Compositions comprising fine sedimentary kaolin and methods for preparing same
US8465583B2 · kind B2 · utility
1Cited by
42References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2011 |
| Grant date | Jun 18, 2013 |
| Priority date | — |
| Expiry date | Dec 21, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/5445
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed herein are kaolin compositions, such as beneficiated fine sedimentary kaolin compositions. The beneficiated fine sedimentary kaolins may be obtained from the upper bed of the Rio Capim Kaolin deposit. The compositions may have at least one property chosen from a low iron content and low Hinckley crystallinity index, such as Fe2O3 in an amount less than about 0.8% by weight relative to the total weight of the solids content and wherein the Hinckley crystallinity index of the kaolin is less than about 0.5. Also disclosed are products obtained therefrom, such as paint and paper coating compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.