Detergents containing enzymes and bleach activators

Details Detergents containing enzymes and bleach activators Detergents containing enzymes and bleach activators

2000-03-31

2002-05-21

Boyer, Charles (Department: 1751)

Cleaning compositions for solid surfaces, auxiliary compositions

Cleaning compositions or processes of preparing

For cleaning a specific substrate or removing a specific...

C510S276000, C510S286000, C510S300000, C510S302000, C510S305000, C510S310000, C510S314000, C510S320000, C510S400000, C510S517000, C510S518000, C510S528000

Reexamination Certificate

active

06391838

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to enzyme-containing detergents which, besides typical ingredients, contain a certain bleach activator from the group of cationic nitrites.
2. Discussion of Related Art
Besides the ingredients essential to the washing process, such as surfactants and builders, detergents generally contain other ingredients which may be collectively referred to as washing aids and which comprise such different groups of ingredients as foam regulators, redeposition inhibitors, bleaching agents and dye transfer inhibitors. The washing aids in question also include substances which support cleaning performance through the enzymatic degradation of soils present on the fabric. The same also applies to detergents for cleaning hard surfaces. Besides the proteases which assist in removing proteins and the lipolytic lipases, particular significance attaches to the amylases, of which the function is to facilitate the removal of starch-containing soils through the catalytic hydrolysis of the starch polysaccharide, and to the cellulases. Cellulases have been known for some time as softeners for cotton fabrics by virtue of their ability to degrade cellulose. So far as the relevant action mechanism is concerned, it is assumed that fabric-softening cellulases preferentially hydrolyze and remove microfibrous cellulose, so-called fibrils, which projects from the surface of the cotton fibers and prevents them from sliding freely over one another. In addition, a side effect of this degradation of fibrils is the strengthening of the visual color impression.
Other typical ingredients of detergents are active substances which are intended to improve the bleaching performance of the peroxygen bleaching agent normally present in such compositions. Thus, inorganic peroxygen compounds, more particularly hydrogen peroxide and solid peroxygen compounds, which dissolve in water and release hydrogen peroxide in the process, such as sodium perborate and sodium carbonate perhydrate, have long been used as oxidizing agents for disinfecting and bleaching purposes. The oxidizing effect of these substances in dilute solutions depends to a large extent on the temperature. For example, with H
2
O
2
or perborate in alkaline bleaching liquors, soiled textiles are only bleached sufficiently quickly at temperatures above about 60° C. At lower temperatures, the oxidizing effect of the inorganic peroxygen compounds can be improved by the addition of so-called bleach activators, for which numerous proposals have become known in the literature, above all from the classes of N- or O-acyl compounds, for example polyacylated alkylene-diamines, more especially tetraacetyl ethylenediamine, acylated glycol urils, more especially tetraacetyl glycol uril, N-acylated hydantoins, hydrazides, triazoles, hydrotriazines, urazoles, diketopiperazines, sulfuryl amides and cyanurates, also carboxylic anhydrides, more especially phthalic anhydride, carboxylic acid esters, more especially sodium nonanoyloxybenzenesulfonate, sodium isononanoyloxybenzenesulfonate, and acylated sugar derivatives, such as pentaacetyl glucose. By adding these substances, the bleaching effect of aqueous peroxide liquors can be increased to such an extent that substantially the same effects are obtained at temperatures of only around 60° C. as are obtained with the peroxide liquor alone at 95° C.
Detergents containing a naturally occurring &agr;-amylase and a bleach-activating agent of the acetonitrile derivative type are known from hitherto unpublished German patent application DE 198 24 687.
It has surprisingly been found that the combination of certain bleach-activating agents of the acetonitrile derivative type with enzymes leads to unexpected synergistic improvements in performance when it is used in detergents.
DESCRIPTION OF THE INVENTION
The present invention relates to a bleach-containing detergent which contains a compound corresponding to general formula I:
in which R
1
represents —H, —CH
3
, a C
2-24
alkyl or alkenyl group, a substituted C
2-24
alkyl or alkenyl group with at least one substituent from the group consisting of —Cl, —Br, —OH, —NH
2
, —CN, an alkyl or alkenyl aryl group containing a C
1-24
alkyl group or a substituted alkyl or alkenyl aryl group containing a C
1-24
alkyl group and at least one other substituent at the aromatic ring, R
2
ad R
3
independently of one another are selected from —CH
2
—CN, —CH
3
, —CH
2
—CH
3
, —CH
2
—CH
2
—CH
3
, —CH(CH
3
)—CH
3
, —CH
2
—OH, —CH
2
—CH
2
—OH, —CH(OH)—CH
3
, —CH
2
—CH
2
—CH
2
—OH, —CH
2
—CH(OH)—CH
3
, —CH(OH)—CH
2
—CH
3
, —(CH
2
CH
2
—O)
n
H where n=1, 2, 3, 4, 5 or 6 and X is an anion, and an enzyme selected from the group consisting of protease, amylase, lipase, cellulase and mixtures thereof besides typical detergent ingredients compatible with such components.
The present invention also relates to the use of a combination of acetonitrile derivative corresponding to formula (I) and an enzyme selected from the group consisting of protease, amylase, lipase, cellulase and mixtures thereof, for increasing the cleaning performance of detergents, more particularly against protein-containing, starch-containing and/or colored, more particularly tea-based, soils, where they are used in detergent solutions, particularly aqueous detergent solutions, containing a peroxygen compound. Cleaning performance against colored soils is meant to be interpreted in the broadest sense and encompasses both the bleaching of soil present on the fabric, the bleaching of soil present in the wash liquor after separation from the fabric and the oxidative destruction of textile dyes present in the wash liquor—having separated from textiles under the washing conditions—before they can attach themselves to differently colored fabrics. The cleaning performance of cleaning solutions for hard surfaces is also understood to encompass both the bleaching of soil present on the hard surface, more particularly tea, and the bleaching of soil present in the dishwashing liquor after separation from the hard surface.
Compounds corresponding to formula I may be produced by known methods as published in the patent literature cited above or, for example, by Abraham in Progr. Phys. Org. Chem. 11 (1974), pages 1 et seq. and by Arnett in J. Am. Chem. Soc. 102 (1980), pages 5892 et seq., or by similar methods.
Compounds corresponding to formula (I) in which R
1
, R
2
and R
3
are the same are preferably used. Of these compounds, those in which the substituents mentioned represent methyl groups are preferred.
The anions X include in particular the halides, such as chloride, fluoride, iodide and bromide, nitrate, hydroxide, hexafluorophosphate, sulfate, hydrogen sulfate, metho- and ethosulfate, chlorate, perchlorate, and the anions of carboxylic acids, such as formate, acetate, benzoate or citrate. Compounds corresponding to formula I, in which X is chloride, sulfate, hydrogen sulfate or methosulfate, are preferably used.
An acetonitrile derivative corresponding to formula I is present in detergents according to the invention in quantities of preferably 1 to 10% by weight and more preferably 2 to 7% by weight.
A detergent according to the invention preferably contains 0.001 mg to 0.5 mg and, more particularly, 0.02 mg to 0.3 mg of enzymatically active protein per gram of the detergent as a whole. The protein concentration may be determined by known methods, for example by the bicinchonic acid process (BCA process, Pierce Chemical Co., Rockford, Ill.) or by the biuret process (A. G. Gornall, C. S. Bardawill and M. M. David, J. Biol. Chem. 177, 751-766, 1948).
Proteases which may be used in accordance with the invention include the enzymes obtainable from microorganisms, more especially bacteria or fungi, with an optimum pH in the alkaline range, for example the proteases known from International patent applications WO 92/07067, WO 91/02792, WO 88/03947 and WO 88/03946 and from European patent applications EP 471 265, EP 416 967 and EP 394 352. Protease is preferably used i

Affiliated with

Also associated with

Rating

Detergents containing enzymes and bleach activators does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Detergents containing enzymes and bleach activators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detergents containing enzymes and bleach activators will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2916447