Method for conditioning organic pigments
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United States of America Patent
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Jun 25, 2002
Grant Date -
Nov 22, 2001
app pub date -
Nov 22, 1999
filing date -
Nov 22, 1999
priority date (Note) -
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Abstract
This invention relates to a process for preparing conditioned organic pigments by (a) milling a mixture comprising: (1) one or more crude organic pigments; (2) at least about 0.1% by weight, relative to the organic pigment, of one or more acrylic copolymer dispersants; and (3) 0 to about 100 parts by weight, relative to the organic pigment, of a milling liquid in which the organic pigment is substantially insoluble; and (b) isolating the milled organic pigment.
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