Highly dispersible fine powder of alkaline earth metal carbonate
US8304074B2 · kind B2 · utility
1Cited by
5References
7Claims
0Family size
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Key dates
| Filing date | Mar 12, 2008 |
| Grant date | Nov 6, 2012 |
| Priority date | — |
| Expiry date | Oct 9, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A fine powder of an alkaline earth metal carbonate selected from the group consisting of barium carbonate, strontium carbonate and calcium carbonate, in which a primary particle of the powder has a mean diameter of 30 to 90 nm, in which the mean diameter is measured on a circle obtained from a projected area of the primary particle, and in which an accumulated volume of micropores having a pore size in the range of 10 to 20 nm is not less than 5×10−2 cm3/g can be easily dispersed in an aqueous medium in the form of essentially primary particles by an industrially employable dispersing method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.