Cleaning agent

Abstract

The present invention addresses the problem of providing a cleaning agent that exhibits excellent cleaning performance and little change in viscosity despite changes in temperature. This problem can be solved by a cleaning agent comprising: component A, a nonionic surfactant (other than component B); component B, a polyoxyethylene-polyoxypropylene glycol; component C, an abrasive; and component D, a thickener.

Description

[Technical Field]

[0001] This invention relates to a cleaning agent. [Background technology]

[0002] In industrial settings, cleaning agents containing surfactants and water-insoluble abrasives are used to remove stubborn contaminants such as cutting oils and greases from the skin of hands and feet. These cleaning agents require both good cleaning performance and a pleasant user experience, and various studies are being conducted to improve these aspects.

[0003] For example, Patent Document 1 discloses a body cleansing cosmetic that does not leave a sticky feeling after use, characterized by containing a polyoxyalkylene ether-based nonionic surfactant having a hydrophilic group consisting of polyoxyethylene residues and oxypropylene residues, and synthetic polymer scrub particles.

[0004] Furthermore, Patent Document 2 discloses a body cleansing agent containing a copolymer of (meth)acrylic acid and (meth)acrylic acid ester, a biodegradable abrasive, and polyoxyethylene polyoxypropylene propylheptyl ether, with the aim of reducing the slimy feeling during washing and improving rinsability.

[0005] Furthermore, Patent Document 3 discloses a body cleansing agent that is excellent at cleaning dirt derived from engine oil and cutting oil, and contains a polyoxyethylene polyoxypropylene propylheptyl ether-based nonionic surfactant having an inorganic value of 350 to 500, an organic value of 400 to 550, and an average number of added moles of oxypropylene residues of 2.5 or less, and an abrasive. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2006-16402 [Patent Document 2] Japanese Patent Publication No. 2012-233128 [Patent Document 3] Japanese Patent Publication No. 2019-189820 [Overview of the project] [Problems that the invention aims to solve]

[0007] Although the aforementioned cleaning agents have excellent effects, there is still room for improvement in their cleaning power. Furthermore, if the viscosity of the cleaning agent changes significantly depending on the temperature, problems may arise during use. Therefore, the present invention aims to provide a cleaning agent that has excellent cleaning power and exhibits minimal viscosity change even when the temperature changes. [Means for solving the problem]

[0008] As a result of diligent research by the present inventors, it has been discovered that by using a specific combination of surfactants, it is possible to provide a detergent that has excellent cleaning power and exhibits minimal viscosity changes even when temperature changes.

[0009] The present invention includes the following embodiments. [1] Ingredient A: Nonionic surfactant (except for ingredient B below), Ingredient B: Polyoxyethylene polyoxypropylene glycol, Component C: Abrasive material, and Ingredient D: Thickener, A cleaning agent containing [this ingredient]. [2] The detergent according to [1], wherein component A has a polyoxyethylene group. [3] The detergent according to [1] or [2], wherein component A has a polyoxypropylene group. [4] The aforementioned component A has a hydrophobic portion, The cleaning agent according to any one of [1] to [3], wherein the number of carbon atoms in the hydrophobic portion is 8 to 18. [5] The cleaning agent according to [4], wherein the hydrophobic part has 8 to 10 carbon atoms. [6] The cleaning agent according to any one of [1] to [5], wherein the component A is a polyoxyalkylene alkyl ether-based nonionic surfactant. [7] The polyoxyalkylene alkyl ether-based nonionic surfactant is represented by the formula (1) or formula (2): (R)-O-(PO) , , m , , , , , , , , l , n , , , , , -(EO) y -H···(1) (R)-O-(EO) y -(PO) x [[ID=​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​A cleaning agent represented by [1] to

[10] .

[12] The detergent according to

[11] , wherein m in formula (3) is an integer such that the average molecular weight of the polyoxypropylene groups is between 1000 and 3000.

[13] The detergent according to

[11] or

[12] , wherein n and l in formula (3) are integers such that the total ethylene oxide content is between 1% by mass and 30% by mass.

[14] The detergent according to any one of [1] to

[13] , wherein the total content of component A and component B is 1% by mass to 20% by mass, based on the mass of the detergent.

[15] The detergent according to

[14] , wherein the content of component B based on the mass of the detergent is 1.0% to 2.5% by mass, and the content of component B based on the total mass of component A and component B is 10% to 30% by mass.

[16] A cleaning agent according to any one of [1] to

[15] , wherein the rate of change of viscosity at 30°C to 50°C relative to the viscosity at 25°C is in the range of 0.2 to 2.0.

[17] A cleansing agent for use on the body, as described in any of [1] to

[16] .

[18] A cleaning agent for washing away oily stains, as described in any of [1] to

[17] .

[19] The cleaning agent according to any one of [1] to

[18] , wherein the average particle size of the abrasive material is 1 μm to 700 μm.

[20] The cleaning agent according to any one of [1] to

[19] , wherein the abrasive material comprises biodegradable particles. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a detergent that has excellent cleaning power and exhibits little change in viscosity even when the temperature changes. [Modes for carrying out the invention]

[0011] The embodiments of the present invention will be described in detail below, but the present invention is not limited to these, and various modifications are possible without departing from the spirit of the invention.

[0012] <Cleaning agent> One embodiment of the present invention relates to a cleaning agent containing the following components A to D. Component A: Nonionic surfactant (excluding component B below) Component B: Polyoxyethylene polyoxypropylene glycol Component C: Abrasive material Ingredient D: Thickener

[0013] By using components A and B in combination, cleaning power can be improved and temperature-dependent viscosity changes can be suppressed. When the viscosity of a cleaning agent changes with temperature, for example, if the viscosity increases, problems arise such as the cleaning agent becoming difficult to dispense from the container. On the other hand, if the viscosity decreases, the fluidity of the cleaning agent increases, making it difficult to retain the cleaning agent on the soiled area, resulting in problems such as ineffective cleaning. Since the cleaning agent according to this embodiment suppresses temperature-dependent viscosity changes, these problems can be avoided.

[0014] In the cleaning agent according to this embodiment, the rate of change in viscosity at 30°C to 50°C relative to the viscosity at 25°C is preferably in the range of 0.2 to 2.0, more preferably in the range of 0.6 to 1.5, and particularly preferably in the range of 0.9 to 1.2. Within this range, the viscosity change is small under the temperature conditions in which it is normally used, and it is possible to have excellent handling and cleaning properties. The aforementioned rate of change is determined by measuring the viscosity in 5°C increments between 25°C and 50°C, and calculating the rate of change from the viscosity at 25°C (viscosity at a specific temperature / viscosity at 25°C) for the viscosity between 30°C and 50°C. It is sufficient if the rate of change at all measured temperatures falls within the above range.

[0015] The cleaning agent according to this embodiment preferably has a viscosity at 25°C of 3,000 mPa·s to 16,000 mPa·s, more preferably 5,000 mPa·s to 13,000 mPa·s, and even more preferably 7,000 mPa·s to 11,000 mPa·s. By setting the viscosity of the cleaning agent within the above range, the advantage of being easy to use regardless of the season is obtained.

[0016] (Component A) The detergent according to this embodiment contains component A (nonionic surfactant (excluding component B)). By using component A in combination with component B (polyoxyethylene polyoxypropylene glycol), the cleaning power can be improved and temperature-dependent viscosity changes can be suppressed.

[0017] Component A preferably has a polyoxyethylene group. Component A preferably has a polyoxypropylene group. Component A more preferably has both a polyoxyethylene group and a polyoxypropylene group.

[0018] Component A preferably has a hydrophobic portion, and the number of carbon atoms in the hydrophobic portion is preferably 8 to 18, more preferably 8 to 14, and particularly preferably 8 or 10.

[0019] Component A is preferably a polyoxyalkylene alkyl ether-based nonionic surfactant (hereinafter also referred to as "surfactant a"). Surfactant a preferably has a polyoxyethylene group. Surfactant a preferably has a polyoxypropylene group. Surfactant a is more preferably has both a polyoxyethylene group and a polyoxypropylene group.

[0020] The average number of moles of oxyethylene groups added to surfactant a is preferably 1 to 10, more preferably 2 to 8, even more preferably 2 to 6, and particularly preferably 2 to 4. The average number of moles of added oxypropylene groups in surfactant a is preferably from 1 to 10, more preferably from 2 to 8, still more preferably from 2 to 6, and particularly preferably from 2 to 4. By setting the average number of moles of added oxyethylene groups and oxypropylene groups within the above range, the detergency can be further improved and the temperature-dependent viscosity change can be further suppressed. In this specification, the "average number of moles of added" means the weighted average value when the detergent contains two or more kinds of surfactant a.

[0021] Specific examples of the structure of surfactant a include, for example, the following formulas (1) and (2). (R)-O-(PO) x -(EO) y -H···(1) (R)-O-(EO) y -(PO) x -H···(2) [In the formula, R is an alkyl group, PO is an oxypropylene group, EO is an oxyethylene group, x and y are each independently a positive integer.]

[0022] In formulas (1) and (2), the alkyl group of R is preferably a linear alkyl group. In formulas (1) and (2), the number of carbon atoms of the alkyl group of R is preferably from 8 to 18, more preferably from 8 to 14, and particularly preferably 8 or 10.

[0023] (Component B) The detergent according to this embodiment contains component B (polyoxyethylene polyoxypropylene glycol). By using component B in combination with component A, the detergency can be improved and the temperature-dependent viscosity change can be suppressed.

[0024] Specific examples of the structure of component B include, for example, the following formula (3). H-(EO)n -(PO) m -(EO) l -OH(3) [In the formula, PO is an oxypropylene group, EO is an oxyethylene group, l, m, and n are each independent positive integers.

[0025] In formula (3), m is preferably a positive integer such that the average molecular weight of the polyoxypropylene groups is 1000 to 3000, more preferably a positive integer such that the average molecular weight of the polyoxypropylene groups is 1200 to 2500, and even more preferably a positive integer such that the average molecular weight of the polyoxypropylene groups is 1500 to 1900.

[0026] The average molecular weight of polyoxypropylene groups can be measured by MALDI-TOF / MS.

[0027] In formula (3), n and l are preferably positive integers such that the total ethylene oxide content is 1% by mass to 30% by mass, more preferably positive integers such that the total ethylene oxide content is 4% by mass to 20% by mass, and even more preferably positive integers such that the total ethylene oxide content is 7% by mass to 15% by mass.

[0028] The total ethylene oxide content can be measured by MALDI-TOF / MS.

[0029] When used in combination with component B, component A can exert cleaning power even with a small amount and reduce skin irritation. The total content of components A and B is preferably 1% to 20% by mass, more preferably 1% to 10% by mass, even more preferably 3% to 9% by mass, and particularly preferably 5% to 8% by mass, based on the mass of the cleaning agent. Furthermore, in order to maintain an appropriate viscosity in the general operating temperature range of the detergent at 40 to 50°C, it is preferable that the content of component B be 2.5% by mass or less, and more preferably in the range of 1.0% to 2.5% by mass, based on the mass of the detergent.

[0030] In this invention, a special effect was discovered by adjusting the blending balance of components A and B within a specific range in a system having component C (abrasive) and component D (thickener). The content of component A is preferably 50% to 94% by mass, more preferably 60% to 92% by mass, and even more preferably 70% to 90% by mass, based on the total mass of components A and B. Within this range, the degree of temperature-dependent change in the viscosity of the resulting detergent can be reduced, which is useful.

[0031] The content of component B is preferably 6% to 50% by mass, more preferably 8% to 40% by mass, and even more preferably 10% to 30% by mass, based on the total mass of component A and component B.

[0032] (Other surfactants) The cleaning agent of this embodiment may further contain surfactants other than components A and B, to the extent that they do not adversely affect its effectiveness. Examples of other surfactants include cationic surfactants, amphoteric surfactants, and anionic surfactants.

[0033] Examples of cationic surfactants include ammonium-based surfactants such as alkyltrimethylammonium chloride, alkyldimethylbenzylammonium chloride, dialkyldimethylammonium chloride, alkyltrimethylammonium bromide, alkylpentaethoxyammonium chloride, lanolin ethyl sulfate aminopropylethyldimethylammonium, and cationized cellulose; amide-based surfactants such as acyldiethylaminoethylamide, acyldimethylaminopropylamide, and polyoxyethylene fatty acid amide; and myristyldimethylamine oxide.

[0034] Examples of amphoteric surfactants include betaine-based surfactants such as alkyldimethylaminoacetic acid betaine and acylamidopropyldimethylaminoacetic acid betaine, which have 13 or more carbon atoms in the fatty acid residue; imidazolinium-based surfactants such as N-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, N-alkyl-N-carboxymethyl-N-hydroxyethylethylenediamine lauryl sulfate and its salts; glycine-based surfactants such as polyoctyl polyaminoethylglycine; and aminopropionic acid-based surfactants such as alkylaminopropionic acid and alkylaminodipropionic acid.

[0035] Examples of anionic surfactants include sodium soap with 17 or fewer carbon atoms; amino acid-based surfactants such as acyl sarcosines and their salts, acyl amino acids and their salts, acylated peptides and their salts, etc., where the fatty acid residue has 17 or fewer carbon atoms; polyoxyalkylene adducts such as polyoxyethylene alkyl ether carboxylic acid and its salts, polyoxyethylene alkyl ether sulfate and its salts, polyoxyethylene alkyl ether sulfonic acid and its salts; phosphoric acid-based surfactants such as alkyl phosphate and its potassium salts and alkanolamine salts, polyoxyethylene alkyl ether phosphate and its salts; sulfosuccinate-based surfactants such as dialkyl sulfosuccinate and its salts, polyoxyethylene alkyl sulfosuccinate ether and its salts; alkylphenol-based surfactants such as alkylphenol ether phosphate esters and their salts; and sodium laureth sulfate.

[0036] The content of other surfactants is preferably 0% to 15% by mass, more preferably 0% to 10% by mass, and even more preferably 0% to 5% by mass, based on the mass of the detergent.

[0037] (Component C) The cleaning agent according to this embodiment contains component C (abrasive). The abrasive is also called a scrubbing agent. By using the abrasive, the cleaning power is enhanced by the physical friction effect, and dirt can be adsorbed onto the particle surface. The abrasive is not particularly limited, and conventionally known abrasives can be appropriately selected and used. Examples of abrasives include inorganic particles such as porous silica particles, crystalline cellulose particles, cellulose-based particles such as cellulose acetate particles and chitosan / cellulose / starch mixture particles, walnut shell particles, corn cob particles, apricot kernel particles, polyhydroxybutyrate particles, poly(hydroxybutyrate / hydroxyhexanoate) particles, esterified starch particles, cellulose, cellulose acetate particles, chitosan / cellulose / starch mixture particles, polybutylene succinate particles, polybutylene succinate adipate particles, polylactic acid particles, polyethylene succinate particles, polycaprolactone resin particles, polyglycolic acid particles, polytetramethylene adipate-co-terephthalate particles, polybutylene adipate-terephthalate particles, polybutylene succinate-co-adipate-co-terephthalate particles, polybutylene succinate carbonate particles, polybutylene succinate-terephthalate particles, polyethylene particles, and the like. Abrasive materials may be used individually or in combination of two or more types. The cleaning agent according to this embodiment may or may not contain anhydrous silicic acid.

[0038] Abrasives are preferably made of biodegradable particles. Biodegradable particles tend to have superior decomposition properties when released into the environment, resulting in improved environmental suitability. Examples of biodegradable particles include walnut shell particles, corn cob particles, apricot kernel particles, polyhydroxybutyrate particles, poly(hydroxybutyrate / hydroxyhexanoate) particles, esterified starch particles, cellulose, cellulose acetate particles, chitosan / cellulose / starch mixture particles, polybutylene succinate particles, polybutylene succinate adipate particles, polylactic acid particles, polyethylene succinate particles, polycaprolactone resin particles, polyglycolic acid particles, polytetramethylene adipate-co-terephthalate particles, polybutylene adipate-terephthalate particles, polybutylene succinate-co-adipate-co-terephthalate particles, polybutylene succinate carbonate particles, and polybutylene succinate-terephthalate particles.

[0039] The average particle size of the abrasive material is preferably 1 μm to 700 μm, more preferably 50 μm to 400 μm, and even more preferably 100 μm to 300 μm. By setting the average particle size of the abrasive material within the above range, the cleaning power tends to improve. The average particle size can be measured in accordance with JIS Z 8801 using a dry particle size distribution analyzer (such as the Robot Shifter RPS-105M manufactured by Seishin Corporation).

[0040] The abrasive content is preferably 1% to 20% by mass, more preferably 2% to 7% by mass, and even more preferably 3% to 5% by mass, based on the mass of the cleaning agent. A cleaning power tends to be improved when the abrasive content is 1% by mass or more. Furthermore, a cleaning power can be reduced when the abrasive content is 20% by mass or less, as this reduces physical irritation when used on the body.

[0041] (Component D) The cleaning agent according to this embodiment contains component D (thickener). Examples of thickeners include synthetic polymers and natural polymers.

[0042] Examples of synthetic polymers include carboxyvinyl polymers, acrylic acid / alkyl methacrylate copolymers, polyvinyl alcohol, polyvinylpyrrolidone, carboxyalkyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose hydroxypropyltrimethylammonium chloride ether, methyl cellulose, ethyl cellulose, hydroxypropyl cellulose, methylhydroxypropyl cellulose, propylene glycol alginate ester, methoxyethylene maleic anhydride copolymer, polydimethylmethylene piperidinium chloride, polyvinyl acetate, polyvinyl alcohol, polyvinylpyrrolidone, polyvinyl methyl ether, nitrocellulose, polyethylene glycol fatty acid esters, polyoxyethylene fatty acid esters such as polyethylene glycol distearate, and polyoxyethylene fatty acid ester methyl glycosides such as polyoxyethylene dioleate methyl glucoside.

[0043] Examples of natural polymers include starch, soluble starch, carboxymethyl starch, methyl starch, cellulose, gelatin, gum arabic, xanthan gum, guar gum, locust bean gum, quince seed, carrageenan, galactan, pectin, mannan, dextran, succinoglucan, curdlan, casein, albumin, and collagen.

[0044] The content of the thickener is preferably 0.1% to 5.0% by mass, more preferably 0.15% to 1.0% by mass, and even more preferably 0.2% to 0.5% by mass, based on the mass of the cleaning agent. By setting the thickener content to 0.1% by mass or more, the stability of the cleaning agent (e.g., suppression of separation, prevention of abrasive sedimentation) can be improved. Furthermore, by setting the thickener content to 5.0% by mass or less, the cleaning agent can be easily dispensed from the container.

[0045] (optional ingredient) The cleaning agent according to this embodiment may further contain other optional components in addition to components A to D. Examples of optional components include pH adjusters, humectants, and solvents. Water is preferred as the solvent.

[0046] (pH adjuster) By using pH adjusters, skin irritation can be reduced. pH adjusters are not particularly limited as long as they are commonly used in cleansing applications, but examples include inorganic substances such as sodium hydroxide, potassium hydroxide, and aqueous ammonia; and organic amines such as trimethylamine, diethanolamine, diethylamine, and triethanolamine.

[0047] The pH adjusting agent content is preferably 0.1 to 20% by mass, more preferably 0.15 to 5.0% by mass, and even more preferably 0.2 to 3.0% by mass, based on the mass of the detergent.

[0048] (Moisturizer) Using moisturizers can prevent skin irritation caused by excessive degreasing, thereby improving the user experience. Moisturizers are not particularly limited as long as they are commonly used in cleansing products, but examples include trimethylglycine, glycerin, hyaluronic acid, urea, uric acid, ammonia, lecithin, lanolin, squalane, squalene, glucosamine, creatinine, and nucleic acid-related substances such as DNA and RNA.

[0049] The content of the moisturizer is preferably 0.01 to 20% by mass, more preferably 0.03 to 10% by mass, and even more preferably 0.05 to 5% by mass, based on the mass of the cleansing agent.

[0050] <Application> The cleaning agent according to this embodiment is preferably used on the body. The body part is not particularly limited, but it is preferably used on the hands. The cleaning agent according to this embodiment is preferably used to clean oil stains. The type of oil stain is not particularly limited, but examples include stains from engine oil, grease, cutting oil, etc. [Examples]

[0051] The present invention will be described in more detail below using examples and comparative examples, but the technical scope of the present invention is not limited thereto.

[0052] <Manufacturing of cleaning agents> Each component shown in Tables 1 and 2 below (the units of the values ​​in the tables are in mass%) was weighed into a beaker to a total volume of 500g, and stirred with a magnetic stirrer for 15 minutes to obtain a detergent. The cleaning power, viscosity change rate, and scrubbing sensation of the obtained detergent were evaluated as shown below.

[0053] <Method for evaluating cleaning agents> (Cleaning power) A model stain was prepared by mixing 1 part by mass of activated carbon powder (Wako Pure Chemical Industries, Ltd.) with 9 parts by mass of the following oil stains. [Grease stains] Water-insoluble cutting fluid: BM405 (Yushiro Chemical Industry Co., Ltd.) Engine oil: TRUSCO 4-cycle engine oil, Viscosity: SAE 10W-40 (TRUSCO Nakayama Co., Ltd.) Grease: Unilube DL No.1 (Kyodo Yushi Co., Ltd.) Cutting fluid mixture: A mixture of water-soluble cutting fluids recovered from machine tools. (Water-soluble cutting fluid + grease)

[0054] Two pieces of white artificial leather (Royal Leatherna, Color: White) were prepared. One piece was coated with the aforementioned model stain (Artificial Leather A), and the other was coated with a cleaning agent (Artificial Leather B). Using a Martindale abrasion tester (manufactured by JAMES H. HEAL & CO. LTD. HALIFAX ENGLAND), artificial leathers A and B were rubbed together under a test load of 9 kPa for 50 seconds. Afterwards, artificial leather A was rinsed under running water for 10 seconds without rubbing its surface. Finally, the remaining stain on artificial leather A was examined using the image analysis software "Scion". Specifically, the remaining black stain originating from the model stain on the white artificial leather was quantified on a brightness scale from 0 (low cleaning effectiveness) to 255 (high cleaning effectiveness) to evaluate the cleaning power. The brightness was calculated as the average value across the entire surface of the artificial leather. The evaluation criteria are as follows. [Evaluation Criteria] A: Brightness between 200 and 255 B: Brightness is between 100 and 200 C: Brightness is between 0 and 100

[0055] (Viscosity change rate) 50 ml of detergent was placed in a beaker, and the temperature was adjusted to 25°C, 30°C, 35°C, 40°C, 45°C, and 50°C in a constant temperature bath. The viscosity at each temperature was measured using an RVDV-I prime B-type viscometer (Brookfield) with a spindle No. 5 at 20 rpm. Among the viscosities at 30°C, 35°C, 40°C, 45°C, and 50°C, the viscosity with the largest difference from the viscosity at 25°C was selected, and the rate of change from the viscosity at 25°C (viscosity with the largest difference from the viscosity at 25°C among the viscosities from 30 to 50°C / viscosity at 25°C) was calculated. The evaluation criteria are as follows. [Evaluation Criteria] A: Viscosity change rate is between 0.9 and 1.2. B: Viscosity change rate is 0.6 or more and 0.9 or less, or 1.2 or more and 1.5 or less. C: Viscosity change rate is 0.2 or more and 0.6 or less, or 1.5 or more and 2.0 or less. D: Viscosity change rate is less than 0.2 or 2.0 or higher.

[0056] (Scrub-like feeling) Ten panelists were asked to wash their hands using a cleansing agent, and their evaluation of the scrubbing sensation during handwashing was conducted. The evaluation criteria were as follows: [Evaluation Criteria] A: The scrubbing sensation is very good. B: I like the scrubbing sensation. C: The scrubbing sensation is bad.

[0057] (comprehensive evaluation) Based on cleaning power, viscosity change rate, and scrubbing sensation, the overall evaluation was determined according to the following criteria. [Evaluation Criteria] A: Overall excellent B: Overall slightly above average C: Overall excellent D: Overall inferior E: Overall very poor

[0058] <Evaluation Results> The evaluation results of the cleaning agents are shown in Tables 1 and 2. [Table 1] [Table 2]

[0059] The results in Tables 1 and 2 confirm that a detergent with excellent cleaning power, viscosity change rate, and scrubbing sensation can be obtained by combining a nonionic surfactant, polyoxyethylene polyoxypropylene glycol, an abrasive, and a thickener. In Comparative Examples 1, 2, and 4, either the nonionic surfactant or polyoxyethylene polyoxypropylene glycol was not used, resulting in insufficient cleaning power and / or viscosity change rate. In Comparative Example 3, the absence of a thickener led to the problem of the abrasive settling.

Claims

1. Component A: Nonionic surfactant (excluding component B below), Ingredient B: Polyoxyethylene polyoxypropylene glycol, Component C: Abrasive material, and Ingredient D: Thickener, A cleaning agent containing, The above component A is defined by formula (1) or formula (2): (2)----(0) x -(59) y 2・・・(1) (2)--9-(59) y -(0) x -H・・・(2) [In the formula, R is an alkyl group having 8 to 10 carbon atoms. PO is an oxypropylene group, EO is an oxyethylene group, x is an integer between 2 and 4. y is an integer between 3 and 4. It is represented as, The aforementioned component B is given by formula (3): H-(EO) n-(PO) m-(EO) l-OH...(3) [In the formula, PO is an oxypropylene group, EO is an oxyethylene group, m is a positive integer such that the average molecular weight of the polyoxypropylene groups is between 1000 and 3000. n and l are positive integers such that the total ethylene oxide content is between 1% by mass and 30% by mass. A cleaning agent represented by [this symbol].

2. The detergent according to claim 1, wherein the total content of component A and component B is 1% by mass to 20% by mass, based on the mass of the detergent.

3. The detergent according to claim 2, wherein the content of component B based on the mass of the detergent is 1.0% to 2.5% by mass, and the content of component B based on the total mass of component A and component B is 10% to 30% by mass.

4. A cleaning agent according to any one of claims 1 to 3, wherein the rate of change of viscosity at 30°C to 50°C relative to the viscosity at 25°C is in the range of 0.2 to 2.

0.

5. A cleaning agent according to any one of claims 1 to 4, for use on the body.

6. A cleaning agent according to any one of claims 1 to 5 for cleaning oil stains.

7. The cleaning agent according to any one of claims 1 to 6, wherein the average particle size of the abrasive material is 1 μm to 700 μm.

8. The cleaning agent according to any one of claims 1 to 7, wherein the abrasive material includes biodegradable particles.

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