Process for forming composite film on aluminum or aluminum alloy article surface and resulting product
US5308709A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1992 |
| Grant date | May 3, 1994 |
| Priority date | — |
| Expiry date | Jan 23, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A film forming process which imparts excellent formability, corrosion resistance and paintability to the surface of aluminum or aluminum alloy plates or aluminum-plated sheet steel. A process for forming composite film on the surface of aluminum or aluminum alloy plates which comprises preliminarily treating the surface with a chromating liquid to form a chromate film on the surface, and then coating on the chromate film an organic macromolecular resin composition comprising urethane resin and at least one kind of resin selected from polyester resin and epoxy resin, a wax as a lubricating additive and further a silica sol, followed by drying, to form a film layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.