US 12,116,486 B2
Coated pigment
Futa Hayashi, Osaka (JP); Masami Sato, Osaka (JP); and Katsura Kawashima, Osaka (JP)
Assigned to Toyo Aluminium Kabushiki Kaisha, Osaka (JP)
Filed by Toyo Aluminium Kabushiki Kaisha, Osaka (JP)
Filed on Mar. 9, 2021, as Appl. No. 17/195,933.
Application 17/195,933 is a continuation of application No. 16/496,682, abandoned, previously published as PCT/JP2018/011546, filed on Mar. 22, 2018.
Claims priority of application No. 2017-073272 (JP), filed on Mar. 31, 2017.
Prior Publication US 2021/0189143 A1, Jun. 24, 2021
Int. Cl. B22F 1/14 (2022.01); B22F 1/16 (2022.01); C08K 3/08 (2006.01); C08K 3/10 (2018.01); C08K 3/22 (2006.01); C08K 9/02 (2006.01); C08K 9/06 (2006.01); C08K 9/08 (2006.01); C08L 57/00 (2006.01); C08L 87/00 (2006.01); C09C 1/62 (2006.01); C09C 1/64 (2006.01); C09C 3/12 (2006.01); C09D 5/02 (2006.01); C09D 5/29 (2006.01); C09D 7/62 (2018.01); C09D 7/63 (2018.01); C09D 17/00 (2006.01); C22C 1/04 (2023.01); C23C 18/12 (2006.01); C08K 3/36 (2006.01); C08K 5/5415 (2006.01)
CPC C09C 1/62 (2013.01) [B22F 1/14 (2022.01); B22F 1/16 (2022.01); C08K 3/08 (2013.01); C08K 3/10 (2013.01); C08K 3/22 (2013.01); C08K 9/02 (2013.01); C08K 9/06 (2013.01); C08K 9/08 (2013.01); C08L 57/00 (2013.01); C08L 87/00 (2013.01); C09C 1/64 (2013.01); C09C 1/642 (2013.01); C09C 1/648 (2013.01); C09C 3/12 (2013.01); C09D 5/028 (2013.01); C09D 5/29 (2013.01); C09D 7/62 (2018.01); C09D 7/63 (2018.01); C09D 17/006 (2013.01); C22C 1/0416 (2013.01); C23C 18/1216 (2013.01); C23C 18/122 (2013.01); C01P 2004/03 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C08K 2003/0812 (2013.01); C08K 2003/2227 (2013.01); C08K 3/36 (2013.01); C08K 5/5415 (2013.01)] 10 Claims
 
1. A method for manufacturing a coated pigment,
(1) the method comprising a step in which an organic silicon compound is hydrolyzed in a liquid mixture containing (a) a flake-shaped metal particle, (b) a silicon-containing raw material including at least one kind of the organic silicon compound and (c) a solvent to thereby form a silicon compound-containing layer on the surface of the metal particle, and
(2) at least the step is performed under stirring with a stirring blade so that the stirring Reynolds number Re=(ρ×n×d2)/μ, in which ρ is the density (kg/m3) of the liquid mixture at 25° C., n is the stirring rotation (rps), d is the impeller span (blade diameter) (m), and μ is the viscosity of the liquid mixture at 25° C., is at least 10,000.