Copolyesters derived from aliphatic glycols, aromatic dicarboxylic acids and poly(alkylene-oxides) and films made therefrom
US12180333B2 · kind B2 · utility
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29Claims
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Key dates
| Filing date | Mar 28, 2019 |
| Grant date | Dec 31, 2024 |
| Priority date | — |
| Expiry date | Jan 9, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.