Process for forming composite coated film
First Claim
1. A process for forming a composite coated film, which comprises coating a cationically electrodepositing paint film on the surface of a substrate, said electrodepositing paint being composed mainly of a cationic resin having a functional group capable of reacting with isocyanate groups and substantially free from a crosslinking agent, then coating an organic solvent-base paint containing a polyisocyanate compound having per molecule at least two isocyanate groups which is partly or fully blocked with a blocking agent capable of being dissociated at a temperature of not more than 130°
- C., said solvent-based paint being capable of forming a coated film having a static glass transition temperature of 0°
to -75°
C. on the surface of the coated electrodepositing paint film, and then coating a top coat paint thereupon.
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Accused Products
Abstract
A process for forming a composite coated film, which comprises coating a cationically electrodepositing paint composed mainly of a cationic resin having a functional group capable of reacting with isocyanate groups on the surface of a substrate, then coating an organic solvent-base paint containing a polyisocyanate compound and capable of forming a coated film having a static glass transition temperature of 0° to -75° C. on the surface of the electrodeposited paint film, and then coating a top coat paint.
61 Citations
23 Claims
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1. A process for forming a composite coated film, which comprises coating a cationically electrodepositing paint film on the surface of a substrate, said electrodepositing paint being composed mainly of a cationic resin having a functional group capable of reacting with isocyanate groups and substantially free from a crosslinking agent, then coating an organic solvent-base paint containing a polyisocyanate compound having per molecule at least two isocyanate groups which is partly or fully blocked with a blocking agent capable of being dissociated at a temperature of not more than 130°
- C., said solvent-based paint being capable of forming a coated film having a static glass transition temperature of 0°
to -75°
C. on the surface of the coated electrodepositing paint film, and then coating a top coat paint thereupon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
- C., said solvent-based paint being capable of forming a coated film having a static glass transition temperature of 0°
Specification