Solvent phosphatizing compositions yielding non water soluble coatings
US4029523A · kind A · utility
4Cited by
9References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1975 |
| Grant date | Jun 14, 1977 |
| Priority date | — |
| Expiry date | Mar 20, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C22/03
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A liquid phosphatizing composition, containing organic solvent such as 1,1,1-trichlorethane or trichlorofluoromethane, can provide phosphate coatings on metal articles. In addition to the organic solvent, the composition contains a phosphatizing proportion of phosphoric acid and a solubilizing liquid capable of solubilizing phosphoric acid in the organic solvent. Most critically, the composition contains water in an amount exceeding the proportion of phosphoric acid, yet, the water-containing liquid composition maintains liquid phase homogeneity. Phosphatized coatings of desirable water insolubility are obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.