logo

For the Inventor, By the Inventor

The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11427688 B1

PDFFull Text
Date of Patent:
Aug. 30, 2022

Filed:

Jan. 10, 2018

Copolyesters plasticized with polymeric plasticizer

Applicant:

Eastman Chemical Company, Kingsport, TN (US);

Inventors:

Wayne Ken Shih, Kingsport, TN (US);

Kimberley Carmenia Carico, Kingsport, TN (US);

Assignee:

Eastman Chemical Company, Kingsport, TN (US);

Attorneys:

C. Stuart Everett

Tammye L. Taylor Polk

Primary Examiner:

Vivian Chen

Int. Cl.
CPC ...
C08J 5/18 (2006.01); C08J 3/18 (2006.01); C08K 5/10 (2006.01); B32B 27/30 (2006.01); B32B 27/36 (2006.01); B32B 7/12 (2006.01); B32B 38/00 (2006.01); B29C 48/88 (2019.01); B29C 48/00 (2019.01); B29C 48/08 (2019.01); B29D 11/00 (2006.01); C08L 67/02 (2006.01); G02B 5/30 (2006.01); C08J 7/04 (2020.01); C08J 7/043 (2020.01); B32B 27/16 (2006.01); B32B 27/22 (2006.01); B32B 27/18 (2006.01); B32B 37/12 (2006.01); C08K 5/00 (2006.01); C08K 3/38 (2006.01);
U.S. Cl.
CPC ...
C08J 5/18 (2013.01); B29C 48/0018 (2019.02); B29C 48/08 (2019.02); B29C 48/919 (2019.02); B29D 11/00644 (2013.01); B32B 7/12 (2013.01); B32B 27/306 (2013.01); B32B 27/36 (2013.01); B32B 38/0012 (2013.01); C08J 3/18 (2013.01); C08J 7/043 (2020.01); C08J 7/0427 (2020.01); C08K 5/10 (2013.01); C08L 67/02 (2013.01); G02B 5/3033 (2013.01); B29D 11/00 (2013.01); B29D 11/0073 (2013.01); B32B 27/16 (2013.01); B32B 27/18 (2013.01); B32B 27/22 (2013.01); B32B 37/12 (2013.01); B32B 2038/0028 (2013.01); B32B 2250/02 (2013.01); B32B 2307/42 (2013.01); B32B 2329/04 (2013.01); B32B 2367/00 (2013.01); C08J 2367/02 (2013.01); C08J 2367/03 (2013.01); C08J 2429/04 (2013.01); C08J 2467/02 (2013.01); C08J 2467/03 (2013.01); C08K 3/38 (2013.01); C08K 5/0016 (2013.01); C08L 2203/16 (2013.01); Y10T 428/31786 (2015.04); Y10T 428/31797 (2015.04);
Abstract

Polyester-based films contain certain copolyesters (A) and polyester plasticizers (B). The copolyesters (A) may be selected from those in which the force required to stretch a film of the copolyester (A) by itself, from 2× to 5×, increases by less than 200%. The polyester plasticizers (B) have a weight-average molecular weight of 900 to 12,000 g/mol, and contain (i) a diol component comprising residues of diols having 2 to 8 carbon atoms, and (ii) a diacid component comprising residues of dicarboxylic acids having 4 to 12 carbon atoms. These polyester-based films are particularly useful for preparing ultra-thin LCD or OLED polarizers, because they can be stretched very thin with a high stretch ratio at lower temperatures.

Find Patent Forward Citations

Loading…