Positive-charged ultrafiltration membrane for the separation of cathodic electrodeposition paint compositions
US4849106A · kind A · utility
8Cited by
6References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 10, 1987 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Jul 10, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/80
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Method for preparing a fouling-resistant polymer membrane for use in the separation of aqueous, cathodic, electrode-position-paint compositions, which method comprises treating a negative-charged polymer membrane material, having fixed negative-charged groups in the polymer, with a polyelectrolyte polymer having fixed positive-charged nitrogen groups in an amount sufficient to provide for an excess of positive-charged groups in the treated membrane polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.