Chemically aggregated kaolin clay pigment and process for making the same by phosphate bonding
US5584925A · kind A · utility
6Cited by
12References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1995 |
| Grant date | Dec 17, 1996 |
| Priority date | — |
| Expiry date | Jun 26, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/80
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An opacifying kaolin pigment with improved porosity, light scattering ability (opacity), gloss, and ink receptivity over that of the starting pigment is manufactured by a process which comprises the steps of treating an aqueous solution of kaolin with a phosphate compound, using the endogenous aluminum leached from kaolin and/or adding a soluble aluminum compound and increasing the pH of the mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.