Process for the production of a polymeric film on a metal surface, and concentrate and treatment liquid therefor
US6468597B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 2000 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Sep 28, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05D7/14
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention relates to a method for producing a plastic film on metal surfaces, and a treatment liquid for producing this film. The treatment liquid, prior to wetting the metal, contains 0.1 to 50% (by weight) of a non-volatile film-forming mixture of resins, and 99.9 to 50% of a water-miscible, water-soluble or water solvent, and forms a film on the metal. The treatment liquid, just prior to wetting the metal, has a temperature of 10-100° C., and the metal surface has a temperature higher than the treatment liquid by at least 20° C. and a temperature in the region of 30 to 700° C. The treatment liquid is adjusted in such a way that its constituents do not substantially coagulate, settle or decompose, and such that the molecular weight distribution and the viscosity of the treatment liquid does not substantially change during use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.