Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Separator – retainer – spacer or materials for use therewith
Patent
1978-08-01
1980-07-01
Walton, Donald L.
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Separator, retainer, spacer or materials for use therewith
429254, 428241, H01M 216
Patent
active
042107091
ABSTRACT:
A microporous film which comprises a matrix comprising 40 to 90 volume percent of a polyolefin having a number average molecular weight of 15,000 or more and 10 to 60 volume percent of an inorganic filler, said matrix having therein void spaces at a rate of 30 to 75 volume percent based on the volume of the film; and 2 to 20 weight percent, based on the total weight of the polyolefin and the inorganic filler, of an organic substance which is substantially insoluble in and inert to sulfuric acid and has a solubility parameter ranging from 7.3 inclusive to 8.4 exclusive; said organic substance, in its majority, adhering to the overall surface of the film including the outer surfaces of the film and the surfaces of the polyolefin walls defining said void spaces in cooperation with said inorganic filler.
REFERENCES:
patent: 2676929 (1954-04-01), Duccy
patent: 2700694 (1955-01-01), Fernald
patent: 3351495 (1967-11-01), Larsen
German Patent Application No. P26 27 229.7, Doi et al., 10/3/77.
Doi Yoshinao
Fugii Osamu
Hanamura Takeo
Kaneko Shigeo
Asahi Kasei Kogyo Kabushiki Kaisha
Walton Donald L.
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