Mediator systems based on mixed metal complexes, used for reducing dyes
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United States of America Patent
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Nov 9, 2004
Grant Date -
Jul 3, 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 one or more salts of a metal capable of forming a plurality of valence states with at least one amino-containing complexing agent (K1) and at least one hydroxyl-containing but amino-devoid complexing agent (K2) in an alkaline aqueous medium, wherefor the complexing agents may be present as salts and the molar ratio of K1 to metal ion is from 0.1:1 to 10:1 and the molar ratio of K2 to metal ion is from 0.1:1 to 5:1 are useful for dyeing cellulosic textile material.
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