Patent ID: 6492486
Filing Date: 2002-12-10
Classification: C08G,C08L

Abstract:
A method for making a polycarbonate blend comprising the steps of:(a) combining a bisphenol A polycarbonate polymer and a modifying copolymer, wherein the bisphenol A polycarbonate polymer and the modifying copolymer are different materials; and (b) mixing the combined materials to form a homogeneous blend; wherein the modifying copolymer comprises residues of bisphenol A, 4-[1-[3-(4-hydroxyphenyl)-4-methylcyclohexyl]-1-methylethyl]phenol (hereinafter referred to as BPT-1) and 4,4â€²-[1-methyl-4-(1-methylethyl)-1,3-cyclohexandiyl]bisphenol (hereinafter referred to as BPT-2), wherein BPT-1 and BPT-2 residues are present in the modifying copolymer in a ratio, BPT-1/BPT-2, that is less than or equal to 1/1.