Patent ID: 8716404
Filing Date: 2014-05-06
Classification: C08L

Abstract:
1. A composition comprising or produced from, based on the weight of the composition, about 70 to about 99.8% of a polyester and a modifier wherein the polyester is selected from the group consisting of poly(trimethylene terephthalate), poly(tetramethylene terephthalate), and combinations thereof; the modifier is a modified ionomer; the modified ionomer comprises or is produced from, an ethylene ionomer modified with a C the fatty acid is optionally substituted with a C the ethylene ionomer is produced by neutralizing at an ethylene acid copolymer; the ethylene acid copolymer is comprises repeat units derived from ethylene, a C the ethylene ester copolymer comprises repeat units derived from ethylene and a second comonomer which is the same as or different from the first comonomer; the first or second comonomer is independently a C from about 75% to about 100% of the combined acid moieties in the modifier are neutralized to form salts with metal cations; the final concentration of the modifier in the composition is about 0.1 to about 20 weight % such that the melt viscosity of the composition is lower than that of the polyester; and the cations comprise at least about 75 equivalent % selected from the group consisting of magnesium, calcium, zinc, and combinations of two or more thereof.