JPS59187099A - Enzyme-containing liquid detergent composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to liquid detergent compositions, and more particularly to liquid detergent compositions containing enzymes that are stabilized against enzyme deactivation.

It has been well known that fats, proteins, and enzymes such as digestive enzymes are excellent detergent aids, and various laundry detergent compositions containing these enzymes have been widely used. The most important issue in enzyme-containing detergent compositions is to prevent the enzymes from deactivating during storage. Many proposals have been made for additives.

Although these proposals give mostly satisfactory results in the case of granular detergent compositions in which the active ingredients are present in the form of solid particles during storage, they may not dissolve or cause problems in the aqueous medium. In the case of liquid detergent compositions that exist in a cloudy state, satisfactory results have not yet been obtained.

Therefore, an object of the present invention is to provide an enzyme-containing liquid detergent composition that is stabilized against enzyme deactivation even during long-term storage and that can stably provide excellent detergency.

Another object of the present invention is to provide a liquid detergent composition in which the above-mentioned improvements are made without compromising its stability as a liquid.

According to the invention, (A) a planar active agent, CB) a builder consisting of a combination of alkanolamines and common salt, <C)
Provided is a liquid detergent composition that is stabilized with a 1-to-1 ratio against enzyme deactivation, characterized in that it contains a solvent and stabilizer selected from the group consisting of ethanol and polyhydric alcohols, and (CD) a detergent enzyme. be done.

The present invention provides a liquid detergent composition containing a surfactant and a detergent enzyme, and a combination of a detergent builder, an alkanolamine, and salt (sodium chloride) and a solvent. Adding alcohol to the liquid detergent can improve its transparency, solubility, and dispersion stability.
This is based on the knowledge that a stable liquid detergent that is stabilized against enzyme deactivation and has significantly improved detergency can be obtained.

Unlike granular detergents, liquid detergent compositions are required to have liquid transparency and solubility and dispersion stability during storage, so they have the special problem of not being able to incorporate a large amount of detergent builder into the composition. be. From this point of view, organic builders such as alkali metal salts of ethylenediaminetetraacetic acid and nitrile triacetate, as well as relatively small amounts of carbonates, phosphates, and sulfates, have conventionally been used as compounds that have relatively large effects as builders when mixed in small amounts. Inorganic building blocks such as builder have been used, but when detergent enzymes are added to liquid detergent compositions containing such builders, the enzymes are deactivated within a relatively short period of time, and the detergency is no longer as good as it was immediately after production. In contrast, there is a drawback that the level after storage drops to a significantly lower level.

According to the present invention, by using a combination of alkanolamines and salt as a detergent builder for enzyme-containing liquid detergents, it is possible to obtain enzyme deactivation resistance and increase detergency, and in addition, ethanol etc. By blending the above solvent and stabilizer, the anti-deactivation stability and detergency can be further improved.

In the liquid detergent composition of the present invention, the combination of alkanolamine and common salt used as a builder exists stably dissolved in an aqueous medium together with other ingredients, and has various effects as a builder and at the same time prevents enzyme deactivation. It is especially suitable for the purpose of the present invention in that it has a stabilizing effect over a long period of time. Further, a solvent/stabilizing agent such as ethanol also acts to improve the compatibility of various compounded ingredients and also to stabilize the enzyme.

In the present invention, the blending ratio of the various components mentioned above can be varied within a fairly wide range, but the surfactant may be mixed in a range of 1 to 50%.
% by weight, especially 10 to 40% by weight, alkanolamines 0.5 to 10% by weight, especially 6 to 5% by weight, salt 0.1 to 10% by weight, especially 3 to 5% by weight, solvent and 1 to 20% by weight, especially 5 to 10% by weight of stabilizer
Particularly good results are obtained for the purposes of the invention when residual quantities of and water are used.

As the surfactant, any nonionic, anionic or amphoteric surfactant conventionally used in liquid detergents may be used alone or in combination of two or more.

Surfactants particularly suitable for the purpose of the present invention are those mainly composed of nonionic surfactants and containing small amounts of anionic and/or amphoteric surfactants. Suitable examples of suitable surfactants include, but are not limited to: System activator or alkylolamide 9 system? Lingual salience is advantageously used. 75, in which any known per se is used as the anionic interfacial property Qi 11;
Alkyl sulfate, alkyl benzene sulfonate, alkaline earth metal salt such as kylethoxy sulfate, amine salt such as ethanolamine salt, etc. It is used for the activation of betaine type or imidan 1) 3q, etc.

As alkanolamines, mono-, di- or triethanolamines, particularly monoethanolamines, are preferred, but also mono-, di- or tri-fluorophylamines,
Mono, di or 1/IJ isobu 17 noku no nogemin,
It is also possible to use N-methyl jetanolamine, N-propyl jetanolamine, etc.

In the present invention, it is important to use common salt among various inorganic salts, and when using sodium carbonate, sodium sesquicarbonate, mirabilite, and various phosphates, it is important to improve the dissolution stability and loss resistance of the liquid. The activity stability tends to be lower than that of the present invention.

As detergent enzymes, any enzymes known to easily decompose dirt and stains on textiles during washing can be used, including enzymes that are particularly active in alkaline regions, such as proteolytic enzymes. etc. are advantageously used.

Ethanol or polyhydric alcohol is used as the solvent/stabilizer (1). In addition to glycerin, partially etherified glycerin, ethylene glycol, globylene glycol, diethylene glycol, triethylene glycol, etc. are used as the polyhydric alcohol. used. Suitable examples of partially etherified glycerin are mono-methyl, ethyl, propyl, inglovil, butyl ether of glycerin and diglycerin. In addition to the above-mentioned essential ingredients, the enzyme-containing liquid detergent composition of the invention contains Any additives known per se, such as dyes, fluorescent brighteners, fragrances, thickeners, may be incorporated according to formulations known per se.

The invention is illustrated by the following example.

Example 1 Using Esperase (brown liquid) manufactured by Novo, which is an alkali protease, a liquid detergent composition having the formulation shown in Table 1 below was prepared and tested for the following items. (1) Sustainability of enzyme activity After filling bottles with the various detergents shown in Table 1 and sealing them,
For esperase-containing detergents, the enzyme activity was measured by the DMS method after being left in an atmosphere of 7C for each number of days. ) Washing liquids with a detergent concentration of 0.67 t/l were prepared using the detergent immediately after the detergent power adjustment and the detergent after each number of days had passed in (1) above.

Use Terori o-0-io-0-1ty as a cleaning machine 1-1 Protein-contaminated cloth Oleic acid 28.6, Squalane 2.5) Lyolein 15.6, Cholesterol 1.6
, cholesterol oleate 12.2, gelatin ZO1
Flowing rose 2.5, broiled carbon 0.2, test dust 11
Seed 29B, dirt: 1, water: 20), rotation speed 1Q
Washing was performed under the conditions of QrP, washing temperature 40C, washing time 10 minutes, and detergency was determined. The cleaning power was determined by determining the optical reflectance of the cloth before and after washing, and calculating the cleaning power using the following formula.

(3) Transparency and Stability Test After leaving various detergents at a low temperature of -15 tr for a number of days, the state of the liquid was observed with the naked eye and expressed in the following evaluation.

5: The liquid is clear and no precipitate is observed even after being left standing.

4: The liquid is slightly opaque even after being left to stand, or a very small amount of precipitate is formed when left to stand.

6: A product that causes a considerable amount of sediment R when left to stand 0 2: A product that already causes some opacity or precipitation when preparing a liquid detergent.

1: A liquid detergent that is already markedly opaque or precipitated during its preparation.

The results obtained are shown in Tables 2, 6 and 4.

Table 1 Table 6 Table 4 From the results in Tables 2.6 and 4 mentioned above, by using a combination of alkanolamine and salt as the bilgu, excellent enzyme activity and liquid stability can be obtained. Furthermore, it can be seen that these properties are further improved by incorporating a stabilizer/solvent such as a glycerin derivative.

In addition, Esperase 3. used in this example. (:1 (manufactured by Novo) is 8.65 KNPU”/f/ (Ki lo N
ov.

proteina,,pe Uni lx per G
ram) enzyme activity was used.

Claims (2)

[Claims] (1) An enzyme depletion method characterized by containing a builder consisting of a combination of a surfactant, alkanolamines and common salt, a solvent/stabilizer selected from the group consisting of ethanol and polyhydric alcohol, and a detergent enzyme. A liquid detergent composition stabilized against oxidation. (2) Surfactant: 1 to 50 weight parts, alkanolamine: 0.5 to 10 weight parts, salt: 0, 1 to 10 weight parts, solvent/stabilizer: 1 to 20 weight parts, detergent enzyme: 0.
01 to about 1 fold f! % and the balance amount of water.