Method for making uniform polyvinylidene difluoride membranes
US5196508A · kind A · utility
3Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1991 |
| Grant date | Mar 23, 1993 |
| Priority date | — |
| Expiry date | Jun 6, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/34
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method is provided for enhancing the characteristics of a hydrophobic polyvinylidene difluoride membrane which comprises heating the membrane to a temperature of at least 80.degree. C. but less than the temperature at which the membrane softens and deforms for a time sufficient to achieve a state such that, when the membrane is subsequently hydrophilized, the membrane has substantially uniform hydrophilic properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.