C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 133/10 (2006.01) B05D 7/00 (2006.01) C09D 133/06 (2006.01) C08L 61/32 (2006.01)
Patent
CA 2062302
An improved process for forming a multilayer finish on a substrate by applying a layer of a waterborne basecoating composition to the substrate; at least partially drying the coating, applying a layer of a solvent based high solids clear coating to the basecoating and curing the coatings; the improvement that is used therewith is as follows: A. a waterborne basecoating composition that has a film forming binder of an acrylic polymer neutralized with ammonia, a primary amine or a secondary amine without the presence of a tertiary amine a water dispersible or water dilutable alkylated melamine formaldehyde resin and the composition contains pigments in a pigment to binder weight ratio of about 0.5/100 to 200/100; B. a high solids solvent based clear coating composition having a film forming binder of an acrylic polymer, a polyester or a polyesterurethane and an alkylated melamine formaldehyde crosslinking agent and about 0.1-5% by weight, based an the weight of the binder, of a strong acid catalyst; wherein the basecoating composition and the and the clear coating composition are cured at about 100-180°C to form a glossy wrinkle free finish having an automotive quality appearance.
Bennett Jones Llp
E. I. Du Pont de Nemours And Company
LandOfFree
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