BLEND OF POLYESTER WITH POLYCARBONATE HAVING SUPERIOR TRANSPARENCY AND HEAT RESISTANCE

摘要

A polyester/polycarbonate blend is provided to solve the problem of degradation of transparency in the conventional polyester/polycarbonate blend while ensuring excellent heat resistance. A polyester/polycarbonate blend comprises: (a) a polyethylene terephthalate(PET) comprising terephthalic acid, ethylene glycol and C3-C6 alkylene glycol, or PET copolymerized with 1-10 mol% of isophthalic acid, cyclohexane dimethanol(CHDM) or diethylene glycol based on the acid or diol component; (b) a polycarbonate(PC); and (c) a high-CHDM glycol-modified PET containing CHDM coplymerized with the diol component in an amount of 20-80 mol%. The content of PC is 10-60 wt% based on the blend of PET(a)/PC, and the content of high-CHDM glycol-modified PET corresponds to a weight ratio of 0.2-2.5 based on PC.