Toning agent
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Apr 15, 2003
Grant Date -
N/A
app pub date -
Jun 16, 2000
filing date -
Oct 16, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A toning agent for an azo pigment, an azo pigment with a modified tone, and process for preparing the same are provide. 2-hydroxynaphthalene-3,6-dicarboxylic acid or a derivative thereof is admixed with a primary coupler component for an azo pigment and the mixed coupler composition and an aromatic diazonium are coupled.
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