JPH1081896A - Liquid bleach composition - Google Patents

Abstract

(57) [Problem] To provide a liquid oxygen-based bleach containing an unstable fragrance component for hydrogen peroxide without causing a change in fragrance during storage and suppressing the decomposition of hydrogen peroxide. Of liquid oxygen-based bleaching agent. SOLUTION: (a) hydrogen peroxide or an inorganic peroxide generating hydrogen peroxide in an aqueous solution, (b) a nonionic surfactant or an anionic surfactant, (c) a calcium chelate constant (pKca) Is a chelating agent having 4 or more, and (d) at least one functional group which is unstable to hydrogen peroxide in the molecule.
A perfume composition containing at least 10% by weight of a fragrance component having a specific content, and an acidity adjusted so that an N / 10 NaOH aqueous solution necessary for adjusting a liquid bleach composition 1000 ml to pH 6.0 becomes 50 ml or more. Liquid bleach composition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to liquid bleach compositions. More specifically, the present invention relates to an acidic liquid bleach composition that does not cause a decrease in bleaching performance or a change in aroma even when stored for a long period of time.

[0002]

2. Description of the Related Art Bleaching agents are classified into chlorine bleaching agents and oxygen bleaching agents. Chlorine bleaching agents are limited in the types of fibers that can be used, cannot be used for colors and patterns, and have a peculiar odor. Therefore, oxygen-based bleaches free of these drawbacks have recently become very popular. Of these oxygen bleach, sodium percarbonate and sodium perborate are used as powder bleach, and hydrogen peroxide is used as liquid oxygen bleach, but liquid oxygen bleach is used in clothing. It is particularly preferred because of its ease of use, such as direct application.

[0003] Such a liquid oxygen bleaching agent is usually added with a fragrance component from the viewpoint of palatability. However, because hydrogen peroxide, a bleaching active species of liquid oxygen bleach, has a strong oxidizing power, it reacts with fragrance components, causing a change in odor during storage and promoting decomposition of hydrogen peroxide. was there.

A method for solving such a problem is disclosed in
These are disclosed in JP-A-60-23498, JP-A-64-31897 and JP-A-3-115399. In such prior art, changes in aroma and decomposition of hydrogen peroxide are suppressed by adding an aroma component that does not easily react with hydrogen peroxide. However, the design of the fragrance composition is limited due to the limited fragrance component, and the suppression of hydrogen peroxide decomposition is still insufficient.

[0005] Therefore, the problem to be solved by the present invention is:
Provide liquid oxygen bleach that does not cause a change in fragrance during storage and suppresses decomposition of hydrogen peroxide even if a fragrance component unstable to hydrogen peroxide is blended with liquid oxygen bleach Is to do.

[0006]

Means for Solving the Problems As a result of intensive studies, the present inventors have formulated a specific amount of a specific chelating agent, and
The present inventors have found that the above-mentioned problems can be solved by adjusting the amount of the N / 10 NaOH aqueous solution necessary for adjusting 1000 ml to pH 6.0 to be a specific amount or more and giving the liquid bleach composition a buffering capacity. The invention has been completed. That is, the present invention relates to (a) 1 to 7% by weight of hydrogen peroxide or an inorganic peroxide that generates hydrogen peroxide in an aqueous solution; and (b) at least one selected from nonionic surfactants and anionic surfactants. 1% to 50% by weight of one surfactant. (C) 0.5 to 2% by weight of a chelating agent having a calcium chelating constant (pKca) of 4 or more. (D) A functional group which is unstable to hydrogen peroxide in the molecule. It contains 0.001 to 5% by weight of a fragrance composition containing 10% by weight or more of at least one fragrance component, and the N / 10 NaOH aqueous solution required to make 1000 ml of the liquid bleach composition to pH 6.0 becomes 50 ml or more. It is intended to provide an acidic liquid bleach composition characterized in that the composition is adjusted to:

[0007]

Embodiments of the present invention will be described below in detail.

[Component (a)] The composition of the present invention contains, as the component (a), hydrogen peroxide or an inorganic peroxide that generates hydrogen peroxide in an aqueous solution. Examples of the inorganic peroxide that generates hydrogen peroxide in an aqueous solution include percarbonate, perborate, perphosphate, and persilicate, and sodium percarbonate and sodium perborate are preferred.

The content of the component (a) in the composition of the present invention is 1
-7% by weight, preferably 1-6% by weight. If the content of the component (a) is less than 1% by weight, sufficient bleaching performance cannot be obtained, and if it exceeds 7% by weight, the storage stability decreases.

[Component (b)] The composition of the present invention contains, as the component (b), at least one surfactant selected from nonionic surfactants and anionic surfactants.

As the nonionic surfactant used in the present invention, a compound represented by the general formula (1) is preferable.

R ¹ -X- (AO) _m -Y (1) wherein R ¹ represents a straight-chain or branched alkyl or alkenyl group having 6 to 22 carbon atoms, or a straight-chain or branched The aryl group which may be substituted by a C1-C18 alkyl group of the chain is shown. X represents -O- or -COO-. A
Represents a linear or branched alkylene group having 2 to 3 carbon atoms, and m A's may be the same or different. Y represents H or an alkyl group having 1 to 3 carbon atoms. m has an average of 3
Indicates a number of ~ 50. In the general formula (1), the group A represents an ethylene group or a propylene group (preferably a branched propylene group), which may be polymerized in a block type or a random type.

The anionic surfactant used in the present invention includes alkyl sulfates, alkyl ether sulfates, alkyl benzene sulfonic acids or salts thereof, alkane sulfonic acids or salts thereof, saturated or unsaturated fatty acid salts, alkyl and sulfonic acids, and salts thereof. Alkenyl ether carboxylate, α-sulfofatty acid salt, α-sulfofatty acid ester and the like can be mentioned. Among them, alkylbenzenesulfonic acid or a salt thereof is particularly preferable.

The content of the component (b) in the composition of the present invention is 1
-50% by weight, preferably 1.5-30% by weight, more preferably 2-20% by weight. If the content of the component (b) is less than 1% by weight, not only does the bleaching detergency deteriorate, but also the stability of the perfume decreases. The fragrance is basically an oil component, and is therefore solubilized by the surfactant in the presence of the component (b). If the content of the component (b) is less than 1% by weight, it is presumed that the solubilization is not sufficient and the stability of the fragrance is reduced. The content of the component (b) is 50% by weight.
If the ratio exceeds the above range, the viscosity of the liquid bleach composition will increase remarkably, causing a problem that it is difficult to handle.

[Component (c)] The composition of the present invention contains, as the component (c), a chelating agent having a calcium chelating constant (pKca) of 4 or more, preferably 4.5 or more, more preferably 5 or more. Here, pKca means a 0.1% by weight solution of a chelating agent using a calcium ion electrode, pH 10, 25 ° C., 0.1M N
This is a value measured using an H ₄ Cl—NH ₄ OH buffer. This p
When a chelating agent having a Kca of less than 4 is used, the stability of the fragrance is significantly reduced.

Specific examples of the chelating agent used as the component (c) of the present invention include amino acid chelating agents such as ethylenediaminetetraacetic acid, nitrilotriacetic acid, and hydroxyethyliminodiacetic acid, and 1-hydroxyethylidene-1,1-.
Phosphonic acid chelating agents such as diphosphonic acid, ethanehydroxy-1,1,2-triphosphonic acid, ethane-1,2-dicarboxy-1,2-diphosphonic acid, methanehydroxyphosphonic acid, acrylic acid / maleic acid copolymer, etc. And polyphosphoric acid-based chelating agents such as tripolyphosphoric acid. Among these, phosphonic acid-based chelating agents and carboxylic acid-based chelating agents are particularly excellent.

The content of the component (c) in the composition of the present invention is as follows:
It is 0.5 to 2% by weight, preferably 0.7 to 2% by weight, more preferably 0.7 to 1.5% by weight. Thus, in the present invention, the object can be achieved by blending a chelating agent having a high pKca of 4 or more, and the content of the component (c) is reduced.
If the content is outside the range of 0.5 to 2% by weight, the aroma stability cannot be satisfied.

[Component (d)] The composition of the present invention contains at least 10% by weight, preferably 10% by weight, of a fragrance component having at least one functional group unstable to hydrogen peroxide in the molecule as the component (d).
It contains a perfume composition containing 10 to 90% by weight, more preferably 20 to 90% by weight.

When the content of the fragrance component having a functional group unstable to hydrogen peroxide in the fragrance composition is less than 10% by weight, the design of the fragrance is significantly restricted. Examples of the functional group unstable to hydrogen peroxide include an amino group, an ester group and an aldehyde group. The following compounds can be given as specific examples of such a fragrance component having a functional group unstable to hydrogen peroxide.

N-Heptyl aldehyde (n-Heptyl aldehy
de), n-octyl aldehyde, n
-Nonyl aldehyde (n-Nonyl aldehyde), n-decyl aldehyde (n-Decyl aldehyde), n-Undecyl aldehyde (n-Undecyl aldehyde), undecylenaldehyde (Und
ecylenic aldehyde), dodecylical
dehyde), Methyl nonylacetaldehyde
acetaldehyde), n-tridecylaldehyde (n-Tridec
yl aldehyde), n-tetradecyl aldehyde (n-Tetrad
ecyl aldehyde), n-hexadecyl aldehyde (n-Hexa
decyl aldehyde), 2,6-Nonadienal (2,6-Nonadien
al), Citral, Citronella (Citronella)
l), Hydroxycitronella (Hydroxycitronella)
l), Perilla aldehyde, Benzaldehyde, Phenylacetaldehyde (Phe
nylacetaldehyde), phenylpropyl aldehyde (3-Phe
nylpropionic aldehyde), p-tolyl aldehyde (p-Tol
ylaldehyde), p-tolylacetaldehyde (p-Tolyl a
cetaldehyde), cinnamic alde
hyde), α-amylcinnamic aldehyde (α-n-Amy
l cinnamic aldehyde), α-n-Hexyl cinnamic aldehyde, anisaldehyde, cuminal aldehyde
de), Heliotropine, Cyclamen aldehyde, p-tert-butyl-α-
Methylhydrocinnamic aldehyde (lilyal) [p
-tert-Butyl-α-methyl hydrocinnamic aldehyde ("Lili
al ")], Salicylic aldehyde, Vanillin, Ethyl vanillin,
γ-Undecalactone, ethyl phenylglycidate (Ethyl methyl phenyl glycida)
te), γ-Nonyllactone, ethyl p-methyl-β-phenylglycidate (Ethyl-p-methyl-
β-phenyl glycidate), allyl caproate
ate), allyl caprylate, 4- (4
-Hydroxy-4-methylpentyl) -3-cyclohexene-1-carboxaldehyde (laral) [4- (4-Hy
droxy-4-methylpentyl) -3-cyclohexen-1-carboxaldehyd
e ("Lyral")], citronellyloxyacetaldehyde (C
itronellyl oxyacetaldehyde), coumarin,
Cyclopentadecanolide, Ambrettolide, Cyclohexadecanolide
(Cyclohexadecanolide), ethylene brush rate (Ethyl
ene brassylate), 12-oxahexadecanolide (12-Ox
ahexadecanolide), 11-oxahexadecanolide (11-Ox
ahexadecanolide), 10-oxahexadecanolide (10-Ox
ahexadecanolide), geranyl formate (Geranyl formate),
Benzyl formate, phenylethyl formate (P
henylethyl formate), ethyl acetate (Ethyl acetate),
Isoamyl acetate, citronellyl acetate
(Citronellyl acetate), Geranyl acetate
te), linalyl acetate, menthyl acetate
(l-Mentyl acetate), Bornyl acetate (l-Bornyl acetat
e), Terpinylacetate, benzyl acetate
(Benzyl acetate), phenylethyl acetate (β-Phenyleth
yl acetate), Cinnamyl acetate, Methyl phenyl carbinyl acetate
acetate), Anisyl acetate, Paracresyl acetate (p-Cresyl acetate), Isoeugenol acetate (Iso
eugenol acetate), myrcenyl acetate
e), ceryl acetate (Cedryl acetate), tertiary butyl cyclohexyl acetate (p-tert-Butyl cyclohexyl acetate),
Dihydroterpinylacetate,
Ethyl propionate (Ethyl propionate), isoamyl propionate (Isoamyl propionate), citronellyl propionate (Citronellyl propionate), linalyl propionate (Linalyl propionate), geranyl propionate (Geranyl
yl propionate), terpinyl propionate (Terpinyl pr
opionate), benzyl propionate (Benzyl propionat)
e) Cinnamyl propionate
, Ethyl butyrate (Ethyl butyrate), isoamyl butyrate (Isoa
myl butyrate), geranyl butyrate (geranyl butyrate), linalyl butyrate (Linalyl butyrate), linalyl isobutyrate (Lin
alyl isobutyrate), citronellyl butyrate (Citronellyl b
utyrate), citronellyl isobutyrate (Citronellyl isobuty)
rate), benzyl butyrate (Benzyl butyrate), benzyl isobutyrate (Benzyl isobutyrate), n-propyl isovalerate
(n-Propyl isovalerate), isoamyl isovalerate (Isoam
yl isovalerate), geranyl isovalerate (Geranyl isova)
lerate), cinnamyl isovalerate (Cinnamyl isovalerat)
e), ethyl caproate (Ethyl caproate), isoamyl caproate (Isoamyl caproate), citronellyl caproate
(Citronellyl caproate), ethyl caprylate (Ethyl cap
rylate), Methyl heptin c
arbonate), Ethyl heptin carboxylate
carbonate), methyl octin carboxylate
cabonate), ethyl pyruvate (Ethyl pyruvate), ethyl acetoacetate (Ethyl acetoacetate), ethyl levulinate
(Ethyl levulinate), methyl β-methylthiopropionate (Methy β-methyl-thiopropionate), methyl benzoate (Methyl benzoate), ethyl benzoate (Ethyl benzoat)
e), isobutyl benzoate (Isobutyl benzoate), isoamyl benzoate (Isoamyl benzoate), geranyl benzoate (G
eranyl benzoate), linalyl benzoate
e), benzyl benzoate (Benzyl benzoate), phenylethyl benzoate (Phenylethyl benzoate), methyl phenylacetate (Methyl phenylacetate), ethyl phenylacetate (Eth
yl phenylacetate), isobutyl phenylacetate (Isobuty
l phenylacetate), isoamyl phenylacetate (Isoamyl p
henylacetate), Geranyl phenylacetate (Geranyl pheny)
lacetate), Benzyl phenylacet
ate), methyl cinnamate, ethyl cinnamate
(Ethyl cinnamate), benzyl cinnamate (Benzyl cinnamat)
e), Cinnamyl cinnamate, dimethyl phthalate, diethyl phthalate (Die
thyl phthalate), Methyl salicyla
te), ethyl salicylate (Ethyl salicylate), isobutyl salicylate (Isobutyl salicylate), isoamyl salicylate (Isoamyl salicylate), benzyl salicylate (Ben
zyl salicylate), phenylethyl salicylate (Phenyle
thyl salicylate), methyl anisate (Methyl anisate),
Ethyl anisate, methyl anthranilate, ethyl anthranilate
yl anthranilate), methyl methyl anthranilate (Methy
l methylanthranilate), methyl jasmonate (Methyl
jasmonate), methyl dihydrojasmonate (Methyl dihy
drojasmonate), Indole, Skatole (Ska
tole), 6-methylquinoline, 6
-Methyltetrahydroquinoline
inoline), 7-methylquinoline,
6-Isopropyl quinoline,
Isobutyl quinoline.

The chemical names and common names of the aroma components described here are described in “The Chemicals of Fragrances” edited by The Chemical Society of Japan, Ryoichi Akahoshi, Industrial Chemistry Series, Dai Nippon Tosho Co., Ltd., 1st edition, pp. 141-210. It is described according to the name.

The fragrance component having at least one functional group unstable to hydrogen peroxide in the fragrance composition of the present invention reacts with hydrogen peroxide during storage when it is blended with the liquid bleach composition to cause a decomposition reaction. Cause For example, a compound having an ester group undergoes hydrolysis or hydrogen peroxide decomposition, and a compound having an aldehyde group is oxidized to change into carboxylic acids. The amine compound also undergoes an oxidation reaction to produce an amine oxide. This causes a change in fragrance during storage, which significantly reduces the value of the product.

In order to suppress this, in the present invention, a specific chelating agent is blended in a specific amount, and the composition 10
By adjusting the amount of the N / 10 NaOH aqueous solution necessary to bring 00 ml to pH 6.0 to a specific amount or more, the liquid bleach composition was provided with a buffering ability and the perfume stability was improved. .

The content of the component (d) in the composition of the present invention is
0.001 to 5% by weight is preferred, and 0.01 to 1% by weight is particularly preferred. If the content of the component (d) is less than 0.001% by weight, it is not preferable in terms of palatability, and if it exceeds 5% by weight, it is economically disadvantageous.

The liquid bleach composition of the present invention comprises
50ml of N / 10 NaOH aqueous solution required to bring the pH to 6.0
Or more, preferably 80 ml or more, more preferably 80 to 1000 ml
It is adjusted to become. If not adjusted in this way, the stability of the perfume will be significantly reduced. For such adjustment, an acidic substance is added as necessary.

The acidic substances used here include the following.

Acetic acid, propionic acid, butanoic acid, hexanoic acid, octanoic acid, decanoic acid, dodecanoic acid, tetradecanoic acid, hexadecanoic acid, octadecanoic acid, glycolic acid, lactic acid, succinic acid, citric acid, fumaric acid, benzoic acid, salicylic acid Organic carboxylic acids such as phthalic acid, terephthalic acid, and trimetic acid; percarboxylic acids such as dodecane diperacid, monoperphthalic acid; and homopolymers or copolymers obtained from unsaturated carboxylic acids such as acrylic acid, methacrylic acid, and maleic acid. Polycarboxylic acids alkyl sulfate, alkyl ether sulfate, α-sulfofatty acid, α-sulfofatty acid ester,
Organic sulfonic acids and organic sulfates such as alkylbenzenesulfonic acid, p-toluenesulfonic acid and p-hydroxyphenylsulfonic acid 1-hydroxyethylidene-1,1-diphosphonic acid,
Ethanehydroxy-1,1,2-triphosphonic acid, ethane-
Phosphonic acids such as 1,2-dicarboxy-1,2-diphosphonic acid and methanehydroxyphosphonic acid Inorganic acids such as sulfuric acid, phosphoric acid, hydrochloric acid, polyphosphoric acid, nitric acid and silicic acid Among these acidic substances, and It is also effective as a chelating agent for the component (c) or as an anionic surfactant for the component (b). Of these, is particularly preferable.

[Optional Components] The composition of the present invention may further contain a bleaching activator as component (e). Examples of the bleach activator include O-acetylated compounds represented by glucose pentaacetate and the like, N-acylated compounds represented by tetraacetylethylenediamine, acid anhydrides represented by maleic anhydride, and the like. Alkanoyloxybenzenesulfonates exemplified in JP-B-63-12520 and JP-A-6-316700, JP-A-63-233969, JP-A-63-31566, and JP-A-64-316700. Bleaching activators which react with hydrogen peroxide to produce an organic peracid having a quaternary ammonium group, as disclosed in JP-A-68347 and JP-A-1-190654, can be mentioned.

Among these bleach activators, compounds represented by the general formula (2) are preferred.

[0030]

Embedded image

[Wherein, R ² represents an alkyl group or alkenyl group having 5 to 19 carbon atoms, Z represents —SO ₃ M or —COOM, and M represents H or an organic or inorganic cation. In the general formula (2), R ² is preferably an alkyl group having 5 to 14 carbon atoms, and M is preferably H 2, sodium or potassium.

More preferred compounds among the bleaching activators represented by the general formula (2) include the following.

[0033]

Embedded image

The liquid bleach composition of the present invention may contain a cationic surfactant as an optional component. Preferred examples of the cationic surfactant include a compound represented by the general formula (3)
And a quaternary ammonium compound represented by the following formula:

[0035]

Embedded image

[In the formula, at least one of R ^{3 to} R ⁶ is an alkyl group or alkenyl group having 6 to 20 carbon atoms, and the rest is an alkyl group or hydroxyalkyl group having 1 to 3 carbon atoms. Y represents an organic or inorganic anion. As specific examples of these, the following formula (3-1) or (3-
The compound represented by 2) is mentioned.

[0037]

Embedded image

Wherein h is a number from 6 to 20, and R ⁷ is a
3 alkyl group, Z ^- is halogen anion, an alkyl sulfate anion or a fatty acid anion. ]

[0039]

Embedded image

Wherein d and g are the same or different and
The number 20, R ⁷ and Z ^- have the meaning given above. Among them, dioctyl dimethyl ammonium salt,
Didecyl dimethyl ammonium salt, didodecyl dimethyl ammonium salt, didecyl methyl ethyl ammonium salt and the like are particularly preferred.

[0041]

According to the present invention, it is possible to provide a liquid bleach composition which does not cause a change in aroma during storage and does not decompose hydrogen peroxide.

[0042]

EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these examples.

Examples 1 to 6 and Comparative Examples 1 to 11 Hydrogen peroxide as the component (a) and the following (b-
1) to (b-2), the following (b'-
The following (c-1) to (c-3) as the components (1) and (c) and the chelating agents (c'-1) to (c'-2) and (d) as the comparative chelating agents shown in Table 1 Perfume compositions (d-1) to (d-3) according to the invention and comparative perfume compositions (d'-1) to (d'-4), (e) as components (e-1) to (e)
-2) and the following (f-1) to (f-2) as acidic substances, liquid bleach compositions having the compositions shown in Tables 2 to 4 were prepared. The obtained liquid bleach composition was evaluated for hydrogen peroxide stability and aroma stability by the following methods. Table 2 shows the results
To Table 4 below.

(B) Component Polyoxyethylene (average number of moles of added EO: 8) alkyl (C ₁₂ ) ether (b-1) (Nonionic surfactant manufactured by Kao Corporation, trade name: Emulgen 108) Alkyl (C ₁₂ ) ) Benzenesulfonic acid (b-2) (b ') component (cationic surfactant)

[0045]

Embedded image

(C) Component Nitrilotriacetic acid (pKca = 6.6) (c-1) Acrylic acid / maleic acid copolymer (c-2) (Molecular weight 70,000, monomer molar ratio = 7/3, pKca = 5.0) 1-hydroxyethylidene-1,1-diphosphonic acid (c-3) (manufactured by Nippon Monsanto, trade name Diquest 2010cs)

[0047]

Embedded image

Component (c ′) (comparative chelating agent) sodium polyacrylate (molecular weight 8000, pKca = 3.2) (c′-1) sodium citrate (pKca = 3.2) (c′-2) (d) component (Fragrance composition of the present invention) and component (d ') (comparative flavor composition)

[0049]

[Table 1]

Note) * 1: A fragrance component having at least one functional group unstable to hydrogen peroxide in the molecule * 2: A fragrance component having no functional group unstable to hydrogen peroxide in the molecule (e) Ingredient

[0051]

Embedded image

(F) Component (acidic substance) Sulfuric acid (f-1) Phosphoric acid (f-2) <Stability of hydrogen peroxide> Liquid bleach before storage and after storage under the conditions shown in Tables 2-4 The composition was titrated with a 1 / 10N potassium permanganate solution to measure the available oxygen concentration. The stability of hydrogen peroxide was determined by the following equation.

[0053]

(Equation 1)

<Aroma Stability> The liquid bleach compositions shown in Tables 2 to 4 were sealed and stored in a plastic container and left at 40 ° C. for 20 days. Subsequent changes in fragrance were evaluated on a 5-point scale according to the following criteria.

5: Almost no change is observed 4: Slight change is observed 3: Case where change is observed 2: Case where considerable change is observed 1: Case where significant change is observed

[0056]

[Table 2]

[0057]

[Table 3]

[0058]

[Table 4]

Note) * 1: N / 10 necessary to make 1000 ml of the composition to pH 6.0
Amount of NaOH aqueous solution

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location C11D 17/08 C11D 17/08 D06L 3/02 D06L 3/02

Claims (8)

[Claims] (1) 1 to 7% by weight of hydrogen peroxide or an inorganic peroxide that generates hydrogen peroxide in an aqueous solution; and (b) at least one selected from nonionic surfactants and anionic surfactants. 1% to 50% by weight of one surfactant. (C) 0.5 to 2% by weight of a chelating agent having a calcium chelating constant (pKca) of 4 or more. (D) A functional group which is unstable to hydrogen peroxide in the molecule. It contains 0.001 to 5% by weight of a fragrance composition containing 10% by weight or more of at least one fragrance component, and the N / 10 NaOH aqueous solution required to make 1000 ml of the liquid bleach composition to pH 6.0 becomes 50 ml or more. An acidic liquid bleach composition, wherein the composition is adjusted to: 2. The liquid bleach composition according to claim 1, wherein the nonionic surfactant is a compound represented by the general formula (1). R ¹ -X- (AO) _m -Y (1) wherein R ¹ represents a linear or branched alkyl group or alkenyl group having 6 to 22 carbon atoms, or a linear or branched carbon group An aryl group which may be substituted with an alkyl group of the formulas 1 to 18 is shown. X represents -O- or -COO-. A
Represents a linear or branched alkylene group having 2 to 3 carbon atoms, and m A's may be the same or different. Y represents H or an alkyl group having 1 to 3 carbon atoms. m has an average of 3
Indicates a number of ~ 50. ] 3. The liquid bleach composition according to claim 1, wherein the anionic surfactant is an alkyl benzene sulfonic acid or a salt thereof. 4. The liquid bleaching composition according to claim 1, wherein an aqueous solution of N / 10 NaOH necessary for adjusting 1000 ml of the composition to pH 6.0 is adjusted to 80 ml or more. Stuff. 5. The liquid bleaching composition according to claim 1, wherein in the component (d), the functional group unstable to hydrogen peroxide is an amino group, an ester group or an aldehyde group. . 6. The liquid bleach composition according to claim 1, further comprising a bleach activator as the component (e). 7. The liquid bleach composition according to claim 6, wherein the bleach activator is a compound represented by the general formula (2). Embedded image [Wherein, R ² represents an alkyl group or alkenyl group having 5 to 19 carbon atoms, Z represents —SO ₃ M or —COOM, and M represents H or an organic or inorganic cation. ] 8. The liquid bleach composition according to claim 1, further comprising a cationic surfactant.