Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Enzyme component of specific activity or source
Patent
1998-06-29
2000-02-29
Gupta, Yogendra
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Enzyme component of specific activity or source
510276, 510284, 510300, 510321, 510337, 510349, 510360, 510393, 510405, 510446, 510475, 510515, 510527, 510530, 510531, 134 42, C11D 742, C11D 3386, C12S 1100, D06L 337
Patent
active
060309334
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to detergent compositions comprising an enzyme which is immobilized on an activated polymer.
BACKGROUND OF THE INVENTION
Over the years, a number of enzyme products have been developed for incorporation into detergents. Unfortunately, many commercially prepared enzyme-based products have certain drawbacks. Enzyme-based products are often difficult to handle, may cause an irritating dust, may be incompatible with other detergent ingredients, and may deteriorate in the presence of moisture. In addition, it is well known in the art that enzyme deactivation occurs in aqueous detergent compositions containing enzymes.
Consequently, there is a standing desire to prepare enzyme products suitable for detergents which overcome the above drawbacks.
It has now been found that one or more enzymes immobilized on an activated polymer are very suitable for incorporation into detergent compositions. The inclusion of such immobilized enzymes in a detergent composition provide an improved thermal stability, especially in liquid detergents. In addition, an improved resistance of said immobilized enzymes occurs against premature proteolysis due to protease. Furthermore, a better controlled enzymatic activity on fabrics can be achieved using said immobilized enzymes on an activated polymer in detergents.
In addition, it has been surprisingly found that utilization of said immobilized enzymes in detergents also delivers an important whiteness maintenance and a reduced potential to generate improved odor characteristics.
It is known in the art that enzymes can be attached to polymers. In Applied Microbiology and Biotechnology (1985), 21:37-41 is disclosed the immobilization of Aspergillus niger cellulase on cyanogen bromide activated dextran of varying molecular weights. In Enzyme Microb. Technology, 1983, Vol 5, 342-344 is disclosed the immobilization of three cellulase components of Penicillium funiculosum on a soluble, high molecular weight polymer (polyvinyl alcohol), using carbodiimide. In Prikladnaya Biokhimiya i Mikrobiologiya, Vol 14, No. 5, pp703-708 is described the covalent immobilization of lipase and amylase on soluble and insoluble copolymers of N-vinylpyrrolidone with glycidyl acrylate and glycidyl methacrylate. In the Japanese patent application J06240297 of Toray Industries is disclosed a cleaning agent containing enzymes immobilized on water-soluble organic high molecular weight polymers. The agent is prepared by mixing the enzymes and a polymer, preferably a methyl vinyl ether-maleic anhydride copolymer. Using this method the enzyme loosely immobilized on the polymer can easily be washed/rinsed away from the polymer.
However, nowhere is disclosed the benefit of using enzymes immobilized via a covalent binding on activated polymeric supports in detergent compositions.
SUMMARY OF THE INVENTION
The current invention relates to detergent compositions comprising one or more enzymes which are immobilized by a covalent binding on an activated polymeric support. Preferably the polymeric support is polyethylene glycol.
DETAILED DESCRIPTION OF THE INVENTION
An essential component of the detergent compositions of the invention is that one or more enzymes are immobilized on an activated polymer. The immobilization is achieved by a covalent binding of said enzyme(s) to the carrier.
The immobilization of one or more enzymes on activated polymers compatible with detergents and especially with liquid detergent matrices surprisingly offers the following advantages: detergent; proteolysis due to protease, and especially in liquid detergents; rinse-away. Hence better whiteness maintenance; reduced potential to generate fabric malodor due to enzymatic activity (e.g. lipase on perspiration) and due to microbial growth on fabrics; fabrics. It should be noted, however, strength loss of fabric is also an unavoidable result of mechanical action due to use/wearing and may further result from damage by a bleaching component, especially if the fabric is contaminated by metall
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Baeck Andre Cesar
Herbots Ivan Maurice Alfons Jan
Jansen Madeleine Petronella
Wevers Jean
Cook C. Brant
Gupta Yogendra
McDow-Dunham Kelly L.
Mruk Brian P.
The Procter & Gamble & Company
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