Inorganic pigment compositions comprising surface-modified nanoparticles, and methods of making

摘要

Inorganic pigment compositions comprising surface-modified nanoparticles are described, along with methods of making such compositions. Such compositions may allow the inorganic pigment to be diluted to a significant extent with non-pigmented extenders, while preserving or enhancing the coloring power of the pigment.

主权项

1. A method of preparing a nanoparticle-enhanced inorganic pigment composition, comprising:
providing a plurality of inorganic pigment particles; mixing the plurality of inorganic pigment particles with a plurality of surface-modified nanoparticles so that the plurality of surface-modified nanoparticles forms at least a monolayer upon at least a portion of the surface of at least some of the inorganic pigment particles; and, further comprising a step of mixing the nanoparticle-enhanced inorganic pigment composition with an inorganic extender at at least a 2:1 weight ratio of extender to pigment to form an admixture.