Zinc phosphate tungsten-containing coating compositions using accelerators
US5653790A · kind A · utility
15Cited by
30References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1996 |
| Grant date | Aug 5, 1997 |
| Priority date | — |
| Expiry date | Feb 16, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C22/44
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Zinc phosphate aqueous coating compositions containing tungsten and using an accelerator which is an oxime, hydroxylamine sulfate or a mixture thereof are disclosed. The accelerators are environmentally friendly and stable in the acidic environment of zinc phosphate coating compositions so as to enable formation of a one-package system. The tungsten component avoids the use of nickel or cobalt ions in the compositions which are environmentally objectionable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.