JP2008189753A - Liquid bleaching agent composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid bleaching agent composition capable of remarkably improving the bleaching effect of a bleaching activation agent in a system containing 0.1-3 mass% hydrogen peroxide and having suppressed fatty acid odor generating by the decomposition of the bleaching activation agent. <P>SOLUTION: The liquid bleaching agent composition contains (a) hydrogen peroxide, (b) a specific bleaching activation agent, (c) a specific nonionic surfactant having an HLB (Griffin's method) of 13-17, (d) an anionic surfactant and (e) a compound having at least one kind of metal ion selected from alkali metals and alkaline earth metals, wherein the contents of the components (a) to (e) fall within respective specific ranges, the molar concentration of the alkali metal and/or alkaline earth metal containing the component (e) is 200-1,200 mM, and the pH of the composition is 2.5-7 at 20°C. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a liquid bleach composition.

  Liquid bleaching compositions containing bleaching components such as hydrogen peroxide and bleach activators have acidic pH during storage of the bleaching composition from the viewpoint of achieving both the stability of the bleaching composition and the bleaching effect ( For example, the pH needs to be 2 to 3). This is because the bleach base is activated in an alkaline solution and exhibits high performance, but in products with a pH of 2.5 or higher, the decomposition of the bleach activator with hydrogen peroxide proceeds gradually and is stable. This is because the property decreases. Although the stability of hydrogen peroxide can be enhanced by a general radical scavenger, stabilization of the bleach activator is very difficult, and a method for improving it is demanded.

  Patent Document 1 discloses a soil removal composition containing an amide or imide organic peroxyacid / surfactant / pH adjustment system (borate / polyol) having low solubility in water. This Patent Document 1 discloses a stabilization technique in water by a solid dispersion system using a water-insoluble organic peracid, not a system containing hydrogen peroxide, but merely using this technique. The stability of the bleach activator (peracid precursor) is not improved.

  Patent Document 2 discloses a soil removal composition containing a solid, water-insoluble organic peroxyacid / surfactant / pH jump system (borate / polyol) / agar or saccharide. However, the stabilization of the bleach activator in hydrogen peroxide cannot be realized only by using this technique.

  Patent Document 3 discloses a liquid bleach composition in which hydrogen peroxide is stabilized in a high pH range (pH 4 to 7) with a phenol derivative. However, this technique improves the stability of hydrogen peroxide but does not achieve stabilization of the bleach activator.

It is also known that bleach activators such as alkanoyloxybenzene sulfonic acid, alkanoyloxybenzene carboxylic acid, and salts thereof decompose in the product to produce fatty acids and emit fatty acid odors. The stability of the bleach activator in the product is improved by reducing the hydrogen peroxide concentration, but the bleaching power is significantly reduced. At this time, in order to compensate for the decrease in bleaching power, simply increasing the concentration of the bleach activator in the bleach composition does not provide a sufficient bleaching effect, but also decomposes a large amount of the bleach activator. Produces a pronounced fatty acid odor.
Japanese Patent Laid-Open No. 6-100908 JP-A-7-70593 Japanese Patent Laid-Open No. 11-181492

  An object of the present invention is a liquid that drastically improves the bleaching effect of a bleach activator in a system containing 0.1 to 3% by mass of hydrogen peroxide, and suppresses the fatty acid odor generated when the bleach activator is decomposed. It is to provide a bleach composition.

  As a result of intensive studies, the present inventors have found that in a system containing 0.1 to 3% by mass of hydrogen peroxide and using a specific nonionic surfactant and an anionic surfactant in combination, alkali metal and / or alkaline earth. It has been found that by containing a certain amount of a metal and making the electric conductivity in a specific range, the bleaching power can be drastically improved and the fatty acid odor generated when the bleach activator is decomposed can be effectively suppressed.

That is, this invention contains the following (a) component, (b) component, (c) component, (d) component, and (e) component, and the content of (a) component in a composition is 0. 1-3% by mass, (b) component content is 1-10% by mass, (c) component content is 15-50% by mass, and (d) component content is 0.1-15% by mass. Provided is a liquid bleach composition having a molar concentration of alkali metal and / or alkaline earth metal containing component (e) in the composition of 200 to 1200 mM and a pH at 20 ° C. of 2.5 to 7 To do.
(A) component: hydrogen peroxide (b) component: at least one bleach activator selected from alkanoyloxybenzenesulfonic acid, alkanoyloxybenzenecarboxylic acid and salts thereof (c) component: HLB determined by Griffin method Is a nonionic surfactant of 13 to 17, which is selected from a polyoxyethylene alkyl ether type nonionic surfactant and a polyoxyalkylene alkyl ether type nonionic surfactant having an oxyethylene group and an oxypropylene group At least one nonionic surfactant (d) component: an anionic surfactant (e) component: at least one metal ion selected from alkali metals and alkaline earth metals, component (b) and (d ) Compounds other than ingredients

  The liquid bleaching agent composition of the present invention has a drastically improved bleaching power in a region containing 0.1 to 3% by mass of hydrogen peroxide, and can maintain a good odor even after storage.

[(A) component]
The liquid bleach composition of the present invention contains hydrogen peroxide as the component (a).

[Component (b)]
The liquid bleach composition of the present invention contains at least one bleach activator selected from alkanoyloxybenzenesulfonic acid, alkanoyloxybenzenecarboxylic acid and salts thereof as component (b). In the component (b) of the present invention, the alkanoyloxy group preferably has a linear or branched chain having 8 to 14 carbon atoms from the viewpoint of developing an excellent bleaching effect.

  As the component (b) having a branched chain, as the alkanoyloxy group having a side chain at the α-position or β-position of the carbon atom forming the ester bond, a 2-ethylhexanoyl group, a 2-propylheptanoyl group, 3 , 5,5-trimethylhexanoyl group and the like, and benzenesulfonic acid or carboxylic acid having a branched alkanoyloxy group or a salt thereof is particularly preferable. As the salt, sodium salt, potassium salt, and magnesium salt are preferable, and sodium salt is particularly preferable from the viewpoint of solubility.

  Specific examples of the component (b) include compounds represented by the following formulas (1-1) to (1-4).

[Component (c)]
The liquid bleach composition of the present invention is a nonionic surfactant having a HLB of 13 to 17, preferably 13 to 16 as the component (c), and polyoxyethylene alkyl ether type nonionic A surfactant and at least one nonionic surfactant selected from polyoxyalkylene alkyl ether type nonionic surfactants having an oxyethylene group and an oxypropylene group are contained.
Here, HLB calculated | required with the Griffin method is HLB calculated | required with the following formula | equation.

HLB value = 20 × total formula weight of hydrophilic part / molecular weight (c) The component is preferably a compound represented by the following general formula (2).

R ^2a -O (EO) _m (PO) _n -H (2)
[Wherein R ^2a represents a hydrocarbon group having 8 to 10 carbon atoms, preferably 10 to 18 carbon atoms, more preferably 12 to 14 carbon atoms, still more preferably an alkyl group or an alkenyl group. EO is an oxyethylene group, PO is an oxypropylene group, m is a number from 1 to 20 indicating the average number of added moles of EO, n is a number from 0 to 20 indicating the average number of added moles of PO, and m and n Indicates the number selected so that the HLB determined by the Griffin method in the relationship with R ^2a is 13-17. Preferably, m is a number of 6 to 15, more preferably 7 to 12, and n is preferably a number of 0 to 10, more preferably 1 to 5, particularly preferably 1 to 3. ]
In general formula (2), when n is not 0, EO and PO may be arranged in either random addition form or block addition form, but are represented by the following general formula (3). Compounds are particularly preferred.

R ^3a -O (C ₂ H ₄ O) _p (C ₃ H ₆ O) _q (C ₂ H ₄ O) _r -H (3)
[Wherein, R ^3a is a hydrocarbon group having 8 to 18 carbon atoms, preferably 10 to 14 carbon atoms, more preferably an alkyl group or an alkenyl group, and still more preferably an alkyl group. p, q and r are each independently a number of 1 to 10, preferably 2 to 8. Further, p, q and r are such that the HLB determined by the Griffin method in relation to R ^3a is 13 to 17. Selected. ]
Examples of the nonionic surfactant represented by the general formula (2) or the general formula (3) include the following compounds.

C ₁₂ H ₂₅ —O (C ₂ H ₄ O) _m1 —H (m ₁ = 7 to 20, HLB = 13.3 to 16.9)
C ₁₄ H ₂₉ —O (C ₂ H ₄ O) _m2 —H (m ₂ = 7 to 24, HLB = 13.1 to 17.0)
C ₁₂ H ₂₅ —O (C ₂ H ₄ O) _p1 (C ₃ H ₆ O) ₂ (C ₂ H ₄ O) _r1 —H
(P ₁ + r ₁ = 5 to 18, HLB = 13.4 to 17.0)
In the present invention, as the component (c), in the general formula (2), m is 8 to 12, and n is 0 to 3 polyoxyalkylene alkyl ether type nonionic surfactant component (HLB 13.1 to 17). It is most preferable from the viewpoint of cleaning effect.

[Component (d)]
The liquid bleach composition of the present invention contains an anionic surfactant as the component (d). Examples of the anionic surfactant include alkylbenzene sulfonate, polyoxyalkylene alkyl ether sulfate, alkyl sulfate, α-olefin sulfonate, α-sulfo fatty acid salt, α-sulfo fatty acid lower alkyl ester salt and the like. In particular, at least one anionic surfactant selected from alkylbenzene sulfonate, polyoxyalkylene alkyl ether sulfate ester salt, α-sulfo fatty acid salt, and α-sulfo fatty acid lower alkyl ester salt is preferable.

  As the component (d), an alkyl (or alkenyl) benzene sulfonate having an alkyl group or an alkenyl group having 10 to 18 carbon atoms, a polyoxyalkylene alkyl (or alkenyl) having an alkyl group or alkenyl group having 10 to 18 carbon atoms ) Ether sulfate ester salt, alkyl (or alkenyl) sulfate ester salt having 10 to 18 carbon atoms or alkenyl group, α-olefin sulfonate (10 to 18 carbon atoms), α-sulfo fatty acid salt (carbon number) 10-18) or [alpha] -sulfo fatty acid (10 to 18 carbon atoms) lower alkyl (1 to 3 carbon atoms) ester salt and the like, and in particular, alkylbenzene sulfonates and polyoxyalkylene alkyls satisfying these carbon numbers Ether sulfate ester salt, alkyl sulfate ester salt, α-sulfo fatty acid salt α- sulfofatty acid lower alkyl ester salts are preferred.

Any alkylbenzene sulfonate can be used as long as the alkyl group has an average carbon number of 10 to 18 among those generally distributed in the detergent surfactant market. For example, Kao Corporation Neoperex F25 made by Shell, Dobs102 made by Shell, etc. can be used. Industrially, alkylbenzene widely distributed as a detergent raw material can be obtained by sulfonation using an oxidizing agent such as chlorosulfonic acid or sulfurous acid gas. The average carbon number of the alkyl group is preferably 10-16. In addition, as polyoxyalkylene alkyl ether sulfate ester salt, an average of 0.5 to 5 mol of ethylene oxide per molecule is added to a linear or branched primary alcohol or linear secondary alcohol having an average carbon number of 10 to 18 per molecule. This can be obtained by sulfation using, for example, the method described in JP-A-9-137188. The average carbon number of the alkyl group is preferably 10-16. The alkyl sulfate salt is obtained by sulfonating a linear or branched primary alcohol or linear secondary alcohol having 10 to 16 carbon atoms, preferably 10 to 14 with SO ₃ or chlorosulfonic acid, and neutralizing. it can. As α-olefin sulfonate, 1-alkene having 10 to 18 carbon atoms can be obtained by sulfonation with SO ₃ , hydration and neutralization, and a compound having a hydroxyl group in a hydrocarbon group. A mixture of compounds in which a saturated bond is present. In addition, the α-sulfo fatty acid lower alkyl ester salt preferably has 10 to 16 carbon atoms in the fatty acid residue, and methyl ester or ethyl ester is preferable from the viewpoint of cleaning effect. As the salt, sodium salt, potassium salt, magnesium salt, calcium salt, alkanolamine salt, and ammonium salt are preferable, and sodium salt, potassium salt, and magnesium salt are preferable from the viewpoint of cleaning effect.

  In the present invention, the polyoxyethylene alkyl sulfate salt having an alkyl group having 10 to 14 carbon atoms and an ethylene oxide average addition mole number of 1 to 3, having a small effect on the stability of the bleach activator and having a high bleach washing effect, and Alkyl benzene sulfonates having 11 to 15 carbon atoms in the alkyl group are particularly good.

[(E) component]
The liquid bleach composition of the present invention contains a compound other than the component (b) and the component (d) having at least one metal ion selected from alkali metals and alkaline earth metals as the component (e).

  The component (e) used in the present invention is preferably a compound having an alkali metal ion from the viewpoint of increasing the ionic strength of the composition and obtaining a good liquid feeling, and is lithium, sodium, potassium, rubidium, cesium or francium. And halides, sulfates, carbonates, hydroxides, acetates, phosphates, organic acid salts and the like. Among these, sulfates such as sodium sulfate and potassium sulfate, carbonates such as sodium carbonate and potassium carbonate, hydroxides such as sodium hydroxide and potassium hydroxide, and phosphates such as sodium phosphate and potassium phosphate are preferable. .

  In the present specification, when simply referring to alkali metal and / or alkaline earth metal, it means all alkali metals and alkaline earth metals contained in the composition. That is, the alkali metal and / or alkaline earth metal includes, in addition to the component (e), for example, an alkali metal and / or alkaline earth metal derived from the component (b), the component (d), the pH adjuster, and the like. obtain.

[Liquid bleach composition]
The liquid bleach composition of this invention contains (a) component, (b) component, (c) component, (d) component, and (e) component as an essential component. The content of the component (a) in the composition of the present invention is 0.1 to 3% by mass and 0.5 to 2.5% by mass from the viewpoint of obtaining high bleach activator stability and high bleaching performance. % Is preferable, and 1-2 mass% is more preferable. The content of the component (b) is 1 to 10% by mass, preferably 1 to 6% by mass, and preferably 1 to 4% by mass from the viewpoint of developing an excellent bleaching effect and maintaining the odor of the product well. Is more preferable. The content of the component (c) is 15 to 50% by mass, preferably 20 to 50% by mass, and more preferably 25 to 50% by mass from the viewpoint of keeping electric conductivity in a certain range and obtaining high bleaching power. . (D) Content of a component is 0.1-15 mass% from a viewpoint of keeping the smell of a product favorable, 0.5-10 mass% is preferable and 1-5 mass% is more preferable.

  The molar concentration of the alkali metal and / or alkaline earth metal containing the component (e) in the composition of the present invention is 200 to 1200 mM from the viewpoint of increasing the ionic strength of the composition and obtaining a good liquid feeling, 300-800 mM is preferable and 300-650 mM is more preferable.

  In the present invention, the molar concentration of alkali metal and / or alkaline earth metal in the liquid bleach composition was measured by AA-855, an atomic absorption / flame light combined spectrophotometer AA-855 manufactured by Japan Jarrell Ash. In addition, the electrical conductivity of the composition at 25 ° C. is preferably 0.6 S / m or less, more preferably 0.5 S / m or less, and more preferably 0.3 S from the viewpoint of suppressing fatty acid odor during decomposition of the bleach activator. / M or less is more preferable. Thus, by setting electrical conductivity to a predetermined value or less, the storage stability of the composition in pH 2.5-7 can be improved, and also a fatty-acid odor can be suppressed. In addition, in order to adjust electrical conductivity, inorganic ions can be removed by electrodialysis or the like.

  In order to adjust such electrical conductivity within a predetermined range, the molar concentration of the alkali metal and / or alkaline earth metal containing the component (e) is adjusted to be in the above range. The electrodialysis method can be applied to the adjustment of the molar concentration of the alkali metal and / or alkaline earth metal containing the component (e) as in the adjustment of the electric conductivity.

  The electrical conductivity at 25 ° C. of the composition of the present invention is measured by CONDUCTIVITY METER CM-60S manufactured by Toa Denpa Kogyo Co., Ltd.

  In the present invention, by setting the content of the component (b), the component (c), the component (d), and the molar concentration of the alkali metal and / or alkaline earth metal containing the component (e) to a specific range, An excellent bleaching effect can be obtained in a region where the component (a) has a relatively low concentration.

  Such an effect is considered to be obtained because the component (b) and the component (e) are present in the micelles of the component (c) and the component (d) under the above conditions. Since the component (e) is present in the micelle, the mobility is lowered and the electrical conductivity in the liquid bleaching composition is lowered to a specific range, while the component (e) is present in the micelle at a high concentration. Hydrogen peroxide ions released to the outside can be attracted to the micelle side. As a result, the hydrogen peroxide ions can interact closely with the component (b) in the micelle, so that organic peracids can be generated efficiently, and the bleaching power of the liquid bleach composition has been significantly improved. I'm guessing. Although the bleaching effect can be obtained with the component (c) alone, the present inventor has found that the combined use of the component (d) exhibits extremely high bleaching performance.

  Furthermore, the liquid bleach composition of the present invention can suppress the fatty acid odor generated when the bleach activator is decomposed. In the liquid bleach composition of the present invention, the component (b) and the component (e) are present in the micelles of the component (c) and the component (d) at a high concentration. It is presumed that the salt can be efficiently converted to a salt with the fatty acid odor. Even if an anionic surfactant is not added, the effect of suppressing the fatty acid odor can be obtained, but the effect is remarkably improved by using the anionic surfactant in combination, and the pH region where the strength of the fatty acid odor is particularly high (specifically In particular, it has been found that the suppression effect at pH 2.5 to 5) is remarkably improved. Although this mechanism is not clear, the dissolved state of mixed micelles of nonionic surfactant / fatty acid / anionic surfactant in a system with high ionic strength tends to become stronger, and fatty acids are less likely to move into the bulk. It is thought to have developed.

[Other optional ingredients]
The liquid bleach composition of the present invention is used as a component (f) in order to impart a pH jump effect, that is, to keep the pH of the composition low during storage and to increase the pH when diluted in use. It is preferable to contain a boron compound. The content of the component (f) in the composition is preferably 0.05 to 2% by mass, more preferably 0.05 to 1% by mass, and still more preferably 0.15 to 0.5% by mass as a boron atom. 0.2 to 0.4 mass% is particularly preferable.

  Examples of the boron compound include boric acid, sodium borate, potassium borate, ammonium borate, sodium tetraborate, potassium potassium borate, and ammonium ammonium borate. Among the boron compounds, it is preferable that the di-isomer is a main component in order to make the pH of the diluted solution weakly alkaline (pH 8 or more), and 70 to 100 mol% of the boron compound is contained in the composition of the present invention. The di-form is preferable.

  In order to maintain the pH control effect under high dilution conditions, the liquid bleach composition of the present invention has at least one site having one hydroxyl group on each of adjacent carbon atoms as component (g). It is preferable to contain a compound. The content of the component (g) in the composition is preferably 3 to 35% by mass, more preferably 5 to 30% by mass, and particularly preferably 7 to 20% by mass.

  Specific examples of the component (g) include the following compounds (1) to (4).

(1) Glycerin, diglycerin, triglycerin, alkyl glyceryl ether having 1 to 10 carbon atoms of alkyl group, alkyl diglyceryl ether, alkyl triglyceryl ether; glycerol or glycol selected from ethylene glycol and 1,2-propylene glycol (2) Sugar alcohols selected from sorbitol, mannitol, maltose, inositol, phytic acid (3) Reduction selected from glucose, apiose, arabinose, galactose, lyxose, mannose, galose, aldose, idose, talose, xylose, fructose Sugars (4) A polysaccharide selected from starch, dextran, xanthan gum, guar gum, curdlan, pullulan, amylose and cellulose.

  In the present invention, the sugar alcohols of the above (2) are particularly preferable, and sorbitol is particularly preferable from the viewpoint of stability and bleaching / washing effect.

  Moreover, since there exists a possibility that the stability of hydrogen peroxide may be impaired when (g) component exists excessively, from the viewpoint of satisfying both the excellent pH jump effect and stability of hydrogen peroxide, (g) component and ( f) The ratio of the component is [(g) component] / [boron atom in (f) component] (for example, in the case of borax and sodium tetraborate, it contains 4 boron atoms, It is preferably 1.5 to 4.0, more preferably 2.0 to 4.0, and particularly preferably 2.2 to 4.0.

  The composition of the present invention preferably contains a sequestering agent (hereinafter referred to as component (h)) from the viewpoint of further improving the bleaching effect. The content of the component (h) in the composition is preferably 0.05 to 0.3% by mass, more preferably 0.1 to 0.25% by mass, and particularly preferably 0.15 to 0.2% by mass.

  As the component (h) used in the present invention, a compound having a phosphonic acid group or a phosphonic acid group is preferable. Specific compounds having a phosphonic acid group or phosphonic acid group include ethane-1,1-diphosphonic acid, ethane-1,1,2-triphosphonic acid, ethane-1-hydroxy-1,1-diphosphonic acid, and ethane. Phosphonic acid selected from hydroxy-1,1,2-triphosphonic acid, ethane-1,2-dicarboxy-1,2-diphosphonic acid, methanehydroxyphosphonic acid, or an alkali metal salt or alkanolamine salt thereof, 2-phosphonobutane And phosphonocarboxylic acids selected from -1,2-dicarboxylic acid, 1-phosphonobutane-2,3,4-tricarboxylic acid, α-methylphosphonosuccinic acid, and alkali metal salts or alkanolamine salts thereof. Phosphonic acid or an alkali metal salt thereof, preferably ethane-1-hydride Carboxy-1,1-diphosphonic acid or alkali metal salts thereof are most preferred.

  The liquid bleach composition of the present invention may contain at least one selected from a cationic surfactant and an amphoteric surfactant from the viewpoint of obtaining excellent detergency.

  As the cationic surfactant, one or two hydrocarbon groups having 10 to 18 carbon atoms which may be separated by an ester group or an amide group, and the remaining are alkyl groups or hydroxyalkyl groups having 1 to 3 carbon atoms. A quaternary ammonium salt, preferably an alkyl sulfate salt having 1 to 3 carbon atoms, is suitable.

  The amphoteric surfactant preferably contains at least one selected from the compounds represented by the following general formula (4) or general formula (5) from the viewpoint of cleaning effect.

[Wherein, R ^4a is a linear alkyl group or alkenyl group having 8 to 16 carbon atoms, preferably 10 to 16 carbon atoms, particularly preferably 10 to 14 carbon atoms, and R ^4c and R ^4d each independently represents 1 to 1 carbon atoms. 3 is an alkyl group or a hydroxyalkyl group, preferably a methyl group, an ethyl group or a hydroxyethyl group. R ^4b is an alkylene group having 1 to 5 carbon atoms, preferably 2 or 3 carbon atoms. A is a group selected from —COO—, —CONH—, —OCO—, —NHCO—, and —O—, and s is a number of 0 or 1. ]

[Wherein R ^5a is an alkyl group or alkenyl group having 9 to 23 carbon atoms, preferably 9 to 17 carbon atoms, particularly preferably 9 to 15 carbon atoms, and R ^5b is an alkylene group having 1 to 6 carbon atoms, preferably 2 or 3 carbon atoms. It is a group. B is a group selected from —COO—, —CONH—, —OCO—, —NHCO—, and —O—, and t is a number of 0 or 1. R ^5c and R ^5d are each independently an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group, and R ^5e is an alkylene having 1 to 5 carbon atoms, preferably 1 to 3 carbon atoms optionally substituted with a hydroxyl group. It is a group. D is _{^{-COO -, -SO 3 -, -OSO}} 3 - is a group selected from. ]

  The composition of the present invention has a pH at 20 ° C. of 2.5 to 7, preferably 3.5 to 6, more preferably 3.5 to 5.5, still more preferably 3.5 to 5.0, particularly Preferably it is 3.5-4.8. In this pH range, a bleaching activator can be stabilized and a bleaching performance excellent after bleaching and a liquid bleaching composition with improved fatty acid odor can be obtained. The pH is measured at 20 ° C. using a pH meter F52 manufactured by Horiba, Ltd. and a pH electrode 6367-S004. The liquid bleach composition of the present invention is suitable for textile products such as clothing.

  As the pH adjuster, inorganic acids such as hydrochloric acid, sulfuric acid, and phosphoric acid can be used as acid agents, and sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, and the like can be used as alkaline agents.

Examples 1-5 and Comparative Examples 1-3
A liquid bleach composition having the composition shown in Table 1 was prepared using the following components. About this liquid bleach composition, the bleaching performance, the storage stability of the bleach activator and the odor after storage were evaluated by the following methods. The results are shown in Table 1.

<Composition ingredients>
a-1; hydrogen peroxide b-1; bleach activator b-2 represented by the above formula (1-1); bleach activator c-1 represented by the above formula (1-3); Oxyethylene lauryl ether (oxyethylene average addition mole number 8, HLB13.1)
_{c-2; C 12 H 25} O- (C 2 H 4 O) 7 - (C 3 H 6 O) 2 - (C 2 H 4 O) 4 -H (HLB15.8)
c-3; polyoxyethylene lauryl ether (oxyethylene average addition mole number 12, HLB15.3)
d-1: sodium alkylbenzene sulfonate (LAS, Neoperex G25 manufactured by Kao Corporation)
d-2: sodium polyoxyethylene alkyl ether sulfate (oxyethylene average addition mole number 3)
e-1; sodium citrate e-2; sodium hydroxide e-3; potassium carbonate f-1; boric acid (when the compounding amount in the table is, for example, 1.5% by mass, the boron atom is 0.26 (Mass% blending amount)
g-1; D-sorbitol h-1; sequestering agent, ethane-1-hydroxy-1,1-diphosphonic acid (Daiquest 2010, manufactured by Solusia)

<Evaluation method of bleaching performance>
1 ml each of the liquid bleach composition was applied to the meat sauce-contaminated cloth (4 sheets) prepared by the following method, and after 5 minutes, a washing process was performed for 10 minutes using a tartometer (rotation speed: 80 rpm, Washing water; 5 ° DH, 20 ° C., 1 L). After thoroughly rinsing with tap water and drying, the reflectance of the fabric surface before and after the treatment was measured to obtain the bleaching rate according to the following formula.

-Preparation of Meat Sauce Contaminated Cloth Solid content of meat sauce (meat sauce of ripe tomatoes (expiration date of August 9, 2008, lot number: D6809JC) / canned content of 295 g) manufactured by Kagome Co., Ltd. (mesh opening; 500 μm) ), And the resulting liquid was heated until boiling. Cotton gold cloth # 2003 was immersed in this solution and boiled for 15 minutes. After removing from the fire as it was for about 2 hours and leaving it to 30 ° C., the cloth was taken out and the excess liquid was removed with a spatula and allowed to dry naturally. Thereafter, it was pressed and subjected to an experiment as a 10 × 10 cm test cloth.

<Method for evaluating storage stability of bleach activator>
80 g of the liquid bleach composition was placed in a 100 mL glass sample bottle and stored at 30 ° C. for 1 month. The content of the bleach activator in the liquid bleach composition before and after storage was measured by high performance liquid chromatography, and the residual ratio of the bleach activator was determined by the following formula.

<Evaluation method of odor after storage>
80 g of the liquid bleach composition was placed in a 100 mL glass sample bottle, and the odor strength of the sample after storage at 40 ° C. for 1 month was subjected to sensory evaluation. Evaluation was performed according to the following criteria by five skilled panelists (five women in their 20s to 30s).
1: Odor that is odorless or slightly felt 2: Smell that is easily felt 3: Strong odor 4: Strong odor that cannot be tolerated

Claims (4)

The following (a) component, (b) component, (c) component, (d) component, and (e) component are contained, and (a) component content in a composition is 0.1-3 mass%, The content of the component (b) is 1 to 10% by mass, the content of the component (c) is 15 to 50% by mass, the content of the component (d) is 0.1 to 15% by mass, (E) The liquid bleach composition whose molar concentration of the alkali metal and / or alkaline-earth metal containing a component is 200-1200 mM, and the pH in 20 degreeC is 2.5-7.
(A) component: hydrogen peroxide (b) component: at least one bleach activator selected from alkanoyloxybenzenesulfonic acid, alkanoyloxybenzenecarboxylic acid and salts thereof (c) component: HLB determined by Griffin method Is a nonionic surfactant of 13 to 17, which is selected from a polyoxyethylene alkyl ether type nonionic surfactant and a polyoxyalkylene alkyl ether type nonionic surfactant having an oxyethylene group and an oxypropylene group At least one nonionic surfactant (d) component: an anionic surfactant (e) component: at least one metal ion selected from alkali metals and alkaline earth metals, component (b) and (d ) Compounds other than ingredients   The liquid bleach composition according to claim 1, wherein the electrical conductivity at 25 ° C is 0.6 S / m or less.   The component (d) is at least one anionic surfactant selected from alkylbenzene sulfonate, polyoxyalkylene alkyl ether sulfate ester salt, α-sulfo fatty acid salt, and α-sulfo fatty acid lower alkyl ester salt. Item 3. The liquid bleach composition according to Item 1 or 2.   Further, (f) at least one compound selected from boron compounds as a component, and (g) a compound having one or more sites each having one hydroxyl group on both adjacent carbon atoms as a component, The liquid bleach composition in any one of Claims 1-3.