Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Enzyme component of specific activity or source
Reexamination Certificate
2000-01-10
2002-12-10
Gupta, Yogendra N. (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Enzyme component of specific activity or source
C510S392000, C510S300000, C510S305000, C510S320000, C510S374000, C510S306000, C510S530000, C435S189000
Reexamination Certificate
active
06492316
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to cleaning compositions, including laundry, dishwashing, hard surface cleaner, oral/dental cleaning compositions, comprising a cytochrome enzyme.
BACKGROUND OF THE INVENTION
Performance of a cleaning product, for use in washing or cleaning method, is judged by a number of factors, including the ability to remove soils, and the ability to prevent the redeposition of the soils, or the breakdown products of the soils on the articles in the wash.
Coloured stains/soils are often difficult to remove effectively from a soiled item. Highly coloured stains and soils i.e. derived from fruit and/or vegetables are particularly challenging soils to remove. This stains and soils contain colour-bodies based on carotenoids compounds such as &agr;-, &bgr;- and &ggr;-carotene and lycopene and xanthophyls, on porphyrins such as chlorophyll and on flavonoid pigments and dye components. This latter group of natural flavonoid based dye components comprises the highly coloured anthocyanins dyes and pigments based on pelargonidin, cyanidin, delphidin and their methyl esters and the antoxanthins. These compounds are the origin of most of the orange, red, violet and blue colours occurring in fruits and are abundant in all berries, cherry, red and black currents, grapefruits, passion fruit, oranges, lemons, apples, pears, pommegranate, red cabbage, red beets and also flowers. Derivatives of cyanidin are present in up to 80% of the pigmented leaves, in up to 70% of fruits and in up to 50% of flowers. Specific examples of such soils would include tea, coffee, spices such as curry and paprika, orange, tomato, banana, tea, mango, broccoli, carrot, beetroot, spinach soils and grass. Ball pens' ink are also known to be highly difficult coloured stains to be removed.
In addition, the complex nature of everyday “body” soils typically found on pillow cases, T-shirts, collars and socks, provides a continuous thorough cleaning challenge for detergents. These soils are difficult to remove completely and often residues build up on fabric leading to dinginess and yellowing. Everyday body soils are also found on sanitary and kitchen surfaces such as bathtubs, toilet bowl and dishware.
The items can be fabrics, hard surfaces, dishware such as plasticware, glassware or chinaware, teeth and mouth.
Traditionally, high levels of bleaching compounds, optionally with bleach precursors and/or bleach enhancers, are incorporated in detergent compositions. Bleaching agents are compounds which are precursors of hydrogen peroxide which is formed in the course of the washing procedure. Perborates and percarbonates are the most important examples of such hydrogen peroxide precursors.
In view of the above, there exits clearly a continuous need to provide cleaning compositions which have an excellent detergency performance. Accordingly it is an object of the present invention to provide a cleaning composition which provides effective and efficient cleaning of coloured and/or everyday body stains and/or soils. It is a further object to provide a cleaning composition which provides fabric realistic items cleaning and whitening.
The above objective has been met by formulating cleaning compositions comprising a cytochrome, especially a cytochrome P450.
It has been surprisingly found that a cytochrome, especially a cytochrome P450, based enzymatic bleach system delivers in a cleaning composition, bleach-like benefits in an unexpected broad range of performance areas such as dingy cleaning, whiteness maintenance and stain removal. It has also been found that the cleaning compositions of the present invention provide sanitisation of the treated surfaces. It has been further found that the performance of the cleaning compositions of the present invention is enhanced by the addition of another enzymatic bleach system, a conventional activated bleach system, a metallo catalyst based bleach system and/or another detergent enzyme.
In a preferred embodiment, the present invention relates to a laundry and/or fabric care composition comprising a cytochrome, especially a cytochrome P450, further providing fabric realistic items cleaning and whitening. In a second embodiment, the present invention relates to dishwashing or household cleaning compositions comprising a cytochrome, especially a cytochrome P450 and in a third embodiment, the present invention relates to oral/dental care compositions comprising a cytochrome, especially a cytochrome P450.
Cytochrome enzymes have been extensively described in the art mainly in the medical context (U.S. Pat. No. 5,607,691, U.S. Pat. No. 5,604,198, RU2 063 758) and in biotechnological applications (J09 028 373, RU2 063 985). In particular, cytochrome P450 enzymes have been described for pharmaceutical applications such as in the recently published WO97/01349, WO96109042, WO96/04789 and WO95/34679. Cytochrome P450 are also used in analytical methods for testing cytotoxicity (U.S. Pat. No. 5,525,482), safety of a compound (J08056695) or identifying specific drugs (WO95/30766).
However, the use of cytochrome, especially cytochrome P450 in a cleaning composition, has never been previously recognised.
SUMMARY OF THE INVENTION
The present invention relates to cleaning compositions, including laundry, fabric care, dishwashing, hard surface cleaner, oral/dental cleaning compositions, comprising a cytochrome, especially a cytochrome P450. Said compositions provide effective and efficient cleaning of coloured and/or everyday body stains and/or soils and provide sanitisation of the treated surfaces. In particular, the composition of the present invention provides fabric realistic items cleaning and whitening when formulated as laundry detergent compositions.
DETAILED DESCRIPTION OF THE INVENTION
Essential components of the cleaning compositions of the present invention are a cytochrome, especially a cytochrome P450, and its electron transfer system. It has been found that the cleaning compositions of the present invention provide effective and efficient cleaning of coloured and everyday body stains and/or soils and in particular provide fabric realistic items cleaning and whitening when formulated as a laundry detergent composition.
Without wishing to be bound by theory, it is believed that “everyday body soils” contain sebum excreted by the human body. Sebum is believed to contain large quantities of saturated and unsaturated fatty acids, sterols and sterols esters (The physiology and Pathology of the skin, Vol. 9, A. Jarret, (1986)). The fragmentation of the substrate and the formation of ionizable groups or hydrophilic substituents by a cytochrome enzyme renders the enzymatic reaction products more soluble and hence easier to be removed from the soiled items.
Without wishing to be bound by theory, it is believed that the cytochromes can react with a broad range of organic compounds catalysing diverse reaction such as oxidative Carbon-Carbon bond cleavage; hydrocarbon hydroxylation; alkene epoxidation and oxygenation; arene epoxidation; N—,S— and O-dealkylations; N— and S-oxidation; oxidative and reductive dehalogenation; oxidations of alcohols and aldehydes; de-hydrogenation reactions; dehydration; reduction of N-oxides and epoxides and isomerisations.
Coloured plant and fruit stains contain highly coloured colour-bodies associated with cell wall constituents. These natural dye components are based on highly conjugated poly-aromatic compounds. It is believed that the colour of these materials fades upon oxidation by the cytochrome due to disruption of the colour-forming conjugated system in the compound.
In addition, the cleaning compositions of the present invention provide sanitisation of the treated surfaces.
Sanitisation includes all positive effects obtained by the inhibition or reduction of microbial activity on fabrics and other surfaces, such as the prevention of malodour development and bacterial/fungal growth. For example, it provides prevention of malodour development on stored and weared fabrics, on stored dishware, especially plastic kitchen gear
Busch Alfred
Herbots Ivan Maurice Alfons Jan
Elhilo Eisa
Gupta Yogendra N.
Miller Steve M.
Taffy Frank
The Procter & Gamble & Company
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