JPH10130693A - Thickened liquid bleaching agent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a thickened liq. bleaching agent compsn. which is excellent in storage stability and has a viscosity hardly changing with temp. SOLUTION: This compsn. contains hydrogen peroxide, a thickener, and a surfactant and has a viscosity of 10-1,000mPa.s at 30 deg.C. The thickener is a compd. having a mol.wt. of 600 or higher, a polyoxyalkylene chain and an alkyl or an alkenyl groups in the molecule, and a wt. ratio of polyoxyalkylene chain to alkyl or alkenyl group higher than 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thickened liquid bleaching composition, and more particularly, to a thickened liquid bleaching composition having excellent storage stability and having a small change in viscosity with temperature. It relates to a composition.

[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 and cannot be used for colors and patterns. Oxygen bleaching agents that do not have these disadvantages have recently become very popular because of their inherent odor.
Among these oxygen bleaching agents, sodium percarbonate and sodium perborate are used as powder bleaching agents, and hydrogen peroxide is used as a liquid oxygen bleaching agent. Things are preferred.

[0003] When a liquid bleach is used to bleach clothing,
Although it is often put directly into a washing machine, a high bleaching effect can be obtained by directly applying it to dirt. However, ordinary liquid oxygen-based bleaches have a low viscosity, so they have a problem in terms of usability such as they flow before penetrating into soil when applied to soil, and it is desired to thicken the liquid bleach. .

[0004] As a method of thickening a liquid bleach, WO
No. 94/11474 discloses a method of using two nonionic surfactants, and US Pat. No. 4,900,469 discloses a method of compounding a fatty acid. However, when these methods are applied to an acidic liquid bleach, there is a problem that the viscosity changes remarkably with a change in temperature, and it is difficult to use it in a practical use.

JP-A-2-300300 discloses an acidic concentrated liquid component using a copolymer of an unsaturated carboxylic acid and an ethylenically unsaturated monomer as a thickener. The use of a bleaching agent causes not only a large change in viscosity with temperature change, but also a bleaching activator when applied to a liquid bleaching composition containing a bleaching activator as disclosed in JP-A-6-49487. There is a problem that the decomposition of the agent is accelerated. Further, examples of the thickener include polysaccharides such as xanthan gum and galactomannangone, and cellulose derivatives such as carboxymethyl cellulose. However, such thickeners have the problem that they cause the decomposition of hydrogen peroxide during storage.

Accordingly, an object of the present invention is to provide a thickened liquid bleaching composition which has improved these conventional drawbacks, has excellent storage stability, and has a small change in viscosity with a change in temperature.

[0007]

Means for Solving the Problems As a result of intensive studies, the present inventors have found that the above object can be achieved by blending a specific polyoxyalkylene derivative as a thickener, and have completed the present invention. Was.

The present invention contains hydrogen peroxide, a thickener and a surfactant, and has a viscosity at 30 ° C. of 10 to 1,000 cp, that is,
A thickened liquid bleach composition having a viscosity of 10 to 1,000 mPas, wherein the thickener is a compound having a polyoxyalkylene chain and an alkyl or alkenyl group in the molecule and having a molecular weight of 600 or more, Wherein the weight ratio of the polyoxyalkylene chain to the alkyl group or alkenyl group is polyoxyalkylene chain / alkyl group or alkenyl group> 2. is there.

According to the present invention, it is possible to provide a thickened liquid bleaching composition which is excellent in storage stability and has a small change in viscosity with a change in temperature. Specifically, according to the present invention, when the temperature is changed from 20 ° C. to 30 ° C., a rate of change in viscosity calculated by the following formula is 0.60 or less, and preferably a liquid bleach composition having a viscosity of 0.50 or less is provided. can do.

[0010]

(Equation 2)

[0011]

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

The liquid bleach composition of the present invention contains hydrogen peroxide as an essential component. Hydrogen peroxide content is 1-10
% By weight, more preferably 1 to 6% by weight.

In the present invention, as a thickener, a polyoxyalkylene chain and an alkyl or alkenyl group in the molecule have a molecular weight of at least 600, preferably 1,000 to 30,000.
And the weight ratio of the polyoxyalkylene chain to the alkyl group or alkenyl group in the molecule is such that the polyoxyalkylene chain / alkyl group or alkenyl group (hereinafter, this value is abbreviated as E)> 2, preferably E > 5 compounds are used.

If the molecular weight of the thickener is less than 600, an appropriate viscosity cannot be obtained, and if the value of E is 2 or less, an appropriate viscosity cannot be obtained.

Preferred examples of such a thickener include compounds represented by the general formula (1).

R ¹ -X- (C ₂ H ₄ O) _n- (CO) _p -R ² (1) wherein R ¹ is a linear or branched alkyl group or alkenyl having 10 to 20 carbon atoms R ² represents H or a linear or branched alkyl or alkenyl group having 10 to 20 carbon atoms, and X represents -O-, -COO-, -NR ³ -or -CONR ^3-
Is shown. Here, R ³ is H or an alkyl group having 1 to 3 carbon atoms,
It represents a hydroxyalkyl group or a polyoxyalkylene group. p is 0 or 1, and p is 0 when R ² is H ² . N is a number having an average value of 20 to 500.
R ¹ , R ² and n are selected such that the molecular weight and the weight ratio of the polyoxyalkylene chain to the alkyl group or alkenyl group in the molecule fall within the above ranges. Among these compounds represented by the general formula (1), R ¹ is an alkyl group having 10 to 20 carbon atoms, R ² is H or an alkyl group having 10 to 20 carbon atoms, and X is —O— or —COO. And n are preferably from 30 to 500, particularly preferably from 30 to 300.

Another preferred example of the thickener of the present invention is a compound represented by the general formula (1 '), which is an addition product of a diepoxide and an alcohol.

R ¹ -X- (C ₂ H ₄ O) _a -Y-[(C ₂ H ₄ O) _b -XR ¹ ] _q (1 ′) wherein R ¹ and X are as defined above. A and b are the same or different and have an average value of 20 to 500, and q is 0 to 3
And Y represents a group derived by ring opening of the diepoxide. In the above formula (1 ′), the group derived from the ring-opening of the diepoxide represented by Y 1 includes butane diepoxide,
Examples include groups derived from ring-opening of diepoxide such as hexane diepoxide and vinylcyclohexene diepoxide.

In these compounds represented by the general formula (1 ′), R ¹ is an alkyl group having 10 to 20 carbon atoms, and X is —O— or
-COO-, Y is a group derived from the ring-opening of butane diepoxide, hexane diepoxide or vinylcyclohexene diepoxide, and a and b are the same or different, and 30 to 500
In particular, those having a number of 30 to 300 and q being 1 to 2 are preferable.

Specific examples of the thickener used in the present invention include Emanone 3115 (polyoxyethylene monostearate, molecular weight 825, E = 2.1) and Emanone 3130 (polyoxyethylene monostearate) manufactured by Kao Corporation. , Molecular weight 1500, E = 5.8), Emanone 3170 (polyoxyethylene monostearate, molecular weight 3300, E = 1
3), Emanone 3199 (polyoxyethylene monostearate, molecular weight 7000, E = 27), Emanone 111
2 (polyoxyethylene monolaurate, molecular weight 640,
E = 3.5), Emanone 1210 (polyoxyethylene monolaurate, molecular weight 810, E = 4.5), Emanone 32
99 (polyoxyethylene distearate, molecular weight 850
0, E = 17), Emulgen 2200 (polyoxyethylene cetyl ether, molecular weight 7,000, E = 31), Emulgen 220 (polyoxyethylene cetyl ether, molecular weight 8)
00, E = 3.5), Emulgen 3200 (polyoxyethylene stearyl ether, molecular weight 6000, E = 24), bissurf S (addition reaction product of Emulgen 3200 with vinylcyclohexene diepoxide, molecular weight 10,000 to 20,000, E
> 30), bissurf CT (addition reaction product of Emulgen 2200 with vinylcyclohexene diepoxide, molecular weight 2)
0,000 to 30,000, E> 30).

The thickener used in the present invention as described above includes
A compound having a polyoxyalkylene chain and an alkyl or alkenyl group in the molecule, in which the number of moles of the polyoxyalkylene added to the alkyl or alkenyl group is large. Therefore, suppress the decomposition of hydrogen peroxide during storage, thereby improving the storage stability of the bleach composition,
A change in viscosity due to a change in temperature can be reduced.

Such a thickener is present in the liquid bleach composition of the present invention in an amount of 0.01 to 10% by weight, preferably 0.1 to 10% by weight.
More preferably, 0.1 to 5% by weight can be added.

The liquid bleach composition of the present invention contains a surfactant as an essential component. The surfactant used in the present invention is preferably at least one selected from an anionic surfactant, a cationic surfactant, and a nonionic surfactant.

The anionic surfactant used in the present invention includes alkyl benzene sulfonate, alkyl or alkenyl ether sulfate, alkyl or alkenyl sulfate, α-olefin sulfonate,
Saturated or unsaturated fatty acid salt, N-acyl amino acid type surfactant, alkyl or alkenyl ether carboxylate,
Examples thereof include amino acid type surfactants, alkyl or alkenyl phosphate salts and the like. Of these, alkylbenzene sulfonates having 8 to 22 carbon atoms in the alkyl group are particularly preferred.

As the cationic surfactant used in the present invention, a compound represented by the general formula (4) is preferable.

[0026]

Embedded image

[In the formula, at least one of R ⁶ , R ⁷ , R ⁸ , and R ⁹ represents an alkyl group or an alkenyl group having 6 to 20 carbon atoms, and the rest is an alkyl group having 1 to 3 carbon atoms or Shows a hydroxyalkyl group. Also, B ^- represents an anion of an organic or inorganic. Specific examples of the compound represented by the general formula (4) include the following compounds.

[0028]

Embedded image

(In the above series of formulas, h, g and d are the same or different and represent a number of 6 to 20.) The nonionic surfactant used in the present invention is represented by the general formula (2). Are preferred.

R ⁴ -X- (AO) _m -Z (2) wherein R ⁴ represents a straight-chain or branched-chain alkyl or alkenyl group having 6 to 22 carbon atoms, or a straight-chain or branched X represents an aryl group which may be substituted by an alkyl group having 1 to 18 carbon atoms in the chain, X represents the above-mentioned meaning, A represents a linear or branched alkylene group having 2 to 3 carbon atoms, m A
May be the same or different. Z is H or carbon number 1
3 represents an alkyl group, and m represents a number having an average value of 3 to 19. In the general formula (2), R ⁴ has 8 to 18 carbon atoms.
Is preferred, and X is preferably -O-.
The A group 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.

Specific examples of the nonionic surfactant used in the present invention are shown in Table 1 below.

[0032]

[Table 1]

The surfactant is incorporated in the liquid bleach composition of the present invention in an amount of 0.1 to 50% by weight, preferably 0.5 to 30% by weight, more preferably 1 to 20% by weight. Sufficient cleaning performance can be obtained by adding 0.1% by weight or more of a surfactant, and 50% by weight or less is preferable in order to suppress an increase in viscosity.

The liquid bleaching composition of the present invention may optionally contain a bleaching activator. As the bleach activator used in the present invention, a compound represented by the general formula (3) is preferable.

[0035]

Embedded image

[Wherein, R ⁵ is a straight or branched chain having 5 carbon atoms.
~ 19 represents an alkyl group or an alkenyl group, W is -S
Represents O ₃ M or —COOM, and M represents H or an organic or inorganic cation. Specific examples of the compound represented by the general formula (3) include the following compounds.

[0037]

Embedded image

The content of the bleach activator in the liquid bleach composition of the present invention is preferably 0.1 to 10% by weight.

The liquid bleach composition of the present invention may further contain a sequestering agent. Examples of the sequestering agent include (1) a phosphoric acid compound such as phytic acid or an alkali metal salt or an alkanolamine salt thereof (2) ethane-1,1-diphosphonic acid, ethane-1,1,2-triphosphonic acid , 1-hydroxyethylidene-1,1-diphosphonic acid and its derivatives, ethanehydroxy-1,1,2
-Triphosphonic acid, ethane-1,2-dicarboxy-1,2
-Phosphonic acids such as diphosphonic acid and methanehydroxyphosphonic acid or alkali metal salts or alkanolamine salts thereof (3) 2-phosphonobutane-1,2-dicarboxylic acid, 1-phosphonobutane-2,3,4-tricarboxylic acid, α -Phosphonocarboxylic acids such as methylphosphonosuccinic acid or alkali metal salts or alkanolamine salts thereof (4) amino acids such as aspartic acid, glutamic acid, glycine or alkali metal salts or alkanolamine salts thereof (5) nitrilotriacetic acid , Iminodiacetic acid, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, glycol etherdiaminetetraacetic acid, hydroxyethyliminodiacetic acid,
Aminopolyacetic acids such as triethylenetetramine hexaacetic acid and diencoric acid, or alkali metal salts or alkanolamine salts thereof (6) diglycolic acid, oxydisuccinic acid, carboxymethyloxysuccinic acid, citric acid, lactic acid, tartaric acid, oxalic acid, malic acid Organic acids such as oxydisuccinic acid, gluconic acid, carboxymethylsuccinic acid, carboxymethyltartaric acid or alkali metal salts or alkanolamine salts thereof (7) Alkali metal salts or alkanolamine salts of aluminosilicate represented by zeolite A (8 Examples thereof include aminopoly (methylenephosphonic acid) or an alkali metal salt or alkanolamine salt thereof, and polyethylene polyamine poly (methylenephosphonic acid) or an alkali metal salt or alkanolamine salt thereof. Among them, the above (2), (5), (6) and
At least one member selected from the group consisting of (7) is preferable, and at least one member selected from the group consisting of the above (2) is more preferable. The compounding amount of such a sequestering agent is desirably 0.0005 to 5% by weight, preferably 0.01 to 1% by weight, based on the liquid bleach composition of the present invention.

The liquid bleach composition of the present invention may contain known components which are usually added in addition to the above components. For example, water-soluble inorganic builders such as sulfates, carbonates, bicarbonates, silicates and phosphates can be used as builders. In addition, as a stabilizer for peroxides or hydrogen peroxide adducts, known magnesium sulfate, magnesium silicate, magnesium chloride, magnesium silicofluoride, magnesium oxide, magnesium salts such as magnesium hydroxide, and silicates such as sodium silicate are used. be able to. Further, if necessary, a redeposition inhibitor such as carboxymethylcellulose, polyvinylpyrrolidone, or polyethylene glycol can be added.

The liquid bleach composition of the present invention is basically the above-mentioned essential component and further the above-mentioned optional component dissolved or dispersed in water. A hydrotrope agent may be added for the purpose of improving the properties and preventing liquid separation at high temperatures. As such a hydrotrope, generally, a short-chain alkylbenzene sulfonate represented by toluene sulfonate, xylene sulfonate, etc., ethanol, ethylene glycol, propylene glycol, hexylene glycol, glycerin, etc. Representative examples include alcohols and polyhydric alcohols. The hydrotrope can be added in an amount of about 0 to 30% by weight in the liquid bleach composition of the present invention.

Further, the liquid bleaching composition of the present invention can further contain various compounds. For example,
Phosphoric acid, barbituric acid, uric acid, acetanilide, aminopolycarboxylic acids represented by oxyquinoline, phenacetin and the like, and DL-α-tocopherol, gallic acid derivatives, butyl known as hydrogen peroxide stabilizers Hydroxyanisole (BHA), 2,6-
Di-tert-butyl-4-methylphenol (BHT) and the like can be added. The amount of these stabilizers depends on the concentration of hydrogen peroxide, but it is usually about 0 to 5% by weight, preferably 0.01 to 3% by weight, in the composition of the present invention.

Further, the liquid bleach composition of the present invention may contain a substance known as an anti-fading agent. Such substances include phenylalanine, histidine,
Lysine, tyrosine, amino acids such as methionine and amino acid salts, and amino or imide compounds such as hydroxyiminodiacetic acid, and acrylonitrile and one or two or more monomers copolymerizable with acrylonitrile having a quaternary ammonium group And copolymers. Although amino acids have optical isomers, optical isomers do not participate in the effects of the present invention. Therefore, it is also possible to use chemically synthesized amino acids. In addition, the liquid bleach composition of the present invention contains Tinopearl (T) as a fluorescent whitening agent to increase the bleaching effect on white fiber.
inopal) CBS (manufactured by Ciba-Geigy),
A fluorescent whitening agent such as Tinopearl SWN (manufactured by Ciba Geigy) or a color index fluorescent whitening agent 28, 40, 61, 71 may be added in an amount of 0 to 5% by weight.

The liquid bleach composition of the present invention may further contain a coloring agent such as a dye or a pigment, a bactericide, an ultraviolet absorber, an inorganic electrolyte (eg, NaCl, Na ₂ SO ₄ , CaCl ₂ ), and the like. Various trace additives can be added in appropriate amounts (each about 0 to about 2% by weight). As the dye, an acid dye having hydrogen peroxide resistance in an acidic solution is particularly preferable. Also,
In the composition of the present invention, conventionally known enzymes (cellulase, amylase, protease, lipase, etc.) can be blended as needed to improve the bleaching performance.

The pH of the liquid bleaching composition of the present invention is desirably 6 or less, preferably 3.5 or less, from the viewpoint of storage stability of hydrogen peroxide. To adjust the pH, use an inorganic acid such as sulfuric acid or phosphoric acid, or an organic acid such as toluenesulfonic acid or benzenesulfonic acid, or use the above-described sequestering agent or anionic surfactant It is advisable to add it in the form or to adjust it with a caustic such as sodium hydroxide or potassium hydroxide as needed.

The liquid bleach composition of the present invention is applied directly to clothing and left for 10 to 30 minutes, and then washed or washed with an aqueous solution in which the liquid bleach composition of the present invention is previously dissolved in tap water. Can be immersed and bleached. Further, the liquid bleach composition of the present invention can be used by mixing with a conventionally known clothing detergent.

[0047]

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 12 and Comparative Examples 1 to 9 Hydrogen peroxide, the following (b-1) to (b-6) as thickeners of the present invention:
The following (b'-1) to (b'-5) as comparative thickeners, the following (c-1) to (c-4) as surfactants, and the following as bleach activators
Using (d-1) to (d-2) and the following (e-1) as a sequestering agent, liquid bleach compositions having the compositions shown in Tables 2 to 5 were prepared.

-Thickener Emanone 3170 (manufactured by Kao Corporation) (b-1) (polyoxyethylene monostearate, molecular weight 3300, E = 13) Emanone 3199 (manufactured by Kao Corporation) (b-2) (Polyoxyethylene monostearate, molecular weight 7000, E = 27) Emanone 1112 (manufactured by Kao Corporation) (b-3) (Polyoxyethylene monolaurate, molecular weight 640, E = 3.5) Emulgen 2200 (Kao Corporation (B-4) (polyoxyethylene cetyl ether, molecular weight 7000, E = 31) bissurf S (manufactured by Kao Corporation) (b-5) (addition reaction product of Emulgen 3200 with vinylcyclohexene diepoxide, Bissurf CT (manufactured by Kao Corporation) (b-6) (addition reaction product of Emulgen 2200 and vinylcyclohexene diepoxide, molecular weight 20,000-30,000, E> 30) -Bopol ETD2691 (manufactured by BFGoodrich) (b'-1) (polyacrylic acid-based polymer) Xanthan gum (b'-2) EO 10 mol adduct of stearyl alcohol (b'-3) (molecular weight 710, E = 1.8) Ethyl alcohol EO11 molar adduct of (b'-4) (molecular weight 530, E = 17.3) Polyethylene glycol (molecular weight 8,000) (b'-5) ・ Surfactant Alkyl (C12 of alkyl group) Benzenesulfonic acid (c- 1) N-tetradecyl-N, N-dimethyl-N-ethylammonium sulfate (c-2) C ₁₂ H ₂₅ O (C ₂ H ₄ O) ₄ -H (c-3) C ₁₂ H ₂₅ O (C ₂ H ₄ O) ₈ -H (c-4) ・ Bleaching activator

[0050]

Embedded image

-Sequestering agent 1-hydroxyethylidene-1,1-diphosphonic acid (e-1) (manufactured by Monsanto Japan Co., Ltd., trade name: Diquest 2010) Hydrogen oxide stability, viscosity and rate of change of viscosity were measured. The results are shown in Tables 2 to 5.

<Measurement Method of Stability of Hydrogen Peroxide> The liquid bleaching composition before storage and the liquid bleaching composition after storage under the conditions shown in Tables 2 to 5 were used as 1/10 N permanganate standard solutions. The available oxygen was determined and the stability of hydrogen peroxide was measured by the following equation.

[0053]

(Equation 3)

<Measurement Method of Viscosity> The viscosities at 10 ° C., 20 ° C. and 30 ° C. were measured using a B-type viscometer (model BM) manufactured by Tokyo Keiki Co., Ltd.

<Measurement method of change rate of viscosity>
The rate of change of the viscosity when the temperature was changed from 30 ° C to 30 ° C was calculated.

[0056]

(Equation 4)

[0057]

[Table 2]

[0058]

[Table 3]

[0059]

[Table 4]

[0060]

[Table 5]

Note) *: pH was adjusted with 1/10 N sulfuric acid.

As is clear from the results in Tables 2 to 5, the liquid bleach composition of the present invention has a small change in viscosity with respect to a change in temperature, whereas the comparative liquid bleach composition has a thickened composition. It can be seen that the viscosity does not change or the viscosity changes significantly with a change in temperature. Further, it can be seen that the liquid bleach composition of the present invention has good stability of hydrogen peroxide, whereas the thickener used in the comparative example decomposes hydrogen peroxide.

Claims (12)

[Claims] 1. A thickened liquid bleaching composition comprising hydrogen peroxide, a thickener and a surfactant and having a viscosity at 30 ° C. of 10 to 1,000 mPa · s, wherein the thickener is A compound having a molecular weight of 600 or more having a polyoxyalkylene chain and an alkyl group or an alkenyl group in the molecule, and the weight ratio of the polyoxyalkylene chain and the alkyl group or the alkenyl group in the molecule is polyoxyalkylene chain / alkyl group or A thickened liquid bleach composition, wherein alkenyl groups> 2. 2. The thickened liquid bleach composition according to claim 1, which has a viscosity at 30 ° C. of 10 to 500 mPa · s. 3. The molecular weight of the thickener having a polyoxyalkylene chain and an alkyl or alkenyl group in the molecule.
3. The thickened compound according to claim 1, wherein the weight ratio of the polyoxyalkylene chain to the alkyl group or the alkenyl group in the molecule is 1,000 to 30,000 and the ratio is polyoxyalkylene chain / alkyl group or alkenyl group> 5. Liquid bleach composition. 4. The thickened liquid bleach composition according to claim 1, wherein the thickener is a polyoxyethylene compound represented by the general formula (1). R ¹ -X- (C ₂ H ₄ O) _n- (CO) _p -R ² (1) wherein R ¹ represents a linear or branched alkyl or alkenyl group having 10 to 20 carbon atoms , R ² represents H or a linear or branched alkyl group or alkenyl group having 10 to 20 carbon atoms, and X represents -O-, -COO-, -NR ³ -or -CONR ^3-
Is shown. Here, R ³ is H or an alkyl group having 1 to 3 carbon atoms,
It represents a hydroxyalkyl group or a polyoxyalkylene group. p is 0 or 1, and p is 0 when R ² is H ² . N is a number having an average value of 20 to 500.
R ¹ , R ² and n are selected such that the molecular weight and the weight ratio of the polyoxyalkylene chain to the alkyl group or alkenyl group in the molecule fall within the above ranges. ] 5. The thickened liquid bleaching composition according to claim 1, wherein the thickener is a polyoxyethylene compound represented by the general formula (1 ′). R ¹ -X- (C ₂ H ₄ O) _a -Y-[(C ₂ H ₄ O) _b -XR ¹ ] _q (1 ′) wherein R ¹ and X have the same meanings as above, And b are the same or different and have an average value of 20 to 500, and q is 0 to 3
And Y represents a group derived by ring opening of the diepoxide. ] 6. The thickener according to claim 1, wherein the surfactant is at least one selected from the group consisting of an anionic surfactant, a cationic surfactant and a nonionic surfactant. Liquid bleach composition. 7. The thickened liquid bleach composition according to claim 1, wherein the surfactant is a nonionic surfactant represented by the general formula (2). R ⁴ -X- (AO) _m -Z (2) [wherein, R ⁴ represents a linear or branched alkyl group or alkenyl group having 6 to 22 carbon atoms, or a linear or branched carbon group. X represents an aryl group which may be substituted by an alkyl group having 1 to 18; X represents the above-mentioned meaning; A represents a linear or branched alkylene group having 2 to 3 carbon atoms;
May be the same or different. Z is H or carbon number 1
3 represents an alkyl group, and m represents a number having an average value of 3 to 19. ] 8. The method according to claim 1, further comprising a bleach activator.
A thickened liquid bleach composition according to any one of the preceding claims. 9. The thickened liquid bleach composition according to claim 8, wherein the bleach activator is a compound represented by the general formula (3). Embedded image (In the formula, R ⁵ represents a linear or branched alkyl group or alkenyl group having 5 to 19 carbon atoms, and W is -SO ₃ M or -C
OOM is shown, and M is H or an organic or inorganic cation. ] 10. The thickened liquid bleach composition according to claim 1, further comprising a sequestering agent. 11. The composition according to claim 1, wherein the content of the thickener is 0.01 to 10
The thickened liquid bleach composition according to any one of claims 1 to 10, wherein the content of the surfactant is 0.1 to 50% by weight. 12. The method according to claim 1, wherein when the temperature is changed from 20 ° C. to 30 ° C., the rate of change in viscosity calculated by the following equation is 0.60 or less. Liquid bleach composition. (Equation 1)