Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2000-01-10
2001-03-20
Fries, Kery (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S320000, C510S226000, C510S397000, C510S393000, C510S530000, C510S130000, C510S137000
Reexamination Certificate
active
06204234
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to cleaning compositions, including laundry, dishwashing, hard surface cleaner, oral/dental cleaning compositions, comprising a proteinic substrate based oxygenase.
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.
Many consumer relevant stains contain proteinic components and are difficult to remove from the washed surfaces. Food stains originating from dairy products as such, like milk or egg, or processed within food or drink products, are particularly challenging to remove.
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. Moreover, body fluids stains, such as blood and menstrual fluids, are often difficult to remove effectively from a soiled item, especially when the stains have been ageing. 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, protease enzymes and/or high levels of bleaching compounds, optionally with bleach precursors and/or bleach enhancers, are incorporated in cleaning 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 proteic based stains and/or soils such as protein containing food stains/soils and everyday body 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 proteinic substrate based oxygenase.
It has been surprisingly found that an enzymatic bleach system based on a proteinic substrate based oxygenase 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 improved by the addition of another enzymatic bleach system, a conventional activated bleach system, a metallo catalyst based bleach system and/or another detergent enzyme, especially a protease.
In a preferred embodiment, the present invention relates to a laundry composition comprising a proteinic substrate based oxygenase, further providing fabric realistic items cleaning and whitening. In a second embodiment, the present invention relates to dishwashing or household cleaning compositions comprising a proteinic substrate based oxygenase and in a third embodiment, the present invention relates to oral/dental care compositions comprising a proteinic substrate based oxygenase.
The use of a proteinic substrate based oxygenase in a cleaning composition for substantive removal of proteic based stains/soils such as protein containing food stains/soils and everyday body soils and for sanitisation, has never been previously recognised. Nor have been recognised the substantive fabric realistic items cleaning and whitening performance when the proteinic substrate based oxygenase is used within a laundry detergent composition.
SUMMARY OF THE INVENTION
The present invention relates to cleaning compositions, including laundry, dishwashing, hard surface cleaner, oral/dental cleaning compositions, comprising a proteinic substrate based oxygenase, which provide effective and efficient cleaning of proteinic based stains and/or soils such as protein containing food stains/soils and/or everyday body soils and provide sanitisation of the treated surfaces.
Furthermore, the cleaning compositions of the present invention provide fabric realistic items cleaning and whitening performance when formulated as a laundry detergent composition.
DETAILED DESCRIPTION OF THE INVENTION
The essential component of the cleaning compositions of the present invention is a proteinic substrate based oxygenase. Preferably said enzyme is further characterised by being an iron sulphur or iron heme oxygenase and/or a heavy metal dependant oxygenase.
All oxygenases of the present invention will pass the following stain removal performance test achieved on standard test fabrics and being compared to a nil-oxygenase reference in same conditions.
The small scale test is done in a launderometer Washtec ROACHES equipped with stainless steel jars of 500 ml. The small scale test is done at 30-40° C. with total wash time of 30 minutes. Tests is done in a 1% detergent solution using the detergent as described in example 10, composition 5. The detergent is dissolved in 400 ml of water with a total hardness between 2.0-3.0 mmol Ca2+/L. The pH of the 1% detergent solution is adjusted with an acid (citric acid) or an alkali (NaOH) to pH 8-9. Each jar also contains 15 steel ball for better agitation. Standard stain test fabrics are supplied by wfk-Testgewebe Gmbh (Christenfeld,10-Brueggen, Germany). At least two replicates are run per test. The size of the stains is 3 cm×4 cm. The standard test fabric having the protein substrate are the wfk F1 OEM (eggyolk+milk stained cotton). The enzyme level in this small scale test is 1 mg enzyme protein/L. Levels of cofactor(s) when required are calculated according to the enzyme to cofactor(s) ratio known from literature.
For the reference treatment no enzyme or co-factor is added to the solution. In the test treatment the pre-weighted enzyme and cofactor is added to the solution and in a second test treatment only the co-factor is added to the solution. After that the test tracers are put in the jars. The launderometer is set on the required temperature. The launderometer is preheated to the right temperature before starting the test so the test is run at a constant temperature.
The jars are closed and put in the preheated launderometer. The cycle time is set and the test is started. After 30 minutes the test is stopped, the jars are taken out of the equipment and are opened. The standard test fabrics are taken out and rinsed 3 times in cold city water (hardness 2-3 mmole Ca2+/L). After rinsing the tracers are tumble dried in a normal household drier to completely dry.
The stain removal performance of the enzyme is analyzed by visual grading by an expert panel or preferentially by an instrumental stain removal measurement e.g. with the Spectraflash 500 apparatus from Datacolor. The Spectraflash 500 settings used for this test are:specular excluded, aperture 'small and U.V. filter FL40 (=UV cut off filter at 400 nm) and calibration is done versus a standard white and black.
The result expressed in color difference (Cielab) dE, is calculated between the test and reference treatment. Test 1 comprises the proteinic substrate based oxygenase of the present invention, test 2 comprises a monophenol monooxygenase of EC 1.14.18.1. The enzymes of the invention (Test 1) have a dE of 1 or more versus the monophenol monooxygenase (Test 2) tested in same conditions.
It has been found that the cleaning compositions of the present invention provide effective and efficient cleaning of proteinic based stains
Busch Alfred
Herbots Ivan Maurice Alfons Jan
Cook C. Brant
Fries Kery
Miller Steven W.
The Proctor & Gamble Company
Zerby Kim W.
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