Positive-charged ultrafiltration membrane for the separation of cathodic/electrodeposition-paint compositions
US4412922A · kind A · utility
15Cited by
5References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 21, 1981 |
| Grant date | Nov 1, 1983 |
| Priority date | — |
| Expiry date | Sep 21, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D13/24
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A 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.