Process for producing dispersion of surface-treated carbon black powder, and process for producing surface-treated carbon black powder
US8728432B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 2010 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | May 21, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09C1/50
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of producing a surface-treated carbon black powder dispersion includes subjecting carbon black fine particles having a volume average particle size of 100 nm to 20 μm to wet granulation and drying by heating to obtain granulated carbon black having a hardness of 12 cN or less and a pH of less than 7, grinding the granulated carbon black to obtain a ground product having a volume average particle size of 20 nm to 20 μm, and subjecting the ground product to wet oxidization in an aqueous medium. The resulting surface-treated carbon black powder dispersion exhibits excellent print density, print quality, discharge stability, and storage stability when used as an inkjet printer aqueous black ink.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.