Process for improving hiding efficiency in pigmented paints
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United States of America Patent
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Dec 13, 2016
Grant Date -
Jan 22, 2015
app pub date -
Jul 5, 2011
filing date -
Jul 5, 2011
priority date (Note) -
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Abstract
The present invention relates to a process comprising the steps of a) contacting an aqueous dispersion of a TiO2 slurry containing adsorbing dispersant with an adsorbing latex to form a mixture, wherein the pH of the mixture of the TiO2 slurry and adsorbing latex are sufficiently high to inhibit interaction between the TiO2 and the adsorbing latex; then b) lowering the pH of the mixture of step a) sufficiently to promote interaction between the TiO2 and the adsorbing latex, thereby forming a composite. The process of the present invention provides for improved hiding and reduced grit for coatings compositions.
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