Heat resistant substrates and battery separators made therefrom
US3953241A · kind A · utility
33Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1973 |
| Grant date | Apr 27, 1976 |
| Priority date | — |
| Expiry date | Mar 26, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A flexible substrate having a caustic resistant support and at least one membrane comprising a solid polymeric matrix containing a network of interconnected pores and interdispersed inorganic filler particles with a ratio of filler: polymer in the polymeric matrix of between about 1:1 to 5:1, is made by coating at least one side of the support with a filler:coating formulation mixture of inorganic filler particles and a caustic resistant, water insoluble polymer dissolved in an organic solvent, and removing the solvent from the mixture to provide a porous network within the polymeric matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.