Dry grinding aid for dry milling a calcined kaolin clay and a related method
US5856397A · kind A · utility
13Cited by
9References
17Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 12, 1996 |
| Grant date | Jan 5, 1999 |
| Priority date | — |
| Expiry date | Nov 12, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C23/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved method for dry milling calcined kaolin clays involves use of an effective amount of an ammonium polyacrylate dry grinding aid which is applied to a calcined kaolin clay product prior to dry milling. This improves flowability of the product through the mill, resulting in an increase in the grinding efficiency and, therefore, an increase in the production rate of the mill. The final product displays an increase in Hercules high shear viscosity, and therefore, an increase in the rheology in very high solids aqueous slurries, which is particularly useful in the coating of paper and paperboard products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.