Composite pigments comprising titanium dioxide and carbonate and method for producing
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United States of America Patent
Stats
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Oct 14, 2014
Grant Date -
Jan 2, 2014
app pub date -
Jun 28, 2013
filing date -
Jun 28, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to the manufacture of pigment-containing composite pigment particles containing titanium dioxide pigment particles and at least one inorganic and/or organic filler as extender, as well as calcium carbonate that is precipitated in the process, and their use for improving the pigment light-scattering efficiency in coatings, plastics and laminates. The extender is preferably selected from Ca-, Ca—Mg- and Mg-carbonates, natural and synthetic silicon dioxide and oxides and are manufactured in a combined process of precipitation and dispersion. Depending on the combination selected, the use of composite pigment particles according to the invention permits pigment savings with little or no loss of optical properties. Alternatively, if the pigment content remains unchanged, it is possible to achieve better values, e.g. for tinting strength. Particularly, a part or the whole TiO2 quantity in the user system can be replaced by the composite pigment particles according to the invention.
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Cited Art Landscape
Patent Citation Ranking
- 3 Citation Count
- C09D Class
- 12.11 % this patent is cited more than
- 11 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Apr 14, 2026 |
