Invention Application
- Patent Title: COPOLYESTERS DERIVED FROM ALIPHATIC GLYCOLS, AROMATIC DICARBOXYLIC ACIDS AND POLY(ALKYLENE-OXIDES) AND FILMS MADE THEREFROM
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Application No.: US17040459Application Date: 2019-03-28
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Publication No.: US20210024688A1Publication Date: 2021-01-28
- Inventor: Stephen Jones , Stephen Sankey , Lucien Schosseler , Megan Todd , David Turner
- Applicant: DuPont Teijin Films U.S. Limited Partnership
- Applicant Address: US DE Wilmington
- Assignee: DuPont Teijin Films U.S. Limited Partnership
- Current Assignee: DuPont Teijin Films U.S. Limited Partnership
- Current Assignee Address: US DE Wilmington
- Priority: GB1804961.9 20180328
- International Application: PCT/GB2019/050894 WO 20190328
- Main IPC: C08G63/68
- IPC: C08G63/68 ; C08J5/22 ; C08G63/672 ; C08K5/098 ; H01M10/0525 ; H01M2/16 ; H01M10/056
Abstract:
An optionally oriented copolyester film comprising a copolyester which comprises repeating units derived from an aliphatic diol, an aromatic dicarboxylic acid and a poly(alkylene oxide), wherein the copolyester film further comprises lithium ions, and wherein the film has a thickness of no more than about 25 μm. The copolyester film is suitable for use a separator in a lithium-ion rechargeable battery.
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