Pigment compositions for inks with improved rheology
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United States of America Patent
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May 25, 2010
Grant Date -
Nov 6, 2008
app pub date -
Mar 30, 2005
filing date -
Apr 6, 2004
priority date (Note) -
Expired
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Abstract
A process for the preparation of pigment compositions which give improved ink flow is provided which comprises treating the pigment, during the pigment synthesis, with a small amount of a long chain aliphatic amine. The pigment compositions obtained can be used for preparing millbase inks which due to their improved flow viscosity (rheology) at high pigmentation can be easily handled as well as flexibly formulated, e.g. a number of final printing inks for different ink applications can be manufactured from a single millbase in a very economical manner. The final inks are preferably used in packaging gravure printing processes.
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