Method for forming double-layer coatings, method for forming multilayer coatings, and multilayer coatings
AssigneeNippon Paint Co., Ltd.
InventorsHiroyuki Sakamoto, Sho Takeshita, Ichiro Kawakami, Satoru Uchidoi, Takao Saito
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Abstract
A method for forming double-layer coatings excellent in smoothness and resistant to yellowing is provided which comprises electrodepositing a cationic electrodeposition coating composition to form an uncured cationically electrodeposited coating, applying an intermediate coating composition to said uncured coating to form an uncured intermediate coating, and heating both uncured coatings simultaneously, said cationic electrodeposition coating composition containing a sulfonium group- and propargyl group-containing resin composition.
Claims10
A method for forming double-layer coatings, which comprises electrodepositing a cationic electrodeposition coating composition to form an uncured cationically electrodeposited coating, applying an intermediate coating composition to said uncured coating to form an uncured intermediate coating, and heating both uncured coatings simultaneously,
- said cationic electrodeposition coating composition containing a sulfonium group- and propargyl group-containing resin composition,
- wherein a curing temperature of the intermediate coating composition minus a curing temperature of the cationic electrodeposition coating composition is −35° C. to −10° C.
Dependencies are inferred from the claim text.