Cushman, Darby & Cushman
Polyester composition
 As an outline of the invention of the present inventors, the gist of the present invention resides in the following: A polyester composition comprising: PA1 (A) 100 parts by weight of a substantially linear polyester comprising, as the main constituent unit, ethylene terephthalate; PA1 (B) 0.05 to 15 parts by weight of a crystallization promotor; and PA1 (C) 0.1 to 15 parts by weight of at least one plasticizer selected from the group consisting of (C.sub.1), (C.sub.2), (C.sub.3) and (C.sub.4) which are defined as follows: PA1 (C.sub.1) a condensation product of a compound of the formula (I): EQU (HQ-R).sub.2 S (I) PA1 wherein two R groups may be the same as or different from each other and represent a hydrocarbon group selected from the group consisting of aliphatic, alicyclic, and aromatic hydrocarbon groups and any combination thereof, and two Q groups may be the same as or different from each other and represent oxygen or sulfur, with an organic compound containing two alcoholic or phenolic hydroxyl groups: PA1 (C.sub.2) an ester compound derived from an organic acid and a compound selected from the group consisting of compounds of the above-mentioned formula (I) and the condensation products (C.sub.1). PA1 (C.sub.3) an ether compound derived from a compound selected from the group consisting of compounds of the above-mentioned formula (I) and the condensation products (C.sub.1) and a compound selected from the group consisting of monohydric alcohols and monohydric phenols. PA1 (C.sub.4) a modified polyolefin wax selected from oxidized polyolefin waxes, unsaturated carboxylic acid or its derivative graft-modified polyolefin waxes, unsaturated epoxy compound-modified polyolefin waxes, unsaturated silane compound-modified polyolefin waxes, and styrene type monomer-modified olefin waxes. 
Mitsui Petrochemical Industries, Ltd.
C C
C08L C08K
inventional inventional
Takayuki Takashi Akira Takashi
Nakano Nagai Tohdoh Ueda