JP2016193979A - Liquid detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid detergent composition excellent in foam formation during cleaning, having long lasting of foam, capable of keeping wet and moisture on skin after drying and good in stability.SOLUTION: There is provided a liquid detergent composition containing a component (a): a polyoxyethylene alkyl ether type nonionic surfactant represented by the following formula (1) of 0.5 to 12 mass%, RO-(CHCHO)n-H (1) (where Rrepresents a linear or branched alkyl group or an alkenyl group having 10 to 14 carbon atoms and n represents the number of 85 to 150), a component (b): a linear or branched, saturated or unsaturated higher aliphatic acid salt having 8 to 18 carbon atoms of 5 to 30 mass%, a component (c): a water-soluble polymer of 0.05 to 2 mass%, and a component (d): water and having mass ratio of content of the component (b) to content of the component (a) [b/a] of 2 to 15.SELECTED DRAWING: None

Description

  The present invention relates to a liquid detergent composition used for body shampoos, facial cleansers, hair shampoos and the like.

  A body cleanser composition such as a body soap is generally used by foaming, and by washing with the foam, it plays a role of preventing friction caused by direct contact between skin and fingers. By preventing friction, it is possible to reduce unnecessary irritation to the skin and keep the skin moist after drying. Therefore, the thing which is excellent in foaming power, has good foam, and has good foam quality is required.

  In such a detergent composition, a water-soluble polymer is generally used for the purpose of improving the persistence of foam by thickening. The water-soluble polymer thickens the bulk and delays drainage, thereby improving foam persistence. If the persistence of the foam is improved, unnecessary friction to the skin does not occur, and moisture after drying can be maintained.

  However, when a large amount of the water-soluble polymer is added, stability and foaming properties are lowered. Since it is essential that the product has good stability, it has been difficult to improve the persistence of the foam. In addition, when a large amount of a surfactant such as a fatty acid salt is used in order to improve foaming properties, oil and fat necessary for the skin are also removed, resulting in a decrease in moisture after drying. Therefore, in the previous inventions, it has not been possible to provide a cleaning composition that sufficiently satisfies all of foaming properties, foam persistence, moisture after drying, and stability.

  Various studies have been conducted so far in order to improve the foam quality. A nonionic surfactant, an N-acylamino acid surfactant, an amphoteric surfactant or a semipolar surfactant, and a polyhydric alcohol, excellent in low temperature stability, and gives a moist skin feel after washing Although the patent document has proposed the agent composition, it was inadequate about the sustainability of the foam (patent document 1). Patent Document 2 contains a fatty acid salt, a nonionic surfactant, and a water-soluble polymer, has little irritation to the skin and a feeling of bulkiness after use, has excellent low-temperature stability, and is not easily spilled from the hand. Although a liquid skin cleanser with a high foaming amount and a sufficient amount of foam has been proposed even with a small amount of use, the persistence of the foam was still insufficient.

  In the prior art, it has not been possible to provide a detergent composition that sufficiently satisfies all of foamability, foam persistence, moisture after drying, and stability. There is a need for a liquid detergent composition that is excellent in foaming power at the time of washing, has foam persistence, can retain moisture moistened after drying, and has good storage stability.

JP 2006-183039 A JP 2007-169248 A

  The problem to be solved by the present invention is a liquid detergent composition that is excellent in foaming power at the time of washing, has foam persistence, can keep moisture moist after drying, and has good storage stability Is to provide things.

As a result of intensive studies to solve the above problems, the present inventors have found that a nonionic surfactant having an EO chain having a specific chain length, a higher fatty acid salt having a specific carbon number, a water-soluble polymer, And a liquid detergent composition containing water in a specific ratio has been completed.
That is, the present invention is the following [1].

[1] The following component (a), component (b), component (c) and component (d) are contained, the content of the component (a) is 0.5 to 12% by mass, The content of b) is 5-30% by mass, the content of component (c) is 0.05-2% by mass, and the content of component (b) relative to the content of component (a) The liquid detergent composition, wherein the mass ratio [b / a] is 2 to 15.
(A) the following formula (1);
R ¹ O— (CH ₂ CH ₂ O) n—H (1)
(Wherein R ¹ represents a linear or branched alkyl group or alkenyl group having 10 to 14 carbon atoms, and n represents a number of 85 to 150)
(B) a linear or branched, saturated or unsaturated higher fatty acid salt (c) water-soluble polymer (d) having 8 to 18 carbon atoms )water

  According to the present invention, there is provided a liquid detergent composition that has excellent foaming power at the time of washing, has foam persistence, can retain moisture moistened after drying, and has good storage stability. be able to.

Hereinafter, the present invention will be described in detail.
The present invention is a liquid detergent composition containing the following component (a), component (b), component (c) and component (d).

(Component (a))
The component (a) of the present invention is a polyoxyethylene alkyl ether type nonionic surfactant obtained by adding ethylene oxide to a long-chain alkyl or alkenyl alcohol (R ¹ OH), and an average addition mole number n of ethylene oxide is 85 to 85%. It is characterized by 150 mol. Specifically, it has a structure represented by the following formula.
R ¹ O— (CH ₂ CH ₂ O) n—H (1)
(Wherein R ¹ represents a linear or branched alkyl group or alkenyl group having 10 to 14 carbon atoms, and n represents a number of 85 to 150)

The long-chain alkyl or alkenyl alcohol (R ¹ OH) used as a starting material is not particularly limited, but is a saturated or unsaturated, linear or branched long chain having 10 to 14 carbon atoms. Alkyl or alkenyl alcohols can be used. Examples of such alcohols include decanol, lauryl alcohol, myristyl alcohol, and preferably lauryl alcohol and myristyl alcohol. These may be used alone or in appropriate combination of two or more. In addition, a long-chain alkyl or alkenyl alcohol obtained by reducing natural fats and oils such as coconut oil and palm kernel oil, the main components of which are lauryl alcohol and myristyl alcohol, can also be suitably used.

When the carbon number of R ¹ is less than 10, the foam persistence is insufficient. From this viewpoint, the carbon number of R ¹ is 10 or more, but 12 or more is preferable. On the other hand, if the carbon number of R ¹ exceeds 14, the sustainability of the bubbles is insufficient.

  The added mole number n of ethylene oxide is 85 to 150 mol, preferably 90 to 135 mol, more preferably 95 to 120 mol. If the number of moles of ethylene oxide added is too small, the sustainability of the foam will be insufficient, and if it is too large, the viscosity at the time of melting will be extremely high and handling will be poor. It becomes insufficient.

  Content of the component (a) in the liquid cleaning composition of this invention is 0.5-12 mass%, Preferably it is 1.0-9.0 mass%, More preferably, it is 2.0-6. 0% by mass. When the content of the component (a) is too small, the sustainability of the foam becomes insufficient. When the content is too large, the viscosity of the cleaning agent increases and the foaming property of the foam decreases.

(Component (b))
Component (b) of the present invention is a linear or branched saturated or unsaturated higher fatty acid salt having 8 to 18 carbon atoms. Examples of the fatty acid used in the fatty acid salt of the present invention include fatty acids having 8 to 18 carbon atoms such as capric acid, caprylic acid, lauric acid, myristic acid, palmitic acid, and stearic acid.

  When the number of carbon atoms of the fatty acid used in the fatty acid salt of the component (b) is less than 8, the foam persistence at the time of washing becomes insufficient. From this viewpoint, the fatty acid has preferably 10 or more carbon atoms, more preferably 12 or more carbon atoms. Moreover, when carbon number of the said fatty acid exceeds 18, stability and persistence of a bubble will deteriorate. Here, it is preferable to use a linear higher fatty acid having 12 to 18 carbon atoms from the viewpoint of foaming power and foam persistence. Furthermore, these are preferably used in combination of two or more. Moreover, the fatty acid obtained by hydrolyzing natural fats and oils, such as coconut oil and palm kernel oil, can also be used conveniently.

  Examples of the salt of the fatty acid salt of component (b) include alkali metal salts and organic amine salts obtained by saponifying or neutralizing fatty acids with an alkali. Examples of the alkali used include inorganic alkalis such as sodium hydroxide, potassium hydroxide, sodium carbonate and potassium carbonate; organic alkalis such as monoethanolamine, diethanolamine, triethanolamine, trimethylamine and triethylamine. In the present invention, it is preferable to use an alkali metal salt from the viewpoint of foaming of the cleaning composition, and a potassium salt is more preferable in order to keep the cleaning composition in a liquid state.

  Content of the component (b) in the liquid cleaning composition of this invention is 5-30 mass%, Preferably it is 7-25 mass%, More preferably, it is 8-20 mass%. If the content of the component (b) is too small, the foaming property is insufficient, and if it is too large, the moisture after drying becomes insufficient.

Furthermore, the mass ratio [b / a] of the content of the component (b) to the content of the component (a) is 2 to 15, preferably 3 to 12, and preferably 4 to 8.
If [b / a] is too small, the foaming property is insufficient, and if it is too large, the sustainability of the bubble is insufficient.

(Component (c))
Component (c) is for thickening, improved feel and improved stability. The water-soluble polymer of component (c) is not particularly limited, and examples thereof include xanthan gum, sodium alginate, guar gum, carboxyvinyl polymer, carboxymethylcellulose, hydroxypropylmethylcellulose, and hydroxyethylcellulose. It may be used alone or in combination of two or more.

  Content of the component (c) in the hair cleaning composition of this invention is 0.05-2 mass%, Preferably it is 0.1-1.5 mass%, More preferably, 0.2-1. 1% by mass. Even if the content of the component (c) is less than 0.05% by mass or exceeds 2% by mass, the low temperature stability is deteriorated.

(Component (d))
The component (d) of the present invention is water, and purified water such as distilled water or ion exchange water can be preferably used.

  As described above, in the present invention, the component (a), the component (b), the component (c) and the component (d) are used in combination as described above, so that the foaming power at the time of cleaning is excellent. A liquid detergent composition having foam persistence, capable of retaining moisture moistened after drying and having good storage stability is obtained.

  In the liquid detergent composition of the present invention, a dramatic improvement in the persistence of bubbles is realized. Although this mechanism of action has not been proved, it can be inferred from the following reason. When a gas-liquid interface is newly formed in the foam, the component (b) having excellent dynamic surface tension is quickly adsorbed from the water to the interface and stabilizes the interface. After component (b) is adsorbed on the interface, component (a) is adsorbed on the interface of the foam film with a delay. At this time, by stabilizing the interface of component (b), entanglement of the polyoxyethylene polymer chain of component (a), thickening of the foam film by component (c), and drainage in the foam film by these three actions This is thought to be due to a drop in speed that dramatically improves the persistence of the foam. When the number of moles of ethylene oxide added as the component (a) is 85 or more, the polyoxyethylene polymer chains are entangled, and the bubbles last for a sufficient time.

(Liquid detergent composition)
Furthermore, other arbitrary components can be added to the liquid detergent composition of the present invention as long as the effects of the invention are not impaired. Examples of such optional components include fats and oils such as vegetable oils and animal fats; hydrocarbon oils such as squalane, liquid paraffin and hydrogenated polyisobutene; higher alcohols such as cetyl alcohol, stearyl alcohol and cetostearyl alcohol; Silicones such as dimethylpolysiloxane and amino-modified polysiloxane; ester oils such as 2-ethylhexyl palmitate, glyceryl tri (capryl / caprate), isopropyl myristate; stearyltrimethylammonium chloride, benzalkonium chloride, cocoylarginine ethyl PCA Anionic surfactants other than component (b) such as polyoxyethylene lauryl ether sulfate and α-olefin sulfonate; alkyldimethyl Amphoteric surfactants such as betaine minoacetate, alkylcarboxymethylhydroxyethylimidazolinium betaine, alkylamidopropyl betaine, alkylhydroxysulfobetaine, alkyliminodiacetate; polyoxyethylene alkyl ether, polyglycerin fatty acid ester, polyoxyethylene Nonionic surfactants other than component (a) such as glycerin fatty acid ester; solvents such as ethanol; pH adjusters such as citrate, succinate, malate and tartrate; antioxidants such as tocopherol; Sugars, amino acids, peptides, preservatives, fragrances, coloring agents, and the like can be appropriately blended.

  The pH value of the liquid detergent composition of the present invention is not particularly limited, but it is preferably 6.5 to 11.0, more preferably 7.0 to 10.0 at 25 ° C. and a 10% by mass aqueous solution. More preferably, it is 7.0-9.0. When the pH is lower than 6.5, foaming properties are insufficient, and when the pH is higher than 11.0, there is a concern about irritation to the skin.

Hereinafter, the present invention will be described more specifically with reference to examples.
<Preparation of liquid detergent composition>
All the raw materials of Examples 1 to 9 and Comparative Examples 1 to 13 shown in Table 1 and Table 2 were put into a beaker and stirred for 1 hour using a propeller while heating in a water bath at 60 ° C. After confirmation of dissolution, it was cooled to 40 ° C. or lower.

<Evaluation of liquid detergent composition>
A usability test was conducted by 20 professional panelists. The forearm and fingers were washed with 3 g of each prepared composition, rinsed with tap water, and lightly wiped with a towel. Next, it was naturally dried for 10 minutes. 1) Each of the panelists evaluated the foaming property at the time of washing, 2) the persistence of the foam, and 3) the moist feeling after drying, according to the following absolute evaluation, and gave a score. The results of each evaluation are shown in Table 1 and Table 2.

1) Foaming property at the time of washing The foaming property when washing the forearm and fingers with 3 g of the liquid detergent composition was evaluated according to the following criteria. An average score of 20 panelists evaluated 3.0 or more as acceptable. However, even if the average score was 3.0 or more, if one or more panelists evaluated as 1 point, it was judged as rejected.
4: Foaming during cleaning is very good.
3: Foaming during cleaning is quite good.
2: There is not much foaming at the time of washing.
1: There is almost no foaming at the time of washing | cleaning.

2) Sustainability of foam during washing The persistence of foam during washing of the forearm and fingers with 3 g of the liquid detergent composition was evaluated according to the following criteria. An average score of 20 panelists evaluated 3.0 or more as acceptable. However, even if the average score was 3.0 or more, if one or more panelists evaluated as 1 point, it was judged as rejected.
4: Very good foam retention.
3: Good bubble retention.
2: Poor foam retention
1: Foam retention is very bad.

3) Moisturizing feeling after drying Wash the forearm and fingers with 3g of the liquid detergent composition, rinse with tap water, wipe off lightly with a towel, and after 10 minutes of skin moisturizing, And evaluated. An average score of 20 panelists evaluated 3.0 or more as acceptable. However, even if the average score was 3.0 or more, if one or more panelists evaluated as 1 point, it was judged as rejected.
4: There is a feeling of moisture.
3: There is a slightly moist feeling.
2: Slightly moisturized.
1: Apply a moist feeling.

4) Low temperature stability 50 g of the liquid detergent composition was placed in a 100 mL screw tube and the appearance when left standing in a thermostatic bath at 5 ° C. for 1 month was visually observed and judged according to the following criteria.
○: Precipitation and cloudiness do not occur, and it is transparent.
Δ: There is a fluorescent color.
La: Crystals are precipitated and cloudy.

  As shown in Table 1, each of the cleaning compositions of Examples 1 to 9 according to the present invention has a sufficient foaming property at the time of cleaning, and the durability of the foam being cleaned is good. There was a moist feeling after drying, and the low temperature stability was good.

  On the other hand, as shown in Table 2, Comparative Examples 1 to 13 did not provide sufficient effects. That is, since the comparative example 1 did not mix | blend a component (a), the sustainability of foam was inadequate. Since the comparative example 2 used more than 12 mass% of components (a), the foamability at the time of washing | cleaning was inadequate.

  In Comparative Examples 3 and 4, POE (60) lauryl ether or POE (30) lauryl ether having an EO addition mole number of less than 85 was used in place of component (a), and thus the foam persistence was insufficient. It was.

In Comparative Example 5, since POE (100) stearyl ether having an alkyl group with 18 carbon atoms was used in place of component (a), the foam persistence and stability were insufficient.
In Comparative Example 6, since polyethylene glycol was used in place of the component (a), the foam persistence was insufficient.

  In Comparative Example 7, since behenate having a carbon number greater than 18 was used as a part of component (b), the foam persistence and the low-temperature stability were insufficient.

  Since the comparative example 8 used less than 5 mass% of components (b), the foamability at the time of washing | cleaning was inadequate. Since the comparative example 9 used more than 30 mass% of components (b), the moisture after drying and low-temperature stability were inadequate.

  Since the comparative example 10 did not mix | blend a component (c), stability was inadequate. In Comparative Example 11, since the component (c) was used in an amount of more than 2% by mass, the stability was insufficient.

  In Comparative Example 12, since the mass ratio [b / a] of the content of the component (b) to the content of the component (a) was smaller than 2, the foamability at the time of washing was insufficient. In Comparative Example 13, since the mass ratio [b / a] of the content of the component (b) to the content of the component (a) was greater than 15, the foam persistence was insufficient.

  The liquid detergent composition of the present invention can be used as a facial cleanser, hand soap, hair shampoo, etc. in addition to body shampoo. In particular, it is preferably used for a liquid detergent composition for skin such as body shampoo, face wash, hand soap and the like.

Claims (1)

The following component (a), component (b), component (c) and component (d) are contained, the content of the component (a) is 0.5 to 12% by mass, and the component (b) Content is 5-30 mass%, Content of the said component (c) is 0.05-2 mass%, Mass ratio of content of the said component (b) with respect to content of the said component (a) [B / a] is 2-15, The liquid detergent composition characterized by the above-mentioned.
(A) the following formula (1);
R ¹ O— (CH ₂ CH ₂ O) n—H (1)
(Wherein R ¹ represents a linear or branched alkyl group or alkenyl group having 10 to 14 carbon atoms, and n represents a number of 85 to 150)
(B) a linear or branched, saturated or unsaturated higher fatty acid salt (c) water-soluble polymer (d) having 8 to 18 carbon atoms )water