Narrow size distribution ground calcium carbonate compositions
US6592837B2 · kind B2 · utility
29Cited by
20References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2001 |
| Grant date | Jul 15, 2003 |
| Priority date | — |
| Expiry date | Jul 6, 2021 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/675
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Ground calcium carbonate compositions having narrow particle size distributions and a method for producing the compositions. The method involves forming a substantially dispersant-free calcium carbonate suspension, wet-grinding the suspension, and aging the suspension. The method does not require the use of classification equipment and the aging process does not require heating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.