Patent ID: 7868090

Claim:
A composition comprising, based on the total weight of the composition: a. from 60 to 99 weight percent of a polyester derived from a diol and a diacid, b. from 0.5 to 15 weight percent of a fluoropolymer, wherein the fluoropolymer comprises a homopolymer or copolymer comprising structural units derived from a fluorinated alpha-olefin monomer, or a fluorinated alpha-olefin monomer and a non-fluorinated monoethylenically unsaturated monomer, c. from 0.1 to 5 weight percent of a carboxy reactive compound selected from the group consisting of multifunctional epoxy compounds, epoxy silanes, imidazolines, oxazolines, reactive impact modifiers, and combinations thereof, d. optionally, from 0 to 40 weight percent of a thermoplastic resin with an intrinsic viscosity of greater than 0.8 dl/g, e. optionally, from 0 to 35 weight percent filler, f. optionally, an unreactive impact modifier, and g. optionally, a catalyst for the carboxy reactive compound, wherein the polyester, the fluoropolymer, and the carboxy reactive compound are present in sufficient amounts for the composition to have at least 20% higher impact strength as measured at ambient temperature in accordance with ISO 180 test method, and at least 20% higher tensile elongation at break as measured in accordance with ISO 527 test method, as compared to a composition containing the polyester and either the fluoropolymer or the carboxy reactive compound, and wherein the fluoropolymer is encapsulated and the encapsulating polymer is selected from the group consisting of styrene-acrylonitrile copolymers, acrylonitrile-butadiene-styrene copolymers, alpha-alkyl-styrene-acrylonitrile copolymers, alpha-methylstyrene-acrylonitrile copolymers, styrene-butadiene rubbers, and combinations thereof.