KR100429339B1 - Bleaching Composition - Google Patents

Abstract

The bleaching composition of the present invention is for bleaching and removing molds, and comprises (1) a peroxide capable of producing hydrogen peroxide in hydrogen peroxide or an aqueous solution, and (2) a dicyanamide or an alkali metal salt or an ammonium salt thereof, The pH of the mixed aqueous solution is adjusted to 7.5 or more by an alkali agent or an alkali builder.

Description

Bleaching Composition

Bleach and fungicide are divided into chlorine bleach and hydrogen peroxide bleach. Chlorine based on sodium hypochlorite is used for bleaching clothes and bleaching fungi on walls and furniture in homes because of its strong bleaching power. However, the chlorine system is excellent in bleaching power, but because it discolors clothes, it is unsuitable for color clothing, and it generates a peculiar smell due to molecular chlorine, which is discomfort to the user. have.

On the other hand, the hydrogen peroxide system has a wider range of use as a bleaching agent than a chlorine system, and the amount of the hydrogen peroxide system is increasing mainly in household use because there is no unpleasant odor.

However, peroxides alone have less bleaching power than chlorine bleaches. Thus, bleaching power by peroxide bleaching agents is insufficient to bleach garments at low temperatures, bleach walls and furniture in homes, walls and ceiling and tile connections in bathrooms, or molds in sinks.

Accordingly, it is possible to add an N-acyl compound such as tetraacetylethylenediamine (TAED) and tetraacetylglycoluril (TAGU), or glucose pentaacetate to a peroxide such as hydrogen peroxide, sodium carbonate-hydrogen peroxide adduct and sodium perborate- By using esters such as saccharose octaacetate in combination, bleaching power of peroxide has been improved. Various nitrile compounds have also been proposed as activating agents for improving the bleaching power of peroxides. For example, various nitriles are disclosed in British Patent No. 802,035, nodiacetonitrile is already contained in US Patent No. 3,882,035, and p-chlorobenzoyl dicyanamide is disclosed in Japanese Patent Laid-open Publication No. 52-52880 as a bleaching activator Has been proposed. However, even with the use of peroxide with these activators, the bleaching power is insufficient to bleach garments, fungi in the house. Furthermore, when it is used together with an acetylamide compound such as TAED or the like, which is commonly used, or an acetyl ester such as glucose pentaacetate, they react with hydrogen peroxide to generate peracetic acid, which causes a drawback that a specific odor is generated.

The present invention relates to a hydrogen peroxide bleaching composition having excellent bleaching power. The bleaching composition of the present invention is suitably used for cleaning, bleaching, sterilizing, deodorization and especially for removing molds and bleaching.

Accordingly, it is an object of the present invention to provide a bleaching composition having an excellent bleaching effect on clothes, an excellent bleaching power against fungi occurring in a wall or furniture of a residence, and a smell-free bleaching composition.

In order to achieve the above object, the bleaching composition of the present invention comprises (1) a peroxide which generates hydrogen peroxide in hydrogen peroxide and / or an aqueous solution, (2) dicyanamide and / or its alkali metal salt and / , And the pH of the mixed aqueous solution of (1) and (2) is 7.5 or more.

Another bleaching composition of the present invention comprises (1) a peroxide that produces hydrogen peroxide in hydrogen peroxide and / or an aqueous solution, (2) dicyanamide and / or its alkali metal salt and / or ammonium salt, and (3) Alkali builder, and the pH of the mixed aqueous solution of (1), (2) and (3) is 7.5 or more.

In the present invention, the hydrogen peroxide or hydrogen peroxide-producing peroxide used as the component (1) in the present invention includes commercially available aqueous hydrogen peroxide solution, a sodium carbonate-hydrogen peroxide adduct with a 2: 3 molar ratio of sodium carbonate and hydrogen peroxide, Sodium hydrate, and sodium perborate tetrahydrate.

The dicyanamide or an alkali metal salt thereof or an ammonium salt thereof (hereinafter referred to as " dicyanamide compound ") used as the component (2) in the present invention is used as a solid or alkaline aqueous solution, and as the alkali salt, .

Examples of the alkali or alkali builder of the component (3) include high molecular weight builders such as known alkali metal hydroxides, aminocarboxylic builders, oxycarboxylic builders, phosphonic acid builders, acrylate-vinylsulfonic acid salts, Based builder, a silicate-based builder, a borate-based builder, or a carbonate-based builder, and among these builders, a silicate-based builder is preferable.

The bleaching composition of the present invention may be used by sprinkling on a bleaching object each of (1) a peroxide generating hydrogen peroxide or hydrogen peroxide, (2) a dicyanamide compound, and (3) an alkaline agent or an alkaline builder, May be used together. In addition, peroxide which produces (1) hydrogen peroxide or hydrogen peroxide, (2) dicyanamide-based compound and (3) alkaline agent or alkali builder may be dissolved in water beforehand.

When the bleaching agent according to the present invention is used, it is preferable to use it as a pre-mixed aqueous solution in order to facilitate the bleaching operation. In that case, the hydrogen peroxide content is 0.5 to 60% by weight, preferably 0.5 to 10% by weight, more preferably 1 to 6% by weight. When the content is less than 0.5% by weight, bleaching power is insufficient, and when it is more than 60% by weight, handling of the bleach solution becomes difficult. The content of the dicyanamide-based compound is 0.2-30 wt%, preferably 0.5-10 wt%, more preferably 0.5-5 wt%. Then, an alkaline agent or an alkaline builder is added so that the pH of the mixed aqueous solution of (1) hydrogen peroxide and (2) cyanamide compound is in the range of 7.5 or more, preferably 9-13.

When the bleaching agent composition of the present invention is used as a composition for removing mold, it is preferable to use it as an aqueous solution preliminarily mixed to facilitate the work. However, it is also possible to prepare the components of the present invention separately or in combination, and to use them as an aqueous solution by dissolving them in water immediately before use.

The bleaching composition of the present invention may optionally contain known detergents or bleach components such as surfactants, organic or inorganic builders, alkalis, hydrotropes, solvents, fragrances, abrasives, hydrogen peroxide stabilizers and the like. When the viscosity of the bleach composition is raised to be used for ceiling, vertical surface, or inclined surface, a thickening agent may be added to prevent the composition from flowing down. Examples of the thickening agent include synthetic or semi- synthetic polymers such as acrylic derivative polymers and cellulose derivatives , Natural polymers such as xanthan gum and bee gum, and inorganic thickeners such as alumina sol.

The present invention will now be described in detail by way of illustrative examples and comparative examples, but should not be construed as limiting the invention.

The bleaching compositions of the present invention obtained in Examples and Comparative Examples were tested and evaluated in the following manner.

1. Bleaching test method and evaluation method

1) Standard contaminated cloth

Use the EMPA # 115 bleaching test cloth. The EMPA contaminated cloth is cut into a size of 10 cm × 10 cm and provided for the bleaching test.

2) Bleaching test method

20 g of the bleach composition is placed in a beaker, the EMPA contaminated cloth is immersed therein, and left for 10 minutes. Then remove the contaminated cloth and wash it thoroughly with tap water.

3) Evaluation method

The test pellet treated as described above is visually observed in the following four steps.

Bleaching IV: Almost bleached.

Bleaching degree III: slightly bleached.

Bleaching degree II: Almost no bleaching.

Bleaching I: No bleaching at all.

2. Test Method and Evaluation Method for Fungal Decontamination

1) Mold culture method

Steam sterilized agar medium is placed in a Petri dish. Inoculated with Aureo-basidium pullulans (IFO 6353, IAM F-24), the medium is incubated at 35 ° C for 30 days in an incubator.

2) Test methods for removing mold contamination

A glass tube of a predetermined length is put into an agar medium in which black mold grows, a bleaching composition is injected into the glass tube, and the mixture is allowed to stand for 30 minutes. Then, the degree of removal of black mold contamination is evaluated.

3) Evaluation method

The surface of the agar medium treated by the above method is visually observed in the following four steps.

Removal degree IV: Almost eliminated.

Removal degree III: slightly removed.

Removal degree Ⅱ: Almost eliminated.

Removal degree Ⅰ: It was not removed at all.

≪ Example 1-7 and Comparative Example 1-3 >

Hydrogen peroxide was added to water by the amount shown in Table 1, and the dicyanamide compound was dissolved in the water in the amount shown in Table 1. The pH of each of these solutions was adjusted to the values shown in Table 1 using sodium hydroxide to prepare a bleaching composition. These compositions were used to perform the bleaching test and the fungal decontamination test as described above, and the results are shown in Table 1.

[Table 1]

≪ Examples 10-18 and Comparative Example 4-6 >

Hydrogen peroxide was added to water by the amount shown in Table 2, and the dicyanamide-based compound was dissolved in the amount shown in Table 2 in this water. The pH of each of these solutions was adjusted to the values shown in Table 2 by using sodium orthosilicate to prepare a bleaching composition. These compositions were used to perform the bleaching test and the fungal decontamination test as described above, and the results are shown in Table 2.

[Table 2]

≪ Examples 19 to 22 and Comparative Example 7 to 9 >

Peroxide was added to water in an amount shown in Table 3, and the dicyanamide-based compound was dissolved in the amount shown in Table 3 in this water. The pH of each of these solutions was adjusted to the values shown in Table 3 using sodium metasilicate to prepare a bleaching composition. These compositions were used to perform the bleaching test and the fungal decontamination test as described above, and the results are shown in Table 3.

[Table 3]

According to the results shown in Tables 1 to 3, the dicyanamide-based compound together with any one of hydrogen peroxide, sodium carbonate-hydrogen peroxide adduct, sodium perborate hydrate, and aqueous solution pH of the composition was used with an alkali metal hydroxide or alkali builder And the bleach composition adjusted to 7.5 or more has excellent bleaching and mold removal ability. On the other hand, when the bleach composition does not contain any of the hydrogen peroxide, the sodium carbonate-hydrogen peroxide adduct, and the sodium perborate hydrate, or does not contain the dicyanamide-based compound, or if the pH of the aqueous solution is lower than 7.5 The bleaching or fungus removal effect was limited or not at all.

In the alkali agents used as the pH adjusting agent, the alkali builders of Tables 2 and 3 were more effective than the alkali metal hydroxides of Table 1 for bleaching and removing fungi, and thus it is preferable to use an alkali builder as the alkali agent.

Claims (2)

(1) 0.5 to 60% by weight of hydrogen peroxide, a peroxide capable of producing hydrogen peroxide in an aqueous solution, or a mixture thereof, (2) 0.2 to 30% by weight of at least one of dicyanamide, an alkali metal salt thereof and an ammonium salt thereof And the pH of the composition is at least 7.5. The aqueous bleaching composition of claim 1, wherein the composition further comprises (3) an alkaline or alkaline builder.