Back to results
US 12,480,009 B2Granted
Nanoporous cerium oxide nanoparticle macro-structure
AssigneeXheme Inc.
InventorSiva Sai Ramana Kumar Challa
Life of this patent
Estimating the term…
Abstract
The present invention is directed to a nanoporous cerium oxide nanoparticle (NCeONP) macro-structure containing a plurality of the cerium oxide nanoparticles which define a plurality of macro-structure pores. The NCeONP macro structure may be used to improve pigment and/or dye performance.
Claims11
Nanoporous cerium oxide nanoparticle macro-structure comprising:
- a plurality of cerium oxide nanoparticles present as a macro-structure having a binary size distribution of:
- (1) a macro-structure diameter in the range of 10 nm to 300 nm and a macro-structure pore diameter in the range of 5 nm to 30 nm;
- and
- (2) a macro-structure diameter in the range of 5,000 nm to 30,000 nm and a macro-structure pore diameter in the range of 900 nm to 1100 nm.
1 more element
A formulation comprising:
- a plurality of cerium oxide nanoparticles having a diameter in the range of 10 nm to 100 nm present as a macro-structure in combination with a pigment or dye, wherein said macro-structure has macro-structure diameter in the range of 50 nm to 30,000 nm and macro-structure pore diameter in the range of 10 nm to 1100 nm.
A method for improving the color stability of a pigment or dye on or within a given substrate, comprising:
- supplying nanoporous cerium oxide nanoparticle macro-structure (NCeONP) comprising a plurality of cerium oxide nanoparticles having a diameter in the range of 10 nm to 100 nm present as a macro-structure having macro-structure diameter in the range of 50 nm to 30,000 nm and macro-structure pore diameter in the range of 10 nm to 1100 nm;
- and
- applying said nanoporous cerium oxide nanoparticle macro-structure to a surface of said substrate.
Dependencies are inferred from the claim text.