Polyester molding composition
AssigneeHoechst Celanese Corporation
InventorsArie A. Hochberg, Varkki P. Chacko, Paul DeStio
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Abstract
A thermoplastic molding composition comprising a polyester blend of polybutylene terephthalate and a copolyester derived from condensing ethylene glycol, cyclohexanedimethanol and terephthalic acid wherein the ethylene glycol units of the copolyester comprises at least 25 mole % based on the total glycol content. The polyester blend can also include an impact modifier. The blend is useful in the formation of molded keycaps.
Claims19
A composition comprising a polyester blend of 50 to 90% by weight of said blend of polybutylene terephthalate consisting essentially of recurring 1,4-butylene terephthalate units, and 10 to 50% by weight of said blend of a copolyester consisting essentially of condensed units of ethylene glycol, cyclohexane dimethanol and terephthalic acid, said copolyester containing about 70 mol% of said ethylene glycol units relative to the total glycol content.
Dependencies are inferred from the claim text.