Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1995-04-14
1998-04-14
Lilling, Herbert J.
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
435187, 435188, 510226, 510300, 510305, 510320, 510323, C11D 300, C11D 1706, C12N 996, C12N 998
Patent
active
057390916
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The present invention relates to novel enzyme granules, a process for their preparation and their use in detergent and cleaning agent compositions.
Enzymes are employed in numerous detergent compositions, for example for cleaning textiles or kitchen utensils, to increase the washing activity. Proteases, lipases, amylases or cellulases are the enzymes commonly employed in this context. The enzymes are added to pulverulent detergent formulations in the form of so-called enzyme granules, which comprise the enzyme or enzyme mixture in question together with a filler and if appropriate other granulating auxiliaries. Such enzyme granules are usually obtained by processing an enzyme concentrate with fillers and binders and if appropriate also other granulating auxiliaries to a composition and granulating the composition. The resulting granule particles are then dried and, if appropriate, coated with a protective coating, and can then be employed in pulverulent detergent formulations.
There continues to be a need for enzyme granules which have an improved storage stability, especially in the presence of customary detergent constituents, and good solution properties.
There was thus the object of providing novel enzyme granules which have a high storage stability and good solution properties and which are particularly suitable for use in pulverulent detergent formulations.
Enzyme granules which display the required properties have now been found.
The invention thus relates to enzyme granules comprising an enzyme or enzyme mixture, a water-insoluble filler mixture, water-soluble filler mixtures, binders and, if appropriate, other granulating auxiliaries, the granules comprising a formate of an alkali metal or alkaline earth metal and if appropriate reducing sugars.
The storage stability of the enzymes processed in the granules according to the invention is increased in a surprising manner by addition of formate of an alkali metal or alkaline earth metal, it being possible for the stabilizing action of the formate of an alkali metal or alkaline earth metal to be increased still further in a synergistic manner, if desired, by addition of reducing sugars. The formate of an alkali metal or alkaline earth metal is therefore preferably always employed in the granules according to the invention in combination with reducing sugars.
The amount of formate of an alkali metal or alkaline earth metal in the enzyme granules according to the invention should preferably be 0.5 to 15% by weight, preferably 1 to 8% by weight, based on the total solids content. Alkaline earth metal formates here can either be added as such or be formed in situ from an alkali metal formate, in particular sodium formate, and a water-soluble alkaline earth metal salt, in particular a calcium salt. Calcium formate is particularly preferably employed in the stated amounts in the enzyme granules according to the invention.
If reducing sugars are to be used, where appropriate, for synergistic intensification of the stabilizing action of the formate of an alkali metal or alkaline earth metal employed in the enzyme granules according to the invention, reducing sugars which are advantageously employed are monosaccharides, such as glucose, or disaccharides, such as lactose and/or maltose, or polysaccharides, such as dextrins. Mixtures of reducing sugars, such as, for example, glucose syrup, are also suitable. Disaccharides, in particular lactose and/or maltose, are preferably used in the enzyme granules according to the invention. The abovementioned reducing sugars are advantageously employed in the enzyme granules according to the invention in an amount of 0.5 to 20% by weight, in particular 2.0 to 10.0% by weight, based on the total solids content.
The enzyme granules according to the invention can comprise, as enzymes, all the enzymes customary in detergent and cleaning agent compositions, for example enzymes such as proteases, lipases, amylases, glucanases, such as cellulases, hemicellulases or pullulanases, or oxidoreductases, preferably amylase
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Herrmann Hubert A.
Kiesser Torsten W.
Konieczny-Janda Gerhard
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