Easily flushable transparent, strong diarylide yellow pigment compositions
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United States of America Patent
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Jul 14, 1987
Grant Date -
N/A
app pub date -
Apr 12, 1985
filing date -
Apr 12, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Diarylide yellow pigment compositions which are sulfonated with 2,2'disulfobenzidine and/or p-sulfo-acetoacetanilide are rendered hydrophobic by treatment with specific quaternary ammonium salts. The pigment compositions are easily flushed into flushed bases. When incorporated into printing inks, the pigments demonstrate improved color strength and transparency.
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