18724373. PROCESS FOR PRODUCING VARIOUS MOLECULAR WEIGHT POLYESTERS (SABIC GLOBAL TECHNOLOGIES B.V.)
PROCESS FOR PRODUCING VARIOUS MOLECULAR WEIGHT POLYESTERS
Organization Name
SABIC GLOBAL TECHNOLOGIES B.V.
Inventor(s)
Keshavaraja Alive of Evansville IN (US)
Mark Erik Nelson of Mt. Vernon IN (US)
PROCESS FOR PRODUCING VARIOUS MOLECULAR WEIGHT POLYESTERS
This abstract first appeared for US patent application 18724373 titled 'PROCESS FOR PRODUCING VARIOUS MOLECULAR WEIGHT POLYESTERS
Original Abstract Submitted
In an aspect, a method for reducing the molecular weight of a polyester, comprises mixing a composition comprising a polyester oligomer and a polyester in a molten state to form a modified polyester; wherein the mixing occurs at a temperature of 230 to 330° C.; wherein the polyester oligomer is present in an amount of 0.1 to 50 weight percent based on 5 the total weight of the composition; wherein the polyester comprises a Calkyl phthalate polyester having a weight average molecular weight, Mw, of 15,000 to 100,000 g/mol determined using gel permeation chromatography based on polystyrene standards; and wherein the modified polyester has a weight average molecular weight, Mw, of at least 5% less than the weight average molecular weight of the polyester.