Wettable battery separator and process therefor

Details Wettable battery separator and process therefor Wettable battery separator and process therefor

1974-10-07

1976-04-20

Mack, John H.

Batteries: thermoelectric and photoelectric

Thermoelectric

Radiation pyrometer

136146, 136148, H01M 216, H01M 200

Patent

active

039516911

ABSTRACT:
This invention relates to a process for imparting permanent wettability to a battery separator comprising a non-woven mat of polyolefin fiber by impregnating said battery separator with an .alpha.-olefin/.alpha.,.beta.-unsaturated acid or anhydride copolymer or terpolymer dissolved in water by reaction with a base and thereafter causing the copolymer or terpolymer to revert to a water-insoluble substantially free acid form by either heating the impregnated battery separator to drive off the base or exposing the impregnated separator to acid. Water-insoluble herein refers to aqueous media having a pH from acidic to essentially neutral.

REFERENCES:
patent: 3595698 (1971-07-01), Kordesch
patent: 3615865 (1971-10-01), Wetherell
patent: 3629161 (1971-12-01), Paine
patent: 3811957 (1974-05-01), Buntin

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