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1. (WO2018035335) POLYESTER COMPOSITIONS WHICH COMPRISE TETRAMETHYL CYCLOBUTANEDIOL AND ETHYLENE GLYCOL, WITH IMPROVED CATALYST SYSTEM

Pub. No.:    WO/2018/035335    International Application No.:    PCT/US2017/047364
Publication Date: Fri Feb 23 00:59:59 CET 2018 International Filing Date: Fri Aug 18 01:59:59 CEST 2017
IPC: C08G 63/183
C08G 63/85
C08G 63/199
Applicants: EASTMAN CHEMICAL COMPANY
Inventors: CRAWFORD, Emmett, Dudley
GOETZ, James, Thomas
CARICO, Douglas, Weldon
COGGINS, Michael, Keith
Title: POLYESTER COMPOSITIONS WHICH COMPRISE TETRAMETHYL CYCLOBUTANEDIOL AND ETHYLENE GLYCOL, WITH IMPROVED CATALYST SYSTEM
Abstract:
Described as one aspect of the invention are polyester compositions including at least one polyester which comprises: (a) a dicarboxylic acid component comprising about 90 to about 100 mole % of terephthalic acid residues; and (b) a glycol component comprising: (i) about 10 to about 27 mole % 2,2,4,4-tetramethyl-1,3- cyclobutanediol residues; and (ii) about 73 to about 90 mole % ethylene glycol residues; wherein the total mole % of the dicarboxylic acid component is 100 mole %, and wherein the total mole % of the glycol component is 100 mole %; wherein the inherent viscosity of the polyester is from 0.50 to 0.8 dL/g; and wherein the L* color values for the polyester is 90 or greater. The polyesters may be manufactured into articles.