Tannin mannich adducts for improving corrosion resistance of metals
US4944812A · kind A · utility
18Cited by
6References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1988 |
| Grant date | Jul 31, 1990 |
| Priority date | — |
| Expiry date | Nov 16, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C22/68
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A vegetable tannin is condensed with formaldehyde and an amine to provide an acid soluble product which is useful in a metal treatment solution to enhance corrosion resistance and paint adhesion characteristics of a metal surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.