Bleaching and dyeing; fluid treatment and chemical modification – Bleaching – Chemical
Patent
1994-07-18
1995-12-12
Albrecht, Dennis
Bleaching and dyeing; fluid treatment and chemical modification
Bleaching
Chemical
8137, 252102, 252104, 25217412, 25217417, 25218629, 25218633, 25218643, 252524, 252542, C11D 328, C11D 339, C11D 3395, C11D 3386
Patent
active
054745764
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a composition and a process for inhibiting dye transfer between fabrics during washing.
BACKGROUND OF THE INVENTION
One of the most persistent and troublesome problems arising during modern fabric laundering operations is the tendency of some colored fabrics to release dye into the laundering solutions. The dye is then transferred onto other fabrics being washed therewith.
One way of overcoming this problem would be to bleach the fugitive dyes washed out of dyed fabrics before they have the opportunity to become attached to other articles in the wash.
Suspended or solubilized dyes can to some degree be oxidized in solution by employing known bleaching agents.
GB 2 101 167 describes a stable liquid bleaching composition containing a hydrogen peroxide precursor which is activated to yield hydrogen peroxide on dilution.
However it is important at the same time not to bleach the dyes actually remaining on the fabrics, that is, not to cause color damage.
U.S. Pat. No. 4,077,768 describes a process for inhibiting dye transfer by the use of an oxidizing bleaching agent together with a catalytic compound such as iron porphins.
Copending EP Patent Application 91202655.6 filed Oct. 9, 1991, relates to dye transfer inhibiting compositions comprising an enzymatic system capable of generating hydrogen peroxide and porphin catalysts.
It has now been found that certain amine base catalyst stabilizers when added to said enzymatic dye transfer inhibiting compositions enhances the overall performance of said compositions. The addition of said catalyst stabilizers reduces the rate of self-destruction of the porphin catalyst resulting in improved through-the-wash stability of the porphin catalyst. Also, improved whiteness benefits are obtained in the presence of catalyst stabilizers, due to a substantial reduction in the amount of porphin catalyst deposited onto the fabrics. Furthermore, it has been found that said catalyst stabilizers accelerate the oxidation reactivity of the porphin catalyst thereby increasing the rate of the dye bleaching.
Accordingly, a dye transfer inhibiting composition is provided which exhibits optimum dye transfer inhibiting properties.
According to another embodiment, the invention provides an efficient process for laundering operations involving colored fabrics.
SUMMARY OF THE INVENTION
The present invention relates to inhibiting dye transfer compositions comprising: thereof; thereof; derivatives thereof; of the metallo catalyst.
According to another embodiment of this invention a process is also provided for laundering operations involving colored fabrics.
DETAILED DESCRIPTION OF THE INVENTION
The present invention provides a dye transfer inhibiting composition comprising: thereof; thereof; derivatives thereof; of the metallo catalyst.
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 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 al
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Fredj Adbennaceur
Labeque Regine
Thoen Christiaan A. J. K.
Albrecht Dennis
Jones Michael D.
Rasser Jacobus C.
The Procter & Gamble & Company
Yetter Jerry J.
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