Polyacrylic acid membranes for electrochemical use
US4109066A · kind A · utility
9Cited by
4References
18Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 14, 1977 |
| Grant date | Aug 22, 1978 |
| Priority date | — |
| Expiry date | Dec 14, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldChemical engineering
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.