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US 9,067,782 B2Granted
Inorganic pigment compositions comprising surface-modified nanoparticles, and methods of making
Assignee3M Innovative Properties Company
InventorsJimmie R. Baran, Madeline P. Shinbach, Haeen Sykora
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Abstract
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.
Claims17
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.
1 more element
A nanoparticle-enhanced inorganic pigment composition, comprising:
- a plurality of inorganic pigment particles;
- a plurality of surface-modified nanoparticles forming 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 plurality of extender particles present at least at a 2:1 weight ratio of extender to pigment so that the composition is present as an admixture.
1 more element
Dependencies are inferred from the claim text.