US 12,173,190 B2
Method for coating resin molded product
Masaya Minato, Hiroshima (JP); Hiroshi Kubota, Hiroshima (JP); Masaaki Akamine, Hiroshima (JP); Yushi Matsuda, Hiroshima (JP); Kazuhiro Furuta, Hiroshima (JP); Takahiro Tanaka, Hiroshima (JP); Akira Andou, Hiroshima (JP); and Tomohiro Nagano, Saitama (JP)
Assigned to MAZDA MOTOR CORPORATION, Hiroshima (JP)
Filed by MAZDA MOTOR CORPORATION, Hiroshima (JP)
Filed on Dec. 23, 2021, as Appl. No. 17/561,183.
Claims priority of application No. 2021-019116 (JP), filed on Feb. 9, 2021.
Prior Publication US 2022/0251402 A1, Aug. 11, 2022
Int. Cl. B05D 3/02 (2006.01); B05D 7/00 (2006.01); B05D 7/02 (2006.01); C08K 3/22 (2006.01); C08K 7/18 (2006.01); C09D 7/40 (2018.01); C09D 7/61 (2018.01); C09D 175/04 (2006.01)
CPC C09D 7/61 (2018.01) [B05D 3/02 (2013.01); B05D 7/02 (2013.01); B05D 7/546 (2013.01); C08K 3/22 (2013.01); C08K 7/18 (2013.01); C09D 7/69 (2018.01); C09D 7/70 (2018.01); C09D 175/04 (2013.01); B05D 2201/02 (2013.01); C08K 2003/2227 (2013.01); C08K 2201/003 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method of coating a resin molded product, the method comprising:
applying an undercoat material to the resin molded product to form an undercoat film;
curing the undercoat film;
applying a topcoat material to a surface of the undercoat film to form a topcoat film; and
thermally curing the topcoat film, wherein
a coating material that contains a base resin having a larger volume expansion coefficient than the resin molded product and a filler having a smaller volume expansion coefficient than the base resin is used as the undercoat material, the filler being a granular filler having a number-average particle size of 2 μm or more to 12 μm or less.