Process, dispersions and use
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United States of America Patent
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Apr 28, 2015
Grant Date -
Jul 21, 2011
app pub date -
Oct 1, 2009
filing date -
Oct 2, 2008
priority date (Note) -
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Abstract
A process for preparing an aqueous pigment dispersion suitable for use in an ink jet printing ink comprising the following steps in the order I) followed by II):
- I) providing a dispersion having a sodium chloride critical coagulation concentration of no more than 2.0M, said dispersion comprising a pigment, an aqueous liquid medium and a dispersant having one or more ionic group(s); andII) reducing the hydrophilicity of the dispersant by reacting at least some, but not all of the ionic group(s) in the dispersant with the one or more hydrophobic compound(s).
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International Classification(s)
- C08G:MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN B....
- C08F:MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONL....
- C09D:COATING COMPOSITIONS, e.g. PAINTS, VARNISHES, LACQ....
- B01J:CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, CO....
- C09B:ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PROD....
- C08L:COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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