Modified polyester composition
AssigneeGeneral Electric Company
InventorsEdwin J. Goedde, Fred F. Holub, Phillip S. Wilson
Life of this patent
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Abstract
Modified thermoplastic polyester compositions are provided which comprise (a) a poly(1,4-butylene terephthalate) resin and, optionally, a poly(ethylene terephthalate) resin and (b) a modifier therefor comprising (i) a silane-treated clay; (ii) acicular calcium metasilicate, (iii) a combination of segmented copolyester and an aromatic polycarbonate; or (iv) novaculite or a combination thereof. The modifiers provide easier processability and enhanced resistance to warpage in articles molded from the compositions.
Claims17
A thermoplastic composition comprising:
- (a) a polyester composition comprising, in intimate admixture, a poly(1,4-butylene terephthalate) resin and a poly(ethylene terephthalate) resin and
- (b) an amount of up to 60 parts per 100 parts by weight of (a) and (b) of a modifier therefor comprising:
- (i) a silane-treated clay;
- (ii) acicular calcium metasilicate;
- (iii) a combination of a segmented copolyester and an aromatic polycarbonate;
- or
- (iv) novaculite, or a mixture thereof, said composition being more readily moldable to articles having improved dimensional stability in comparison with the corresponding compositions wherein the modifer is not present.
A thermoplastic composition comprising:
- (a) a poly(1,4-butylene terephthalate) and
- (b) a modifier therefor comprising in combination
- (v) an aminosilane-treated clay;
- and
- (vi) a segmented copolyester, said compositions being more readily moldable to articles having improved dimensional stability in comparison with the corresponding compositions wherein the modifier is not present.
Dependencies are inferred from the claim text.