Aluminiumhydroxide-containing composite pigments and method for production
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United States of America Patent
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May 26, 2020
Grant Date -
Sep 15, 2016
app pub date -
Mar 10, 2016
filing date -
Mar 10, 2015
priority date (Note) -
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Abstract
The invention relates to the manufacture of composite pigments containing aluminum hydroxide, and their use for improving the pigment light-scattering efficiency in coatings, plastics, paper and laminates. The composite pigment particles contain pigment particles such as titanium dioxide and precipitated aluminum hydroxide and are manufactured by in-situ precipitation of aluminum hydroxide in an aqueous pigment particle suspension. Use of the composite pigment particles according to the invention, based on titanium dioxide, permits savings on pigment with little or no loss of optical properties. Alternatively, if the pigment content remains unchanged, it is also possible to achieve better optical properties.
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