US 11,655,374 B2
Method for manufacturing a special effect pigment using an emulsion
Kangning Liang, Santa Rosa, CA (US)
Assigned to VIAVI SOLUTIONS INC., Chandler, AZ (US)
Filed by VIAVI SOLUTIONS INC., San Jose, CA (US)
Filed on Apr. 12, 2019, as Appl. No. 16/383,056.
Prior Publication US 2020/0325342 A1, Oct. 15, 2020
Int. Cl. C09C 1/00 (2006.01); B05D 5/06 (2006.01); B05D 1/38 (2006.01); B05D 3/06 (2006.01); B05D 3/02 (2006.01); C08K 5/06 (2006.01); C08K 5/07 (2006.01); C08K 5/45 (2006.01); C08K 5/14 (2006.01); C08K 5/23 (2006.01); C08K 3/30 (2006.01); C09C 3/10 (2006.01)
CPC C09C 1/0021 (2013.01) [B05D 1/38 (2013.01); B05D 3/0254 (2013.01); B05D 3/067 (2013.01); B05D 5/068 (2013.01); C08K 3/30 (2013.01); C08K 5/06 (2013.01); C08K 5/07 (2013.01); C08K 5/14 (2013.01); C08K 5/23 (2013.01); C08K 5/45 (2013.01); C09C 3/10 (2013.01); B05D 2202/25 (2013.01); B05D 2202/30 (2013.01); B05D 2202/45 (2013.01); B05D 2401/10 (2013.01); B05D 2401/30 (2013.01); B05D 2502/00 (2013.01); B05D 2503/00 (2013.01); B05D 2504/00 (2013.01); B05D 2506/00 (2013.01); B05D 2518/10 (2013.01); C08K 2003/3045 (2013.01)] 15 Claims
 
1. A method of making pigments, comprising:
forming a first slurry including a substrate, a colorant, a polymer precursor, and a radical initiator, wherein the substrate is a single layer of a reflector material chosen from a metal or a metal alloy;
forming a solution including an emulsifier;
combining the first slurry and the solution so that the substrate is encapsulated by a first coating, wherein the first coating is a colored polymer coating;
forming a second slurry including the substrate encapsulated by the first coating, a second polymer precursor, and a second radical initiator;
forming a second solution including a second emulsifier; and
combining the second slurry and the second solution so that the substrate encapsulated by the first coating is further encapsulated by a second coating.