Acid release stabilized molding polyesters

Details Acid release stabilized molding polyesters Acid release stabilized molding polyesters

C - Chemistry, Metallurgy

08

K

18/1120, 400/570

C08K 5/34 (2006.01) C08K 5/3445 (2006.01) C08L 67/02 (2006.01)

Patent

CA 1212195

ABSTRACT OF THE DISCLOSURE A thermoplastic polyester composition comprising a thermoplastic polyester resin containing a moiety derived from an aromatic dibasic acid, as a predominant acid moiety and a hydantoin compound in an amount sufficient to substantially retard evolution of aromatic dibasic acid vapor during melt processing of the composition. A method of preventing mold deposits during a molding operation of a thermoplastic polyester resin containing an aromatic dibasic acid as a predominant acid moiety comprising the addition of 0.01 to 10 parts by weight of a hydantoin compound per 100 parts by weight of the polyester resin. The aromatic dibasic acid is preferably terephthalic acid and the thermoplastic polyester resin is preferably selected from the group of polyethylene terephthalate, polytrimethylene terephthalate, polytetramethylene terephthalate and blends thereof.

414364

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