JPH1150095A - Bleaching activator and bleaching detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a bleaching activator having a high beaching activation effect and not causing the damage of fibers and the decoloration of dyes by using a specific cobalt complex. SOLUTION: This bleaching activator comprises a cobalt (III) complex of the formula: [CoDm Xn ]<z> Yq [D is a ligand containing one or more nitrogen atoms as one or more coordinating atoms, preferably a bidentate ligand, such as ethylene diamine, o-phenanthroline, etc.; (m) is 1, 2, 3; X is a monodentate ligand; (n) is an integer of 0-4; (z) is a complex valency exhibiting the total electric charge of the cobalt and the ligand; Y is a counter ion; (q) is an integer satisfying the equation: (a)×(q)=-(z), when the valency of Y is (a)]. A bleaching detergent composition comprises (A) hydrogen peroxide and a peroxide generating the hydrogen peroxide in an aqueous solution, and (B) the bleaching activator. The content of the component B in the composition is preferably 0.0001-5.0 wt.%. The composition can exhibit an excellent bleaching activity effect also at low temperatures.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bleach activator and a bleaching detergent composition containing the same, and more particularly, to a peroxide or an organic peroxide which generates hydrogen peroxide in hydrogen peroxide or an aqueous solution. A bleach activator for activating a bleach using such an organic peroxy compound, particularly a bleach activator having an excellent bleach activating effect even at low temperatures, and a bleaching detergent composition containing the same It is.

[0002]

2. Description of the Related Art It is a known art to use a peroxy bleach such as hydrogen peroxide for washing for a long time. This peroxy bleach is used at high temperatures and is effective in removing tea, coffee, wine and fruits. However, the effect of peroxy bleach is 60 ° C
At lower temperatures below, it drops extremely. It is also known that common transition metal ions catalyze the decomposition of hydrogen peroxide and peroxides that generate hydrogen peroxide such as sodium perborate and sodium percarbonate. A method of activating a peroxy compound using a transition metal ion together with a chelating agent in order to obtain a sufficient bleaching effect at a low temperature is disclosed (US Pat. No. 3,156,654). However, not all combinations of transition metals and chelating agents are considered effective in activating peroxy bleach, and in fact, many combinations are known to be ineffective or rather counterproductive to bleaching effects. In order for a transition metal to be effective as a bleach activation catalyst in a bleaching detergent composition, it is necessary that the transition metal does not decompose a peroxy compound in a route not involved in bleaching and does not undergo irreversible oxidation. I know that.

[0003] From such a viewpoint, it has been attempted to utilize some transition metal compounds for the activation of bleaching agents. For example, Japanese Patent Publication No. 7-65074 discloses a method using a binuclear manganese complex having a nitrogen-containing macrocyclic ligand. A preferred compound as a manganese complex is MnIV [μ-O ₃
(1,4,7-trimethyl-1,4,7-triazacyclononane) ₂ (PF ₆ ) ₂ ], but producing such a complex ligand is costly and time consuming. Not easy to use. Further, the bleaching detergent composition having such a manganese complex has a problem that the fiber is damaged and the dye is decolorized.

[0004] US Pat. No. 4,810,410 discloses a method utilizing a cobalt ammine complex.
In this specification, (Co (NH ₃ ) ₅ Cl) Cl ₂ is described as a preferred cobalt ammine complex.However, in these cobalt complexes, the fiber is damaged, and the problem of causing the decolorization of the dye is solved. Not reached.

Accordingly, an object of the present invention is to provide a bleaching activator and a bleaching detergent composition which have a high bleaching activating effect and do not cause fiber damage or dye discoloration.

[0006]

The inventors of the present invention have conducted intensive studies and found that a certain type of cobalt complex can solve the above-mentioned problems, and have completed the present invention. That is, the present invention provides a cobalt (I) represented by the following general formula (1).
II) To provide a bleach activator comprising a complex.

[CoD _m X _n ] ^z Y _q (1) (where D is a ligand having a nitrogen atom as a coordinating atom, m is 1, 2 or 3 and X is a monodentate ligand. , N is an integer of 0 to 4, z is the valence of the complex representing the total charge of cobalt and the ligand, Y is a counter ion, and q is a × when the valence of Y is a. In addition, the present invention provides (a) hydrogen peroxide or a peroxide that generates hydrogen peroxide in an aqueous solution, and (b) a compound represented by the general formula (1). An object of the present invention is to provide a bleaching detergent composition comprising a bleaching activator comprising a cobalt (III) complex represented by the formula:

[0008]

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

The bleach activator of the present invention has the general formula (1)
In the general formula (1), preferred as the monodentate ligand X are halogen atoms such as chlorine, bromine and iodine, carboxyl groups such as acetic acid, hydroxyl groups, water, ammonia, alkyl such as methylamine and the like. Amines and the like.

In the general formula (1), the ligand D having a nitrogen atom as a coordinating atom is preferably a didentate, tridentate or tetradentate ligand, and particularly preferably a didentate ligand. Ligand D
Examples of ethylene diamine, o-phenanthroline, 2,2'-dipyridine, 2,2'-dipyrazine, 2,2'-
Dipiperidine, o-phenylenediamine, 1,2-cyclohexanediamine, 4,4′-dimethyl-2,2′-dipyridine, bidentate ligands such as 2-picolylamine are preferred, and particularly preferred. Ethylenediamine,
o-phenanthroline, 2,2′-dipyridine, 2,2′-dipyrazine, more preferably ethylenediamine, o-phenanthroline, 2,2′-dipyridine.

[0011] As the counter ion Y, when z is ^{positive, Cl -, Br -, I} -, NO 3 -, NCS -, ClO 4 -, OH -
When z is negative, a counter anion such as an alkali metal, an alkaline earth metal, or an alkylammonium salt can be used.

Specific examples of the cobalt (III) complex represented by the above general formula (1) according to the present invention include tris (ethylenediamine) cobalt (III) chloride and trans-dichlorobis (ethylenediamine) cobalt (III) chloride. Stuff·
Acid salt, tris (1,10-phenanthroline) cobalt (I
II) Chloride and tris (dipyridine) cobalt (III) perchlorate.

The bleaching detergent composition of the present invention comprises (a) hydrogen peroxide or a peroxide which generates hydrogen peroxide in an aqueous solution, and (b) cobalt (III) represented by the general formula (1). It contains a bleach activator consisting of a complex.

In the bleaching detergent composition according to the present invention, (b)
The content of the component, that is, the content of the bleach activator comprising the cobalt (III) complex represented by the general formula (1) is 0.0001 to 5.0% by weight.
Is preferably, and more preferably 0.0005 to 1.0% by weight.

The component (a) in the bleaching detergent composition of the present invention is hydrogen peroxide or a peroxide that generates hydrogen peroxide in an aqueous solution, but a peroxide that generates hydrogen peroxide in an aqueous solution. Examples thereof include inorganic peroxide salts such as alkali metal borates, percarbonates, perphosphates and persulfates, and mixtures thereof may be used. Particularly preferred are sodium perborate and sodium percarbonate.

The content of the component (a) in the bleaching detergent composition of the present invention is preferably from 0.3 to 95% by weight, more preferably from 0.5 to 90% by weight.

The bleaching detergent composition of the present invention may further contain a surfactant as the component (c). Examples of the surfactant used in the present invention include an anionic surfactant, a nonionic surfactant, a cationic surfactant, and an amphoteric surfactant. Examples of the anionic surfactant include alkyl benzene sulfonate, alkyl ether sulfate, alkyl sulfate, α-olefin sulfonate, α-sulfofatty acid ester salt, alkane sulfonate, saturated or unsaturated fatty acid salt, alkyl or Examples thereof include alkenyl ether carboxylate, amino acid type surfactant, N-acyl amino acid type surfactant, alkyl or alkenyl phosphate and salts thereof. Particularly suitable anionic surfactants for use in the present invention are alkylbenzene sulfonates having 10 to 18 carbon atoms in the alkyl group, alkyl sulfates having 10 to 18 carbon atoms in the alkyl group or 12 to 18 carbon atoms in the fatty acid. Α-sulfofatty acid methyl sodium salt. As the counter ion, sodium, potassium and ammonium are preferred, and sodium and potassium are particularly preferred.

The nonionic surfactant used in the present invention includes, for example, polyoxyalkylene alkyl or alkenyl ether having 10 to 18 carbon atoms, polyoxyethylene alkyl phenyl ether, higher fatty acid alkanolamide, or an alkylene oxide adduct thereof. ,
Examples include sucrose fatty acid esters, alkyl glycosides, fatty acid glycerin monoesters, and alkylamine oxides. Examples of the cationic surfactant used in the present invention include a quaternary ammonium salt type surfactant, and examples of the amphoteric surfactant include a sulfobetaine type surfactant and a carbobetaine type surfactant. Can be

As these surfactants, anionic surfactants or nonionic surfactants are particularly preferred.
The content of the component (c) in the bleaching detergent composition of the present invention is preferably 50% by weight or less, more preferably 0.5 to 35% by weight.
It is.

The bleaching detergent composition of the present invention comprises, as a component (d), a bleaching activator or a bleaching activity other than a bleaching activator comprising a cobalt (III) complex represented by the above general formula (1). Species can be included. Examples of the bleaching activator or bleaching active species of the component (d) include a compound that reacts with hydrogen peroxide to generate an organic peracid (hereinafter abbreviated as an organic peracid precursor) or an organic peracid or a salt thereof. Can be

Examples of the organic peracid precursor used in the present invention include esters such as acylphenol sulfonate, acyloxybenzoic acid (salt), acylalkylphenol sulfonate, and acylalkyloxybenzoic acid (salt); Acylamides, and quaternary ammonium-substituted organic peracid precursors. Specifically, 2-
(N, N, N-trimethylammonium) ethyl-4-sulfophenyl carbonate (SPCC), N-octyl-N, N −
Dimethyl-N- (10-caproyloxy) decylammonium chloride (ODC), 3- (N, N, N-trimethylammonium) propyl, sodium-4-sulfophenylcarboxylate, N, N, N-trimethylammonium tolyloxybenzene Sulfonate, sodium 4-benzoyloxybenzenesulfonate, sodium 1-methyl-2-benzoyloxybenzene-4-sulfonate,
Sodium 4-methyl-3-benzoyloxybenzoate, sodium nonanoyloxybenzenesulfonate,
Sodium decanoyloxybenzenesulfonate, sodium nonanoyloxybenzoate, sodium decanoyloxybenzoate, glucose pentaacetate, tetraacetylxylose, N, N, N ', N'-tetraacetylethylenediamine, (6-octamidocaproyl) Examples thereof include, but are not limited to, sodium oxybenzenesulfonate and sodium (6-decaneamidocaproyl) oxybenzenesulfonate.

The organic peracids or salts thereof used in the present invention include, for example, peroxybenzoic acid such as peroxy-α-naphthoic acid and peroxybenzoic acid having a substituted ring, peroxylauric acid, peroxystearic acid, Examples thereof include aliphatic, substituted aliphatic and arylalkyl monoperoxy acids such as N, N-phthaloylaminoperoxycaproic acid or salts thereof. More specifically, 1,12-diperoxide decane dicarboxylic acid,
1,9-diperoxyazelaic acid, diperoxybrassic acid, diperoxysebacic acid, diperoxyisophthalic acid, 2-decylperoxybutane-1,4-dioic acid,
Examples include, but are not limited to, 6-octylamino-6-oxo-peroxyhexanoic acid, 4,4'-sulfonylbisperoxybenzoic acid, and salts thereof.

The content of the component (d) in the bleaching detergent composition of the present invention is preferably from 0.1 to 30% by weight, more preferably from 0.5 to 20% by weight.
Is more preferred.

The bleaching detergent composition of the present invention may contain a sequestering agent as component (e). Examples of the sequestering agent include the following compounds, but are not particularly limited. For example, orthophosphate,
Phosphate such as pyrophosphate, tripolyphosphate, hexametaphosphate, phytate, ethane-1,1-diphosphonic acid, ethane-1,1,2-triphosphonic acid, ethane-1
-Hydroxy-1,1-diphosphonic acid and its derivatives, ethane-1,1,2-hydroxytriphosphonic acid, ethane-1,
2-dicarboxy-1,2-diphosphonic acid, salts of phosphonic acids such as methanehydroxyphosphonic acid, 2-phosphonobutane-2,3,4-tricarboxylic acid, 1-phosphonobutane-2,
3,4-tricarboxylic acid, salts of phosphonocarboxylic acids such as α-methylphosphonosuccinic acid, aspartic acid, glutamic acid, salts of amino acids such as glycine, nitrilotriacetate,
Aminopolyacetates such as iminodiacetate, ethylenediaminetetraacetate, diethylenetriaminepentaacetate, glycoletherdiaminetetraacetate, hydroxyethyliminodiacetate, triethylenetetramine hexaacetate, diencoric acid, polyacrylic acid, polymethacrylic acid Polyelectrolytes such as polyhydroxyacrylic acid, polyfumaric acid, polymaleic acid, acrylic acid / maleic acid copolymer, poly-α-hydroxyacrylic acid, polyacetalcarboxylic acid or salts thereof, diglycolic acid, oxydisuccinic acid, carboxymethyloxy Succinic acid, citric acid, lactic acid, tartaric acid, oxalic acid, malic acid, oxydisuccinic acid,
Organic acid salts such as gluconic acid, carboxymethyl succinic acid, and carboxymethyl tartaric acid (in this case, alkali metal salts are preferable), zeolites, aluminosilicates, and the like.

The content of the component (e) in the bleaching detergent composition of the present invention is preferably 30% by weight or less, more preferably 0.1 to 20% by weight.

The bleaching detergent composition of the present invention includes magnesium sulfate, magnesium silicate, magnesium chloride, magnesium silicofluoride, which are known as peroxide stabilizers.
Magnesium salts such as magnesium oxide, silicates such as sodium silicate, and tin compounds such as stannate can be used. If necessary, carboxymethylcellulose, polyvinylpyrrolidone, anti-redeposition agent such as polyethylene glycol, protease, lipase, amylase, enzymes such as cellulase, optical brightener, dye, pigment,
Flavors can be added.

The bleach activator and bleach detergent composition of the present invention can be used as a detergent for clothing, a bleach for clothing, a hard surface detergent, an automatic dishwashing detergent, a denture detergent and the like. It can also be used for hair bleaching, and also for industrial applications such as bleaching wood pulp.

Further, the bleaching activator of the present invention may be formulated by a known method such as extrusion granulation or tumbling granulation using a fatty acid or polyethylene glycol by a known method. For example, it is desirable to use as particles having a particle size of about 100 μm to 1000 μm.

[0029]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Production Examples and Examples, but the present invention is not limited to these Examples. The percentages in the examples are on a weight basis unless otherwise specified.

Production Example 1 25 ml of water was placed in a 100 ml four-necked flask equipped with an air inlet tube.
l, Cobalt chloride hexahydrate 8.0 g (0.033 mol) was added,
Then a solution of 20% 30% ethylenediamine in 5.7 ml of 6M hydrochloric acid was added. Air was passed through the resulting solution at room temperature for 4 hours, followed by filtration. The obtained solution was concentrated on a 70 ° C. water bath, and further cooled to room temperature. 5 ml of concentrated hydrochloric acid
10 ml of ethanol was added, and the precipitated crystals were washed with ethanol and ether, air-dried, and tris (ethylenediamine)
Cobalt (III) chloride (hereinafter abbreviated as compound (1-1)) was obtained as orange crystals.

Production Example 2 25 m water in a 100 ml four-necked flask equipped with an air inlet tube
l, 8.0 g (0.033 mol) of cobalt chloride hexahydrate was added, followed by 30 g of 10% ethylenediamine, and air was passed through at room temperature overnight. After adding 7.5 ml of concentrated hydrochloric acid to this,
The mixture was concentrated on a water bath at 70 ° C., and further cooled to room temperature. The obtained green crystals are collected by filtration, pulverized finely, washed with ethanol and ether, air-dried, and trans-dichlorobis (ethylenediamine) cobalt (III) chloride / acid salt (hereinafter, referred to as
Compound (1-2)).

Production Example 3 30 equipped with a thermometer, a cooling pipe and a mechanical stirrer
0ml 4-neck flask with chloropentaamminecobalt (I
II) 4.0 g (0.016 mol) of chloride, 9.7 g (0.049 mol) of 1,10-phenanthroline monohydrate, 70 ml of water, 30 ml of methanol
g was added and heated under reflux for 10 hours. After cooling, concentrate,
It was left still. The resulting yellow crystals were collected by filtration, recrystallized from water / ethanol, washed with ethanol, and tris (1,10
-Phenanthroline) cobalt (III) chloride (hereinafter abbreviated as compound (1-3)) was obtained.

Production Example 4 30 equipped with a thermometer, a cooling pipe and a mechanical stirrer
0g Cobalt chloride hexahydrate 3.6g in a four-necked flask
(0.015 mol), water 75 ml, 2,2′-dipyridine 7.1 g (0.04
5 mol) and heated to 60 ° C. to dissolve. A 35% aqueous hydrogen peroxide solution was added dropwise to the resulting solution. 15 ml of concentrated hydrochloric acid was added to the obtained orange solution, and the mixture was concentrated on a 70 ° C. water bath.
75 ml of water and 15 ml of 60% perchloric acid were added to the obtained green slurry. The obtained yellow precipitate is collected by filtration, recrystallized from hot water, and the obtained crystals are washed with ethanol to give tan crystals of tris (dipyridine) cobalt (III) perchlorate (hereinafter referred to as compound ( 1-4)).

Examples 1-4 and Comparative Examples 1-2 Using the cobalt (III) complex obtained in Production Examples 1-4 as a bleach activator, the bleaching performance was measured by the following method. For comparison, the bleaching performance was similarly measured for those using a cobalt complex [Co (H ₂ O) ₆ ] Cl ₂ manufactured by Wako Pure Chemical Industries, Ltd. and those not using a bleaching activator. . Table 1 shows the results.

<Bleaching Performance Measurement Method> (1) Preparation of Soiled Cloth Bilirubin (manufactured by Merck) 0.03 g was dissolved in 100 cc of chloroform, and 0.06 cc of the solution was dropped evenly on an 8 cm × 8 cm cotton cloth. After drying, a bilirubin-contaminated cloth was prepared.

(2) Measurement of bleaching performance Sodium percarbonate was dissolved in 300 ml of water at 25 ° C. so that the available oxygen became 0.05%.
m, washed by immersion and bleaching for 30 minutes using the five bilirubin-contaminated cloths prepared above, washed with water, and dried.

The reflectance at 420 nm of the obtained stained cloth after bleaching washing, stained cloth before bleaching washing, and original cotton cloth was measured with NDR-101DP manufactured by Nippon Denshoku Industries Co., Ltd. The bleaching rate was determined by the equation.

[0038]

(Equation 1)

[0039]

[Table 1]

Examples 5 to 10 and Comparative Examples 3 to 5 Compounds (1-1) to (1-4) obtained in Preparation Examples 1 to 4 as sodium percarbonate, a cobalt (III) complex according to the present invention,
As a comparative cobalt complex, [Co (H ₂ O) ₆ ] Cl ₂ (manufactured by Wako Pure Chemical Industries, Ltd.) and a Mn complex (MnIV [μ-O ₃ (1,4, 7-trimethyl-1,4,7-triazacyclononane) ₂ (PF ₆ ) ₂ ] and [Co (NH ₃ ) ₅ Cl] Cl
₂ (synthesized in accordance with Experimental Chemistry Course 17 (edited by The Chemical Society of Japan)), the following surfactants (c-1) to (c-2) and (d-1) ) To (d-3), using the following (e-1) to (e-2) and sodium sulfate as a sequestering agent,
A bleaching detergent composition having the composition shown in Table 2 was prepared. The obtained bleaching detergent composition was evaluated for bleaching performance and bleaching property by the following methods. Table 2 shows the results.

<Surfactant> (c-1): Sodium alkyl (C ₁₂ ) benzenesulfonate (c-2); Polyoxyethylene (EO = 9) lauryl ether <Bleaching activator of component (d)>

[0042]

Embedded image

<Sequestering Agent>(e-1); sodium polyacrylate (molecular weight: 8,000) (e-2); 1-hydroxyethylidene-1,1-diphosphonic acid tetrasodium salt (trade name: Dequest 2016) < Bleaching performance measurement method> 500 cc of ion-exchanged water is placed in a 1 liter beaker, and the bleaching detergent composition shown in Table 2 is placed in the beaker.
After stirring at 0 rpm for 1 minute, 5 pieces of bilirubin-contaminated cloth prepared in the same manner as in Example 1 were put in, dipped and bleached for 30 minutes, washed with water and dried, and the bleaching ratio was determined in the same manner as in Example 1. The bleaching detergent composition had a concentration of 5 g / 5 liter.

<Method for evaluating bleaching property> 10 g of the bleaching detergent composition was dissolved in 2 liters of tap water, and a test cloth prepared by the following method was soaked for about 30 minutes. After that, wash with water, dehydrate,
Drying was performed. The same treatment was performed using a commercially available bleach (Wide Height, manufactured by Kao Corporation) instead of the bleaching detergent composition. Repeat this process 20 times,
Evaluation was made according to the following criteria.

Preparation of bleaching test cloth 100% cotton knit smooth and mercerized
I. Reactive Red 41 is dyed with a full color so as to have a concentration of 4% with respect to the cloth, and this is washed with ordinary water and soaped.
After pressing, a 10 × 10 cm test cloth was obtained.

Criteria 1 ... Equivalent to commercial bleaching agent 2 ... Slightly bleached than commercial bleaching agent 3 ... Decolorized from commercial bleaching agent 4 ... Decolorized considerably from commercial bleaching agent 5 … Significantly bleached compared to commercial bleach

[0047]

[Table 2]

Examples 11 to 16 and Comparative Examples 6 to 7 Sodium percarbonate, compounds (1-1) to (1-4) obtained in Preparation Examples 1 to 4 as cobalt (III) complexes according to the present invention,
[Co (H ₂ O) ₆ ] Cl ₂ (manufactured by Wako Pure Chemical Industries, Ltd.) was used as a comparative cobalt complex, and (c-
1) to (c-2) and the following (c-3) to (c-4), (d-1), (d-3) and following
(d-4), used in the above examples as a sequestering agent (e-1) ~
(e-2) and other components shown in Table 3 were used,
A bleaching detergent composition having the composition shown in Table 3 was prepared. The obtained bleaching detergent composition was evaluated for bleaching performance and bleaching property by the following methods. Table 3 shows the results.

<Surfactant>(c-3); sodium lauryl sulfate (c-4); fatty acid soap (C ₁₂ , sodium salt) <Bleaching activator of component (d)>

[0050]

Embedded image

<Method of Measuring Bleaching Performance> (1) Preparation of Black Tea Cloth 80 g of Nitto Black Tea (yellow package) was boiled with 3 liters of ion-exchanged water for about 15 minutes, rubbed with bleached cotton after desizing, and added to this liquid. Cotton gold cloth # 2003 was dipped and boiled for about 15 minutes. It was taken out of the fire and left for about 2 hours, taken out and air-dried, washed with water until the color of the liquor was no longer colored, dehydrated, pressed and subjected to an experiment as a 10 × 10 cm test piece.

(2) Measurement of bleaching performance Each of the bleaching detergent compositions shown in Table 3 was 25 g.
Dissolve in 30 liters of tap water and add the above tea-contaminated cloth 10
The sheets were washed in a washing machine, then rinsed with tap water, dried, and the bleaching ratio was calculated in the same manner as described above.

<Evaluation method of bleaching property> 10 g of the bleaching detergent composition was dissolved in 2 liters of tap water, and a test cloth prepared by the following method was immersed for about 30 minutes. After that, wash with water, dehydrate,
Drying was performed. The same treatment was performed using a commercially available detergent (Attack manufactured by Kao Corporation) instead of the bleaching detergent composition. Such a process was repeated 20 times and evaluated according to the following criteria.

Preparation of decolorized test cloth 100% cotton knit smooth, mercerized
I. Reactive Red 41 is dyed with a full color so as to have a concentration of 4% with respect to the cloth, and this is washed with ordinary water and soaped.
After pressing, a 10 × 10 cm test cloth was obtained.

Criteria 1 ... Equivalent to a commercially available powder detergent 2 ... Slightly decolorized than a commercially available powder detergent 3 ... Decolored from a commercially available powder detergent 4 ... Substantially decolorized than a commercially available powder detergent 5 … Significantly bleached compared to commercial powder detergents

[0056]

[Table 3]

Note) * 1 Tinopearl CBS: Optical brightener manufactured by Ciba-Geigy

Continued on the front page (51) Int.Cl. ⁶ Identification code FI C11D 3: 395)

Claims (8)

[Claims] Claims: 1. A cobalt (I) represented by the following general formula (1):
II) A bleach activator comprising a complex. [CoD _m X _n ] ^z Y _q (1) (where D is a ligand having a nitrogen atom as a coordinating atom, m is 1, 2 or 3, X is a monodentate ligand, and n is An integer of 0 to 4, z represents the valence of the complex representing the total charge of cobalt and the ligand, Y represents a counter ion, and q represents a × q = − when the valence of Y is a. It is an integer that satisfies z.) 2. The bleaching activator according to claim 1, wherein D in the formula (1) is a bidentate ligand. 3. A bleaching activator according to claim 1, wherein in the general formula (1), D is ethylenediamine, o-phenanthroline or 2,2′-dipyridine. 4. It contains (a) hydrogen peroxide or a peroxide that generates hydrogen peroxide in an aqueous solution, and (b) a bleach activator according to any one of claims 1 to 3. A bleaching detergent composition comprising: 5. The bleaching detergent composition according to claim 4, further comprising a surfactant as the component (c). 6. The bleaching detergent composition according to claim 4, further comprising a bleaching activator or a bleaching active species other than the bleaching activator according to claim 1 as the component (d). Stuff. 7. The bleaching detergent composition according to claim 6, wherein the component (d) is a compound which reacts with hydrogen peroxide to generate an organic peracid or an organic peracid or a salt thereof. 8. The bleaching detergent composition according to claim 4, further comprising a sequestering agent as component (e).