Patent · US Active

Thermoformed sheet(s) comprising polyester compositions which comprise cyclobutanediol

US7838620B2 · kind B2 · utility

8Cited by

225References

33Claims

0Family size

Assignee

Eastman Chemical Company · US

Inventors

Emmett Dudley Crawford · Kingsport, US
Douglas Stephens McWilliams · Kingsport, US
David Scott Porter · Middlebury, US
Gary Wayne Connell · Church Hill, US

Key dates

Filing date	Mar 28, 2006
Grant date	Nov 23, 2010
Priority date	—
Expiry date	Apr 12, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31786
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Described are thermoformed films or sheets comprising polyester compositions comprising polyesters which comprise (a) a dicarboxylicacidcomponent having terephthalic acid or an ester thereof; optionally, an aromatic dicarboxylic acid or aliphatic dicarboxylic acid or esters thereof; 2,2,4,4-tetramethyl-1,3-cyclobutanediol; and 1,4-cyclohexanedimethanol.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.