Black pearlescent pigment with a metal layer

Abstract

A pearlescent effect pigment having an opaque, dark or black color is disclosed. The black pearlescent pigment includes a platelet-shaped non-metal substrate, optionally an oxide layer, a template layer, and a metal layer. The pearlescent luster of the disclosed effect pigment is comparable to those of pure pearlescent effects. The disclosed method provides a cost-effective approach for the manufacturing of the disclosed effect pigment.

1 . A method of producing the coated pigment comprising a substrate, the substrate being non-metal; a template layer, the template layer being an organic monolayer or an organic polymer layer; and a metal layer; the method comprising:
 forming a catalyst layer in-situ on the surface of the substrate; and   depositing the metal layer on the catalyst layer.   
     
     
         2 . The method of  claim 1 , wherein depositing the metal layer includes depositing a metal onto the surface of the substrate with electroless deposition. 
     
     
         3 . The method of  claim 1 , wherein forming the catalyst layer and depositing the metal layer are a one-step reaction.