Mediator systems based on mixed metal complexes, used for reducing dyes
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United States of America Patent
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Sep 14, 2004
Grant Date -
May 15, 2003
app pub date -
Oct 15, 2002
filing date -
Mar 2, 2000
priority date (Note) -
Expired
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Abstract
Mediator systems obtainable by mixing a salt of an electrochemically active complexing metal (M1) capable of forming a plurality of valence states with a hydroxyl-containing complexing agent, which may likewise be present as salt, and with a salt of an electrochemically inactive complexing metal (M2) in an alkaline aqueous medium, wherefor the molar ratio of metal ion M2 to metal ion M1 is from 0.8:1 to 2:1 are useful for reducing dyes and dyeing cellulosic textile material.
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