Patent ID: 9034983
Filing Date: 2015-05-19
Classification: C08G,C08K,C08L,C09D,Y02P

Abstract:
1. A method for the manufacture of a poly(butylene terephthalate-co-adipate) copolymer, the method comprising: (a) polymerizing 1,4-butanediol and an acid component comprising, based on the total acid component, wherein polymerization occurs in the presence of a catalyst under conditions effective to form poly(butylene terephthalate-co-adipate) oligomers; (b) adding a catalyst quencher selected from the group consisting of a phosphorus-containing compound, a nitrogen containing compound, a boron-containing compound, and combination thereof; and (c) reacting the quenched poly(butylene terephthalate-co-adipate) oligomers with from 0.05 to 5 weight %, based on total weight of poly(butylene terephthalate-co-adipate) oligomer, of a chain extender selected from the group consisting of isocyanurate, polyisocyanate, isocyanate and combinations thereof, to form the poly(butylene terephthalate-co-adipate) copolymer, wherein the copolymer has: a melt temperature of 100 to 125° C., a number average molecular weight of at least 40,000 to 200,000 g/mole, an intrinsic viscosity of at least 1.2 deciliter per minute, and a T wherein the poly(butylene terephthalate-co-adipate) copolymer exhibits an L* value of at least 75.