Patent ID: 8969506
Filing Date: 2015-03-03
Classification: C08G,C08L

Abstract:
1. A method of manufacture of an amorphous copolyester consisting essentially of polymerizing, in the presence of an esterification catalyst: (c) a monomer of formula I wherein R a is 0-1, b is 0-4, c is 0-4, and d is 0-3, and each R (b) more than 38 to 43 mol % of a virgin monomer selected from terephthalic acid, a di(C (c) about 50 mol % of 1,4-cyclohexane dimethanol; wherein the residue of monomer (a) is present in an amount from 7 to less than 12 mole % of the copolyester based on moles of repeat units in the polyester; and wherein the copolyester has a glass transition temperature of at least 107° C., an intrinsic viscosity of at least 0.7 dl/g, and a molded sample has a Notched Izod value of at least 290 J/m determined in accordance with ASTM D256 wherein the method further comprises heating the components to a temperature within the range of 220° C. to 270° C. during polymerization.