Polyester compositions containing cyclobutanediol having a certain combination of inherent viscosity and moderate glass transition temperature and articles made therefrom

US8507638B2 · kind B2 · utility

Assignee

• Eastman Chemical Company · US

Inventors

• Emmett Dudley Crawford · Kingsport, US
• Thomas Joseph Pecorini · Kingsport, US
• Douglas Stephen McWilliams · Elizabethton, US
• David Scott Porter · Middlebury, US
• Gary Wayne Connell · Church Hill, US
• Ted Calvin Germroth · Kingsport, US
• Benjamin Fredrick Barton · Kingsport, US
• Damon Bryan Shackelford · Kingsport, US

Key dates

• Filing date: Aug 23, 2011
• Grant date: Aug 13, 2013
• Expiry date: Aug 23, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31786
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Described are polyesters comprising (a) a dicarboxylic acid component comprising terephthalic acid residues; optionally, aromatic dicarboxylic acid residues or aliphatic dicarboxylic acid residues; 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues; and cyclohexanedimethanol residues. The polyesters have a desirable combination of inherent viscosity and glass transition temperature (“Tg”). The polyesters can have an inherent viscosity from 0.35 to 1.2 dL/g as determined in 60/40 (wt/wt) phenol/tetrachloroethane at a concentration of 0.5 g/100 ml at 25° C. and a Tg of 85 to 115° C. The polyesters may be manufactured into articles such as fibers, films, bottles or sheets.