Process for producing resin-coated pigment, resin-coated pigment, aqueous pigment dispersion and aqueous colorant composition containing the same
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United States of America Patent
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Oct 13, 2015
Grant Date -
Oct 23, 2008
app pub date -
May 25, 2005
filing date -
May 26, 2004
priority date (Note) -
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Abstract
A process for producing a resin-coated pigment capable of providing an ink and a paint being superior in dispersion stability of a pigment and having rapid drying property, high gloss and density without containing those such as an organic solvent and a salt that cause the lowering of performance of pigment dispersion, characterized in that a pigment is dispersed in an aqueous solution in which an anionic group-containing resin is dissolved in the presence of a basic compound and then, the anionic group-containing resin is precipitated on the surface of the pigment by removing the basic compound in the aqueous solution, using an ion exchange means.
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