Non-chromate conversion coating treatment for metals
US7344607B2 · kind B2 · utility
29Cited by
21References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2003 |
| Grant date | Mar 18, 2008 |
| Priority date | — |
| Expiry date | Nov 28, 2023 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H19/30
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Chromate-free treatments and compositions, for applying a conversion or passivation coating to zinc coated metal surfaces. The compositions comprise a polyamidoamine/epihalohydrin polymer or cationic polyamine/epihalohydrin polymer component, fluoacid, H3PO4, and a film forming polymer latex component. The requisite metal surfaces are contacted by the compositions and dried. Rinsing is optional.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.