Liquid dispersed dye of the azo or anthraquinone type
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United States of America Patent
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May 23, 2000
Grant Date -
N/A
app pub date -
Apr 13, 1998
filing date -
Apr 13, 1998
priority date (Note) -
Expired
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Abstract
A liquid dispersed dye of the azo or anthraquinone type that includes a dispersing agent and dispersing assistant in order to keep the dye dissolved in liquid without sedimentation. The preferred dispersing agent is a sulfonated lignin salt and the preferred dispersing assistant is a surfactant such as polyethylene glycol epoxide ether (EO-1), polyethylene glycol phenolic-formaldehyde epoxide ether (EO-2), or polyethylene glycol amino methylene epoxide ether (EO-3).
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