Back to results
US 5,626,907 AGranted
Process for coating metal surfaces with a fluororesin using a primer
AssigneeE. I. DuPont de Nemours and Company
InventorsMinori Hagiwara, Kenji Kiwa, Tatsuya Ogita, Luc G. P. J. D'Haenens
Life of this patent
Estimating the term…
Abstract
A process for coating a metal surface with a fluororesin, using a primer comprising fluororesin, aluminum flake and more polyether sulfone than polyamideimides.
Claims12
A process for coating a metal surface with a fluororesin comprising applying to said metal surface a primer composition comprising a solution or a dispersion in an organic solvent, of a polyether sulfone, a fluorinated resin, at least one polymer selected from the group consisting of a polyamideimide, and a polyimide, and a particulate metal, in which the proportion of the polyether sulfone:
- one or both of polyamideimide and polyimide is from 55:45 to 95:5 and the ratio of the total polyether sulfone and one or both of polyamideimide and polyimide to the fluororesin is 20:80 to 70:30 by weight, and;
- applying the fluororesin to the resultant primed layer as a powder coating.
Dependencies are inferred from the claim text.