Pigment dispersion
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jun 14, 2016
Grant Date -
Dec 4, 2008
app pub date -
Nov 7, 2007
filing date -
Nov 9, 2006
priority date (Note) -
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Abstract
The invention relates to a method of producing a substantially aqueous pigment dispersion substantially free from an organic binder comprising mixing at least one water-soluble or water-dispersible silane compound and colloidal silica particles to form silanized colloidal silica particles in an aqueous dispersion whereby said at least one silane compound is mixed with colloidal silica particles in a weight ratio of silane to silica of from about 0.2 to about 1.5, mixing said silanized colloidal silica particles with an organic and/or inorganic pigment, wherein the weight ratio of silica to pigment is from about 0.001 to about 0.8 to form said substantially aqueous pigment dispersion. The invention also relates to an aqueous pigment dispersion obtained from the method defined herein.
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