Patent ID: 7825176

Claim:
A polyester molding composition of high flowability comprising (a) about 5 to about 99% by weight of at least one polyester, wherein the polyester is a poly(alkylene phthalate), poly(alkylene isophthalate), poly(alkylene terephthalate), poly(cycloalkylene terephthalate), poly(cycloalkylene cycloaliphatic dicarboxylate), poly(alkylene dicarboxylate), esteramide copolymers, a copolyester derived from structural units comprising at least one alkane diol or cycloaliphatic diol and at least one aromatic diacid, aliphatic diacid or cycloaliphatic diacid or a combination thereof, and wherein the polyester has a weight average molecular weight, M w , in the range 10,000 to 120,000 daltons; and (b) about 0.05 to about 2% by weight of an alcohol of structure I, where, R 1 =NH 2 ; R 2 =CH 3 , CH 3 CH 2 , CH 2 OH or any of a C1-C20 alkyl group optionally having one or more hydroxy group substituent, C3-C20 cycloalkyl group, C6-C20 aryl group, C1-C20 alkoxy group which optionally has one or more hydroxy group substituent or C6-C20 aryloxy group; and (c) at least one impact modifier selected from graft or core shell acrylic rubbers, diene rubber, organosiloxane rubber, ethylene propylene diene monomer rubber, styrene-butadiene-styrene rubber, styrene-ethylene-butadiene-styrene rubber, acrylonitrile-butadiene-styrene rubber, methacrylate-butadiene-styrene rubber, styrene acrylonitrile copolymer, and glycidyl ester impact modifier.