JPH11217589A - Aqueous composition of peracid precursor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an aqueous composition capable of improving the stability of a peracid precursor in an aqueous solution without damaging the reactivity when generating the organic peracid and capable of keeping enough bleachability by including the specific precursor and a specified surfactant. SOLUTION: The objective composition comprises (A) 0.01-60 wt.% peracid precursor capable of reacting with hydrogen peroxide in an aqueous alkaline solution and generating an organic peracid and (B) 0.01-60 wt.% betaine type amphoteric surfactant of the formula [R<1> is a liner or branched 1-50C alkyl (substituted with OH), an acyl, an aryl, an alkenyl, an alkoxy or the like;l R<2> is a linear or branched 1-8C alkylene (substituted with OH and interrupted with a carbocyclic ring); R<3> and R<4> are each a linear or branched 1-18C alkyl (substituted with OH), an acyl, an alkoxyl or the like; R<5> is a linear or branched 1-8C alkylene (substituted with OH and interrupted with a carbocylic ring; (p) is 0 or 1>=; X is sulfo or carboxyl].

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aqueous peracid precursor composition which enhances the stability of a peracid precursor in an aqueous solution and has high reactivity during an organic peracid generation reaction. The present invention also relates to a bleaching composition for a hard body having excellent bleaching performance and particularly suitable as a mold remover.

[0002]

BACKGROUND OF THE INVENTION Peracid precursors are widely used as components of bleaching agents in order to improve bleaching performance. However, when the peracid precursor is held as an aqueous solution, the peracid precursor is hydrolyzed in the aqueous solution, so that the concentration of the peracid precursor decreases with time. Further, when a storage stabilizer is added to prevent this hydrolysis, the reactivity when the peracid precursor is reacted with hydrogen peroxide in an alkaline aqueous solution is not always sufficient.

[0003] The present invention relates to an aqueous peracid precursor composition which can enhance the stability of a peracid precursor in an aqueous solution and ensure sufficient bleaching performance without impairing the reactivity during the production of an organic peracid. The purpose is to provide. Another object of the present invention is to provide a bleaching composition for a hard body which has excellent bleaching performance and is particularly suitable as a mold remover.

[0004]

Means for Solving the Problems The present inventors have found that a specific betaine-type amphoteric surfactant suppresses the decomposition of a peracid precursor in an aqueous solution and does not impair the reactivity during the production of an organic peracid. And completed the present invention.

That is, the present invention provides (a) a peracid precursor which reacts with hydrogen peroxide in an aqueous alkali solution to produce an organic peracid, and (b) a general formula (1):

[0006]

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[Wherein, R ¹ is a linear or branched C1-C50 alkyl, acyl, aryl, alkenyl, alkoxyl or C1-C5 alkyl group which may be substituted with a hydroxyl group; A phenyl group or a benzyl group which may be substituted with an alkyl group of 8; R ² may have a straight-chain or branched carbon atom which may be substituted with a hydroxyl group and may be interrupted by a carbocyclic ring; ~ 8 alkylene groups;
R ³ and R ⁴ may be the same or different, and may be a straight-chain or branched-chain alkyl group having 1 to 18 carbon atoms which may be substituted with a hydroxyl group, an acyl group, an aryl group, an alkenyl group or an alkoxyl group; A phenyl group which may be substituted with an alkyl group having 1 to 8 carbon atoms, a benzyl group which may be substituted with an alkyl group having 1 to 8 carbon atoms, or an alkyl group having 1 to 50 carbon atoms having an average addition mole number of 1 to 50; An alkylene oxide group, wherein when R ³ and R ⁴ are alkylene oxide groups, the added alkylene groups may be the same or different, and the sequence is arbitrary; R ⁵ may be substituted with a hydroxyl group; ,
A linear or branched alkylene group having 1 to 8 carbon atoms which may be interrupted by a carbocyclic ring; p represents 0 or an integer of 1 or more; X ^- represents a sulfo group or a carboxyl group. ]
It is intended to provide a peracid precursor aqueous composition comprising a betaine-type amphoteric surfactant represented by the formula:

Further, the present invention provides a bleaching agent composition for a hard body, comprising the above aqueous composition of a peracid precursor and (c) hydrogen peroxide or a component which produces hydrogen peroxide in an aqueous solution. It provides things.

In the present invention, the term "aqueous composition" means an aqueous solution containing a peracid precursor or a dispersion containing a peracid precursor.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The peracid precursor of the component (a) used in the aqueous peracid precursor composition of the present invention is one which reacts with hydrogen peroxide in an aqueous solution to form an organic peracid. There is no particular limitation. Examples of the peracid precursor of the component (a) include a compound represented by the general formula (2): R ⁶ —C (＝ O) -L (2) [wherein, R ⁶ is a straight-chain or branched-chain carbon atom having 4 carbon atoms. To 18 alkyl groups, aryl groups, alkenyl groups, acyl groups or the following general formula (3):

[0011]

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(Wherein R ⁷ is a hydrogen atom, having 1 to 1 carbon atoms)
8 represents a linear or branched alkyl group, alkenyl group, or acyl group; R ⁸ represents a linear or branched alkylene group having 1 to 8 carbon atoms; q represents 0 or 1; ⁹ is
A linear or branched alkylene group having 1 to 8 carbon atoms or a phenylene group which may be substituted with a linear or branched alkyl group having 1 to 5 carbon atoms;
Represents a linear or branched alkylene group of 4 to 4; n is an average number of moles of alkylene oxide added, and represents a number of 0 to 100, and n A's may be the same or different) L represents the following general formulas (4), (5),
(6) or (7):

[0013]

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(Wherein M represents a hydrogen atom or an alkali metal atom; R ¹⁰ and R ¹¹ represent a linear or branched alkylene group having 1 to 8 carbon atoms) . ]
Can be mentioned.

In the general formula (2) representing the peracid precursor of the component (a), R ⁶ is a group represented by the general formula (3), and L is the general formula (4) or (5) , A combination of groups represented by the general formula (6) or the general formula (7) is preferable. Among them, those in which R ⁶ is a group represented by the general formula (3) and L is a group represented by the general formula (6) are particularly preferable.

The betaine-type amphoteric surfactant of the component (b) used in the aqueous peracid precursor composition of the present invention has the following general formula (1):

[0017]

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Wherein R ¹ is a straight-chain or branched-chain carbon atom which may be substituted by a hydroxyl group, having 1 to 50, preferably 1 to 50.
23 alkyl group, an acyl group, an aryl group, an alkenyl group, an alkoxyl group or an alkyl group optionally substituted by a phenyl group or benzyl group having 1 to 8 carbon atoms; R ² is substituted with a hydroxyl group, a carbon A linear or branched alkylene group having 1 to 8 carbon atoms which may be interrupted by a ring; R ³ and R ⁴ may be the same or different, and may be a linear chain which may be substituted with a hydroxyl group; Or 1 carbon atom in the branched chain
Alkyl group, acyl group, aryl group, alkenyl group, alkoxyl group,
A phenyl group which may be substituted with an alkyl group of 8; a benzyl group which may be substituted with an alkyl group having 1 to 8 carbon atoms; or an alkylene oxide group having 1 to 50 carbon atoms and an average addition mole number of 1 to 50. And when R ³ and R ⁴ are alkylene oxide groups, the alkylene groups to be added may be the same or different and the sequence is arbitrary; R ⁵ is substituted with a hydroxyl group and interrupted by a carbocyclic ring. Represents a linear or branched alkylene group having 1 to 8 carbon atoms; p is 0 or 1
X ^- represents a sulfo group or a carboxyl group. ].

Examples of the betaine-type amphoteric surfactant represented by the general formula (1) include N-lauryl-N, N-dimethyl (2-hydroxypropyl) sulfobetaine and N-stearyl-N, N-dimethylcarboxybetaine. , N-lauryl-N, N-dihydroxyethylcarboxybetaine, N-lauroylamidopropyl-N, N-dimethylcarboxybetaine and the like.

The content of the components (a) and (b) in the aqueous peracid precursor composition enhances the stability of the component (a),
In the aqueous peracid precursor composition, the component (a) is preferably contained in an amount of 0.1 to increase the reactivity during the production of the organic peracid.
01 to 60% by weight, particularly preferably 0.1 to 40% by weight
The component (b) is preferably 0.01 to 60% by weight, particularly preferably 0.1 to 40% by weight. Also,
When components other than the components (a) and (b) are blended in the aqueous peracid precursor composition, the total content of the components (a) and (b) is preferably 80% by weight or less, particularly preferably. It is 60% by weight or less.

The aqueous peracid precursor composition of the present invention may further contain a surfactant in order to improve the bleaching detergency. Surfactants include fatty acid salts, alkyl sulfates, alkylbenzene sulfonates, polyoxyethylene alkyl sulfates, sulfosuccinate diesters, alkyl diphenyl ether disulfonates, alkane sulfonates, alkyl phosphates, α- Anionic surfactants such as olefin sulfates and α-olefin sulfonates; non-ionic surfactants such as polyoxyethylene alkyl ethers, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene fatty acid esters, fatty acid monoglycerides, alkyl glycosides, etc. Ionic surfactants: monoalkyltrimethylammonium salt, dialkyldimethylammonium salt, trialkylmethylammonium salt, tetraalkylammonium salt, alkylbenzen Cationic surfactants such as zyldimethylammonium salt; one or more selected from amphoteric surfactants such as alkyldimethylamine oxide, alkylamidopropyldimethylamine oxide, sodium laurylaminopropionate, and imidazolinium betaine. Can be. The amount of the surfactant is preferably 0.01 to 30% by weight, particularly preferably 0.1 to 30% by weight, in the aqueous peracid precursor composition.
05 to 20% by weight.

The aqueous peracid precursor composition of the present invention may further contain a water-soluble solvent in order to improve bleaching detergency and storage stability. Examples of the water-soluble solvent include ethanol, propanol, propylene glycol, propylene glycol monomethyl ether, propylene glycol monobutyl ether, butyl diglycol, phenoxyethanol, a compound obtained by adding an alkylene oxide to phenol, N-alkylpyrrolidone, and 3-methoxy-3-methyl. One or more selected from -1-butanol, isoprene glycol and the like can be mentioned. The amount of the water-soluble solvent in the aqueous peracid precursor composition,
Preferably it is 0.01 to 40% by weight, particularly preferably 0.1 to 30% by weight.

The aqueous peracid precursor composition of the present invention has a pH
In order to maintain and control the decomposition of the peracid precursor, an organic acid can be further added. Examples of the organic acid include one or more selected from citric acid, succinic acid, malic acid, fumaric acid, tartaric acid, malonic acid, trimellitic acid, pyromellitic acid, and the like. The amount of the organic acid in the aqueous peracid precursor composition is preferably from 0.01 to
30% by weight.

The aqueous peracid precursor composition of the present invention may further contain a chelating agent in order to improve the bleaching performance and suppress the decomposition of the peracid precursor. Examples of the chelating agent include one or more selected from those described in JP-A-8-209194, page 7, column 12, lines 9 to 20, and specific examples thereof include tripolyphosphoric acid, pyrophosphoric acid, and orthophosphoric acid. , Hexametaphosphoric acid and their alkali metal salts, ethylenediaminetetraacetic acid, hydroxyiminodiacetic acid, dihydroxyethylglycine, nitrilotriacetic acid, hydroxyethylenediaminetriacetic acid, diethylenetriaminepentaacetic acid, triethylenetetraminehexaacetic acid and their alkali metal salts or alkaline earth Metal salts, aminotrimethylene phosphonic acid, 1-hydroxyethylidene-
N-oxides of 1,1-diphosphonic acid, ethylenediaminetetramethylenephosphonic acid, diethylenetriaminepentamethylenephosphonic acid, aminotrimethylenephosphonic acid and their alkali metal salts or alkaline earth metal salts, poly-α-hydroxyacrylic acid and its alkali Metal salts and the like can be mentioned. The amount of chelating agent
In the aqueous peracid precursor composition, preferably 0.00
01 to 10% by weight, particularly preferably 0.001 to 10% by weight.
5% by weight.

The aqueous peracid precursor composition of the present invention may further contain a water-soluble polymer in order to improve the bleaching performance by attaching a bleaching component to the material to be treated. As the water-soluble polymer, for example, the following JP-A-8-
One or more types selected from those described in page 20, column 10, line 20 to page 7, column 11, line 3 of 209194 can be mentioned, and among them, the following (i) to (iv) are preferable.

(I) guar gum, locust bean gum,
Natural polymers derived from plants such as carrageenan, alginic acid, gum arabic and pectin; (ii) natural polymers derived from microorganisms such as xanthan gum; (iii) oxidation, methylation and carboxymethylation of cellulose, starch, cellulose or starch. A cellulose derivative or a starch derivative processed by a treatment such as hydroxyethylation, hydroxypropylation, or cationization; (iv) a polyacrylic acid homopolymer or a polyacrylic acid derivative that is a copolymer with a monomer copolymerizable with acrylic acid; Crosslinked polyacrylic acid homopolymer or polyacrylic acid derivative.

The amount of the water-soluble polymer is preferably 0.001 to 10% by weight in the aqueous peracid precursor composition.
And particularly preferably 0.01 to 5% by weight.

The aqueous peracid precursor composition of the present invention may further contain other components such as a fragrance, an antibacterial agent, a peracid stabilizer,
Conditioning agents, pigments, dyes and suspending agents can be blended.

In the aqueous peracid precursor composition of the present invention, the pH during storage is preferably 1 to 9, particularly preferably 1.5 to 8, in order to suppress the decomposition of the peracid precursor. .

The bleaching agent composition for a hard body of the present invention further comprises, as the component (c), hydrogen peroxide or a component which generates hydrogen peroxide in an aqueous solution, as the component (c). Things. Here, the `` hard body '' means a thing that retains a certain shape, regardless of whether it is planar or three-dimensional, and if it can be washed and bleached, The degree of hardness is not limited. As this hard body, plastic, rubber, metal,
In addition to fixed objects such as floors, stairs, walls, etc. made of tile, brick, concrete, cement, glass, wood, etc., include all kinds of instruments, utensils, tools, furniture, tableware, etc. that come into contact with humans. Can be. Therefore, the bleaching composition for hard body includes mold remover, floor cleaning bleach, tableware cleaning bleach, kitchen cleaning bleach, kitchen cleaning cleaning bleach, bathroom cleaning bleach, fully automatic laundry It can be used as a washing bleach for machine washing tubs, a washing bleach for drain pipes, a washing bleach for small articles in kitchens and lavatories, and is particularly suitable as a mold remover among these uses.

Among the component (c), components that generate hydrogen peroxide in an aqueous solution include sodium percarbonate, sodium tripolyphosphate / hydrogen peroxide adduct, sodium pyrophosphate / hydrogen peroxide adduct, urea / peroxide Examples include hydrogenated products, sodium sulfate / hydrogen peroxide adducts, sodium perborate monohydrate, sodium perborate tetrahydrate, sodium persilicate, sodium peroxide, calcium peroxide and the like. As the component (c), in addition to hydrogen peroxide, sodium percarbonate, sodium perborate monohydrate,
Sodium perborate tetrahydrate is preferred.

The component (c) is added in an amount of 0.01 to 30% by weight in terms of hydrogen peroxide concentration in the bleaching composition for a hard body in consideration of imparting sufficient bleaching performance and economy. Is preferable, and 0.1 to 20% by weight in terms of hydrogen peroxide concentration.
It is particularly preferred that

The bleaching composition for a hard body of the present invention is preferably adjusted to a pH of 7 to 13 during use.
It is particularly preferred to adjust to ~ 13. P within the above range
Examples of the pH adjuster for maintaining H include hydroxides of alkali metals such as sodium hydroxide and potassium hydroxide, ammonium hydroxide, amine derivatives such as mono, di and triethanolamine, sodium carbonate, potassium carbonate and the like. Alkali metal carbonates, carbonates such as ammonium carbonate,
Examples thereof include alkali metal silicates such as sodium silicate and potassium silicate, and silicates such as ammonium silicate.

When using the bleaching agent composition for a hard body of the present invention, a method of spraying or spraying with a discharge container such as a trigger spray, a squeeze container, or the like, a method of impregnating paper or cloth, and compressing. For example, a method of applying with a brush, a roller, or the like can be applied. Here, when using a discharge container such as a trigger spray, in order to enhance the adhesion to the hard body and enhance the bleaching performance, toluene sulfonic acid, xylene sulfonic acid, cumene sulfonic acid, alkenyl succinic acid, lauryl sulfuric acid or a mixture thereof. One or two or more selected from foaming aids such as alkali metal salts can be blended. The compounding amount of the foaming aid is preferably 0.01 to 20% by weight, particularly preferably 0.05 to 10% by weight, in the bleaching agent composition for a hard body.

Further, the bleaching composition for a hard body of the present invention comprises:
The aqueous peracid precursor composition and the component (c), hydrogen peroxide or a component that generates hydrogen peroxide in an aqueous solution, are kept in a non-contact state and mixed at the time of use. . The method of maintaining the non-contact state in this case is not particularly limited, and for example, a dosage form such as the following package type can be used. Is preferred. Further, at the time of use, water or warm water can be further added.

A two-pack type in which the aqueous peracid precursor composition and the component (c) are separately packaged, and optional components are mixed in one or both of the packages; an aqueous peracid precursor composition, (c) A three-pack type in which the components and optional components are separately packaged; the aqueous peracid precursor composition and the component (c) are separately packaged,
A three-part formulation in which some of the optional ingredients are mixed into one or both packages and the remainder is separately packaged.

The method of packaging is not particularly limited, and can be packaged by appropriately combining bottles and sachets. Materials for bottles and sachets include polyethylene and polypropylene, which are generally used for containers for bleaching detergents.
Examples thereof include polyamide, polyethylene terephthalate, polyvinylidene chloride, and nylon. In addition, these plastics can contain a pigment, an antistatic agent, a light-shielding agent, and an ultraviolet absorber as necessary.
The bottle or pouch can have a multilayer structure in which a resin layer is stacked or an aluminum layer is further provided, and a material in which silica, aluminum, alumina, or the like is deposited can be used. Further, a gas releasing means such as a pinhole and a check valve, a straw-like pouring means for transferring to another container, and a discharge container such as a trigger can be directly attached to the bottle.

The amount of the component (c) in the packaged bleaching composition for a hard body is preferably 0.00 in the composition in consideration of imparting sufficient bleaching performance and economical efficiency.
The content is 1 to 30% by weight, particularly preferably 0.1 to 20% by weight. The pH during use of the packaged bleach composition for a hard body is preferably adjusted to 7 to 13, and particularly preferably adjusted to 8 to 13.

[0039]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the invention is limited thereto.

Production Example 1 A 35% aqueous sodium bisulfite solution 3 was added to 100 g of water.
66 g (1.23 mol) and 10 g of a 4% aqueous sodium hydroxide solution were added, and the temperature was raised to 55 ° C. 114g there
(1.23 mol) of epichlorohydrin was added dropwise over 30 minutes. After aging for 1 hour while maintaining at about 80 ° C., 213 g (1 mol) of N-lauryl-N, N
-Dimethylamine was added dropwise over 2 hours and aged at 90 ° C for 1 hour. Thereafter, 200 g (0.2 mol) of a 4% aqueous sodium hydroxide solution was further added dropwise over 2 hours, and then aged at 100 ° C. for 1 hour to obtain N-lauryl-N, N
-Dimethyl (2-hydroxypropyl) sulfobetaine (amphoteric surfactant 1) was obtained.

Production Example 2 In 100 g of water, 285 g (1 mol) of N-stearyl-N, N-dimethylamine and 335 g (1.15 mol) were added.
l) Add 40% sodium monochloroacetate and add
The temperature rose. After aging for 30 minutes, the solution was further aged for 3 hours while maintaining the pH at about 12 with an aqueous sodium hydroxide solution to obtain N-stearyl-N, N-dimethylcarboxybetaine (amphoteric surfactant 2).

Production Examples 3 and 4 N-lauryl-N, N-dihydroxyethylcarboxybetaine (amphoteric surfactant 3) and N-lauroylamidopropyl-N, N-dimethylcarboxylate were prepared according to Production Examples 1 and 2 described above. Betaine (amphoteric surfactant 4) was obtained.

Examples 1 to 9 and Comparative Examples 1 to 7 Aqueous peracid precursor compositions (aqueous solutions) having the compositions shown in Table 1 were produced. As the component (a), the following compounds 1 to 7 were used, and as the component (b), the amphoteric surfactants 1 to 4 obtained in the above Production Examples were used. Compound 1: sodium octanoyloxybenzenesulfonate Compound 2: sodium dodecanoyloxybenzenesulfonate Compound 3: hexanoyloxybenzenecarboxylic acid

[0044]

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The pH of each aqueous peracid precursor composition was adjusted to 5 with sulfuric acid or sodium carbonate. The stability of the peracid precursor in these compositions was tested by the following method. Table 1 shows the results. In addition, the compounding amount in Table 1 is based on the total amount including water, and is represented by% by weight. (Stability of Peracid Precursor)
The residual ratio of the peracid precursor when left in a room at a temperature of 1 ° C. for one month was measured. The residual ratio of the peracid precursor was determined from the ester value obtained by measuring the acid value and saponification value of the aqueous peracid precursor composition.

[0046]

[Table 1]

As is apparent from Table 1, the combination of the component (a) and the component (b) suppressed the decomposition of the component (a) and improved the stability.

Examples 10 to 16 and Comparative Example 8 Of the components shown in Table 2, (a), (b) and optional components were packaged to obtain an I agent, and component (c) and optional components were packaged. II
In addition, for some examples, potassium carbonate was packaged to prepare a III agent to obtain a two- or three-part bleaching agent composition for a hard body. The bleaching performance of these compositions was tested by the following method. Note that the agent I was used after being left in a room at 40 ° C. for one month in a state filled in a closed polypropylene container. Immediately before the test, drug I and drug II or I
Agents II, III and III were mixed. Examples 13 to 1
In Comparative Example 6 and Comparative Example 8, water was added only to the agent I, and the agent I was used as an aqueous solution. In Examples 10 to 12, the agent I and
Water was added so that the weight of the agent II was the same, and the agents I and II were made into an aqueous solution. The blending amounts in Table 2 are based on the total amount including water, and are expressed in weight%. Dequest 2010
Is 1-hydroxyethylidene-1, manufactured by Monsanto
1-diphosphonic acid, Dequest 2015 DN
Is 1-hydroxyethylidene-1, manufactured by Monsanto
1-diphosphonic acid trisodium. Table 2 shows the results.

(Test method for bleaching performance) Inoculated with Cladosporium herbarum
A plastic plate (made of ABS resin) cultured at 0 ° C. for 14 days was prepared as a model plate. Agent I, Agent II or Agent III of each composition which had been separately packaged was mixed immediately before use (pH at the time of mixing was 10 to 11). 40 μl of this composition solution was dropped on a model plate, and left for 15 minutes.
Washed and air dried. Thereafter, the lightness (L value) was measured using a colorimeter 1001DP manufactured by NEC Corporation. The original L value of the plastic plate was 92.4, and the L value of the model plate was 65 to 75. Therefore, L
The higher the value, the higher the mold removal rate, that is, the higher the bleaching performance.

[0050]

[Table 2]

As is evident from Table 2, the compositions of the examples exhibited sufficient bleaching performance due to the action of the components (a) and (c) because the decomposition of the component (a) was suppressed. In Comparative Example 8, the decomposition rate of the component (a) was higher than that in Examples, and thus sufficient bleaching performance could not be obtained.

[0052]

The aqueous peracid precursor composition of the present invention comprises:
By the action of the betaine surfactant of the component (b),
While the decomposition of the peracid precursor of the component (a) is suppressed,
Reactivity during the production of organic peracid is not impaired. For this reason, the bleaching agent composition for a hard body containing the aqueous peracid precursor composition and the component (c) sufficiently exhibits the action of the peracid precursor of the component (a), and thus has high bleaching performance. Can be maintained.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI C11D 3/39 C11D 3/39 17/08 17/08 (72) Inventor Kazunori Tsukuda 1334 Minato 1334 Minato, Wakayama-shi, Wakayamaken Kao Corporation Inside the office

Claims (4)

[Claims] 1. A (a) peracid precursor which reacts with hydrogen peroxide in an aqueous alkali solution to produce an organic peracid, and (b) a general formula (1) shown below: [Wherein, R ¹ is a straight-chain or branched-chain alkyl group having 1 to 50 carbon atoms which may be substituted with a hydroxyl group, an acyl group, an aryl group, an alkenyl group, an alkoxyl group or a 1 to 1 carbon atom.
A phenyl group or a benzyl group which may be substituted with an alkyl group of 8; R ² may have a straight-chain or branched carbon atom which may be substituted with a hydroxyl group and may be interrupted by a carbocyclic ring; And R ³ and R ⁴ represent alkylene groups of 8 to 8;
Which may be the same or different, a linear or branched C1-C18 alkyl group which may be substituted with a hydroxyl group,
Acyl group, aryl group, alkenyl group or alkoxyl group, phenyl group optionally substituted by alkyl group having 1 to 8 carbon atoms, benzyl group optionally substituted by alkyl group having 1 to 8 carbon atoms, or average addition Represents an alkylene oxide group having 1 to 50 moles and 1 to 4 carbon atoms, and R ³ , R ⁴
Is an alkylene oxide group, the alkylene groups to be added may be the same or different, and the sequence is arbitrary;
R ⁵ represents a linear or branched alkylene group having 1 to 8 carbon atoms which may be substituted by a hydroxyl group and may be interrupted by a carbocyclic ring; p represents 0 or an integer of 1 or more X
^- represents a sulfo group or a carboxyl group. ] The aqueous peracid precursor composition characterized by containing the betaine type amphoteric surfactant represented by these. 2. The peracid precursor of the component (a) is represented by the following general formula (2): R ⁶ -C (） O) -L (2) wherein R ⁶ is a straight or branched chain An alkyl group, an aryl group, an alkenyl group, an acyl group having 4 to 18 carbon atoms, or the following general formula (3): (Wherein, R ⁷ represents a hydrogen atom, a linear or branched alkyl group, alkenyl group, or acyl group having 1 to 18 carbon atoms;
R ⁸ represents a linear or branched alkylene group having 1 to 8 carbon atoms; q represents 0 or 1; R ⁹ represents 1 to 8 carbon atoms.
A linear or branched alkylene group or a C 1-5
A represents a phenylene group which may be substituted with a linear or branched alkyl group; A represents a linear or branched alkylene group having 1 to 4 carbon atoms; L represents a group represented by the following formula (4), (5), (6) or (7): embedded image (Wherein, M represents a hydrogen atom or an alkali metal atom;
R ¹⁰ and R ¹¹ represent a linear or branched alkylene group having 1 to 8 carbon atoms). The aqueous peracid precursor composition according to claim 1, which is represented by the formula: 3. The aqueous peracid precursor composition according to claim 1, wherein (c) hydrogen peroxide or a component that generates hydrogen peroxide in an aqueous solution is maintained in a non-contact state. A bleaching composition for a hard body, characterized by: 4. A bleaching composition for a hard body, comprising: the aqueous peracid precursor composition according to claim 1 or 2; and (c) hydrogen peroxide or a component that generates hydrogen peroxide in an aqueous solution. Composition.