Copolyesters derived from aliphatic glycols, aromatic dicarboxylic acids and poly(alkylene-oxides) and films made therefrom
AssigneeMylar Specialty Films U.S. Limited Partnership
InventorsStephen Jones, Stephen Sankey, Lucien Schosseler, Megan Meaburn, David Turner
Life of this patent
Estimating the term…
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 seperator in a lithium-ion rechargeable battery
Claims20
A copolyester composition comprising a copolyester which comprises repeating units derived from an aliphatic glycol, an aromatic dicarboxylic acid and a poly(alkylene oxide), wherein the copolyester composition further comprises lithium ions, wherein the fraction (SW) of repeating units derived from aromatic dicarboxylic acid and poly(alkylene oxide) is in the range of from about 5 to about 50%.
Dependencies are inferred from the claim text.