C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/00 (2006.01) C09D 5/08 (2006.01) C10M 111/04 (2006.01) C10M 169/02 (2006.01) C10M 169/04 (2006.01) C10M 173/02 (2006.01)
Patent
CA 2363081
A metal substrate is provided with a coating that (i) provides substantial corrosion resistance, (ii) makes it possible to shape the substrate by roll forming and similar light cold forming operations without the need for any oil or wax lubricant, and (iii) has good adhesion to subsequently applied paint. This is achieved by coating the metal substrate surface with an aqueous liquid composition that contains acrylate polymer resin, wax, and hexavalent chromium and then drying this coating into place on the surface to produce the desired dry coating.
La présente invention a pour objet un substrat métallique recouvert d'un revêtement qui : i) procure une haute résistance à la corrosion; ii) permet de modeler le substrat lors d'opérations de profilage et de formage à froid analogues sans nécessiter l'utilisation d'huile ou de cire lubrifiante; iii) a une bonne adhérence avec une peinture appliquée ultérieurement. Ceci est obtenu en revêtant la surface du substrat métallique avec une composition liquide aqueuse contenant de la résine de polyacrylate, de la cire et du chrome hexavalent. Ce revêtement est ensuite séché directement sur la surface de manière à former le revêtement sec souhaité.
Bershas James P.
Engel Christopher A.
Goodreau Bruce H.
Miller Robert W.
Murphy Michael A.
Henkel Corporation
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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