Polyacrylic acid membranes for electrochemical use

Details Polyacrylic acid membranes for electrochemical use Polyacrylic acid membranes for electrochemical use

1977-12-14

1978-08-22

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Separator, retainer or spacer insulating structure

427115, 429249, 429204, 429254, 521 62, H01M 1004, H01M 216

Patent

active

041090667

ABSTRACT:
The invention relates to a semi-permeable membrane for a lead-acid battery. The membrane has a microporous structure comprising a first polymer and a second polymer intimately mixed together, and is characterized by the fact that the first polymer is chosen from among the following polymers: polyacrylic acid, polymethacrylic acid, a copolymer with a high proportion of acrylic or methacrylic acid, a mixture of these polymers, the average molecular weight of these polymers lying between 10,000 and a few millions and preferably between 50,000 and one million, the second polymer being soluble in water.

REFERENCES:
patent: 2700694 (1955-01-01), Fernald
patent: 3069340 (1962-12-01), Mindick et al.
patent: 3730777 (1973-05-01), Krey
patent: 4024323 (1977-05-01), Versteegh

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