Methods of forming composite coatings

Details Methods of forming composite coatings Methods of forming composite coatings

B - Operations, Transporting

05

D

B05D 1/12 (2006.01) B05D 1/38 (2006.01) B05D 3/02 (2006.01)

Patent

CA 2598998

A method of forming a composite coating is provided including (a) applying a first powder base coating to a substrate; and (b) either (1) applying a second powder base coating comprising flake or platelet effect pigment and heating the first and second base coats to substantially level the second base coat and allow migration of the effect pigment to a surface region thereof but not sufficient to cause the second base coat to cure; and (2) applying a top coating and substantially curing the resultant composite coating; or alternatively, (3) heating the first base coat to form a generally continuous film; (4) applying the second powder base coating comprising the effect pigment and heating the second base coat to substantially level the second base coat and allow migration of the effect pigment to a surface region thereof; and (5) applying the top coating and substantially curing the resultant composite coating.

L'invention concerne un procédé pour former des revêtements composites qui consiste en ce qui suit: (a) appliquer un premier revêtement de base en poudre à un substrat et; (b) soit (1) appliquer un deuxième revêtement de base en poudre comprenant un pigment à effet de flocons ou de plaquettes et réchauffer les premier et deuxième revêtements de base en poudre pour égaliser sensiblement le deuxième revêtement de base et permettre la migration du pigment d'effet vers sa région de surface mais à un degré insuffisant pour provoquer le durcissement du deuxième revêtement de base soit, en variante, (3) réchauffer le premier revêtement de base de manière à former un film généralement continu; (4) appliquer le revêtement de base pour égaliser sensiblement le deuxième revêtement de base et permettre la migration du pigment d'effet vers sa région de surface; et (5) appliquer le revêtement supérieur et faire durcir sensiblement le revêtement composite ainsi obtenu.

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