Protective coating composition and process for aluminum and aluminum alloys
US4515919A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 1983 |
| Grant date | May 7, 1985 |
| Priority date | — |
| Expiry date | May 9, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2150/90
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A protective coating composition and process is described for simultaneously sealing and priming the anodic coating applied to aluminum and alloys thereof without the need for elevated temperatures during a subsequent curing step. The composition comprises a colloidal, water-borne polyurethane resin which is an aromatic, aliphatic or alicyclic copolymer. The composition is curable at ambient temperatures but may include a cross-linking agent as well as a thermosetting catalyst. The process comprises the steps of anodizing the component to be coated, applying the coating composition at elevated temperatures to thereby simultaneously seal and prime the component and curing the sealed and primed component at ambient temperatures. If cross-linking agents are employed then elevated cure temperatures are utilized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.