Nano particle mineral pigment
US8382016B2 · kind B2 · utility
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15References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2009 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | Nov 6, 2031 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H19/40
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Mineral pigments (such as kaolin clay) having a high surface area and particle size in the nano scale range are provided which are useful in paper coating and filling, ink jet coating formulations, paint compositions, and as a filler in rubbers, plastics and polymers. These pigments are manufactured by intensive wet milling of a mineral composition which may have undergone prior dry grinding and then optionally subjecting the wet milled mineral composition to an acid treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.