Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1997-02-04
1999-01-12
Fries, Kery
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510229, 510230, 510392, 510320, 510321, 510305, 510316, 510396, 510330, C11D 3386, C11D 339, C11D 112, C11D 3395
Patent
active
058589465
DESCRIPTION:
BRIEF SUMMARY
This invention relates to detergent compositions, including dishwashing and laundry compositions, containing a lactase enzyme.
The overall performance of a detergent product, for use in washing or cleaning method, such as a laundry or dishwashing 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.
Food soils are often difficult to remove effectively from a soiled substrate. `Dried-on` and `baked-on` soils derived from milk-containing products are particularly challenging soils to remove. Specific examples of such soils would include combined milk/breakfast cereal soils, cheese soils and soils from sauces containing milk, including for example Bechemel sauce. The substrates can be fabrics, or hard surfaces such as chinaware, glassware, hollowware or ware made from plastic material.
Beta-D-galactosides, including for example lactose are found in milk-containing products. Lactase enzymes are commonly used in the milk products processing industry to catalyze the breakdown of the beta-D-galactosidic substances found in such products.
Specific benefits for the use of lactase enzymes in detergent formulations, particularly those designed for use in laundry, dishwashing and household cleaning operations have not however, been previously recognized.
The Applicants have now found that lactase enzymes may valuably be incorporated into detergent compositions. The inclusion of such enzymes provides stain/soil removal benefits. Removal of milk product soils, and in particular the removal of dried-on milk product soils is especially enabled.
The Applicants have also found that the inclusion of dispersants, particularly organic polymeric dispersants, is of great value in the detergent compositions. The disperants aid dispersion of the breakdown products of the enzymatic soil degradation, thus preventing their redeposition on articles in the wash.
It is an object of the present invention to provide detergent compositions containing a lactase enzyme, which provide soil/stain removal benefits, when used cleaning and washing operations.
It is a particular object of the present invention to provide laundry and dishwashing detergent compositions containing a lactase enzyme, which provide enhanced milk product soil/stain removal.
SUMMARY OF THE INVENTION
According to the present invention there is provided a detergent composition comprising at least one detergent component selected from a surfactant and a builder compound characterized in that said composition contains a lactase enzyme.
In a preferred aspect of the invention the detergent compositions also contain a dispersant, particularly an organic polymeric disperant compound.
An essential component of the detergent compositions of the invention is a lactase enzyme. The lactase enzyme is preferably incorporated into the compositions in accordance with the invention at a level of from 0.0001% to 2%, preferably from 0.0005% to 0.5%, more preferably from 0.001% to 0.05% active enzyme by weight of the composition.
By lactase enzyme it is meant herein an enzyme which acts to break down beta-D-galactosidic substances, including for example lactose, which is a common constituent of milk products. Specifically the lactase enzyme acts to catalyze the hydrolysis of a beta-D-galactoside into a D-galactose and an alcohol. Lactose hydrolysis results in formation of a galactose and glucose.
Lactase enzymes herein include naturally derived lactase enzymes and any variants obtained by, for example, genetic engineering techniques. Any such variants may be specifically designed with regard to the optimization of performance efficiency in the detergent compositions of the invention. For example, variants may be designed such that the stability of the enzyme to commonly encountered components of such compositions is increased. Alternatively, the variant may be designed such that the optimal pH or temperature performance range of-the enzyme
REFERENCES:
patent: 3635797 (1972-01-01), Battistoni et al.
patent: 3838007 (1974-09-01), van Velzen
patent: 4242219 (1980-12-01), Bogerman et al.
patent: 5318728 (1994-06-01), Surutzidis et al.
Foley Peter Robert
Jones Lynda Anne
Bolam Brian M.
Echler, Sr. Richard S.
Fries Kery
Procter & Gamble Company
Zerby Kim W.
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