Preparation of nondusting free-flowing pigment concentrates
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United States of America Patent
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Jun 1, 2004
Grant Date -
Oct 31, 2002
app pub date -
Dec 5, 2001
filing date -
Dec 7, 2000
priority date (Note) -
Expired
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Abstract
The invention relates to a process for preparing nondusting free-flowing pigment concentrates with removal of the water from pigment suspensions comprising polymers and dispersants in a fluidized bed drier. The resulting bead-form pigment concentrates are nondusting and readily free-flowing. The invention further embraces the use of pigment concentrates prepared in this way for coloring plastics and polymers.
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