JPS61293299A - Oxygen-containing bleaching 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 [Industrial Application Field] The present invention relates to a bleach composition, and more particularly to a bleach composition containing a proteolytic enzyme and whose enzyme activity hardly changes over time.

[Conventional technology and problems]

At present, many oxygen-based bleaches containing sodium percarbonate as a main component have been developed, and recently attempts have been made to mix enzymes with this sodium percarbonate to clean protein stains and the like. However, simply mixing a proteolytic enzyme into the oxidizing agent, sodium percarbonate, causes a significant decrease in enzyme activity, making it extremely impractical. Therefore, a method has recently been adopted in which granules of this proteolytic enzyme coated with cellulose derivatives, inorganic salts, etc. are blended with soda percarbonate. However, it is impossible to completely coat the enzyme, and the coating layer reacts with sodium percarbonate and is easily broken.

As a method to overcome this drawback, that is, to improve the storage stability of enzymes, Japanese Patent Application Laid-Open No. 58-21498 proposes a method of stirring and mixing a mixture of a nonionic activator and an amphoteric activator. ing. However, although this method improves the storage stability of the enzyme, the use of an amphoteric activator poses a new problem of inhibition of enzyme activity.

[Means for solving problems]

As a result of extensive studies, the present inventors have found that a combination of proteolytic enzyme granules with a specific particle size distribution and specific polyoxyethylene alkyl ether or polyoxyethylene alkylphenyl ether as a surfactant can be used in combination. It was discovered that when mixed with soda carbonate, an excellent bleach composition without the above-mentioned drawbacks and without classifiability (non-uniformity of performance within the product, especially above and below) can be obtained without using an amphoteric activator, The invention has been completed.

That is, in the present invention, soda percarbonate, 350μ or less is 10
A bleach composition containing a proteolytic enzyme granule having a particle size distribution of 1000μ or more and 10% by weight or less, and a polyoxyethylene alkyl ether or polyoxyethylene alkyl phenyl ether with a pour point of 25°C or less. It provides:

Sodium percarbonate (a) used in the present invention is a hydrogen peroxide adduct of soda carbonate, and is generally 2Na, CO3.
It has a composition of 3 Hz (h). This sodium percarbonate is used alone or, if necessary, together with, for example, an extender or a binder, in the form of granules with a particle size of 100 meshes to 5 meshes.

The amount of sodium percarbonate is 60 to 95% by weight. The proteolytic enzyme granules (b) used in the present invention include:
For example, alkaline protease is mentioned.

Specific examples of commercially available enzyme products and their manufacturers include "Alcalase", "Esperase", "Savinase" (Industrie GmbH, Novo, Copenhagen, Denmark); -v company), [Protease B-400J, "Protease B-4000J,"
Protease ^p” and [Protease AplOOJ
(A-G Co., Ltd., Ferment, Schweitzelisoche, Basel, Switzerland), rGRD Protease (Company Co., Ltd., Monsando, St. Louis, Missouri, USA), and rAPI-21J (Showa Denko Co., Ltd.).

Furthermore, the proteolytic enzyme granules used are limited to those having a particle size distribution of 10% by weight of 350μ or less and 10% by weight or less of 10ooμ or more. Those containing 10% by weight or more of enzyme granules with a particle size of 350μ or less have a significant decrease in enzyme activity, and those containing 10% by weight or more of enzyme granules with a particle size of 1000μ or more have significant classification, making them suitable for bleach compositions. Not suitable as an enzyme. The amount of enzyme is preferably 0.1 to 10% by weight.

Polyoxyethylene alkyl ether and polyoxyethylene alkyl phenyl ether (c
) has a pour point of 25°C or lower. Pour point is 25℃
This is because as a result of extensive studies, it has become clear that if the pour point is below 25°C, it will have a stabilizing effect on enzyme activity, and if it has a pour point higher than 25°C, it will not have a stabilizing effect.

The polyoxyethylene alkyl ether has an alkyl group or alkenyl group having an average carbon number of 10 to 18, and 1
Polyoxyethylene alkylphenyl ethers have an alkyl group with an average carbon number of 6 to 12 and contain 1 to 20 moles of ethylene oxide. Examples of additives include those with a pour point of 25°C or lower. The blending amount of polyoxyethylene alkylphenyl ether or polyoxyethylene alkyl ether is 0.
It is 1 to 10% by weight.

In the present invention, it is desirable that no surfactant other than the above-mentioned component (c) be contained. That is, other surfactants may inhibit enzyme activity.

Furthermore, in the present invention, in addition to the above three components, 0.5 to 5% by weight of an alkaline earth metal sulfate, such as magnesium sulfate or calcium sulfate, is added to stabilize the enzyme activity. It can be further improved.

In addition to the above-mentioned components, the enzyme-containing bleach composition of the present invention may optionally contain known bleach components as required. Namely, inorganic and organic building blocks such as sodium tripolyphosphate, sodium carbonate, sodium pyrophosphate, sodium sulfate, sodium borate, sodium bicarbonate, sodium silicate, sodium nitrilotriacetate, sodium ethylenediaminetetraacetate, carboxymethyl cellulose, and polyvinyl alcohol. , polyethylene glycol, sodium polyacrylate, hydrolyzate of vinyl acetate and maleic anhydride copolymer, etc., perfumes, pigments, fluorescent dyes, activators, and the like.

Moreover, these can also be used together with a cleaning composition.

〔Example〕

The present invention will be explained below with reference to Examples. Inventive products 1 to 5 and comparative products A to Summer having the compositions shown in Table 1 were prepared, and the following tests were conducted. The results are also shown in Table 1.

Each test was conducted as follows.

(11 Classification Evaluation Method) Place 250 g of the sample in a cylindrical container with a diameter of 5 cIm and a height of 13 C1l, and use a shaker (shaking width IC11, rotation speed I
After shaking the cylinder for 1 minute at QOOrpm), remove 10 g of sample from the bottom and bottom of the cylindrical container at the top of the 10 value, and measure the enzyme activity.

One enzyme activity (smaller activity) was rated O (usable) when it was 60% or more of the other enzyme activity, and × when it was less than 60% of the other enzyme activity.

(2) Method for evaluating storage stability The sample was stored in a constant temperature bath at 50° C. for 14 days, the amount of effective oxygen in the sodium percarbonate before and after storage was measured, and the residual rate of effective oxygen was calculated using the following formula.

(3) Method for evaluating storage stability of enzyme The sample was stored in a constant temperature bath at 50°C for 14 days, the enzyme activity was measured before and after storage, and the residual rate of enzyme activity was calculated using the following formula.

(4) Method for evaluating bleaching effect 10g of sample stored in a constant temperature bath at 50°C for 14 days was heated to 40°C.
, 21 water and immediately prepared for the bleaching test using tea-stained cloth (prepared by the following preparation method) and EMPA for the cleaning test.
llh 112 (cocoa stained standard soiled cloth) is soaked for 30 minutes.

Using the reflectance changes of 460 voices at this time, the bleaching rate (%) and cleaning rate (%) were calculated using the following formula.

Bleaching rate of black tea contaminated cloth: EMP＾ Cleaning rate of contaminated cloth: (Black tea contaminated cloth) Boil 80g of Nitto black tea (yellow package) in 31 ion exchange water for about 15 minutes, strain it with a desized dry cotton cloth, Soak cotton gold cloth #2003 in the liquid and boil for about 15 minutes.

The specimen was removed from the heat, allowed to stand for about 2 hours, then air-dried, washed with water until the washing solution became colorless, dehydrated, and pressed to form a test piece of 10 cm x 10 cm, which was used for experiments.

〔Effect of the invention〕

As is clear from the results in Table 1, the enzyme-containing bleach composition of the present invention not only has excellent enzyme storage stability and enzyme activity, but also provides a uniform product without classifiability. .

Claims (1)

[Claims] 1. (a) 60-95% by weight of sodium percarbonate, (b) 35% by weight
0.1 to 10% by weight of a proteolytic enzyme granule having a particle size distribution of 10% by weight or less of 0μ or less and 10% by weight or less of 1000μ or more, and (c)
An enzyme-containing bleach containing 0.1 to 10% by weight of polyoxyethylene alkyl ether or polyoxyethylene alkyl phenyl ether having a pour point of 25°C or less, and containing no surfactant other than component (c). agent composition. 2, (a) Sodium percarbonate 60-95% by weight, (b) 35
0.1 to 10% by weight of a proteolytic enzyme granule having a particle size distribution of 10% by weight or less of 0μ or less and 10% by weight or less of 1000μ or more, and (c)
Contains 0.1 to 10% by weight of polyoxyethylene alkyl ether or polyoxyethylene alkylphenyl ether having a pour point of 25°C or less (d) 0.5 to 5% by weight of alkaline earth metal sulfate; (c) An enzyme-containing bleach composition characterized in that it does not contain any surfactant other than the ingredients.