Liquid detergent composition

Abstract

To provide a liquid detergent composition that does not become clouded even at room temperature and low temperatures of -5°C, while exhibiting excellent viscosity and foaming properties.SOLUTION: A liquid detergent composition contains an amino acid-based anionic surfactant (A), betaine (B) represented by the general formula (1), and water (W). A proportion of the surfactant (A) in the composition is 5 to 20 wt.%, and a proportion of the betaine (B) in the composition is 2 to 20 wt.%. Preferably, R1 is an alkyl group or an alkenyl group having 8 to 22 carbon atoms. Also preferably, the betaine (B) includes both a betaine in which the R1 is an alkyl group or an alkenyl group with 12 or less carbon atoms, and a betaine in which the R1 is an alkyl group or an alkenyl group with 14 or more carbon atoms.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a liquid cleaning composition. [Background technology]

[0002] Conventionally, the base material of liquid detergent compositions generally contains an anionic surfactant because of its low cost and cleaning properties. As an anionic surfactant that can be blended in detergent compositions, soap-based surfactants such as fatty acid salts and sulfate-based surfactants such as sodium laureth sulfate have been used conventionally, but in recent years, due to changes in consumer preferences, there is a demand for the use of amino acid-based surfactants.

[0003] In recent years, amino acid-based surfactants having various structures have been developed in an effort to improve the usability of liquid detergent compositions (see Patent Document 1).

[0004] In addition, liquid detergent compositions are usually marketed in a moderately thickened state for ease of use. However, amino acid-based anionic surfactants generally do not thicken easily and have the problem of separation and precipitation during storage. However, a solution to the problem of thickening has been disclosed that uses an amino acid-based anionic surfactant with a specific structure (see Patent Document 2). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 63-2962 [Patent Document 2] JP 2018-188390 A DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0006] However, in conventional liquid detergent compositions such as those in Patent Documents 1 and 2, lowering the pH of the liquid detergent composition can result in cloudiness even at room temperature, poor stability at low temperatures down to -5°C, poor foaming due to the anionic surfactant becoming water-insoluble, and poor foam-breaking properties. Therefore, an object of the present invention is to provide a liquid detergent composition which does not become cloudy even at room temperature or at a low temperature of -5°C and has good viscosity and foaming properties. [Means for solving the problem]

[0007] As a result of intensive research, the inventors have found that a liquid detergent composition containing specific amounts of a specific anionic surfactant and a specific betaine (B) does not become cloudy even at room temperature or at a low temperature of -5°C, has good viscosity and foaming properties, and can solve the above-mentioned problems.

[0008] That is, the liquid detergent composition of the present invention has the following properties: <1> ~ <5> The present invention includes the above embodiment. <1> A liquid detergent composition comprising an amino acid-based anionic surfactant (A), a betaine (B) represented by the following general formula (1), and water (W), wherein the proportion of the activator (A) in the composition is 5 to 20% by weight, the proportion of the betaine (B) in the composition is 2 to 20% by weight, and R of the betaine (B) is 1 A liquid cleaning composition having at least two types of alkyl or alkenyl groups. [ka] (R in formula (1) 1 is an alkyl group or an alkenyl group. <2> R 1 is an alkyl or alkenyl group having 8 to 22 carbon atoms; <1> The liquid cleaning composition according to claim 1. <3> The betaine (B) is 1 betaine, wherein R is an alkyl or alkenyl group having 12 or less carbon atoms; 1betaine, wherein <2> The liquid cleaning composition according to claim 1. <4> The value of the following conditional formula 1 is 0.3 to 4.0. <3> The liquid cleaning composition according to claim 1. Conditional formula 1: The above R 1 The total weight of betaines having an alkyl or alkenyl group with a carbon number of 12 or less / the above R 1 The total weight of betaines having an alkyl or alkenyl group with 14 or more carbon atoms <5> The composition further contains a nonionic surfactant (C), and the proportion of the nonionic surfactant (C) in the composition is 1.5 to 10% by weight. <1> or <2> The liquid cleaning composition according to claim 1. Effect of the Invention

[0009] The liquid detergent composition of the present invention does not become cloudy even at room temperature or at a low temperature of -5°C, and has excellent viscosity and foaming properties. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, each component of the liquid detergent composition (hereinafter, sometimes simply referred to as the detergent composition) will be described.

[0011] [Amino acid-based anionic surfactant (A)] The cleaning composition of the present invention contains an amino acid-based anionic surfactant (A). The amino acid-based anionic surfactant (A) is not particularly limited as long as it is one that is normally used in detergent compositions, and examples thereof include N-acylamino acid salts such as sodium N-lauroyl-L-glutamate, ammonium N-lauroyl-L-glutamate, sodium N-lauroyl sarcosine, sodium N-coconut oil fatty acid sarcosine, potassium N-coconut oil fatty acid acyl glycine, N-lauroyl-N-methylalanine triethanolamine, and N-coconut oil fatty acid acyl-L-glutamate triethanolamine; N-acyl alkyl taurine salts such as sodium N-coconut oil fatty acid acyl methyl taurine, sodium N-lauroyl methyl taurine, and potassium N-coconut oil fatty acid acyl methyl taurine; and N-acyl polypeptide salts such as potassium coconut oil fatty acid hydrolyzed collagen and sodium lauroyl hydrolyzed silk. These amino acid-based anionic surfactants may be used alone or in combination of two or more.

[0012] [Betaine (B)] The betaine (B) contained in the cleaning composition of the present invention is represented by the above general formula (1). In general formula (1), R 1 is an alkyl or alkenyl group. From the viewpoint of not becoming cloudy even at room temperature or at a low temperature of -5°C, and of having good viscosity and foaming properties, R 1 is preferably an alkyl or alkenyl group having 8 to 22 carbon atoms. R of the betaine (B) 1 contains at least two types of alkyl or alkenyl groups from the viewpoints of not becoming cloudy even at room temperature or at a low temperature of -5°C and of having good viscosity and foamability. R of the betaine (B) 1 From the viewpoints of not becoming cloudy even at room temperature or a low temperature of -5°C and of having good viscosity and foamability, it is preferable for the composition to contain an alkyl or alkenyl group having 12 or less carbon atoms and an alkyl or alkenyl group having 14 or more carbon atoms. From the viewpoints of not becoming cloudy even at room temperature or a low temperature of -5°C and of having good viscosity and foamability, the value of the following conditional formula 1 is preferably 8 / 2 to 3 / 7 (0.3 to 4.0), and more preferably 0.4 to 3.0. Conditional formula 1: The above R1 The total weight of betaines having an alkyl or alkenyl group with a carbon number of 12 or less / the above R 1 The total weight of betaines having an alkyl or alkenyl group with 14 or more carbon atoms

[0013] [Nonionic surfactant (C)] The nonionic surfactant (C) is not particularly limited, and examples thereof include sorbitan fatty acid esters such as sorbitan caprate and sorbitan dioleate; glycerin fatty acid esters such as glyceryl monolaurate and glyceryl distearate; polyoxyalkylene fatty acid esters such as polyoxyethylene (4.5) isostearate, polyoxyethylene (9) distearate, and butylene glycol laurate; polyoxyalkylene alkylphenyl ethers such as polyoxyethylene (7) octylphenyl ether and polyoxyethylene (10) nonylphenyl ether; polyoxyalkylene styrenated phenyl ethers such as polyoxyethylene (18) distyrenated phenyl ether and polyoxyethylene (24) tristyrenated phenyl ether. ether; polyoxyalkylene sorbitan fatty acid esters such as polyoxyethylene (20) sorbitan laurate and polyoxyethylene (20) sorbitan oleate; polyglycerin fatty acid esters such as tetraglycerin monolaurate and decaglycerin monolaurate; alkyl glycosides such as 2-ethylhexyl glycoside, octyl glycoside, decyl glycoside, dodecyl glycoside, and tetradecyl glycoside; fatty acid alkanolamides such as coconut oil fatty acid monoethanolamide, lauric acid isopropanolamide, coconut oil fatty acid N-methylethanolamide, and polyoxyethylene (5) coconut oil fatty acid monoethanolamide; polyoxyalkylene (hydrogenated) castor oil ether such as polyoxyethylene (40) hydrogenated castor oil ether. In the above, polyoxyethylene (7) means a polyoxyethylene group having 7 repeating units of the oxyethylene group. These nonionic surfactants may be used alone or in combination of two or more.

[0014] [Water (W)] Examples of water (W) include purified water, ion-exchanged water, distilled water, RO water, tap water, industrial water, etc. Among these, purified water and other water are particularly preferred.

[0015] [Liquid detergent composition] The content of the amino acid anionic surfactant (A) in the cleaning composition of the present invention is 5 to 20% by weight. If it is less than 5% by weight, the foaming property is insufficient. If it exceeds 20% by weight, the viscosity is insufficient. From the viewpoint of exerting the effects of the present invention, the content is preferably 6 to 17% by weight, and more preferably 7 to 15% by weight.

[0016] The content of betaine (B) in the cleaning composition of the present invention is 2 to 20% by weight. If it is less than 2% by weight, the viscosity is insufficient, and if it exceeds 20% by weight, the transparency is insufficient.

[0017] The cleaning composition of the present invention may contain, in addition to the above components (A) to (C) and (W), an anionic surfactant (D) other than (A). The anionic surfactant (D) is not particularly limited, but from the viewpoint of cleaning properties, it is preferable to include at least one selected from sulfate ester anionic surfactants (D1), carboxylate anionic surfactants (D2), sulfonic acid anionic surfactants (D3), and phosphate ester anionic surfactants (D4), more preferably to include at least one selected from sulfate ester anionic surfactants (D1) and carboxylate anionic surfactants (D2), and even more preferably to include sulfate ester anionic surfactant (D1). The anionic surfactant (D) may be used alone or in combination of two or more. From the viewpoint of cleaning properties, the anionic surfactant (D) preferably has an alkyl or alkenyl group having 8 to 18 carbon atoms, more preferably has an alkyl or alkenyl group having 10 to 18 carbon atoms, and particularly preferably has an alkyl or alkenyl group having 12 to 18 carbon atoms.

[0018] Examples of the sulfate ester type anionic surfactant (D1) include alkyl sulfate ester salts such as sodium dodecyl sulfate, potassium dodecyl sulfate, triethanolamine dodecyl sulfate, sodium stearyl sulfate, and sodium oleyl sulfate; polyoxyethylene alkyl ether sulfate ester salts such as polyoxyethylene (3) sodium dodecyl sulfate, polyoxyethylene (3) sodium cetyl sulfate, and polyoxyethylene (3) cetyl sulfate triethanolamine; sulfated oils such as turpentine oil; and sulfated fatty acid ester salts such as sulfated butyl oleate. In the above, polyoxyethylene (3) means a polyoxyethylene group having 3 repeating units of the oxyethylene group. As the sulfate ester type anionic surfactant (D1), alkyl sulfate ester salts, polyoxyethylene alkyl ether sulfate ester salts, sulfated fatty acid ester salts, and the like are preferred, and alkyl sulfate ester salts, polyoxyethylene alkyl ether sulfate ester salts, and the like are more preferred. These sulfate ester type anionic surfactants (D1) may be used alone or in combination of two or more.

[0019] Examples of the carboxylate anionic surfactant (D2) include fatty acid salts and alkyl ether carboxylates, and examples of these salts include alkali metal salts such as sodium and potassium, and alkanolamine salts such as monoethanolamine, diethanolamine, and triethanolamine. Examples of the fatty acid include octyl acid, caprylic acid, lauric acid, myristic acid, palmitic acid, stearyl acid, oleic acid, tridecyl acid, and isotridecyl acid. Examples of the alkyl ether carboxylic acid include polyoxyethylene (3) dodecyl ether carboxylic acid, polyoxyethylene (6) dodecyl ether carboxylic acid, and polyoxyethylene (3) tridecyl ether carboxylic acid. Examples of the carboxylate anionic surfactant (D2) include sodium caprylate, potassium caprylate, sodium laurate, potassium laurate, sodium myristic acid, potassium myristic acid, sodium palmitate, and potassium palmitate. These carboxylate anionic surfactants (D2) may be used alone or in combination of two or more.

[0020] Examples of the sulfonic acid type anionic surfactant (D3) include alkylbenzenesulfonates such as linear sodium dodecylbenzenesulfonate and branched sodium dodecylbenzenesulfonate; α-olefinsulfonates such as sodium α-tetradecenesulfonate, sodium α-hexadecenesulfonate and potassium α-hexadecenesulfonate; alkanesulfonates such as sodium dodecylsulfonate and sodium tetradecylsulfonate; α-sulfofatty acid ester salts such as sodium α-methylsulfolaurate and sodium methoxyhexaethyleneglycol-α-methylsulfolaurate; acylisethionates such as sodium cocoylisethionate and ammonium cocoylisethionate; dialkylsulfosuccinates such as sodium dioctylsulfosuccinate; and alkylnaphthalenesulfonates such as sodium propylnaphthalenesulfonate. As the sulfonic acid type anionic surfactant (D3), alkylbenzenesulfonate, α-olefinsulfonate, alkane sulfonate, and dialkylsulfosuccinate are preferred, and alkylbenzenesulfonate and alkane sulfonate are more preferred. These sulfonic acid type anionic surfactants (D3) may be used alone or in combination of two or more.

[0021] Examples of the phosphate ester type anionic surfactant (D4) include alkyl phosphates such as sodium dodecyl phosphate, potassium dodecyl phosphate, sodium stearyl phosphate, and potassium stearyl phosphate; polyoxyethylene alkyl ether phosphates such as sodium polyoxyethylene (3) lauryl ether phosphate and potassium polyoxyethylene (3) lauryl ether phosphate; and polyoxyethylene alkyl phenyl ether phosphates such as sodium polyoxyethylene (3) lauryl phenyl ether phosphate and potassium polyoxyethylene (3) lauryl phenyl ether phosphate. Examples of the phosphate ester type anionic surfactant (D4) include alkyl phosphate esters and polyoxyethylene alkyl ether phosphate esters, and more preferably alkyl phosphate esters. These phosphate ester type anionic surfactants (D4) may be used alone or in combination of two or more.

[0022] When the cleaning composition of the present invention contains an anionic surfactant (D), the proportion of the anionic surfactant (D) in the cleaning composition of the present invention is preferably from 0.2 to 5 wt %, more preferably from 0.3 to 4 wt %, and even more preferably from 0.4 to 3 wt %, from the viewpoint of cleaning performance.

[0023] The cleaning composition of the present invention may contain a water-soluble inorganic salt. Examples of the water-soluble inorganic salt include inorganic salts of a single composition such as sodium chloride, potassium chloride, magnesium chloride, calcium chloride, magnesium sulfate, calcium sulfate, and sodium sulfate, and salts containing mixed inorganic substances such as rock salt, sea salt, and natural salt. As the water-soluble inorganic salt, sodium chloride, potassium chloride, magnesium chloride, calcium chloride, and magnesium sulfate are preferred, and sodium chloride is more preferred. These water-soluble inorganic salts may be used alone or in combination of two or more. The blending amount of the water-soluble inorganic salt is preferably 0.1 to 8% by weight, and more preferably 0.2 to 5% by weight, based on the detergent composition. Within this blending amount range, it is possible to impart appropriate viscosity to the detergent composition of the present invention without impairing storage stability.

[0024] The detergent composition of the present invention may contain a higher fatty acid. The higher fatty acid refers to a fatty acid having a carbon chain of 12 to 40. Examples of higher fatty acids include straight-chain fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, and behenic acid, branched fatty acids such as isostearic acid, unsaturated fatty acids such as oleic acid, and mixed fatty acids such as coconut oil fatty acid, palm kernel oil fatty acid, and beef tallow fatty acid. Straight-chain fatty acids are preferred, and myristic acid is more preferred. These higher fatty acids may be used alone or in combination of two or more. The amount of higher fatty acid to be added is preferably 0.1 to 3% by weight, more preferably 0.1 to 1%, based on the detergent composition. If the amount is small, foaming will be poor, and if it is added excessively, storage stability will be deteriorated. In addition, since it is possible to maintain a viscosity suitable for use by adding the higher fatty acid in the above amount, it is not important to add more or less higher fatty acid.

[0025] [Other ingredients] The liquid detergent composition of the present invention may contain other components other than the above components, as long as the effects of the present invention are not impaired. Examples of other components include pH adjusters such as sulfuric acid, hydrochloric acid, acetic acid, lactic acid, citric acid, sodium hydroxide, potassium hydroxide, alkanolamines, and sodium carbonate; preservatives such as methylparaben, ethylparaben, benzoates, and phenoxyethanol; water-soluble organic solvents such as methanol, ethanol, isopropanol, ethylene glycol, and propylene glycol; chelating agents; texture improvers such as cationized hydroxyalkylcellulose and silicones such as dimethylpolysiloxane; viscosity adjusters such as carboxyalkylcellulose and amidopropylbetaine; fragrances; and colorants.

[0026] The cleansing composition of the present invention does not become cloudy even at room temperature or at a low temperature of -5°C, and has excellent viscosity and foaming properties, so that it can be used as a face wash, body soap, hand soap, shampoo, etc. EXAMPLES

[0027] Examples of the present invention will be specifically described below together with comparative examples. Note that the present invention is not limited to these examples. In the following examples and comparative examples, unless otherwise specified, "parts" means "parts by weight" and "%" means "% by weight". In the following Examples and Comparative Examples, the weight ratio of alkyl or alkenyl groups in the betaine (B) of the liquid detergent composition, foaming ability, viscosity, and low-temperature storage stability were evaluated by the methods described below.

[0028] [Weight ratio of alkyl or alkenyl groups in betaine (B)] R of betaine (B) in liquid detergent composition 1 The ratio of the total weight of betaines having alkyl or alkenyl groups with 12 or less carbon atoms to the total weight of betaines having alkyl or alkenyl groups with 14 or more carbon atoms was 0.3 to 4.0, and all other cases were judged as "×".

[0029] [Foaming test (Ross Miles test)] The liquid detergent composition was diluted with purified water to a non-volatile content of 0.02% by weight to prepare a liquid detergent composition. According to the method described in JIS-K3362, 200 mL of the diluted solution prepared above was dropped onto the liquid surface from a height of 900 mm at 25°C for 30 seconds using a Ross Miles foaming tester, and the height of the foam generated when the drop was completed was measured immediately after the drop was completed. If the height of the foam was 100 mm or more immediately after the drop was completed, the foaming property was judged to be good and marked with "○", and if it was less than that, the foaming property was judged to be poor and marked with "×".

[0030] [Measurement of Viscosity] The liquid detergent compositions were left to stand in a thermostatic chamber at 25°C for 24 hours, and then their viscosities were measured using a viscometer (Model TVB-10, manufactured by Toki Sangyo Co., Ltd.). Viscosities of 300 mPa·s or more were judged to be good and marked with an "O" mark, whereas those with a viscosity below this were judged to be poor and marked with an "X" mark.

[0031] [Low temperature storage stability] After preparation of the liquid detergent composition, it was left to stand at -5°C for 5 days and its appearance was observed with the naked eye. A transparent liquid that was fluid and showed no change in appearance was judged to have good low-temperature stability and was rated as "○", whereas a liquid that showed turbidity, separation, precipitation or solidification was judged to have poor low-temperature stability and was rated as "×".

[0032] The components used in the examples and comparative examples are shown below. a-1: Potassium cocoyl glycine (Amirite GCK-12K, manufactured by Ajinomoto Co., Inc.) a-2: Triethanolamine cocoyl glutamate (Amisoft CT-12S, manufactured by Ajinomoto Co., Inc.) a-3: Potassium cocoyl glutamate (Amisoft CK-22, manufactured by Ajinomoto Co., Inc.) a-4: Sodium cocoyl glutamate (Amisoft CS-22, manufactured by Ajinomoto Co., Inc.) b-1: Lauryl dimethylaminoacetate betaine (Marpovistar MLS, Matsumoto Yushi Pharmaceutical Co., Ltd.) b-2: Myristyl dimethylaminoacetate betaine (Marpovistar MMS, Matsumoto Yushi Pharmaceutical Co., Ltd.) b-3: Stearyl dimethylaminoacetate betaine (Marpovistar MS, Matsumoto Yushi Pharmaceutical Co., Ltd.) c-1: Coconut oil fatty acid diethanolamide (Marpon MM, Matsumoto Yushi Pharmaceutical Co., Ltd.) c-2: Fatty acid (C8-18) methylethanolamide (Aminone C-11S, Kao Corporation) c-3: Butylene glycol laurate (Compol BL, manufactured by Nippon Oil & Fats Co., Ltd.) d-1: Polyoxyethylene (3) lauryl ether sodium sulfate (EMAL 20C, manufactured by Kao Corporation) d-2: Coconut oil fatty acid K soap (Lavanol CK, manufactured by Matsumoto Yushi Seiyaku Co., Ltd.) w-1: Purified water

[0033] Example 1 In a mixing tank, 9 wt% a-1 potassium cocoyl glycine, 3 wt% b-1 lauryl dimethylaminoacetic acid betaine, 6 wt% b-2 myristyl dimethylaminoacetic acid betaine, 4 wt% c-2 fatty acid (C8-18) methylethanolamide, and the remainder w-1 purified water were mixed and stirred thoroughly to obtain the liquid detergent composition of Example 1. The obtained cleaning composition was subjected to tests for foaming property, viscosity increasing property and low temperature stability. The evaluation results are shown in Table 1.

[0034] [Examples 2 to 13 and Comparative Examples 1 to 15] In Examples 2 to 13 and Comparative Examples 1 to 15, detergent compositions were obtained in the same manner as in Example 1, except that the ingredients were changed as shown in Tables 1 to 4. The evaluation results are also shown in Tables 1 to 4. The numerical values ​​of each component in Tables 1 to 4 represent the mass % content of each component based on the non-volatile content of the component contained in the liquid detergent composition.

[0035] [Table 1]

[0036] [Table 2]

[0037] [Table 3]

[0038] [Table 4]

[0039] [Examples 14 and 15] A detergent composition was obtained in the same manner as in Example 1, except that a-5: sodium cocoyl alanine (Amyrite ACS-12, manufactured by Ajinomoto Co., Inc.) was used in addition to the amino acid-based anionic surfactant (A) in Example 1, as shown in Table 5. The evaluation results are also shown in Table 5. The numerical values ​​of each component in Table 5 represent the mass % content of each component based on the non-volatile content of the component contained in the liquid detergent composition.

[0040] [Table 5]

[0041] As shown in Tables 1, 2 and 5, the liquid detergent compositions of Examples 1 to 15 are liquid detergent compositions containing an amino acid-based anionic surfactant (A), a betaine (B) represented by the above general formula (1), and water (W), in which the proportion of the activator (A) in the composition is 5 to 20% by weight, and the proportion of the betaine (B) in the composition is 2 to 20% by weight. Therefore, the liquid detergent compositions of the present application do not become cloudy even at room temperature or a low temperature of -5°C, and have excellent viscosity and foaming properties. On the other hand, as shown in Tables 3 and 4, the R 1 When the amount of activator (A) is not two (Comparative Examples 1 to 4, 6, 7, 9, 10, and 14), when betaine (B) is not contained (Comparative Examples 5, 8, and 11), when the amount of activator (A) is not within the range of 5 to 20% by weight (Comparative Examples 13, 14, and 15), and when the amount of betaine (B) is not within the range of 2 to 20% by weight (Comparative Example 12), any one of the problems cannot be solved.

Claims

1. A liquid detergent composition comprising an amino acid-based anionic surfactant (A), a betaine (B) represented by the following general formula (1), and water (W), The ratio of the activator (A) in the composition is 5 to 20% by weight, the ratio of the betaine (B) is 2 to 20% by weight, and R of the betaine (B) is １ A liquid detergent composition having at least two alkyl or alkenyl groups. 【Chemistry 1】 (In formula (1), R １ is an alkyl group or an alkenyl group.

2. The R １ The liquid detergent composition according to claim 1, wherein is an alkyl or alkenyl group having 8 to 22 carbon atoms.

3. The betaine (B) is １ betaine, wherein R is an alkyl or alkenyl group having 12 or less carbon atoms; １ The liquid detergent composition according to claim 2 , further comprising a betaine, wherein

4. The liquid detergent composition according to claim 3, wherein the value of the following conditional formula 1 is 0.3 to 4.

0. Conditional formula 1: The R １ The total weight of betaines having an alkyl or alkenyl group having 12 or less carbon atoms / the R １ The total weight of betaines having an alkyl or alkenyl group having 14 or more carbon atoms

5. 3. The liquid detergent composition according to claim 1, further comprising a nonionic surfactant (C), the proportion of the nonionic surfactant (C) in the composition being 1.5 to 10% by weight.

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