Dispersant compositions improving the heat stability of transparent pigments
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United States of America Patent
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Oct 29, 2002
Grant Date -
Feb 14, 2002
app pub date -
Jul 27, 2001
filing date -
Jul 31, 2000
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Abstract
The present invention relates to compositions comprising a sulfonated diketopyrrolopyrrole and a Mannich-type substituted dihydroquinacridone to produce colored materials having improved stability at high temperatures. The instant compositions can be used for pigmenting polymeric materials, such as color filters.
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