoms, an alkoxy group having 1-18 carbon atoms, an aryl group having 6-18 carbon atoms, an araryl group having 7-18 carbon atoms, or an aralkoxy group having 7-18 carbon atoms; a and b are integers from 0 to 4, and c and d are integers from 0 to 5, at normal temperature and pressure to obtain a mixture; and melt reacting the mixture at 250-320° C. and reduced pressure of 0.1 to 500 mmHg to reduce the final concentration of the hydroxy terminal groups of the polycarbonate resin.