Oxygen bleach composition

Abstract

To provide an oxygen-based bleaching agent composition more excellent in bleaching power.SOLUTION: The oxygen-based bleaching agent composition comprises an oxygen-based bleaching component (A) and a surfactant (B) which is a nonionic surfactant containing a butyleneoxy group.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to oxygen bleach compositions. [Background technology]

[0002] Bleaching agents are very effective in removing stains that cannot be removed with regular detergents. Bleaching agents can be broadly divided into chlorine bleaches and oxygen bleaches. Chlorine bleaches have strong bleaching power, but they have problems with stability and odor, and because of their strong bleaching power, care must be taken when using them. On the other hand, oxygen bleaches have the advantage that, although their bleaching power is inferior to chlorine bleaches, they are relatively stable and easy to handle.

[0003] In order to improve the bleaching power of oxygen bleaches, attempts have been made to incorporate various ingredients. For example, bleaching agent compositions in which a surfactant is added to an oxygen bleach have been proposed (see, for example, Patent Documents 1 to 4).

[0004] When oxygen bleaches are used, the oxygen bleaching ingredients contained in the oxygen bleaches react with water and decompose to produce hydrogen peroxide, which has bleaching properties. For example, sodium percarbonate, a typical oxygen bleaching ingredient, reacts with water and decomposes into hydrogen peroxide and sodium carbonate. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 11-35986 [Patent Document 2] Japanese Patent Application Laid-Open No. 2004-2734 [Patent Document 3] Japanese Patent Application Laid-Open No. 2005-187743 [Patent Document 4] Japanese Patent Application Laid-Open No. 2011-26456 Summary of the Invention [Problem to be solved by the invention]

[0006] There is a need for oxygen bleaching compositions with superior bleaching power.

[0007] The present invention has been made in view of the above-mentioned current situation, and an object of the present invention is to provide an oxygen bleaching agent composition having superior bleaching power. [Means for solving the problem]

[0008] As a result of intensive research aimed at solving the above-mentioned problems, the present inventors have found that an oxygen-based bleaching agent composition containing a specific surfactant containing a butyleneoxy group, together with an oxygen-based bleaching component, exhibits a particularly remarkable bleaching power. This led to the realization that the above-mentioned problems can be solved brilliantly, and has led to the completion of the present invention.

[0009] That is, the present invention (1) is an oxygen bleaching agent composition characterized by containing an oxygen bleaching component (A) and a nonionic surfactant containing a butyleneoxy group (B).

[0010] The reason why the oxygen bleaching agent composition of the present invention has excellent bleaching power is unclear, but is presumed to be as follows. By containing butyleneoxy groups, the surfactant (B) can further reduce interfacial tension and reduce it quickly. This allows the bleaching agent component and the dye to come into contact more easily, increasing bleaching power or facilitating the transfer of the dye into water. The reason why the interfacial tension can be reduced so quickly is thought to be due to the fact that micelles formed by the surfactant containing butyleneoxy groups are easily collapsed.

[0011] The present invention (2) is characterized in that the surfactant (B) is represented by the following formula (1): R 1 O-(AO) n -R 2 (1) (In formula (1), R 1 represents an alkyl group having 8 to 18 carbon atoms. 2 represents hydrogen, an alkyl group, or a benzyl group. (AO) nwherein AO are the same or different and represent an ethyleneoxy group, a propyleneoxy group, or a butyleneoxy group, and at least one is a butyleneoxy group. n represents the average number of moles of AO added and is a number of 1 to 20.)

[0012] When the surfactant (B) is a specific one containing a butyleneoxy group, the effect of improving the bleaching power in the oxygen bleach composition becomes more pronounced.

[0013] The present invention (3) is the oxygen bleaching agent composition of the present invention (1) or (2), wherein the oxygen bleaching component (A) is at least one selected from the group consisting of percarbonates, perborates, and persulfates. When the oxygen bleaching component (A) is at least one selected from the group consisting of percarbonates, perborates, and persulfates, the effects of the present invention become more pronounced.

[0014] The present invention (4) is directed to the surfactant (B), wherein in formula (1), the (AO) n In the oxygen bleach composition of any one of the present inventions (1) to (3), AO each represents an ethyleneoxy group or a butyleneoxy group, at least one of which is a butyleneoxy group, and n is a number of 2 or more and 20 or less. When the (poly)oxyalkylene group of the surfactant (B) is composed of only butyleneoxy groups or of ethyleneoxy groups and butyleneoxy groups, the effects of the present invention become more pronounced. [Effects of the Invention]

[0015] The oxygen bleaching agent composition of the present invention has excellent bleaching power. DETAILED DESCRIPTION OF THE INVENTION

[0016] The oxygen bleaching agent composition of the present invention will be specifically described below. However, the present invention is not limited to the following embodiments, and can be appropriately modified and applied within the scope of the present invention.

[0017] The oxygen bleaching agent composition of the present invention is characterized by containing an oxygen bleaching component (A) and a surfactant (B) which is a nonionic surfactant containing a butyleneoxy group.

[0018] <Oxygen bleaching ingredient (A)> The oxygen bleaching component (A) is usually a component that generates hydrogen peroxide in an aqueous solution, and is preferably at least one selected from the group consisting of percarbonates, perborates, and persulfates. Among these, from the viewpoint of achieving superior bleaching power, the oxygen bleaching component (A) is more preferably a percarbonate and / or a persulfate.

[0019] Examples of the percarbonate include ammonium percarbonate, lithium percarbonate, sodium percarbonate, potassium percarbonate, calcium percarbonate, and magnesium percarbonate. Among these, alkali metal percarbonates are preferred, and sodium percarbonate is more preferred. Examples of the perborates include ammonium perborate, lithium perborate, sodium perborate, potassium perborate, calcium perborate, and magnesium perborate. Of these, alkali metal salts of perboric acid are preferred, and sodium perborate is more preferred. Examples of the persulfate include ammonium persulfate, lithium persulfate, sodium persulfate, potassium persulfate, calcium persulfate, and magnesium persulfate. Among these, alkali metal persulfates are preferred, and sodium persulfate is more preferred.

[0020] In the oxygen bleaching agent composition of the present invention, the shape of the oxygen bleaching component (A) is not particularly limited, but is preferably granular with an average particle size of 0.1 to 2.0 mm, more preferably granular with an average particle size of 0.2 to 1.0 mm. When the oxygen bleaching component (A) is in a granular form, it is not in a powder form and therefore has excellent flowability. When the average particle size of the oxygen bleaching component (A) is within the above range, it is more suitable for long-term storage and also more easily soluble in water when used.

[0021] In this specification, the "average particle size" is defined as follows. First, an image is taken using an optical microscope at a magnification (e.g., 20 to 30 times) such that at least 10 particles are completely within the field of view. Next, the length of the longest part of the particle is defined as the "particle size of the particle," and the "particle size of the particle" is measured for all particles in the image. The arithmetic mean of the particle sizes obtained for each particle is defined as the "average particle size."

[0022] In 100% by mass of the oxygen bleaching composition of the present invention, the mass proportion of the oxygen bleaching component (A) is preferably 15% by mass or more, more preferably 30% by mass or more, even more preferably 40% by mass or more, and particularly preferably 45% by mass or more. The mass proportion of the oxygen bleaching component (A) is preferably 99 mass % or less, more preferably 95 mass % or less, and even more preferably 90 mass % or less. When the oxygen bleaching composition of the present invention contains a plurality of oxygen bleaching components (A), the mass proportion of the oxygen bleaching component (A) is the total mass proportion of the oxygen bleaching components (A).

[0023] <Surfactant (B)> The surfactant (B) is a nonionic surfactant containing a butyleneoxy group as a hydrophilic group. The hydrophilic group preferably contains two or more butyleneoxy groups, more preferably three or more, even more preferably four or more, and particularly preferably five or more butyleneoxy groups. The hydrophilic group containing a butyleneoxy group may be one composed only of butyleneoxy groups, or one composed of butyleneoxy groups and other hydrophilic groups such as ethyleneoxy groups, propyleneoxy groups, etc. Among these, the hydrophilic group preferably contains an alkyleneoxy group other than butyleneoxy groups together with butyleneoxy groups, and more preferably contains, for example, an ethyleneoxy group and / or a propyleneoxy group together with butyleneoxy groups. The surfactant (B) preferably has a (poly)oxyalkylene chain in which the average number of moles of oxyalkylene groups added is from 1 to 20. The average number of moles added is preferably 2 or more, more preferably 3 or more, even more preferably 4 or more, and particularly preferably 5 or more. The average number of moles added is preferably 15 or less. The hydrophobic group contained in the surfactant (B) is preferably a hydrocarbon group. The number of carbon atoms in the hydrocarbon group is preferably 8 to 18. The number of carbon atoms is more preferably 9 or more, and even more preferably 10 or more. The number of carbon atoms is more preferably 17 or less, and even more preferably 16 or less. The hydrocarbon group may be an alkyl group or an alkenyl group, with an alkyl group being preferred. The alkyl group and the alkenyl group may each be primary, secondary, or tertiary.

[0024] The surfactant (B) is not particularly limited as long as it is a nonionic surfactant containing a butyleneoxy group, and examples thereof include (poly)oxyalkylene alkyl ethers containing butyleneoxy groups and (poly)oxyalkylene alkyl amines containing butyleneoxy groups. Among these, (poly)oxyalkylene alkyl ether surfactants represented by the above formula (1) are preferred. The (poly)oxyalkylene alkyl ether is an oxyalkylene alkyl ether and / or a polyoxyalkylene alkyl ether. The (poly)oxyalkylene alkylamine is an oxyalkylene alkylamine and / or a polyoxyalkylene alkylamine.

[0025] R in the above formula (1) 1 represents an alkyl group having 8 to 18 carbon atoms, preferably 9 or more, more preferably 10 or more. Also, preferably 17 or less, more preferably 16 or less. 2 represents hydrogen, an alkyl group, or a benzyl group, preferably hydrogen, an alkyl group having 1 to 4 carbon atoms, or a benzyl group, more preferably hydrogen, an alkyl group having 1 to 3 carbon atoms, or a benzyl group, and more preferably hydrogen or an alkyl group having 1 to 2 carbon atoms. Above R 1 , R 2 The alkyl group in may be a primary alkyl group, a secondary alkyl group, or a tertiary alkyl group.

[0026] (AO) shown in the above formula (1) n In the formula, AO are the same or different and represent an ethyleneoxy group, a propyleneoxy group, or a butyleneoxy group, and of the n AOs, at least one is a butyleneoxy group, preferably at least two are butyleneoxy groups, more preferably at least three are butyleneoxy groups, even more preferably at least four are butyleneoxy groups, and particularly preferably at least five are butyleneoxy groups. Of the n AO groups, the number of butyleneoxy groups may be n or less.

[0027] Furthermore, of the n AOs, at least one may be an ethyleneoxy group, at least two may be ethyleneoxy groups, at least three may be ethyleneoxy groups, at least four may be ethyleneoxy groups, or at least five may be ethyleneoxy groups. Of the n AO groups, the number of ethyleneoxy groups may be n-1 or less.

[0028] Furthermore, of the n AOs, at least one may be a propyleneoxy group, at least two may be propyleneoxy groups, at least three may be propyleneoxy groups, at least four may be propyleneoxy groups, or at least five may be propyleneoxy groups. Of the n AOs, the number of propyleneoxy groups may be n-1 or less.

[0029] For example, (AO) shown in the above formula (1) n In one preferred embodiment of the present invention, AO represents an ethyleneoxy group or a butyleneoxy group. In addition, (AO) shown in the above formula (1) n In another preferred embodiment of the present invention, AO represents a propyleneoxy group or a butyleneoxy group.

[0030] n is a number between 1 and 20, preferably 2 or more, more preferably 3 or more, even more preferably 4 or more, and particularly preferably 5 or more. Also, n is preferably 15 or less.

[0031] In addition, (AO) shown in the above formula (1) n In the formula, the ratio of the total of ethyleneoxy groups and propyleneoxy groups to butyleneoxy groups (ratio of average number of moles added) is preferably 0 to 98:2 to 100, more preferably 5 to 96:4 to 95, more preferably 10 to 94:6 to 90, and even more preferably 20 to 92:8 to 80.

[0032] In addition, (AO) shown in the above formula (1) nIn the above, the ratio of ethyleneoxy groups, propyleneoxy groups, and butyleneoxy groups is preferably 0-98:0-98:2-100, more preferably 0-96:0-96:4-95, still more preferably 0-94:0-94:6-90, and particularly preferably 0-92:0-92:8-80.

[0033] In addition, (AO) n The order in which the butyleneoxy groups and the ethyleneoxy groups and / or propyleneoxy groups are arranged is not particularly limited, and may be, for example, randomly arranged, alternately arranged, or arranged in a block pattern, but is preferably, for example, randomly arranged.

[0034] The (poly)oxyalkylene alkyl ether surfactant is an oxyalkylene alkyl ether surfactant and / or a polyoxyalkylene alkyl ether surfactant.

[0035] The cloud point of the surfactant (B) is preferably 70° C. or lower, more preferably 60° C. or lower, and even more preferably 55° C. or lower. Although the lower limit of the cloud point is not particularly limited, it is preferably −20° C. or higher. The surfactant (B) contains a butyleneoxy group which has a relatively low hydrophilicity, and therefore tends to have a relatively low hydrophilicity and a low cloud point. The cloud point is the temperature at which a 1% by mass aqueous solution of surfactant (B) is placed in a test tube, heated as necessary to form a uniform, transparent solution, and then gradually cooled to become cloudy.

[0036] The surfactant (B) may be, for example, a hydrophobic group (e.g., R 1 ) is an alkyl group having 8 to 18 carbon atoms, has a (poly)oxyalkylene chain as a hydrophilic group in which the average number of moles of oxyalkylene groups added (for example, n in formula (1)) is 1 to 20, and has a cloud point of 70°C or lower.

[0037] The mass proportion of the surfactant (B) in 100 mass% of the oxygen bleach composition of the present invention is preferably 0.1 mass% or more, more preferably 0.3 mass% or more, and even more preferably 0.5 mass% or more. The mass proportion of the surfactant (B) is preferably 25 mass % or less, more preferably 20 mass % or less, even more preferably 15 mass % or less, and particularly preferably 10 mass % or less. When the oxygen bleach composition of the present invention contains a plurality of surfactants (B), the mass proportion of the surfactant (B) is the total mass proportion of the surfactants (B). The surfactant (B) can exhibit excellent bleaching power even at a relatively low concentration.

[0038] In the oxygen bleaching agent composition of the present invention, the mass ratio of the oxygen bleaching component (A) to the surfactant (B) is not particularly limited, but is preferably 500:1 to 1:1, more preferably 450:1 to 2:1, even more preferably 200:1 to 3:1, and even more preferably 120:1 to 4:1.

[0039] <Alkaline agent (C)> The oxygen bleach composition of the present invention may further contain an alkaline agent (C).

[0040] The alkaline agent (C) is preferably at least one selected from the group consisting of alkali metal carbonates, alkaline earth metal carbonates, alkali metal silicates, alkaline earth metal silicates, alkali metal phosphates, alkaline earth metal phosphates, alkali metal hydroxides, and alkaline earth metal hydroxides.

[0041] Examples of carbonates include sodium carbonate, potassium carbonate, and calcium carbonate. Examples of silicates include sodium orthosilicate, potassium orthosilicate, sodium metasilicate, potassium metasilicate, and calcium silicate. Examples of phosphates include sodium tripolyphosphate, trisodium phosphate, tripotassium phosphate, sodium pyrophosphate, potassium pyrophosphate, potassium polyphosphate, and calcium phosphate. Examples of hydroxides include sodium hydroxide, potassium hydroxide, and calcium hydroxide.

[0042] When the oxygen bleach composition of the present invention contains an alkaline agent (C), the mass proportion of the alkaline agent (C) in 100% by mass of the oxygen bleach composition of the present invention is preferably 1% by mass or more, more preferably 3% by mass or more, even more preferably 4% by mass or more, and particularly preferably 5% by mass or more. The mass proportion of the alkaline agent (C) is preferably 45 mass % or less, more preferably 40 mass % or less, and even more preferably 35 mass % or less. When the oxygen bleach composition of the present invention contains a plurality of alkaline agents (C), the above mass proportion of the alkaline agent (C) refers to the total mass proportion of the alkaline agents (C).

[0043] In the oxygen bleaching agent composition of the present invention, the mass ratio of the oxygen bleaching component (A) to the alkaline agent (C) is not particularly limited, but is preferably 100:1 to 2:3, more preferably 50:1 to 1:1, even more preferably 100:3 to 9:8, and particularly preferably 15:1 to 9:7.

[0044] The oxygen bleach composition of the present invention may further comprise a bulking agent. Examples of the bulking agent include anhydrous sodium sulfate, sodium sulfate decahydrate (mirabilite), potassium sulfate, powdered silica, etc., and one or more of these can be used. The mass proportion of the extender in 100% by mass of the oxygen bleach composition of the present invention can be, for example, 0 to 70% by mass, and is preferably 1 to 60% by mass.

[0045] The oxygen bleach composition of the present invention may further contain components (hereinafter referred to as "other components") that are contained in ordinary oxygen bleach compositions, such as surfactants other than the surfactant (B), chelating agents, enzymes, acidifying agents, fragrances, colorants, anti-caking agents, defoaming agents, bleach activators, etc.

[0046] The surfactant other than the surfactant (B) is not particularly limited, but may be, for example, at least one surfactant selected from the group consisting of a nonionic surfactant other than the surfactant (B), a cationic surfactant, an amphoteric surfactant, and an anionic surfactant.

[0047] Examples of nonionic surfactants other than the surfactant (B) include polyoxyethylene alkyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene alkylamines, polyoxyethylene polyoxypropylene alkylamines, fatty acid alkanolamides, polyoxyalkylene fatty acid alkanolamides, polyoxyalkylene fatty acid esters, polyoxyalkylene sorbitan fatty acid esters, glycerin fatty acid esters, polyglycerin fatty acid esters, sorbitan fatty acid esters, sucrose fatty acid esters, alkyl (poly)glucosides, polyoxyalkylene methyl ether fatty acid esters, propylene glycol fatty acid esters, polyoxyalkylene alkylamines, fatty acid diethanolamides, and Quillaja saponin, which have a hydrocarbon group with 9 or more carbon atoms. The alkyl(poly)glucoside refers to an alkyl glucoside and / or an alkyl polyglucoside.

[0048] Examples of the cationic surfactants include tetraalkylammonium salts, dialkylmethylpolyoxyethylammonium salts, alkylbenzyldimethylammonium salts, cetylpyridinium salts, and alkyldimethylhydroxyethylammonium salts, and the like, in which the alkyl group has 9 or more carbon atoms.

[0049] Examples of the amphoteric surfactant include alkyl betaines, alkyl amino betaines, alkyl amido betaines, alkyl amido propyl betaines, alkyl hydroxy sulfobetaines, alkyl amine oxides, and alkyl amido amine oxides, which have an alkyl group with 9 or more carbon atoms.

[0050] Examples of the anionic surfactants include fatty acids (salts), alkyl ether carboxylates, alkanesulfonates, α-olefinsulfonates, α-sulfofatty acid ester salts, alkylbenzenesulfonates, alkylsuccinates, alkyl sulfates, alkyl sulfate ester salts, alkyl ether sulfate ester salts, polyoxyalkylene alkyl ether acetates, and polyoxyalkylene alkyl ether sulfate ester salts, which have a hydrocarbon group having 9 or more carbon atoms.

[0051] The chelating agent is not particularly limited, and one or more selected from the group consisting of aminocarboxylic acid chelating agents, hydroxycarboxylic acid chelating agents, phosphoric acid chelating agents, polyacrylic acid and its salts, acrylic acid-maleic acid copolymers, and ether carboxylates can be used.

[0052] Examples of aminocarboxylic acid chelating agents include methylglycine diacetic acid (MGDA), ethylenediaminetetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), nitrilotriacetic acid (NTA), hydroxyethylethylenediaminetriacetic acid (HEDTA), triethylenetetraminehexaacetic acid (TTHA), dicarboxymethylglutamic acid (GLDA), hydroxyethyliminodiacetic acid (HIDA), dihydroxyethylglycine (DHEG), 1,3-propanediaminetetraacetic acid (PDTA), 1,3-diamino-2-hydroxypropanehexaacetic acid (DPTA-OH), and salts thereof. Examples of hydroxycarboxylic acid chelating agents include citric acid, gluconic acid, malic acid, succinic acid, lactic acid, tartaric acid, and salts thereof (for example, sodium salts, potassium salts, etc.). Examples of the phosphoric acid-based chelating agent include tripolyphosphoric acid (STPP), hydroxyethylidene diphosphonic acid (HEDP), nitrilotrimethylene phosphonic acid (NTMP), phosphonobutanetricarboxylic acid (PBTC), hexametaphosphoric acid, and salts thereof.

[0053] Enzymes can be classified based on their reactivity and include hydrolases, oxidoreductases, lyases, transferases, and isomerases. Specific examples include proteases, esterases, lipases, nucleases, cellulases, amylases, and pectinases, and one or more of these can be used.

[0054] In 100% by mass of the oxygen bleach composition of the present invention, the mass proportion of other components is preferably 40% by mass or less, more preferably 30% by mass or less, and even more preferably 20% by mass or less. The oxygen bleach composition of the present invention may also be substantially free of other components.

[0055] The oxygen bleach composition of the present invention preferably has a pH of 8 to 13, more preferably 9 to 12.5, and even more preferably 9.8 to 12.1, in a 1% by mass aqueous solution at 25°C. The pH is measured by the method described in the Examples.

[0056] The oxygen bleach composition of the present invention preferably has an effective oxygen concentration of 1 to 12.5%, more preferably 2 to 12%, even more preferably 3 to 11.5%, and even more preferably 3.6 to 9.6%. The effective oxygen concentration is measured by the method described in the Examples.

[0057] The oxygen bleach composition of the present invention may be in the form of a solid (powder, granules (granular), pills, tablets, flakes, blocks, etc.) or a liquid, preferably a solid. The oxygen bleach composition of the present invention can be used in the same manner as conventional oxygen bleaches. [Example]

[0058] Examples will be given below to explain the present invention more specifically, but the present invention is not limited to these examples.

[0059] <<Examples 1 to 38, Comparative Examples 1 and 2>> Oxygen bleach compositions were prepared and evaluated according to the compositions shown in Tables 1 to 4. The manufacturers of the compounds shown in the tables are as follows:

[0060] <Oxygen bleaching ingredient (A)> Sodium percarbonate: Sodium percarbonate manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. Sodium perborate: Sodium peroxoborate tetrahydrate manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. Sodium persulfate: Sodium peroxodisulfate manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.

[0061] <Surfactant (B)> Polyoxyethylene polyoxybutylene secondary alkyl ether (C12-14) (cloud point 40-49°C): TERGITOL LF-45 manufactured by The Dow Chemical Company Polyoxyethylene polyoxybutylene secondary alkyl ether (C12-14) (cloud point 26-34°C): THE DOW CHEMICAL COMPANY TERGITOL LF-30 Polyoxyethylene polyoxybutylene secondary alkyl ether (C12-14) (cloud point 17-24°C): THE DOW CHEMICAL COMPANY TERGITOL LF-20 Polyoxyethylene polyoxybutylene alkyl ether (cloud point 32°C): THE DOW CHEMICAL COMPANY DOWFAX 20B 102 (having ethylene oxide groups, butyleneoxy groups, and propyleneoxy groups) Polyoxyethylene polyoxybutylene alkyl ether (C13-15) (cloud point 42°C): Plurafac LF220, BASF Japan Ltd. Polyoxyethylene polyoxybutylene alkyl ether (C13-15) (cloud point 34°C): Plurafac LF221, BASF Japan Ltd. Polyoxyethylene polyoxybutylene alkyl ether (C13-15) (cloud point 10-15°C): Plurafac LF223, BASF Japan Ltd. Polyoxyethylene polyoxybutylene alkyl ether (C13-15) (cloud point 4°C or less): BASF Japan Ltd. Plurafac LF224 Polyoxyethylene polyoxybutylene alkyl ether (C13-15) (cloud point 28°C): Plurafac LF120, BASF Japan Ltd. Polyoxyethylene polyoxybutylene decyl ether (cloud point 45-55°C): EO / BO = 90 / 10 Polyoxypropylene polyoxybutylene secondary alkyl ether (cloud point 10-20°C): PO / BO=75 / 25 Polyoxyethylene polyoxybutylene decyl ether (cloud point 20-29°C): EO / BO = 80 / 20 Polyoxyethylene polyoxybutylene stearyl ether (cloud point below 4°C): EO / BO = 60 / 40 Polyoxyethylene polyoxybutylene alkyl benzyl ether (C13-15) (cloud point 4°C or less): R in the above formula (1) 2 corresponds to the benzyl group

[0062] <Other surfactants (B')> Polyoxyethylene tridecyl ether (EO 10 mol): Aoki Oil & Fat Industries Co., Ltd. Finesurf TD-100 Polyoxyethylene polyoxypropylene tridecyl ether (EO:PO=70:30) Mw=550: Aoki Oil & Fat Co., Ltd. Wonder Surf S-800

[0063] <Alkaline agent (C)> Sodium carbonate: Fujifilm Wako Pure Chemical Industries, Ltd. Tripotassium phosphate: Fujifilm Wako Pure Chemical Industries, Ltd. Sodium metasilicate: Fujifilm Wako Pure Chemical Industries, Ltd.

[0064] <Chelating agent (D)> Tetrasodium ethylenediaminetetraacetate: Tetrasodium ethylenediaminetetraacetate tetrahydrate, manufactured by Tokyo Chemical Industry Co., Ltd. Sodium polyacrylate: Sokaran PA25CL manufactured by BASF Japan Ltd., weight average molecular weight 4000 Sodium gluconate: Sodium gluconate manufactured by Tokyo Chemical Industry Co., Ltd.

[0065] <Other ingredients> Sodium sulfate: Fujifilm Wako Pure Chemical Industries, Ltd. All components shown in the table are pure amounts (mass%).

[0066] Each evaluation was carried out as follows.

[0067] <ph> The pH of a 1% by mass aqueous solution of each composition was measured at 25° C. using a pH meter F-53 (manufactured by Horiba, Ltd.) according to JIS Z-8802:2011 "pH measurement method." The results are shown in Tables 1 to 4 below.

[0068] <Available oxygen concentration> The available oxygen concentration was measured using a standard aqueous solution of potassium permanganate as follows: Alternatively, the available oxygen concentration can also be measured by the method described in JIS L0889 Appendix A. 1000 ml of ion-exchanged water was placed in a 1-liter glass beaker, and 10 g of the oxygen bleach composition was added. The mixture was stirred for 10 minutes and allowed to stand for 5 minutes. Then, 10 g of the mixture was weighed on an electronic balance and placed in a 200 ml Erlenmeyer flask. 70 ml of 2.8% aqueous sulfuric acid solution was added. The solution was titrated with a 1 / 10 N aqueous potassium permanganate solution, and the endpoint was when a pale pink color appeared. This reaction is represented as follows: 2MnO4 - +5H2O2+6H + →2Mn2 + +5O2+8H2O The effective oxygen concentration in the oxygen bleaching agent composition was determined from the titration amount of potassium permanganate.

[0069] <Evaluation of bleaching power> (Evaluation of bleaching power against tea stains) The bleaching power of the oxygen bleaching agent compositions according to the examples and comparative examples against tea stains was evaluated by the following method. (1) Preparing stained melamine dishes 40 tea bags (Nittoh Tea DAY&DAY TEA BAG) were placed in 6 L of water and heated until boiling. After boiling, heating was stopped to prepare a tea solution. Next, melamine tableware (Sanshin Chemical Industries, Ltd.: MS-543 LNA square-compartment dish) with a rough surface due to long-term use was placed in the black tea solution and immersed for 8 hours to deposit black tea pigment stains. (2) Bleaching of pigment stains 400 g of water was placed in a 500 mL beaker and heated to 70°C in a water bath. The oxygen bleach compositions according to the Examples and Comparative Examples were added and dissolved to a concentration of 0.4% by weight to prepare an aqueous oxygen bleach solution. Thereafter, the melamine tableware on which the black tea color stains were deposited was immersed in the aqueous oxygen bleach solution for 20 minutes to bleach the black tea color stains. (3) Evaluation of bleaching power The color of the melamine tableware after bleaching was visually inspected and evaluated according to the following evaluation criteria. The results are shown in Tables 1 to 4 below. 〇: More than 80% of the tea pigment has been removed. △: More than 50% but less than 80% of the black tea pigment has been removed. ×: The black tea pigment is hardly removed. If the rating is △ or higher, the evaluation result is good.

[0070] (Evaluation of bleaching power against curry stains) The bleaching power of the oxygen bleaching agent compositions according to the examples and comparative examples against curry stains was evaluated by the following method. (1) Preparing melamine tableware with curry stains Add 920g of curry roux (House Foods Vermont Curry Medium Spicy) to 4L of water and bring to a boil. Next, melamine tableware (Sanshin Chemical Co., Ltd.: MS-543 LNA square-divided dish) with a rough surface due to long-term use was placed in a boiling curry solution and simmered for 3 hours to deposit curry pigment stains. (2) Bleaching of pigment stains 400 g of water was placed in a 500 mL beaker and heated to 40°C in a water bath. The oxygen bleach composition according to each Example and Comparative Example was added and dissolved to a concentration of 1% by weight to prepare an aqueous oxygen bleach solution. Thereafter, the melamine tableware on which the curry pigment stains had been deposited was immersed in the aqueous oxygen bleach solution for 40 minutes to bleach the curry pigment stains. (3) Evaluation of bleaching power The color of the melamine tableware after bleaching was visually inspected and evaluated according to the following evaluation criteria. The results are shown in Tables 1 to 4 below. 〇: More than 70% of the curry pigment has been removed. △: Curry pigment has been removed by 40% or more but less than 70%. ×: Almost no curry pigment has been removed. If the rating is △ or higher, the evaluation result is good.

[0071] [Table 1]

[0072] [Table 2]

[0073] [Table 3]

[0074] [Table 4]

[0075] As shown by the results of each example, the oxygen-based bleach compositions of Examples 1 to 38, which contain an oxygen-based bleaching component (A) and a surfactant (B) containing a butyleneoxy group, were able to exhibit extremely excellent bleaching power.< / ph>

Claims

1. an oxygen-based bleaching component (A); and a butyleneoxy group-containing nonionic surfactant (B).

2. The surfactant (B) is represented by the following formula (1): R １ O-(AO) ｎ -R ２ (1) (In formula (1), R １ represents an alkyl group having 8 to 18 carbon atoms. ２ represents hydrogen, an alkyl group, or a benzyl group. (AO) ｎ wherein AO are the same or different and represent an ethyleneoxy group, a propyleneoxy group, or a butyleneoxy group, and at least one is a butyleneoxy group. n represents the average number of moles of AO added and is a number of 1 to 20.

3. 3. The oxygen bleach composition according to claim 1, wherein the oxygen bleaching component (A) is at least one selected from the group consisting of percarbonates, perborates, and persulfates.

4. In the surfactant (B), in formula (1), the (AO) ｎ 3. The oxygen bleaching agent composition according to claim 1, wherein each AO represents an ethyleneoxy group or a butyleneoxy group, at least one of which is a butyleneoxy group, and n is a number of 2 or more and 20 or less.

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