Detergent compositions inhibiting dye transfer in washing

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a dye transfer inhibiting composition comprising: A.
a metallo catalyst selected from a) metallo porphin and water-soluble or water-dispersable derivatives thereof; b) metallo porphyrin and water-soluble or water-dispersable derivatives thereof; c) metallo phthalocyanine and water-soluble or water-dispersable derivatives thereof; B.
an enzyme oxidation scavenger.
C.
an enzymatic system capable of generating hydrogen peroxide.
The Hydrogen Peroxide Precursor The oxidizing agent, hydrogen peroxide is generated in situ by using an enzymatic hydrogen peroxide generation system.
The use of an enzymatic hydrogen peroxide generating system allows the continuous generation of low levels of hydrogen peroxide and provides a practical way of controlling a low steady-state level of hydrogen peroxide.
Maximum effectiveness occurs when the component levels are such that the hydrogen peroxide is replenished at a rate similar to its removal due to the oxidation of dyes in the wash water.
The enzyme used in the present invention is an oxidase.
The oxidase is present by 0.
1-20000 units, preferably 0.
5 to 5000 units per gram of the composition.
One unit is the amount of enzyme needed to convert 1 .
mu.
mol of substrate per minute.
Suitable oxidases are urate oxidase, galactose oxidase, alcohol oxidases, amine oxidases, amino acid oxidases, cholesterol oxidase and glucose oxidase, malate oxidase, glycollate oxidase, hexose oxidase, aryl alcohol oxidase, L-gulonolactose oxidase, pyranose oxidase, L-sorbose oxidase, pyridoxine 4-oxidase, 2-2-hydroxyacid oxidase, choline oxidase, ecdysone oxidase.
The preferred enzymatic systems are alcohol and aldehyde oxidases, glucose oxidase.
The more preferred systems for granular detergent application would have solid alcohols, e.
g.
glucose whose oxidation is catalyzed by glucose oxidase to glucoronic acid with the formation of hydrogen peroxide.
The more preferred systems for liquid detergent application would involve liquid alcohols which could for example, also act as solvents