Modified pigments and methods for making and using the same
US7927416B2 · kind B2 · utility
3Cited by
839References
35Claims
0Family size
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Key dates
| Filing date | Oct 31, 2007 |
| Grant date | Apr 19, 2011 |
| Priority date | — |
| Expiry date | Oct 31, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K9/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of producing a modified pigment by sulfonating a pigment and subsequently oxidizing the pigment. The modified pigment may have sulfonic acid and carboxyl surface modifying groups attached to the surface of the pigment. Charge balancing counterions such as alkali metals, alkaline earth metals and NR1R2R3H+, where R1, R2 and R3 are independently H or C1-C5 alkyl groups, may be associated with the surface modifying groups. The modified pigment is combined with water to produce a dispersion that can be used in such applications as coatings, paints, papers, adhesives, latexes, toners, textiles, fibers, plastics and inks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.