JP2016199475A - Liquid detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide liquid detergent compositions for foamer containers which can produce foam having foamability, irritation relief to the skin, moisture retention, low temperature stability, dischargeability from a foamer container, and excellent high elasticity.SOLUTION: A liquid detergent composition contains (A) as a surfactant, (a1) 0.5-6 mass% of a fatty acid salt having 6 to 22 carbon atoms, and (a2) 0.1-2 mass% of an acyl alkyl taurine salt type anionic surfactant, (a3) 1-5 mass% of a betaine type ampholytic surfactant; (B) 1-10 mass% of a polyhydric alcohol; (C) 0.01-0.2 mass% of a glycyrrhizinic acid salt; and (D) 0.1-0.8 mass% of a water-soluble polymer. The water-soluble polymer (D) can increase the elasticity of foam.SELECTED DRAWING: None

Description

  The present invention relates to a liquid detergent composition for a former container.

  The liquid detergent composition used by filling the former container can be used as fine bubbles in a foamed state by mixing with air by discharging it through the porous film in the former container. It is used in skin cleansing agents such as facial cleansers and hand soaps.

  Various liquid detergent compositions for such former containers have been conventionally proposed. For example, Patent Document 1 contains a fatty acid salt, an amphoteric surfactant, and an N-acyl-N-methylamino acid salt as a surfactant, and the fatty acid salt has 12 carbon atoms (the carbon number of the hydrocarbon group is 11) The following fatty acid salt and fatty acid salt having 14 or more carbon atoms (carbon number of hydrocarbon group is 13) or more (fatty acid salt having 12 or less carbon atoms) / (fatty acid salt having 14 or more carbon atoms) = 1.4 to A liquid skin cleanser that is used in combination at a mass ratio of 2.8 has been proposed. And the liquid skin cleansing material of this cited document 1 has foamy creaminess, low-temperature storage stability, inhibitory precipitation during low-temperature storage, discharge from a foam container, inhibitory amount of transdermal transpiration, mildness to the skin. It has the property of being excellent in properties.

Japanese Patent No. 4868148

  The liquid detergent composition used by filling the former container is required to have the above-mentioned characteristics, but the foam elasticity is also an important characteristic. In other words, if the fine bubbles are tightly packed, the elasticity of the bubbles becomes stronger, and the cushioning property of the highly elastic foam reduces the friction when rubbing the skin during washing, and stimulates sensitive skin by friction Can be relieved. However, the liquid skin cleansing material of Patent Document 1 described above cannot be said to have a sufficient effect of obtaining such highly elastic foam.

  The present invention has been made in view of the above points, and has foaming performance, ease of irritation to the skin, moisture retention, low temperature stability, dischargeability from a foam container, etc., and a highly elastic foam. It is an object of the present invention to provide a liquid detergent composition for a former container that can be obtained.

  The liquid detergent composition according to the present invention is a liquid detergent composition used by filling a former container, and (A) a surfactant having (a1) a fatty acid salt having 6 to 22 carbon atoms in an amount of 0. 5-6% by mass, (a2) 0.1-2% by mass of acylalkyltaurine salt type anionic surfactant, (a3) 1-5% by mass of betaine-type amphoteric surfactant, (B) polyhydric alcohol 1 to 10% by mass, (C) 0.01 to 0.2% by mass of glycyrrhizinate, and (D) 0.1 to 0.8% by mass of a water-soluble polymer. is there.

  According to the present invention, (A) (a1) fatty acid salt, (a2) acylalkyltaurine salt type anionic surfactant, (a3) betaine type amphoteric surfactant as described above are used as the surfactant. By using a combination of blending amounts, it is possible to obtain a liquid detergent composition having good dischargeability from the former container while improving foaming performance and irritation mitigation to the skin. Moisturizing and low-temperature stability can be improved by blending, (C) glycyrrhizinate can be used to provide an anti-inflammatory effect, and (D) foam elasticity can be increased by blending water-soluble polymers. It is something that can be done.

  In addition, the present invention is characterized in that a water-soluble cellulose derivative is used as the water-soluble polymer (D).

  Among the water-soluble polymers, the water-soluble cellulose derivative has a high solubility in water at a low temperature and can provide a liquid detergent composition having excellent low-temperature stability.

  In the present invention, a water-soluble cellulose derivative selected from hydroxypropylmethylcellulose and hydroxypropylcellulose is used as the water-soluble polymer.

  Among water-soluble cellulose derivatives, hydroxypropylmethylcellulose and hydroxypropylcellulose are particularly excellent in the effect of increasing the elasticity of foam.

  In the present invention, (a1) fatty acid salts are those having 12 or less carbon atoms and those having 14 or more carbon atoms (fatty acid salt having 12 or less carbon atoms) / (fatty acid salt having 14 or more carbon atoms) = 3.0. It uses together by the mass ratio of -5.5, It is characterized by the above-mentioned.

  (A1) As fatty acid salts, those having 12 or less carbon atoms and those having 14 or more carbon atoms are used together in the above ratio, thereby suppressing the foam quality from becoming rough or causing a feeling of tightness to the skin. A liquid detergent composition having high foaming performance can be obtained.

  According to the present invention, (A) (a1) fatty acid salt, (a2) acylalkyltaurine salt type anionic surfactant, and (a3) betaine type amphoteric surfactant are combined in a specific blending amount as a surfactant. By using the liquid detergent composition, it is possible to obtain a liquid detergent composition having good dischargeability from the former container while improving the foaming performance and the irritation relaxation property for the skin. In addition, it is possible to improve moisture retention and low-temperature stability by blending polyhydric alcohols, to obtain an anti-inflammatory effect by blending (C) glycyrrhizinate, and (D) foaming by blending water-soluble polymers. The elasticity can be increased.

  Embodiments of the present invention will be described below.

The liquid detergent composition according to the present invention is prepared by including each component of (A) a surfactant, (B) a polyhydric alcohol, (C) glycyrrhizinate, and (D) a water-soluble polymer. And
It is used by filling a former container.

  In the liquid detergent composition of the present invention, the component (A) surfactant is (a1) a fatty acid salt, (a2) an acylalkyltaurine salt type anionic surfactant, (a3) a betaine type amphoteric surfactant. A combination of three components is used. In addition, it is also possible to add surfactant other than these three components as needed.

  In the surfactant (A), the (a1) fatty acid salt is a fatty acid salt having 6 to 22 carbon atoms. Here, the carbon number of the fatty acid salt means the number of carbon atoms in the molecular formula of the fatty acid salt, and the fatty acid salt is RCOOM (where R is a monovalent hydrocarbon group, M is an alkali metal, a substituted or unsubstituted amino group). Or ammonium), the monovalent hydrocarbon group R has 5 to 21 carbon atoms.

  Examples of (a1) fatty acid salts that can be used in the present invention include, for example, alkali metals selected from sodium and potassium of caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, and oleic acid. Salt and triethanolamine salt. These can be used alone or in combination of two or more.

  Here, caprylate, caprate and laurate are fatty acid salts having 12 or less carbon atoms, and myristate, palmitate, stearate and oleate are fatty acid salts having 14 or more carbon atoms. However, as (a1) fatty acid salt, a fatty acid salt having 12 or less carbon atoms and a fatty acid salt having 14 or more are (fatty acid salt having 12 or less carbon atoms) / (fatty acid salt having 14 or more carbon atoms) = 3.0 to It is preferable to use together at a mass ratio of 5.5. When there are many fatty acid salts with 14 or more carbon atoms and this mass ratio is less than 3.0, foaming performance is inferior, and conversely, there are many fatty acid salts with 12 or less carbon atoms, and this mass ratio exceeds 5.5. In some cases, the foam becomes rough and the skin feels tight. For this reason, by using together a fatty acid salt having 12 or less carbon atoms and a fatty acid salt having 14 or more carbon atoms at a mass ratio in the range of 3.0 to 5.5, the foam quality becomes rough and a feeling of firmness to the skin appears. It is possible to obtain a liquid detergent composition having good foaming performance while suppressing the occurrence of stagnation.

  In the liquid detergent composition, the content of (a1) fatty acid salt is set in the range of 0.5 to 6% by mass. In order to enhance the foaming performance, (a1) fatty acid salt is used, and if the content of (a1) fatty acid salt is less than 0.5% by mass, the foaming performance of the liquid detergent composition becomes insufficient, On the other hand, if it exceeds 6% by mass, the viscosity of the liquid detergent composition at a low temperature is increased and the dischargeability from the former container is deteriorated. For this reason, by setting the content of the (a1) fatty acid salt in the range of 0.5 to 6% by mass, the foaming performance can be improved while maintaining good dischargeability from the former container. .

  In the component (A) surfactant, examples of the (a2) acylalkyl taurine salt type anionic surfactant include N-lauroylmethyl taurine sodium, N-coconut fatty acid methyl taurine potassium, and N-coconut fatty acid methyl taurine. Examples thereof include sodium and N-coconut fatty acid methyl taurine magnesium. These may be used alone or in combination of two or more.

  In the liquid detergent composition, the content of (a2) acylalkyl taurine salt type anionic surfactant is set in the range of 0.1 to 2% by mass. In order to reduce irritation caused by the liquid detergent composition, (a2) an acylalkyl taurine salt type anionic surfactant is used, and (a2) the content of the acylalkyl taurine salt type anionic surfactant is 0.00. When the amount is less than 1% by mass, the stimulus mitigating effect becomes insufficient. Conversely, when the amount exceeds 2% by mass, the foam quality of the liquid detergent composition becomes rough. For this reason, by setting the content of the (a2) acylalkyl taurine salt type anionic surfactant in the range of 0.1 to 2% by mass, the irritation is low while suppressing the foam from becoming coarse. A liquid detergent composition can be obtained.

  In the surfactant of component (A), (a3) betaine-type amphoteric surfactants include, for example, amidopropyl betaine-type amphoteric surfactants, aminoacetic acid betaine-type amphoteric surfactants, and imidazolinium-type amphoteric surfactants. Agents, sulfobetaine type amphoteric surfactants, and the like. These may be used alone or in combination of two or more.

  Examples of the amidopropyl betaine amphoteric surfactant include coconut fatty acid amidopropyl betaine, palm oil fatty acid amidopropyl betaine, lauric acid amidopropyl betaine, and myristic amidopropyl betaine. Examples of aminoacetic acid betaine type amphoteric surfactants include lauryl dimethylaminoacetic acid betaine, coconut oil alkyldimethylaminoacetic acid betaine, stearyldimethylaminoacetic acid betaine, stearyl dihydroxyethyl betaine, 2-alkyl-N-carboxymethyl-N-hydroxy. Examples include ethyl imidazolinium betaine and sodium laurylaminodipropionate. Examples of the imidazolinium-type amphoteric surfactant include 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine and undecyl hydroxyethyl imidazolinium betaine sodium. Examples of the sulfobetaine-type amphoteric surfactant include lauric acid amidopropyl hydroxysulfobetaine, lauryl hydroxysulfobetaine, coconut oil fatty acid hydroxysulfobetaine, myristic acid amidopropyl hydroxysulfobetaine, oleamidopropyl hydroxysulfobetaine, lauryl sulfobetaine. , Cocosulfobetaine, lauramidopropylbetaine, and the like. These can be used alone or in combination of two or more.

  In the liquid detergent composition, the content of (a3) betaine-type amphoteric surfactant is set in the range of 1 to 5% by mass. (A3) Betaine-type amphoteric surfactants are used to enhance foaming performance and relieve irritation. (A3) When the content of betaine-type amphoteric surfactant is less than 1% by mass, foaming occurs. On the contrary, if it exceeds 5% by mass, it gives an unpleasant feeling of nullness after washing, the washability is poor, and the viscosity of the liquid detergent composition increases at low temperatures. Dischargeability from the container may deteriorate. For this reason, by setting the content of the (a3) betaine-type amphoteric surfactant in the range of 1 to 5% by mass, the feeling of nulliness after washing is reduced, and the washability and dischargeability from the former container are reduced. It is possible to obtain a liquid detergent composition having high foaming performance and low irritation while maintaining good.

  Next, in the liquid detergent composition of the present invention, examples of the polyhydric alcohol (B) include ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, isoprene glycol, 1,3. -Dihydric alcohols such as butylene glycol, and trihydric or higher alcohols such as glycerin, diglycerin, triglycerin, etc., and erythritol, pentaerythritol, dipentaerythritol, glucose, mannose, galactose, sucrose, fructose , Sugars such as maltose, maltitol, xylitol, sorbitol or sugar alcohols. These may be used singly or in combination of two or more. Among these, glycerin, diglycerin, 1,3-butylene glycol, propylene glycol, dipropylene glycol, sorbitol and the like are more preferable.

  In the liquid detergent composition, the content of (B) polyhydric alcohol is set in the range of 1 to 10% by mass. (B) Polyhydric alcohol is used to suppress precipitation of fatty acid salts at moisturizing and low temperature, and (B) after washing, if the content of polyhydric alcohol is less than 1% by mass The moisturizing feeling is inferior, and the effect of suppressing precipitation of fatty acids at low temperatures is reduced. Conversely, when it exceeds 10 mass%, foaming performance will fall. For this reason, by setting the content of the (B) polyhydric alcohol in the range of 1 to 10% by mass, a liquid having a high effect of keeping the foaming performance good and suppressing the retention of fatty acid salts at low temperatures. A cleaning composition can be obtained.

  Next, in the liquid detergent composition of the present invention, examples of the (C) component glycyrrhizinate include dipotassium glycyrrhizinate, monoammonium glycyrrhizinate, and trisodium glycyrrhizinate. These may be used alone or in combination with a plurality of types, but it is preferable to use dipotassium glycyrrhizinate from the viewpoint of solubility in water.

  In the liquid detergent composition, the content of (C) glycyrrhizinate is set in the range of 0.01 to 0.2% by mass. (C) Glycyrrhizinate is used for anti-inflammation to prevent inflammation on the skin when using the liquid detergent composition, and the content of (C) glycyrrhizinate is 0.01 If it is less than mass%, the effect of extinguishing the flame is not sufficiently exhibited. Even if the content exceeds 0.2% by mass, the anti-inflammatory effect does not change much. When the content exceeds 0.2% by mass, the cost increases due to an increase in the amount of expensive glycyrrhizinate used. Become high.

  Next, in the liquid detergent composition of the present invention, water-soluble cellulose derivatives such as methylcellulose, hydroxypropylmethylcellulose, hydroxypropylethylcellulose, and hydroxypropylcellulose can be used as the water-soluble polymer of component (D). When a water-soluble polymer is blended in a liquid detergent composition, the water-soluble polymer may precipitate at a low temperature and become cloudy, which may clog the porous membrane of the former container. Because of the high solubility of water, precipitation at low temperatures does not occur.

  In the liquid detergent composition, the content of the water-soluble polymer (D) is set in the range of 0.1 to 0.8% by mass. (D) The water-soluble polymer is used to increase the elasticity of bubbles when the liquid detergent composition is discharged from the former container, and (D) the content of the water-soluble polymer is 0. If it is less than 1% by mass, highly elastic foam cannot be obtained. Conversely, if it exceeds 0.8% by mass, the viscosity of the liquid detergent composition becomes high and the dischargeability from the former container is poor. Become. For this reason, by setting the content of the water-soluble polymer (D) in the range of 0.1 to 0.8% by mass, the elasticity of the foam is improved while maintaining the dischargeability from the former container favorably. It is something that can be done.

  Here, as the water-soluble polymer (D), among the water-soluble cellulose derivatives, hydroxypropylmethylcellulose and hydroxypropylcellulose are preferable because they have a high effect of increasing the elasticity of the foam.

  A liquid detergent composition can be prepared by blending the above components (A) to (D) in water such as purified water and uniformly dissolving and dispersing them. In addition to the components A) to (D), optional components as required can be blended.

  The liquid detergent composition according to the present invention is used by filling a former container as described above, and is applied to a facial cleanser, body soap, hand soap, shampoo, etc. as a detergent for skin and hair. It is something that can be done. The former container is not particularly limited as long as it is of a non-gas (non-aerosol) type in which the liquid detergent composition is mixed with air by being discharged through a porous film formed of a mesh or the like. A well-known thing can be used without this.

  Next, the present invention will be specifically described with reference to examples. Needless to say, these examples are not restrictive. Further, unless otherwise specified, “%” in the composition indicates mass%, the ratio indicates a mass ratio, and the amount of each component in the table is an amount converted into a pure component.

(Examples 1-11, Comparative Examples 1-9)
(A) surfactant ((a1) fatty acid salt, (a2) acylalkyltaurine salt type anionic surfactant, (a3) betaine type amphoteric surfactant), (B) polyhydric alcohol, (C) glycyrrhizic acid A liquid detergent composition is prepared by using the salts shown in Tables 1 and 2 as the salt and (D) water-soluble polymer and mixing them uniformly with purified water in the blending amounts shown in Tables 1 and 2. did.

  The liquid cleaning composition thus obtained was evaluated as follows. The results are shown in Tables 1 and 2.

(Low temperature stability)
The liquid detergent composition was filled in a 200 mL polyester sample bottle and stored at a temperature condition of 5 ° C. for 1 week. And the liquid detergent composition preserve | saved for 1 week was observed visually, and the following reference | standard evaluated.
Evaluation criteria ◎: Appearance is transparent and no precipitate ○: Very slightly turbid but no precipitate △: Slightly cloudy, with some precipitate ×: Many precipitates

(Foaming power)
Take 1g of liquid detergent composition, prepare 1% aqueous solution, weigh 15g in Nessler tube, adjust to 40 ° C with water bath, set Nestler tube in tube stand, centering on lower end of Nessler tube It was rotated 90 degrees and shaken. And the height of the foam after shaking 120 times was made into foaming power. The results were averaged three times and evaluated according to the following criteria.
Evaluation criteria ◎: 61 cm or more ○: 51-60 cm
Δ: 41-50 cm
X: 40 cm or less

(Retention of keratin water content)
The horny water content was measured using a Corneometer (“Corneometer CM825” manufactured by Courage + Khazaka) by the capacitance method. First, after measuring the skin of the inner side of the upper arm before washing with the liquid detergent composition, the foam from which the liquid detergent composition was discharged once from the non-aerosol type pump former container was taken, and the inner part of the upper arm was taken as 1 It was washed for a minute, rinsed thoroughly with tap water, lightly wiped with a towel, dried for 20 minutes, and the skin on the inner side of the upper arm after this washing was measured again. This measurement was performed after acclimatization for 30 minutes in an environment of a temperature of 20 ° C. and a humidity of 40%.

The measurement of the amount of horny water is performed on 10 panelists (one male and one female in their 20s, one male and one in their 30s, one male and one in their 40s, one male and one in their 50s, one male and one female in their 60s). The average value of 10 persons was calculated | required and the keratin water retention was computed from the following formula.
Keratin moisture retention (%) = (Y−X) / X × 100
(X = Numerical water content before washing Y = Numerical water content after washing)

If the skin contains a lot of moisture, the capacitance increases, and a numerical value is displayed with a relative value of 0 to 120 according to the capacitance. If the decrease in the amount of keratin moisture after washing is small compared to the amount of keratin moisture before washing, that is, if the keratin moisture retention rate is high, the liquid detergent composition can be evaluated as mild to the skin. And evaluated according to the following criteria.
Evaluation criteria ◎: 91% or more ○: 71-90%
Δ: 51-70%
×: 50% or less

(Change in transdermal moisture transpiration)
The transdermal moisture transpiration was measured using a tevameter (“Tewameter”: manufactured by Courage + Khazaka). First, after measuring the skin of the inner side of the upper arm before washing with the liquid detergent composition, the foam from which the liquid detergent composition was discharged once from the non-aerosol type pump former container was taken, and the inner part of the upper arm was taken as 1 It was washed for a minute, rinsed thoroughly with tap water, lightly wiped with a towel, dried for 20 minutes, and the skin on the inner side of the upper arm after this washing was measured again. This measurement was performed after acclimatization for 30 minutes in an environment of a temperature of 20 ° C. and a humidity of 40%.

10 panelists (one for men and women in their 20s, one for men and women in their thirties, one for men and women in their forties, one for men and women in their 50s) Then, the rate of increase (%) after washing was calculated from the following equation when the measured value of transdermal moisture transpiration before washing was taken as 100.
Increase rate (%) = (Y−X) / X × 100
(X = Numerical value of transdermal moisture transpiration before washing Y = Numerical value of transdermal moisture transpiration after washing)

And the change of the transdermal moisture transpiration amount was evaluated from the average value of 10 panelists. The liquid detergent composition having a lower increase rate of transdermal moisture transpiration after washing than before washing can be said to be a mild detergent for the skin, and was evaluated according to the following criteria.
Evaluation criteria ◎: Increase rate is 0% or less ○: Increase rate is 1-20%
Δ: Increase rate is 21-40%
X: Increase rate is 41% or more

(Discharge from former container)
A non-aerosol type pump former container was filled with the liquid detergent composition and stored at 5 ° C. for 1 week. And the operation of the pump which discharges a liquid detergent composition from a former container on 5 degreeC temperature conditions was repeated 300 times, and it evaluated on the following reference | standard from the state of clogging of a pump and the discharge of foam.
Evaluation criteria A: There is no clogging of the pump, and foam can be easily discharged.
○: A slight force is required to discharge bubbles due to partial clogging, but there is no problem in quality.
(Triangle | delta): A strong force is required in order to discharge a bubble by partial clogging, and there exists a problem on quality.
X: Foam cannot be discharged due to clogging of the pump.

(Bubble elasticity)
Foam was discharged from a non-aerosol type pump former container filled with the liquid detergent composition, and the foam was filled with as little gap as possible to fill a 100 mL beaker. Then, a metal plate having a diameter of 2 cm and a mass of 1 g was gently placed on the foam, and the time until the metal plate sinks was measured. The longer the time it takes for the metal plate to sink, the more it can be said that the bubbles are more elastic.
Evaluation criteria ◎: 61 seconds or more until the metal plate sinks ○: 41 seconds to 60 seconds until the metal plate sinks Δ: 21 seconds to 40 seconds until the metal plate sinks ×: 20 seconds or less until the metal plate sinks

  As can be seen in Table 1, it is confirmed that the examples have good performance as liquid detergents for former containers. In Example 11, since the ratio of (a1) fatty acid salt having 12 or less carbon atoms to 14 or more carbon atoms was small, there were some problems with foaming power and the like. Further, as can be seen from the comparison between Examples 1, 2, 5-10 and Examples 3, 4, (D) Hydroxypropylmethylcellulose or hydroxy as a water-soluble polymer as in Examples 1, 2, 5-10. By using propylcellulose, it is confirmed that the effect of improving the elasticity of foam can be obtained highly.

  On the other hand, as seen in Table 2, since the content of (a1) fatty acid salt in Comparative Example 1 is more than 6% by mass, there is a problem in the dischargeability from the former container. In Comparative Example 3, (a1 ) Since no fatty acid salt was contained, there was a problem in foaming power. In Comparative Example 6, the content of the (a2) acylalkyl taurine salt type anionic surfactant was less than 0.1% by mass, and thus there was a problem in the change in transdermal moisture transpiration. In Comparative Example 8, the content of (a3) betaine-type amphoteric surfactant is as low as less than 1% by mass, so there is a problem in foaming power. In Comparative Example 9, content of (a3) betaine-type amphoteric surfactant Is more than 5% by mass, there is a problem in the dischargeability from the former container. Moreover, in the comparative example 2, since (B) polyhydric alcohol was not contained, there was a problem in foaming power. Furthermore, in Comparative Example 4, since (D) the water-soluble polymer was not contained, there was a problem in the elasticity of the foam.

Claims (4)

  A liquid detergent composition used by filling a former container, wherein (A) a surfactant is (a1) 0.5 to 6% by mass of a fatty acid salt having 6 to 22 carbon atoms, and (a2) an acylalkyl. 0.1-2% by mass of taurine salt type anionic surfactant, (a3) 1-5% by mass of betaine amphoteric surfactant, (B) 1-10% by mass of polyhydric alcohol, (C) glycyrrhizin A liquid detergent composition comprising 0.01 to 0.2% by mass of an acid salt and 0.1 to 0.8% by mass of a water-soluble polymer (D).   (D) The liquid detergent composition according to claim 1, wherein a water-soluble cellulose derivative is used as the water-soluble polymer.   The liquid detergent composition according to claim 2, wherein the water-soluble cellulose derivative is selected from hydroxypropylmethylcellulose and hydroxypropylcellulose.   (A1) As fatty acid salts, those having 12 or less carbon atoms and those having 14 or more carbon atoms (fatty acid salt having 12 or less carbon atoms) / (fatty acid salt having 14 or more carbon atoms) = 3.0 to 5.5 The liquid detergent composition according to any one of claims 1 to 3, wherein the liquid detergent composition is used in a mass ratio.