JP2003020499A - Two-pack type bleach - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-pack type bleach capable of assuring stable bleaching effect even if the temperature is varied. SOLUTION: This two-pack type bleach is obtained by filling an A agent and a B agent in a container separately keeping the A agent from the B agent, wherein the A agent comprises 0.05-10 mass% hydrogen peroxide and water, the B agent comprises a composition containing an alkaline chemical and water and a specified nonionic surfactant having 27-90 deg.C clouding point is added to at least one of the A agent or the B agent.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a two-component liquid bleaching agent.

[0002]

2. Description of the Related Art Liquid bleaching agents containing hydrogen peroxide as a main base can be used for color / patterned products.
It is used because it can be applied directly to dirt. The liquid oxygen bleach currently available on the market is generally used by applying a predetermined amount of the bleach to a garment and applying the bleach to a clothes or a washing machine. However, the bleaching effect is not sufficient.

Further, studies have been conducted on a two-pack type liquid bleaching agent for the purpose of improving the bleaching effect and obtaining sufficient storage stability. JP-A-3-140400, JP-A-6-166892, JP-A-9-157693 and JP-A-9-48997 contain an A agent containing hydrogen peroxide hydrogen and a bleach activator. A bleaching composition comprising agent B has been disclosed. These techniques are superior in bleaching effect to the case where a liquid oxygen bleaching agent containing hydrogen peroxide as a main base is used alone, but it is not yet at a satisfactory level. In particular, the conventional two-pack type bleaching agent has not been sufficiently studied for suppressing the fluctuation of the viscosity of the composition due to temperature change, and the viscosity of the bleaching agent changes when the temperature of the bleaching agent changes depending on the season and time of use. In some cases, it was difficult to maintain the desired cleaning bleaching power because the mixing in the designed ratio was not achieved.

Therefore, an object of the present invention is to provide a two-component bleaching agent which can always obtain a stable bleaching effect even if the temperature of the bleaching agent changes.

[0005]

The present invention provides an agent A comprising a composition containing 0.05 to 10% by mass of hydrogen peroxide and water and having a pH at 20 ° C. of 7.0 or less. ℃
B comprising an aqueous composition having a pH of 8.0 or higher
A two-component bleaching agent in which the agent and the agent A and B are separated and held, and at least one of the agent A and the agent B is represented by the following formula (I) and is cloudy. It relates to a two-part bleaching agent containing a nonionic surfactant having a point of 27 to 90 ° C. ^{R 1 -O- (R 2 -O)} m - (R 3 -O) n H (I) wherein, R ¹ is straight or branched chain alkyl group having 8 to 20 carbon atoms, R ² is ethylene Group, R ³ represents a propylene group,
m and n each represent an integer of 0 to 20, m and n are not 0 at the same time, and-(R ² -O)-group and-(R
^{The 3-} O)-groups may be bonded randomly. ].

The bleaching agent as used in the present invention includes not only bleaching agents as auxiliary agents for detergents but also use as independent cleaning agents.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION <A agent> Since the A agent used in the present invention can obtain a good bleaching effect, hydrogen peroxide is preferably contained in an amount of 0.05% to 10% by mass, more preferably 0. 1 to 8% by mass, particularly preferably 0.5 to 6% by mass. The hydrogen peroxide concentration is measured by a titration method using potassium permanganate.

Further, the agent A may contain a bleaching activator. For example, a bleach activator having an ester group, an imide group, or a nitrile group can be mentioned. Preferable activators having an ester group include alkanoyloxybenzene sulfonic acid salts, alkanoyloxybenzene carboxylic acids or salts thereof, and those having an imide group include tetraacetylethylenediamine.
Examples of the activator having a nitrile group include compounds described in JP-A-1-068347. Among them, as the most preferable activator, an alkanoyloxybenzenesulfonic acid type bleaching activator or an alkanoyloxybenzenecarboxylic acid type bleaching activator is preferable, and particularly a carbon number of 6 to 14, preferably 7 to
Alkanoyloxybenzenesulfonic acid having 13 alkanoyl groups or 6 to 14 carbon atoms, preferably 7
Alkanoyloxybenzenecarboxylic acids having alkanoyl groups of -13 or salts thereof are preferred. Specific preferred examples include octanoyloxy-p-benzenesulfonic acid, nonanoyloxy-p-benzenesulfonic acid, 3,5,5-trimethylhexanoyloxy-p-
Benzenesulfonic acid, decanoyloxy-p-benzenesulfonic acid, dodecanoyloxy-p-benzenesulfonic acid, octanoyloxy-o- or -p-benzenecarboxylic acid, nonanoyloxy-o- or -p-benzenecarboxylic acid, 3,5,5-trimethylhexanoyloxy-o- or -p-benzenecarboxylic acid, decanoyloxy-o- or -p-benzenecarboxylic acid, dodecanoyloxy-o- or -p-benzenecarboxylic acid, and Those salts are mentioned. As the salt, sodium salt, potassium salt and magnesium salt are preferable, and sodium salt is particularly preferable from the viewpoint of solubility.

Among these, especially nonanoyloxy-p
-Benzenesulfonic acid, decanoyloxy-p-benzenecarboxylic acid, nonanoyloxy-p-benzenecarboxylic acid, 3,5,5-trimethylhexanoyloxy-p
-Benzenecarboxylic acid, dodecanoyloxy-p-benzenesulfonic acid and salts thereof are preferable from the viewpoint of lipophilic stain bleaching effect. The agent A is a bleach activator of 0.05 to 1
It is preferably contained in an amount of 0% by mass, further 0.1 to 7% by mass, and particularly 0.1 to 5% by mass.

The pH of agent A at 20 ° C. is 7.0.
Or less, preferably 1.0 to 7.0, more preferably 1.
It is 5 to 6.5, more preferably 2.0 to 6.0, and particularly preferably 2.0 to 5.0. It is preferable to use an acid agent in order to adjust to such a pH. Sulfuric acid, phosphoric acid, boric acid, phosphonic acid, phosphonocarboxylic acid, carboxylic acid, polycarboxylic acid and aminocarboxylic acid are preferable as the acid agent for adjusting the pH. Except for sulfuric acid, it has a chelating ability to trap heavy metals that cause the decomposition of hydrogen peroxide, and also has a buffering ability.
Even if mixed in the agent, the decomposition of hydrogen peroxide can be suppressed. The use of hydrochloric acid as an acid agent is not preferable because chlorine ions reduce the stability of hydrogen peroxide. It is preferable that the content of chlorine ions is suppressed and 0.2 mass% or less, further 0.02 mass% or less, and particularly substantially not contained in the agent A. Acid agent is 0.001-10 in agent A
It is preferable that the compounding amount is in the range of 0.1% by mass, more preferably 0.1 to 5% by mass, especially 0.1 to 3% by mass.

The agent A of the present invention may be blended with an alkaline agent as long as the above pH condition is satisfied. In agent A,
The alkali agent is preferably used for the purpose of adjusting pH, and alkali metal hydroxide is preferable.

<Agent B> Agent B is a composition containing water and has a pH at 20 ° C. of 8.0 or higher, preferably 8.
It is 0 to 13.0, more preferably 9.0 to 12.0, and particularly preferably 9.5 to 11.0. In order to adjust the pH of the agent B of the present invention to such a pH, it is preferable to add an alkaline agent.

As the alkali agent, one or more selected from alkali metal hydroxides, alkaline earth metal hydroxides, carbonates, silicates and alkanolamines are preferable, and specifically, sodium hydroxide and hydroxide are used. Potassium, sodium silicate, potassium silicate, sodium carbonate, potassium carbonate, sodium silicate, potassium silicate, monoethanolamine, diethanolamine, triethanolamine, preferably sodium hydroxide, potassium hydroxide,
It is one or more selected from sodium carbonate, potassium carbonate and monoethanolamine.

The alkali agent is preferably blended in the agent B in the range of 0.1 to 20% by mass, more preferably 1 to 15% by mass, and particularly 4 to 15% by mass.

In the agent B of the present invention, in addition to the alkaline agent, p
An acid agent may be added as long as the H condition is satisfied. The acid agent is preferably sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid, boric acid, phosphonic acid, phosphonocarboxylic acid, carboxylic acid and aminopolycarboxylic acid.

The agent B is an alkali metal salt of a homopolymer of acrylic acid, methacrylic acid or maleic acid, an alkali metal salt of a copolymer thereof, or an alkali metal salt of a copolymer of an unsaturated compound copolymerizable therewith. It is preferable to contain. Specifically, the weight average molecular weight using polyethylene glycol as a standard substance in gel permeation chromatography was 3,000 to 3
50,000 poly (sodium acrylate) (or potassium) or poly (sodium methacrylate) (or potassium) having a weight average molecular weight of 20,000 to 100,
000, preferably 50,000 to 80,000 sodium (or potassium) salts of acrylic acid-maleic acid copolymers are good. In the case of acrylic acid-maleic acid copolymer, acrylic acid / maleic acid is preferably 5/5 to 9/1 in mass ratio, and more preferably 6/4 to 8/2 in terms of cleaning effect. From the standpoint of the bleaching effect, it is preferable that the agent B contains 0.1 to 20% by mass, and further 0.5 to 10% by mass of such a polymer alkali metal salt.

<Nonionic Surfactant> In addition, 2 of the present invention
The agent type bleaching agent is a nonionic interface in which at least one of the agent A and the agent B, preferably both are represented by the following formula (I) and have a cloud point of 27 to 90 ° C. for the purpose of enhancing the bleaching cleaning effect. It contains an activator [hereinafter referred to as component (C)]. ^{R 1 -O- (R 2 -O)} m - (R 3 -O) n H (I) wherein, R ¹ is straight or branched chain alkyl group having 8 to 20 carbon atoms, R ² is ethylene Group, R ³ represents a propylene group,
m and n each represent an integer of 0 to 20, m and n are not 0 at the same time, and-(R ² -O)-group and-(R
^{The 3-} O)-groups may be bonded randomly. ].

Among the nonionic surfactants having the structure of the above general formula, those having a cloud point of less than 27 ° C. are
If the ratio of the agent and the agent B is always measured correctly as designed,
Although a relatively high washing and bleaching power can be obtained, this nonionic surfactant has a drastic change in viscosity with temperature, and due to changes in temperature depending on the season and date, agents A and B are not mixed in a certain ratio, A certain high bleaching cleaning effect cannot be obtained.
However, in the present invention, since the component (C) having a cloud point of 27 to 90 ° C. is used, the agent A and the agent B are always mixed in a constant ratio even if the temperature changes, so that the target high bleaching cleaning is performed. The effect is obtained.

In the present invention, the agent A and / or the agent B is
The total amount of the component (C) is 0.1 to 30% by mass, and further 0.5 to
It is preferable to contain 20% by mass, particularly 1.0 to 15% by mass.

<Other Components> The agent A and / or agent B of the present invention may contain a surfactant other than the component (C), but it is preferable that the viscosity change with temperature is small. As the surfactant, one or more selected from nonionic surfactants other than the component (C), cationic surfactants, anionic surfactants and amphoteric surfactants are preferable.

As the nonionic surfactant other than the component (C), a compound of the general formula (1) having a cloud point of less than 27 ° C. can be used within a range that does not impair the effects of the present invention. . R < ¹¹ > -T-[(R < ¹² > O) _a- H] _b (1) [In formula, R < ¹¹ > has a carbon number of 6-18, Preferably it is 10-1.
6 is an alkyl group or an alkenyl group, R ¹² is an alkylene group having 2 or 3 carbon atoms, and is preferably an ethylene group. a represents a number of 2 to 200, preferably 4 to 50, particularly preferably 5 to 20. T is -O-, -CON-
Or -N-, and when T is -O-, b is 1.
B is 2 when T is -CON- or -N-. ].

The following compounds can be mentioned as specific examples of the compound of the general formula (1). ^{_{R 11 -O- (C 2 H 4}} O) r -H (1-a) wherein, R ¹¹ have the same meanings as defined above. r is a number of 2 to 200, preferably 3 to 100, more preferably 4 to 20. ] ^{_{R 11 -O- (C 2 H 4}} O) s - (C 3 H 6 O) t -H (1-b) wherein, R ¹¹ have the same meanings as defined above. s and t are each independently a number of 2 to 15, preferably 2 to 10, and ethylene oxide and propylene oxide may be random or block adducts. ]

[0023]

[Chemical 1]

In the present invention, among these, especially (1-a)
Alternatively, a nonionic surfactant selected from (1-b) is preferable. When a nonionic surfactant selected from (1-a) and (1-b) is used in combination with the component (C), it is adjusted so that the cloud point of the mixture of them is 27 ° C. or higher. It is necessary to. When these are used in combination, the mass ratio of [(1-a) + (1-b)] / (C) component is preferably 1 or less, more preferably 0.5 or less,
It is more preferably 0.2 or less, and particularly preferably 0.1 or less.

The cationic surfactant is preferably a mono-long chain alkyl (or alkenyl) tri-short chain alkyl type cationic surfactant represented by the following general formula (2).

[0026]

[Chemical 2]

[Wherein R ²¹ is an alkyl group or an alkenyl group having 8 to 18 carbon atoms, preferably 10 to 18 carbon atoms, particularly preferably 10 to 16 carbon atoms, and R ²² , R ²³ and R ²⁴ are the same or different. It may be an alkyl group having 1 to 3 carbon atoms. X ⁻ is an anion, preferably a halogen ion, an alkyl sulfate ester ion having 1 to 3 carbon atoms, and 1 to 1 carbon atoms
It is a fatty acid ion of 2 and an aryl sulfonate ion which may have 1 to 3 substituents having 1 to 3 carbon atoms. ].

As the anionic surfactant, an alkyl group or an alkenyl group having 10 to 18 carbon atoms, preferably 10 to 16 carbon atoms, particularly preferably 10 to 15 carbon atoms in the molecule, and --SO.
Anionic surfactants having ₃ M groups and / or -OSO ₃ M groups [M: counterion] are preferred. Specifically, alkylbenzene sulfonic acid having the above carbon number, alkyl (or alkenyl) sulfuric acid ester, polyoxyalkylene alkyl (or alkenyl) ether sulfuric acid ester, olefin sulfonic acid, alkane sulfonic acid, α-sulfo fatty acid, α-sulfo fatty acid Esters and their salts are preferred. Among these, alkyl (or alkenyl) sulfuric acid esters having an alkyl group or alkenyl group having 10 to 16 carbon atoms, an alkyl group or alkenyl group having 10 to 16 carbon atoms, and ethylene oxide (hereinafter referred to as EO) average The number of added moles is 1 to 6, preferably 1 to
4, particularly preferably 1 to 3, polyoxyethylene alkyl (or alkenyl) ether sulfate, or alkylbenzene sulfonic acid having 10 to 15 carbon atoms,
And it is preferable to blend one or more selected from these salts. As the salt, sodium salt, potassium salt,
Ammonium salt and alkanolamine salt are preferable from the viewpoint of storage stability.

As the amphoteric surfactant, the following general formula (3) is used.
Or a compound selected from the compounds of formula (4) is preferred.

[0030]

[Chemical 3]

[Wherein R ³¹ is a straight-chain 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 ³² and R ³³ are each 1 carbon atoms. ~ 3 alkyl groups or hydroxyalkyl groups. R ³⁴ is an alkylene group having 1 to 5 carbon atoms, preferably 2 or 3. A is -COO-, -CONH-, -O
A group selected from CO-, -NHCO-, and -O-,
c is a number of 0 or 1, preferably 1. ]

[0032]

[Chemical 4]

[In the formula, R ⁴¹ is an alkyl group or alkenyl group having 9 to 23 carbon atoms, preferably 9 to 17 carbon atoms, particularly preferably 10 to 16 carbon atoms, and R ⁴² is 1 to 6 carbon atoms, preferably 1 to 6 carbon atoms. 4, particularly preferably 2 or 3 alkylene groups. B is -COO-, -CONH-, -OCO-, -N
HCO-, a group selected from -O-, and d is 0 or 1.
, Preferably 0. R ⁴³ and R ⁴⁴ are each an alkyl group or a hydroxyalkyl group having 1 to 3 carbon atoms, preferably a methyl group, an ethyl group or a hydroxyethyl group, and R ⁴⁵ is a carbon group which may be substituted with a hydroxy group. To 5, preferably 1 to 3 alkylene groups. D
Is a group selected from —SO ₃ ⁻ and —OSO ₃ ⁻ , and —SO ₃ ⁻ is particularly preferable from the viewpoint of bleaching cleaning effect. ].

The agent A of the present invention has a bleaching and washing effect.
Other nonionic surfactants are 0.5 to 20% by mass, further 1 to 15% by mass, and cationic surfactants are 0.05 to 5% by mass.
The content is preferably 0.1% by mass, more preferably 0.1 to 3% by mass. Further, the agent A can contain 0 to 10% by mass of an amphoteric surfactant.

From the viewpoint of cleaning effect, the agent B of the present invention contains 0.5 to 50% by mass, further 1 to 40% by mass of other nonionic surfactant, and 0.5% of anionic surfactant.
˜50% by mass, more preferably 1 to 40% by mass. Further, the agent B is an amphoteric surfactant 0 to 20% by mass,
Preferably, it can contain 0.5 to 10 mass%.

A solvent is preferably added to the agent A and / or agent B of the present invention for the purpose of enhancing the cleaning effect. As the solvent, (i) a monohydric alcohol having 1 to 5 carbon atoms, (ii)
A polyhydric alcohol having 2 to 12 carbon atoms, (iii) a compound represented by the following general formula (5), (iv) the following general formula (6)
And a compound represented by the following general formula (7).

[0037]

[Chemical 5]

[Wherein R⁵¹And R⁵²Is the hydrogen source
Child, an alkyl group having 1 to 6 carbon atoms, a phenyl group, or benzyl
R group, but R⁵¹And R⁵²When both become hydrogen atoms
Excluding cases. g is a number from 0 to 10 and h is a number from 0 to 10.
Except that both g and h are 0. R⁶¹as well as
R⁶²Are each an alkyl group having 1 to 3 carbon atoms. R
⁷¹Represents an alkyl group having 1 to 8 carbon atoms. ].

Examples of the monohydric alcohol having 1 to 5 carbon atoms (i) include ethanol, propyl alcohol and isopropyl alcohol. These low grade (C1-C1
5) Stability of the system at low temperatures can be further improved by blending alcohol.

Examples of the (2) polyhydric alcohol having 2 to 12 carbon atoms include isoprene glycol, 2,2,4-trimethyl-1,3-pentanediol, 1,8-octanediol and 1,9-nonanediol. , Ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, glycerin and the like.

The compound (iii) has a carbon number of 1 to 1 when R ⁵¹ and R ⁵² are an alkyl group in the general formula (5).
4 is particularly preferred. Further, in the general formula (5), g and h of the average addition mole number of EO and propylene oxide are numbers of 0 to 10 (excluding the case where both s and t are 0). The order of addition is not particularly limited, and may be random addition. Specific examples of the compound (iii) include ethylene glycol monobutyl ether, dipropylene glycol dimethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monobutyl ether, propylene glycol monoethyl ether, propylene glycol dimethyl ether, Polyoxyethylene (p = 2-3) Polyoxypropylene (p = 2-3)
Examples thereof include glycol dimethyl ether (p represents the average number of moles added), polyoxyethylene (p = 3) glycol phenyl ether, phenyl carbitol, phenyl cellosolve, and benzyl carbitol. this house,
Propylene glycol monomethyl ether, diethylene glycol monobutyl ether, and polyoxyethylene (p = 1 to 4) glycol monophenyl ether are preferable from the viewpoints of detergency and feeling of use.

Further, as the compound (iv), 1,3-
Dimethyl-2-imidazolidinone, 1,3-diethyl-
2-Imidazolidinone is exemplified as a suitable one,
Alkyl glyceryl etherification as the compound of (v)
Compound, preferably R ⁷¹Is an al having 3 to 8 carbon atoms
It is a compound of the kill group.

Of these, water-soluble solvents (i), (ii), (iii) and (v) are preferable in order to satisfy the properties of the present invention, and particularly ethanol, isopropyl alcohol,
Ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, glycerin,
A solvent selected from isoprene glycol, propylene glycol monomethyl ether, propylene glycol monoethyl ether, pentyl glyceryl ether, octyl glyceryl ether, and polyoxyethylene (p = 1 to 4) glycol monophenyl ether is preferable.

The agent A and / or agent B of the present invention contains such a solvent in an amount of 0.1 to 10% by mass, further 0.3 to 7% by mass,
In particular, it is preferable to contain 0.5 to 5% by mass.

The two-pack bleaching agent of the present invention comprises the above-mentioned agents A and B.
The agent is mixed for bleaching and washing, and the mixing ratio of agent A and agent B is A agent / B agent = 1/10 to 10/1 by mass ratio.
Further, 1/5 to 5/1 is preferable from the viewpoint of the bleaching cleaning effect.

The composition of agents A and B is such that the mixture of equal amounts of both has a pH at 20 ° C. of 9.5 to 11.
It is preferably 0, more preferably 9.8 to 10.9.

The viscosities of agents A and B at 20 ° C. are both 3 to 300 mPa · s, and further 4 to 200 m.
Pa · s is preferable in terms of usability.
In order to adjust to such a viscosity, a viscosity modifier can be added to the agent A and / or the agent B. As the viscosity modifier, benzenesulfonic acid which may be substituted with 1 to 3 alkyl groups having 1 to 3 carbon atoms or hydroxy groups, polyethylene glycol or polypropylene glycol having a molecular weight of 3000 to 100000 can be used.
Such a viscosity adjusting agent is added to the agent A and / or the agent B in an amount of 0 to 10
It is preferable that the content is 0.01% by mass, more preferably 0.01 to 5% by mass.

For the two-pack type bleaching agent of the present invention, it is preferable to use a container equipped with a discharging section capable of simultaneously discharging the agents A and B for the purpose of easily achieving the above-mentioned mixing ratio. Further, the container is capable of separately holding the agent A and the agent B. For example, an integrated container capable of storing the agent A and the agent B in different storage parts, a container capable of storing the agent A and the container B.
Examples thereof include a connection type container in which a container capable of containing the agent is joined with an appropriate member. Further, the container used in the present invention,
The ratio of the discharge amounts of agent A and agent B is a mass ratio of agent A / agent B = 1/1.
It is preferable to adjust the shape of each discharge part so that it becomes 0 to 10/1, preferably 1/5 to 5/1. The discharge amount can be adjusted by a known method by adjusting the viscosities of the agents A and B and the opening area and shape of the discharge portion. The opening area of the ejection portion is 1/10 to 10/1, preferably 1/5 to 5/1 in terms of area ratio between the A agent ejection portion and the B agent ejection portion.
Is preferable for adjusting the discharge amount. It may be measured twice or more times, but from the viewpoint of ease of use, it is preferable that two agents are mixed at a designed specific ratio in one measurement operation. As shown in a schematic diagram, the one shown in FIG. In FIG. 1, (1) is a partition that divides the storage part for storing the A agent and the B agent.
The discharge part (2) is a circular opening having a diameter of 5 mm. Agent A,
The measuring container for the agent B is not specified, but in consideration of usability, for example, a cap (1-1) having a measuring function shown in FIG. 1 is preferable.

[0049]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, in the two-pack type bleaching agent using the agent A and the agent B, by using a specific nonionic surfactant in combination, an excellent bleaching effect which has never been obtained is obtained. Is obtained. Moreover, a stable bleaching effect can always be obtained even when the temperature of the bleaching agent changes depending on the season and time of use.

[0050]

EXAMPLES The agent A shown in Table 1 and the agent B shown in Table 2 were used in Table 3
The two-part liquid bleaching agent was prepared by filling the container shown in FIG. The cloud point of the nonionic surfactant used and the viscosities of agents A and B were measured by the following methods. The bleaching effect was evaluated by the following method. The results are shown in Table 3.

<Cloud Point> An aqueous solution prepared by dissolving 2% by mass of a nonionic surfactant [nonion (1) to (3) in Table 1] in ion-exchanged water was used as a screw tube (Maruemu; No. 5).
Then, while stirring with a magnetic stirrer, the temperature is raised in a water bath, and when it becomes cloudy, the heating is stopped and the mixture is cooled. The cloud point is the temperature at which the aqueous solution becomes transparent.

<Viscosity> 100 mL of the agent A or B is placed in a viscosity beaker and heated or cooled in a water bath to adjust to 10 ° C, 20 ° C, 30 ° C, and the viscosity at each temperature is determined to be B type. With a viscometer [made by Tokyo Keiki Co., Ltd.],
o. It was measured at 1 rotor / 60 rpm.

<Bleaching effect> Using the two-pack type bleaching agent shown in Table 3, each of the agents A and B was weighed out to a total of 20 mL, dissolved in 2000 ml of tap water at 40 ° C., and prepared as follows. Five pieces of black tea-contaminated cloth were immersed for 30 minutes. Then, it was rinsed with tap water and dried, and the bleaching rate was calculated by the following formula. In both cases, the liquid temperature of agents A and B is 10 ° C,
Those at 20 ° C. and 30 ° C. were weighed at a mass ratio of 1/1 respectively so that the total amount was 20 mL, and both were mixed and then dissolved in tap water.

[0054]

[Equation 1]

The reflectance is ND-30 manufactured by Nippon Denshoku Industries Co., Ltd.
Measured using a 460 nm filter at 0A.

<Preparation of black tea-contaminated cloth> After boiling 80 g of Nitto black tea (yellow package) in 3 L of ion-exchanged water for about 15 minutes, rub it with de-squeezed bleached cotton, and rub this solution with cotton cloth # 2003. Soak and boil for about 15 minutes. The material was removed from the heat as it was, and allowed to stand for about 2 hours. Then, the cloth was taken out, naturally dried, washed with water until the washing liquid was not colored, dehydrated, pressed, and then subjected to an experiment as a 10 cm × 10 cm test piece. The reflectance was measured at 460 nm, and cleaning was performed by the cleaning method described above. After washing, the reflectance was measured to obtain the washing rate.

[0057]

[Table 1]

1) 1-Hydroxyethylidene-1,1-
Diphosphonic acid 2) Polyoxyethylene lauryl ether (EO average addition mole number 8; cloud point 79 ° C) 3) Polyoxyethylene lauryl ether (EO average addition mole number 6; cloud point 47 ° C) 4) Polyoxyethylene decyl ether ( EO average addition mole number 3; cloud point 25 ° C.) 5) N-tetradecyl-N, N, N-trimethylammonium chloride 6) Sodium lauroyloxybenzenesulfonate 7) Decanoyloxybenzenecarboxylic acid

[0059]

[Table 2]

8) Alkyl (C12-15) sodium benzene sulfonate

[0061]

[Table 3]

*: The discharge amounts of the agent A and the agent B are the same as those of the discharge portion (2).
Adjusted by changing the size of the opening.

[Brief description of drawings]

FIG. 1 is a schematic view showing an example of a two-component type container containing an agent A and an agent B.

[Explanation of symbols]

(1): Partition wall (2): Discharge part (1-1): Cap

Continued front page    (72) Inventor Kazuyoshi Ozaki             Kao Co., Ltd. 1334 Minato, Wakayama City, Wakayama Prefecture             Inside the laboratory (72) Inventor Nobuyuki Ogura             Kao Co., Ltd. 1334 Minato, Wakayama City, Wakayama Prefecture             Inside the laboratory F-term (reference) 4H003 AA03 AB19 AC08 AC23 AE05                       BA12 BA14 DA01 EA08 EA16                       EB14 EB22 EB24 ED02 EE04                       FA16 FA28 FA30 FA42 FA43

Claims (2)

[Claims] 1. An agent A comprising a composition containing 0.05 to 10% by mass of hydrogen peroxide and water and having a pH at 20 ° C. of 7.0 or less, and a pH at 20 ° C. of 8.0 or more. Which is a two-component bleaching agent prepared by filling a container for separately holding the agent A and the agent B with the agent B comprising the aqueous composition, wherein at least one of the agent A and the agent B is A two-pack bleach containing a nonionic surfactant represented by formula (I) and having a cloud point of 27 to 90 ° C. ^{R 1 -O- (R 2 -O)} m - (R 3 -O) n H (I) wherein, R ¹ is straight or branched chain alkyl group having 8 to 20 carbon atoms, R ² is ethylene Group, R ³ represents a propylene group,
m and n each represent an integer of 0 to 20, m and n are not 0 at the same time, and-(R ² -O)-group and-(R
^{The 3-} O)-groups may be bonded randomly. ] 2. A mixture prepared by mixing equal amounts of agent A and agent B.
The two-component bleaching agent according to claim 1, which has a pH at 0 ° C of 9.5 to 11.0.