KR20140070353A - Cleansing agent - Google Patents

Abstract

The purpose of the present invention is to provide a cleansing agent having thixotropy properties which does not run after being spread and is suitable for the scalp massage, etc. The purpose is solved by the cleansing agent in which a layered clay mineral, high level alcohol, a positive ion surfactant, and a negative ion surfactant are mixed. When each frequency which is measured with a specific condition using a rheometer is 90 rad/s, a storage modulus of the cleansing agent is higher than a loss modulus. A ratio of viscosity at shear velocity of 90s^-1 for viscosity at shear velocity of 18s^-1 is 0.5 or less.

Description

CLEANSING AGENT

The present invention relates to a detergent for cleaning hair, scalp, skin and the like.

A detergent such as a shampoo for cleaning a cleanser or a hair is generally blended with a plurality of surfactants selected from nonionic surfactants, amphoteric surfactants, anionic surfactants, and cationic surfactants. In addition, a raw material suitable for the characteristics required by the user is further compounded in the cleaning agent to further improve its properties, or meet newly required properties.

Patent Document 1 discloses a shampoo which is excellent in bubble diary and can suppress a feeling of being soiled at the time of rinsing. It is a shampoo which contains a cationic surfactant, a solid oil (such as a higher alcohol), a clay mineral and a nonionic polymer compound, A shampoo in which a liquid crystal structure containing an active agent and solid oil as a main component is dispersed has been proposed. As a specific example of this proposal, Patent Document 1 discloses that 4% by mass to 8% by mass of a high-grade alcohol as a solid oil fraction is contained.

There are many other proposals for detergents besides Patent Document 1. Patent Literature 2 discloses a shampoo which is excellent in bubble diurnality, can suppress a stiff feeling at the time of rinsing, is excellent in lubricity after drying, can prevent the hair from becoming sticky, and has a liquid crystal structure stable, A shampoo containing a surfactant, a cationic surfactant, a higher alcohol, and a water-swellable clay mineral and not containing a positive polymer and a cationic polymer has been proposed. Specific examples thereof include those containing 5.5 mass% to 7 mass% of higher alcohol, 1.0 mass% of an anionic surfactant (N-coconut oil fatty acid acyl-L-glutamic acid triethanolamine) and 2.1 mass% of higher alcohol .

The detergent containing the raw materials as described in Patent Document 1 or Patent Document 2 is generally used by being discharged from a pump container. Also from this use method, the cleaning agent is usually set to viscosity or fluidity which facilitates discharge from the pump vessel.

Patent Document 1: Japanese Patent Application Laid-Open No. 2004-307463 Patent Document 2: Japanese Patent Application Laid-Open No. 2005-187342

By the way, in the case of three-legs or facial cleansing, a scalp or facial massage may be performed in the hope of a relaxation effect or the like. In this case, since the scalp or face is massaged for a longer time than the cleaning, it is required to suppress the flow of the cleaning agent. In order to realize this suppression, the viscosity of the cleaning agent may be increased. However, merely increasing the viscosity becomes a detergent having a thixotropic property which is not suitable for massaging.

In view of the above circumstances, it is an object of the present invention to provide a detergent having a thixotropic property which is difficult to flow down after application and is suitable for massaging the scalp and the like.

As a result of intensive studies conducted by the present inventors, it has been found that when the compounding of the layered clay mineral, the higher alcohol and the cationic surfactant in the cleaning agent containing the anionic surfactant as the cleaning component and appropriately adjusting the blending amount of these raw materials, It was found that a detergent having a thixotropic property, which is easy to massage such as scalp, is obtained. Further, it was also found that a cleaning agent having a storage elastic modulus and a loss elastic modulus of a predetermined relationship is difficult to flow down after application. From the above findings, the present invention has been completed.

That is, the cleaning agent according to the present invention is prepared by mixing a layered clay mineral, a higher alcohol, a cationic surfactant, and an anionic surfactant, and measuring a frequency at 90 rad / s measured by a rheometer under the following measurement condition (I) And the ratio of the viscosity at a shear rate of 90 s < ^-1 > to the viscosity at a shear rate of 18 s < ^-1 > measured by the following measurement condition (II) using a rheometer is 0.50 or less .

≪ Measurement conditions (I) >

Sensor: Cone plate sensor with a diameter of 35 mm and inclination angle of 2 °

Stress: 2.0 Pa

Temperature: 25 ℃

≪ Measurement conditions (II) >

Sensor: Cone plate sensor with a diameter of 35 mm and inclination angle of 2 °

Temperature: 25 ℃

It is preferable that the angular frequency is 80 rad / s, and the storage elastic modulus is larger than the loss elastic modulus. Such storage elastic modulus is excellent in suppressing the flow of the cleaning agent after application.

The viscosity ratio may be 0.45 or less. When the viscosity is in this range, it becomes a thixotropic detergent suitable for massaging.

The cleaning agent according to the present invention may be used as a shampoo for washing hair. By using it as a shampoo, massaging of the scalp can be performed at the same time.

The blending amount of the layered clay mineral in the cleaning agent according to the present invention may be 0.1 mass% or more. In the cleaning agent according to the present invention, the blending amount of the higher alcohol may be 1.0 mass% or less. When the layered clay minerals and / or the higher alcohols are blended in such amount, the ratio of the storage elastic modulus and the viscosity is suitable to be set within the above range.

In order to increase the viscosity of the detergent according to the present invention, for example, a fatty acid amide represented by the following general formula (I) may be blended.

Wherein R ¹ -CO represents a fatty acid residue having 12 to 24 carbon atoms, R ² represents an alkanol group having 2 to 4 carbon atoms and R ³ represents an alkane having 2 to 4 carbon atoms Or an alkyl group having 1 to 3 carbon atoms.

The detergent according to the present invention is characterized in that a layered clay mineral, a higher alcohol and a cationic surfactant are blended together with an anionic surfactant, and a storage elastic modulus and a loss elastic modulus at a specific angular frequency are in a predetermined relationship and have thixotropic properties , It is difficult to flow down after application, so that the skin of the scalp and the like can be easily massaged.

1 is a graph of a storage elastic modulus (G ') and a loss elastic modulus (G ") of each example.
2 is a graph of the storage elastic modulus (G ') and the loss elastic modulus (G ") of the comparative example.

The present invention is described below based on embodiments of the present invention.

The cleaning agent according to the present embodiment has a predetermined storage elastic modulus and a predetermined thixotropic property. This cleaning agent is a combination of a layered clay mineral, a higher alcohol, a cationic surfactant, and an anionic surfactant in water (blended amount of water is, for example, 60 mass% or more), and if necessary, a known raw material for a detergent .

(Storage elastic modulus)

The cleaning agent of the present embodiment has the following characteristics. That is, the storage elastic modulus of the cleaning agent of the present embodiment (hereinafter sometimes referred to as "G '") and the loss elastic modulus (hereinafter referred to as "loss elastic modulus" (Hereinafter sometimes referred to as " G ") is measured, G 'and G" are taken as the vertical axis, and the angular frequency , The G 'line crosses the G' line when? Is 90 rad / s or less.

<Rheometer measurement condition>

Sensor: Cone plate sensor with a diameter of 35 mm and inclination angle of 2 °

Stress: 2.0 Pa

Temperature: 25 ℃

The cleaning agent of the present embodiment is such that G 'is larger than G' at ω of 90 rad / s and G 'is greater than G "at ω of 80 rad / s. With such a relationship of G 'and G' ', it is possible to reduce the flow of the cleaning agent after it is applied to the object to be cleaned.

(Thixotropic property)

The viscosity measured by the following measurement condition (II) using the rheometer of the cleaning agent of the present embodiment is low as the shear rate (hereinafter sometimes referred to as "shear rate" is sometimes referred to as "d? / Dt" Lt; / RTI &gt;

&Lt; Measurement conditions (II) >

Sensor: Cone plate sensor with a diameter of 35 mm and inclination angle of 2 °

Temperature: 25 ℃

The rinse agent of the present embodiment has a viscosity ratio (? Ratio) at a shear rate of 90 s ^-1 to a viscosity at a shear rate of 18 s ^-1 of 0.50 or less, preferably has an? Ratio of 0.45 or less, desirable. When the ratio is within this range, the cleansing agent having a thixotropic property is elongated when a force necessary for massaging is applied. Therefore, it is easy to massage the skin of the scalp or the like. The lower limit of the? Ratio is not particularly limited, but is, for example, 0.15.

The viscosity of the cleaning agent of the present embodiment may be 5 Pa · s or more and 10 Pa · s or less under the condition of dγ / dt of 36 s ^-1 .

(Laminar clay mineral)

The layered clay mineral mixed with the cleaning agent of the present embodiment has a property of accepting water molecules. The layered clay minerals remove dirt and waste on the skin.

The cleaning agent of the present embodiment may be blended with one or more kinds selected from known layered clay minerals such as kaolin, smectite and bentonite. The blending amount in the layered clay mineral of the present embodiment is preferably from 0.1 mass% to 2.0 mass%, more preferably from 0.3 mass% to 1.0 mass%. By setting the content to 0.1% by mass or more, it is suitable for setting G 'and eta ratios for ease of falling down and ease of massaging after application, and 2.0% by mass or less makes it easy to suppress precipitation of the layered clay minerals.

(High alcohol)

When the high alcohol is mixed with the cleaning agent of the present embodiment, it is possible to improve the feel of the hair.

When a high alcohol is blended in the cleaning agent of the present embodiment, examples of the high alcohol include straight chain saturated alcohols such as cetyl alcohol, stearyl alcohol, arachyl alcohol and behenyl alcohol; Linear unsaturated alcohols such as oleyl alcohol; And branched saturated alcohols such as hexyldecanol, octyldodecanol, isocetyl alcohol and isostearyl alcohol.

And higher alcohols may be added to the cleaning agent of the present embodiment. The amount of the higher alcohol in the cleaning agent of the present embodiment is preferably 1.0% by mass or less, more preferably 0.8% by mass or less, and most preferably 0.5% by mass or less. If it is 1.0% by mass or less, it is suitable for setting the G 'and the eta ratios so as to make it easy to suppress the flow down after application and massage, and if it exceeds 1.0% by mass, G' at 90 rad / The lower limit of the amount of the higher alcohol is, for example, 0.1% by mass.

(Cationic surfactant)

When a cationic surfactant is mixed with the cleaning agent of the present embodiment, a liquid crystal is formed together with a higher alcohol to impart a cream-like texture. Further, by the above blending, it is possible to improve the feel of the hair.

When a cationic surfactant is blended with the cleaning agent of the present embodiment, examples of the cationic surfactant include distearyldimethylammonium salts of distearyldimethylammonium chloride, dicetyldimethylammonium chloride and dicyclohexyldimethylammonium chloride; Mono long-chain alkyl trimethyl ammonium salts such as behenyl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride, stearyl trimethyl ammonium bromide, and cetyl trimethyl ammonium bromide; and long-chain alkoxy alkyl trimethyl ammonium salts such as stearoxypropyl trimethyl ammonium chloride. The term &quot; long chain alkyl &quot; as used herein means a straight chain or branched alkyl group having at least 8 carbon atoms. When the number of carbon atoms is 16 or more and 22 or less, it is preferable from the viewpoints of suppression of irritation to the skin and feeling given to the hair.

And a cationic surfactant may be added to the cleaning agent of the present embodiment. The amount of the cationic surfactant to be blended in the cleaning agent of the present embodiment may be such an amount that the cleaning function can be secured by significantly reducing the amount of the cationic surfactant, for example, 0.5 mass% or less. The lower limit of the blending amount is, for example, 0.1 mass%.

(Anionic surfactant)

The cleaning agent of the present embodiment may be blended with a known anionic surfactant as a cleaning component.

Examples of the anionic surfactant include sulfuric acid anionic surfactants such as alkyl sulfates, alkyl ether sulfates, alkylaryl ether sulfates, fatty acid alkanolamide sulfates and fatty acid monoglyceride sulfates; Sulfosuccinic acid salts,? -Olefin sulfonic acid salts,? -Sulfo fatty acid methyl ester salts, acyl isethionates, alkyl glycidyl ether sulfonic acid salts, alkylsulfosuccinate salts, alkylsulfonic acid salts, alkylbenzenesulfonic acid salts, alkylnaphthalenesulfonic acid salts , N-acylmethyltaurine salts and the like; Carboxylic acid anionic surfactants such as alkyl ether carboxylate, fatty acid amide ether carboxylate, fatty acid amide ether carboxylic acid and acyl lactate.

One or more anionic surfactants may be blended into the cleaning agent of the present embodiment. The blending amount of the anionic surfactant in the cleaning agent of the present embodiment is not particularly limited, but is preferably 5% by mass or more and 15% by mass or less, more preferably 8% by mass or more and 15% by mass or less in order to exhibit sufficient washing power.

(Arbitrary raw material)

The arbitrary raw material to be mixed with the cleaning agent of the present embodiment is suitably selected from raw materials of known detergent as a raw material such as shampoo. This raw material can be used as a raw material in the form of a nonionic surfactant, an amphoteric surfactant, a polyhydric alcohol, a saccharide, an ester oil, a preservative, a polymer compound, an amino acid, an animal or plant extract, a microbial derivative, to be.

When the viscosity of the cleaning agent of the present embodiment is to be increased, for example, a fatty acid amide represented by the following general formula (I) may be blended.

Wherein R ¹ -CO represents a fatty acid residue having 12 to 24 carbon atoms, R ² represents an alkanol group having 2 to 4 carbon atoms and R ³ represents an alkane having 2 to 4 carbon atoms Or an alkyl group having 1 to 3 carbon atoms.

Examples of R ¹ -CO in the general formula (I) include fatty acid residues such as lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, palm oil fatty acid, isostearic acid, isopalmitic acid, have. Examples of R ² in the general formula (I) include a hydroxyethyl group, a hydroxypropyl group and a hydroxyisopropyl group. Examples of R ³ include a hydroxyethyl group, a hydroxypropyl group, a hydroxyisopropyl group, a methyl group and an ethyl group.

Examples of the fatty acid amide represented by the general formula (I) include diethanol amide laurate, diethanol amide myristate, diethanol amide stearate, diethanol amide palm oil, lauric acid N-methylethanolamide, myristic acid N -Methylethanolamide, stearic acid N-methylethanolamide and palm oil fatty acid N-methylethanolamide.

And one or more selected from the above-mentioned fatty acid amides may be added to the cleaning agent of the present embodiment. The blending amount of the fatty acid amide in the cleaning agent of the present embodiment is, for example, 1% by mass or more and 5% by mass or less.

(pH)

The pH of the cleaning agent of the present embodiment may be a pH of a general detergent, for example, 5.0 or more and 7.0 or less.

(Manufacturing method)

The method for producing the cleaning agent of the present embodiment includes, for example, a method of mixing other than the layered clay mineral and thoroughly dispersing the raw material by stirring while warming, then blending the layered clay mineral and stirring.

(Usage)

The cleaning agent of the present embodiment is used for applications involving cleaning of the skin. Examples of the use include shampoo, cleanser, and the like for cleaning hair. Since it is a cleaning agent having a thixotropic property, it may be filled in a tube container.

[Example]

Hereinafter, the present invention will be described in detail on the basis of examples, but the present invention is not limitedly interpreted based on the description of this example.

Water, and Moroccan lavage clay, higher alcohol, behenyl trimethyl ammonium chloride, sodium polyoxyethylene lauryl ether sulfate (2E.O.), disodium lauryl polyoxyethylene sulfosuccinate, sodium coconut fatty acid ethyl ester sulfonate, palm oil fatty acid N -Methylethanolamide, lauryl glycol hydroxypropyl ether, palm oil fatty amide propyl betaine, isostearamidopropyl betaine, polyquaternium-10, polyquaternium-52, xanthan gum, distearic acid ethylene glycol, shea butter , Polyethylene glycol 1540, dipropylene glycol, glycerin, isopropanol, sodium chloride, citric acid, and fragrance were mixed to prepare the cleaning agents of the following examples.

The storage elastic modulus (G '), the loss elastic modulus (G') and the viscosity (?) Were measured using a rheometer "Rheo Stress 6000" manufactured by HAAKE Co., The measurement was performed under the conditions of a cone plate sensor (diameter 35 mm, inclination angle 2 deg.), Stress 2.0 Pa, and temperature 25 deg. C at an angular frequency of 92 rad / s or less in a frequency dependent mode. The measurement of? was carried out under the conditions of a shear rate (d? / dt) of 18 s ^{-1 to} 90 s ^-1 , a cone plate sensor (diameter 35 mm, inclination angle 2 °) and a temperature of 25 ° C in a normal flow curve mode.

The sensory evaluation of ease of scalp massaging (ease of massaging) was performed as follows with respect to the cleaning agent of the examples. After washing with hot water, the cleansing agent was applied evenly over the entire hair and scalp to remove the water, and the entire scalp was massaged thoroughly. Regarding easiness of massage at this time, 5 evaluators were evaluated based on the use of the cleaning agent of Example 3. The evaluation results are as follows.

&Amp; cir &amp;: All 5 evaluators evaluated that massage was easier than the standard (Examples 1 and 4).

?: Three evaluators evaluated that massage was easier than the standard (Example 2).

Table 1 shows the results of measurement of raw materials and blending amount, and G ', G' ', and eta in combination with water for the preparation of the detergent of the examples. . Fig. 1 shows a graph based on the measured values of G 'and G' in the respective embodiments.

In Table 1, the following (1) to (3) can be confirmed. Further, it has been confirmed that the compounding of the layered clay mineral, the higher alcohol and the cationic surface active agent improves the suppression of flow-down and the thixotropy and facilitates massaging.

(1) The η ratio was lower than 0.50 (the thixotropy property became higher), and the massage was easier.

(2) In view of the difference between G 'and G' 'at ω = 90 rad / s, if the blend amount of higher alcohol is increased, G' at 90 rad / s becomes smaller than G ' (In contrast to Examples 1 and 2).

(3) The possibility of the above (2) is higher when the viscosity is increased by blending the fatty acid amide, palm oil fatty acid N-methylethanolamide (in contrast to Examples 2 and 4).

From the diagrams of G 'and G "in Fig. 1, G' of the cleaning agents of Examples 1 to 4 was a value larger than G 'at ω = 90 rad / s, And G 'of the cleaning agent of 4 was a value larger than G' at? = 80 rad / s.

The cleaning agent of the comparative example was prepared by mixing water with a surfactant such as sodium polyoxyethylene lauryl ether sulfate (2EO), sodium tetradecenesulfonate, sodium polyoxyethylene lauryl etherate (6EO), N-lauroyl- (40E.O.), polyoxyethylene lauryl ether (16E.O.), palm oil fatty acid (16E.O.), coconut fatty acid ethyl ester sulfonate, sodium coconut oil fatty acid N-methylethanolamide, pyroglutamic acid isostearic acid polyoxyethylene hardened castor oil Amide propyl betaine, isostearic acid amide propyl betaine, polyquaternium-10, polyquaternium-52, dipropylene glycol, glycerin, sodium chloride, preservative, and perfume.

G 'and G "for the cleaning agent of the comparative example were measured in the same manner as the cleaning agent of the above example. Table 2 shows the raw materials and blending amount combined with water and the measurement of G' and G" for preparation of the cleaning agent of the comparative example Results are shown. 2 shows a graph based on the measured values of G 'and G "in the comparative example.

It can be seen from Table 2 and FIG. 2 that the cleaning agent of the comparative example in which the layered clay mineral, the higher alcohol and the cationic surfactant are not blended had a relationship of G '<G "indicating fluidity at ω = 90 rad / s or less .

Claims (7)

A layered clay mineral, a higher alcohol, a cationic surfactant, and an anionic surfactant,
The storage elastic modulus at an angular frequency of 90 rad / s measured by the following measurement condition (I) using a rheometer is larger than the loss elastic modulus,
Wherein the ratio of the viscosity at a shear rate of 90 s < ^-1 > to the viscosity at a shear rate of 18 s < ^-1 > measured by the following measurement conditions (II) using a rheometer is 0.50 or less.
&Lt; Measurement conditions (I) &gt;
Sensor: Cone plate sensor with a diameter of 35 mm and inclination angle of 2 °
Stress: 2.0 Pa
Temperature: 25 ℃
&Lt; Measurement conditions (II) &gt;
Sensor: Cone plate sensor with a diameter of 35 mm and inclination angle of 2 °
Temperature: 25 ℃ The cleaning agent according to claim 1, wherein the angular frequency is 80 rad / s, and the storage elastic modulus is larger than the loss elastic modulus. The cleaning agent according to claim 1 or 2, wherein the ratio of the viscosity is 0.45 or less. The detergent according to claim 1 or 2, which is used as a shampoo for washing hair. The cleaning agent according to claim 1 or 2, wherein the compounding amount of the layered clay mineral is 0.1% by mass or more. The cleaning agent according to any one of claims 1 to 3, wherein the blended amount of the higher alcohol is 1.0% by mass or less. The detergent according to claim 1 or 2, wherein a fatty acid amide represented by the following general formula (I) is incorporated.

Wherein R ¹ -CO represents a fatty acid residue having 12 to 24 carbon atoms, R ² represents an alkanol group having 2 to 4 carbon atoms and R ³ represents an alkane having 2 to 4 carbon atoms Or an alkyl group having 1 to 3 carbon atoms.

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