JPH10310792A - Liquid oxygen-based bleaching agent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition capable of stably maintaining hydrogen peroxide also in a high pH region, capable of exhibiting an excellent bleaching effect and useful for clothes, etc., by including hydrogen peroxide and a specific aromatic compound. SOLUTION: This liquid oxygen-based bleaching agent composition comprises (A) hydrogen peroxide and (B) an aromatic compound of the formula [R is H, a 1-12C alkyl, an alkenyl; (n) is 1-6], such as hydroquinone, methoxyphenol or dimethoxyphenol. For example, the agent comprises 0.1-30 wt.% of the component A, 0.01-10 wt.% of the component B and preferably further (C) about 1-40 wt.% of a nonionic surfactant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid oxygen bleaching detergent composition which can be suitably used as a bleaching composition for clothing, kitchens, hard surfaces and the like.

2. Description of the Related Art Oxygen bleaching agents have the characteristic that they can be used for colors and patterns, and have become the mainstream bleaching agents for clothing. Oxygen bleaching agents include powder type and liquid type, each having its own characteristics. Liquid oxygen bleach has been recognized for its ease of use and has been widely used, and has become the mainstream bleach for clothing. Although the main bleaching base material of this oxygen bleach is hydrogen peroxide, its bleaching power is inferior to that of chlorine bleach, and its improvement is a problem. Many studies have been made on improving the bleaching power of oxygen-based bleaches. One approach is to use an organic peracid precursor. The organic peracid precursor reacts with hydrogen peroxide in the cleaning solution to produce an organic peracid having higher bleaching power. This is the mechanism by which the stains are strongly decomposed by the organic peracid generated here.

As the peroxide that generates hydrogen peroxide in the cleaning liquid used here, sodium percarbonate and sodium perborate are widely used in powder type bleaching agents or in heavy detergents having bleaching performance. In liquid bleach, hydrogen peroxide is mainly used. The organic peracid precursor includes, for example, tetraacetylethylenediamine (TAED), glucose pentaacetate (PA
G) and phenol derivative alkyl esters. Another issue is stabilization of hydrogen peroxide. Hydrogen peroxide normally decomposes under alkaline conditions to generate oxygen gas. Therefore, the liquid oxygen bleach currently on the market is adjusted to be acidic. However, the bleaching effect of hydrogen peroxide is higher under alkaline conditions than under acidic conditions, so that it is generally used in combination with a detergent. That is, another problem is to exert a high bleaching effect even when used alone. As a means for achieving this, research has been conducted to make hydrogen peroxide exist stably at a higher pH. As an example, see JP-A-2-
Japanese Unexamined Patent Publication No. 227498, Japanese Unexamined Patent Publication No. 26227499 and Japanese Unexamined Patent Publication No. 3-200899 disclose techniques for stabilizing hydrogen peroxide in a neutral to alkaline region. However, although the stability of hydrogen peroxide is improved by these techniques, it is insufficient in securing quality of household products, and a more effective stabilization technique is required.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid oxygen-based bleaching composition capable of stably maintaining hydrogen peroxide even in a high pH range and exhibiting an excellent bleaching effect.

The present invention has been made based on the finding that the use of an aromatic compound having a hydroxy group and / or an alkoxy group in an aromatic ring together with hydrogen peroxide can effectively solve the above problems. It was done. That is, the present invention provides a liquid oxygen bleach composition comprising hydrogen peroxide and an aromatic compound represented by the general formula (I).

[0004]

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(Wherein R is a hydrogen atom, having 1 to 12 carbon atoms)
And n is an integer of 1 to 6, and when n is an integer of 2 to 6, a plurality of —OR groups may be the same or different from each other. )

DETAILED DESCRIPTION OF THE INVENTION In the present invention, hydrogen peroxide (a component) as a bleaching base is contained in an amount of 0.1 to 30% by weight in the composition.
(Hereinafter abbreviated as%), more preferably 2 to 20%. The aromatic compound (component b) represented by the general formula (I) used in the present invention has an effect of suppressing the decomposition of hydrogen peroxide. In the formula, R is preferably a hydrogen atom, an alkyl group or an alkenyl group having 1 to 6 carbon atoms,
More preferred are a hydrogen atom and an alkyl group having 1 to 3 carbon atoms, and most preferred are a hydrogen atom and a methyl group.
Also, n is preferably from 1 to 4, more preferably 1
３3, most preferably 1 or 2. When n is 2 or more, at least one of the —OR groups is preferably an —OH group. Examples of the aromatic compound represented by the general formula (I) include the following compounds, but are not limited thereto.

[0006]

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[0007]

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[0008] Of the above compounds, hydroquinone, methoxyphenol and dimethoxyphenol are preferred. The aromatic compound represented by the general formula (I) can be used alone or as a mixture of two or more kinds. In the present invention, the composition preferably contains the aromatic compound (component b) represented by the general formula (I) in an amount of 0.001 to 10%, more preferably 0.1 to 5%. The liquid oxygen-based bleach composition of the present invention contains the above component a and component b, and the remainder can be water, but can further contain a surfactant (component c).

Examples of the surfactant that can be used include a surfactant having at least one linear or branched alkyl or alkenyl group having 8 to 24 carbon atoms, or a surfactant having 8 carbon atoms.
It is preferable to use a surfactant having at least one aryl group substituted with an alkyl group of from 24 to 24. Examples of such surfactants include anionic surfactants such as alkyl benzene sulfonate, soap, alkyl sulfate, polyoxyethylene alkyl sulfate, fatty acid α-sulfomethyl ester, alkyl (poly) glycoside, and polyoxyethylene. Alkyl ether, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester,
Nonionic surfactants such as polyoxyethylene fatty acid ester, polyoxyethylene fatty acid ester oxyethylene propylene block polymer, fatty acid monoglyceride, and amine oxide are exemplified. Further, amphoteric surfactants such as carbobetaine, sulfobetaine, and hydroxysulfobetaine can also be mentioned. Of these, nonionic surfactants are preferred. Further, a nonionic surfactant such as an alkylene oxide (ethylene oxide and / or propylene oxide) adduct of a linear or branched carboxylic acid having a carbon chain length of 1 to 18, a lower alkyl ester thereof, and a glycerin fatty acid ester is also preferable.

In the present invention, the composition preferably contains a surfactant (component (c)) in an amount of 1 to 40%, more preferably 1 to 20%. A chelating agent can be added to the liquid oxygen bleach composition of the present invention. Examples include ethane 1,1, -diphosphonic acid, ethane 1,
1,2-triphosphonic acid, ethane-1-hydroxy 1,
Phosphonic acid compounds such as 1,2-triphosphonic acid, ethane-1-hydroxydiphosphonic acid, ethane 1,1,2-triphosphonic acid and alkali metal salts thereof, and derivatives thereof; nitrilotriacetic acid, iminodiacetic acid, ethylenediaminetetraacetic acid And the like and carboxylic acid chelating agents and alkali metal salts thereof. Examples of the polymer chelating agent include acid forms of polyacrylic acid, polymaleic acid, and acrylic acid-maleic acid copolymer or alkali metal salts. These molecular weights are conveniently in the range of 1,000 to 300,000, preferably 10,000 to 100,000.
It is. These polymers may be linear or crosslinkable. In the present invention, these chelating agent surfactants are preferably contained in the composition in an amount of 5% or less.

The composition of the present invention may contain, in addition to water, alcohols such as ethanol, isopropanol and ethylene glycol, and hydrotropes such as polyethylene glycol and glycerin in order to stabilize the liquid at a low temperature and maintain freeze-recoverability. Can be contained. Further, as an optional component, a component such as a thickener, a fragrance, a colorant, a fluorescent dye, and an enzyme, which is generally blended in a detergent for clothing or a bleaching agent, can be contained as necessary. PH of the liquid oxygen-based bleach composition of the present invention
As an acidic substance, an inorganic acid such as hydrochloric acid or sulfuric acid, p-toluenesulfonic acid, citric acid, a phosphonic acid derivative, or an organic acid such as phosphoric acid, and as an alkaline component, sodium hydroxide, potassium hydroxide, It is preferably adjusted to 5 to 11 using sodium carbonate, sodium hydrogen carbonate, ammonia or the like, and more preferably 5 to 9.

[0012]

According to the present invention, there is provided a liquid oxygen-based bleaching composition in which hydrogen peroxide is stably present even in a neutral to alkaline region, and exhibits high bleaching power for all stain stains to be bleached. Things are provided. Next, the present invention will be described with reference to examples.

【Example】

Examples 1 to 11 and Comparative Examples 1 and 2 The liquid bleach compositions shown in Table 1 (in addition to the components described in the table,
Was prepared, the pH was adjusted to 6 to 9 with sodium hydroxide or sulfuric acid, and the performance was evaluated by the following method. The results are summarized in Table 1. Evaluation of stability of hydrogen peroxide (gas generation amount) 500 ml of the bleaching composition shown in Table 1 was stored at 50 ° C for 4 weeks, and the volume of generated gas was measured.

[0013]

[Table 1] Table-1 No. 1 2 3 4 5 6 7 8 Hydrogen peroxide 5% 5 5 5 5 5 5 5 b-1 1% b-2 0.1 0.01 b-3 0.1 b-4 0.5 b-5 2 b-6 0.1 1 POE -AE 2 222 POE-FE 23 3 ethane- 1 -hydroxy - 1 -diphosphonic acid 0.1% 0.3 0.5 0.1 0.3 0.2 EDTA 0.2 formulated flavor 0.1 0.1 0.1 acid dye (ppm) 100 100 100 pH 6 8 6 9 6 7 6 8 Gas generation amount (ml) 17 20 18 35 22 25 17 28

[0014]

[Table 2] Continued from Table-1 No. 9 10 11 1 * 2 * Hydrogen peroxide 5 5 5 5 5 b-7 0.5 b-9 1 b-10 1 POE-AE 2 LAS 4 AOS 32 Carboxybetaine 2- ethane- 1 -hydroxy - 1 -diphosphone Acid 0.2% 0.1 0.5 1 Compounded fragrance 0.1 Acid dye (ppm) 100 pH 9 6 7 7 6 Gas generation (ml) 33 18 19 320 532

In the table, POE-AE is a polyoxyethylene alkyl ether (average addition mole number of ethylene oxide of 10, alkyl group carbon number is 14). POE-FE is polyoxyethylene fatty acid ester [average addition mole number of ethylene oxide of 11; The fatty acid has 12 carbon atoms] LAS is sodium straight-chain alkylbenzene sulfonate [alkyl groups having 14 and 16 carbon atoms] AOS is α-olefin sodium sulfonate [olefin has 14 and 16 carbon atoms] Carboxybetaine is C ₁₂ H ₂₅ N ⁺ (CH ₃ ) ₂ CH
₂ COO ^- is.

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Claims (1)

[Claims] 1. A liquid oxygen-based bleaching composition comprising hydrogen peroxide and an aromatic compound represented by the general formula (I). Embedded image (Wherein, R is a hydrogen atom, an alkyl or alkenyl group having 1 to 12 carbon atoms, n is an integer of 1 to 6, and n is 2 to 2)
In the case of the integer of 6, a plurality of —OR groups may be the same or different from each other. )