Liquid coating composition for metal surfaces, and a process for coating them with such a coating composition
US4424239A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 23, 1982 |
| Grant date | Jan 3, 1984 |
| Priority date | — |
| Expiry date | Dec 23, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D177/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention provides for a coating composition for metal surfaces wherein the binder is made up of (A) 10-80% by weight of a solid, powdered polyamide having a softening point of 110.degree.-230.degree. C. and an average particle size of 0.5-200 .mu. m, (B) 20-90% by weight of a hydroxyl groups-containing polymer having a number average molecular weight of 800-20,000 and a hydroxyl functionality of 1.5-6, and the composition also contains a cross-linking agent for component B in an amount such that the molar ratio of the reactive groups of the cross-linking agent to that of component B is 0.6-1.5, and 40-60% by weight of an organic solvent for component B, the boiling point thereof being 140.degree.-310.degree. C. The invention also relates to a process for coating a metal surface using said coating composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.