JP4416084B2 - Cleaning composition - Google Patents

Description

  The present invention relates to a paste-solid cleaning composition for cleaning human skin, hair, and the like. More specifically, it is a water-based composition that has no stability problems such as water separation, is excellent in foaming properties, usability, etc., and has a low irritation to skin and hair. The present invention relates to a cleaning composition.

  Pasty and solid detergents are often used in facial cleansers and hair cleansing agents because they spread smoothly without dripping when applied to the skin or hair.

By the way, acyltaurine salts are used for detergents because of their low irritation and high foaming properties. For example, a fluid composition containing an acyltaurine salt and a compound having an —SO ₃ — group (see Patent Document 1). , A solid detergent composition containing an acyl taurine salt and a higher fatty acid and / or higher alcohol (see Patent Document 2), a detergent composition containing a secondary amide type N-acyl taurine salt and a cationic polymer (Patent Document) 3) and the like have been proposed in various liquid to solid dosage forms. In the cleaning compositions described in Patent Documents 1 to 3, sodium, potassium, and the like are used as the counter ion of the acyl taurine salt. However, when sodium is used as the counter ion of the acyl taurine salt, the paste is immediately after preparation. Even a formulation gels with time and causes significant water separation. In addition, when potassium is used as a counter ion, a very hard structure is formed from the beginning, water solubility is poor, and it is not suitable for use as a cleaning material.

  Thus, as an acyl taurine composition with improved water solubility, a surfactant composition in which 0.5 to 2.0 mol of an alkali metal halide compound coexists with 1 mol of the acyl taurine composition has been proposed ( (See Patent Document 4). However, when trying to apply the composition described in Patent Document 4 to a skin cleanser, the presence of such a large amount of alkali halide causes irritation to the skin and cannot be used in practice. Crystallization of acyl taurine is remarkable due to precipitation, and it cannot be said that it is a paste.

JP 2003-221305 A JP-A-8-245981 JP-A-8-253791 Japanese Patent Laid-Open No. 2004-67840

  The present invention has been made in view of the above circumstances, is based on water, has no problem of stability such as water separation, is excellent in foaming properties, usability, etc., and has less irritation to skin and hair. An object is to provide a solid detergent composition.

As a result of intensive studies to solve the above problems, the present inventor made the sodium salt and potassium salt of N-acylated taurine coexist at specific ratios, and the total amount thereof was in an appropriate range, Furthermore, by adding an inorganic salt , a detergent composition having moderate hardness, excellent stability, foaming property and usability suitable as a detergent, and low irritation to skin and hair. As a result, the present invention was completed.

That is, the present invention comprises (a) a sodium salt of N-acylated taurine represented by the following general formula (I), (b) a potassium salt of N-acylated taurine represented by the following general formula (II), c) containing an inorganic salt , (d) water, (a) component: (b) component = 7: 1 to 1: 1 (mass ratio), and (a) component and (b) component Provided is a paste or solid detergent composition having a total amount of 10 to 30% by mass and a melting point of the composition of 40 ° C. or higher.

R ₁ CONHCH ₂ CH ₂ SO ₃ Na (I)
R ₂ CONHCH ₂ CH ₂ SO ₃ K (II)

[In General Formulas (I) and (II), R ₁ and R ₂ each independently represents an alkyl group or alkenyl group having 7 to 17 carbon atoms]

  Further, in the present invention, in the component (c), a metal ion salt of the same type as the counter ion of the component (a) and the component (b) is converted into a metal ion salt different from the counter ion of the component (a) and the component (b). The cleaning composition is contained in a ratio (molar ratio) of 1 or more.

  Moreover, this invention provides the said cleaning composition whose compounding quantity of (c) component is 1-10 mass%.

  The present invention further provides (e) the above-described cleaning composition containing a trivalent or higher polyol.

  Moreover, this invention provides the said cleaning composition whose compounding quantity of (e) component is 2-40 mass%.

  According to the present invention, it is possible to obtain a paste-solid cleaning composition that is free of stability problems such as water separation, is excellent in foaming properties, usability, and has little irritation to skin and hair. Play.

  Hereinafter, the present invention will be described in detail.

  The sodium salt of N-acylated taurine as the component (a) in the present invention is a compound represented by the following general formula (I).

R ₁ CONHCH ₂ CH ₂ SO ₃ Na (I)

(In the above formula, R ₁ represents an alkyl or alkenyl group having 7 to 17 carbon atoms)

  Specific examples of the component (a) include lauroyl taurine sodium, myristoyl taurine sodium, stearoyl taurine sodium, and cocoyl taurine sodium.

  The potassium salt of N-acylated taurine as the component (b) in the present invention is a compound represented by the following general formula (II).

R ₂ CONHCH ₂ CH ₂ SO ₃ K (II)

(In the above formula, R ₂ represents an alkyl group or alkenyl group having 7 to 17 carbon atoms)

  Specific examples of the component (b) include, for example, lauroyl taurine potassium, myristoyl taurine potassium, stearoyl taurine potassium, cocoyl taurine potassium, and the like.

  In the present invention, the blending ratio (mass ratio) of the component (a) and the component (b) is 7: 1 to 1: 1, preferably 6: 1 to 2: 1. If there is more component (a) than the above blending ratio, it will change from a paste to a gel over time and water separation will easily occur. On the other hand, if there is more (b) component than the above blending ratio, crystallinity will increase. It becomes extremely hard and leads to poor water solubility, so it is not suitable for actual use as a cleaning agent.

  Moreover, in this invention, the total amount of (a) component and (b) component is 10-30 mass% in a composition whole quantity, Preferably it is 10-25 mass%. When the total amount of the component (a) and the component (b) is less than 10% by mass, it is difficult to form a paste, and excessive moisture tends to separate, and foaming when used as a cleaning agent is insufficient. If it exceeds 30% by mass, it becomes hard and unsuitable for use.

The inorganic salt component (c) used in the present invention, sodium, potassium, magnesium, chloride calcium, sulfated, bromides and the like Ru are preferably used.

  Component (c) can be used alone or in combination of two or more, but at least one of component (c) is a metal ion salt of the same kind as the counter ion of component (a) and component (b) (= sodium) Salt, potassium salt). In addition, in the component (c), the same kind of metal ion salt as the counter ion of the component (a) and the component (b) is 1 or more for the metal ion salt different from the counter ion of the component (a) and the component (b). It is preferable to contain in the ratio (molar ratio). When the “(a) component, the metal ion salt of the same type as the counter ion of the component (b) / (a) component, the metal ion salt of a different type from the counter ion of the component (b)” (molar ratio) is less than 1, the eutectic point Depending on the phenomenon, the craft point of the component (a) and the component (b) may not be sufficiently increased, resulting in poor stability.

  (C) Although the compounding quantity of a component is not specifically limited as long as the melting point of a composition can be 40 degreeC or more in coexistence with another compounding component, about 1-10 mass% is preferable. If the component (c) is excessive, a feeling of sticking may occur during use.

  As the water of component (d), the remaining amount of other components blended in the cleaning composition of the present invention is blended.

  The cleaning composition of the present invention contains the components (a) to (d) as essential components, has a melting point of 40 ° C. or higher, and exhibits a paste or solid form. The paste form in the present invention means a state in which hydrated crystals of the component (a) and the component (b) are precipitated, and thus the appearance is cloudy and the hardness is 3000 mPa · s (30 ° C., B type). Viscometer) or more is preferable.

  In the present invention, in addition to the above components (a) to (d), in order to maintain a more stable paste-solid state at a high temperature, the component (e) is further substituted with water to obtain a trivalent or higher valence. A polyol may be blended. Examples of such polyols include polyhydric alcohols such as glycerin, sorbitol, xylitol and erythritol, and sugars such as sugar alcohol, sucrose and trehalose, and are preferably used. (E) 1 type (s) or 2 or more types can be used for a component.

  (E) As for the compounding quantity of a component, 2-40 mass% is preferable in this invention cleaning composition.

  In this invention, (a) component and (b) component are mix | blended in a specific compounding ratio and a total compounding amount range, and (c)-(d) component is mix | blended here, Mainly by (c) component. When the salting out effect and (e) component are further included, the (a) component and (b) component existing in the composition system gradually dissolve due to the change in the hydrogen bonding state of water by the (e) component. It becomes difficult and the melting point of the system of the composition finally obtained becomes higher than 40 degreeC. In addition, the moisture of the skin is improved by blending the component (e).

  In addition to the above components, the cleaning composition of the present invention includes anionic surfactants, amphoteric surfactants, nonionic surfactants, powder components, oils and fats, polymers, UV absorbers, saccharides, amino acids , Sequestering agents, antioxidants, preservatives, pH adjusters, anti-inflammatory agents, whitening agents, plant extracts, activators, anti-inflammatory agents, etc. it can. However, it is not limited to these examples. The detergent composition of the present invention can be produced by a conventional method.

  The present invention is suitably used for skin cleansers (for example, facial cleansers, body shampoos, etc.) and hair cleansers (for example, shampoos, etc.).

[Example]
The present invention will be described more specifically with reference to the following examples. In addition, this invention is not limited at all by this. Unless otherwise specified, all the amounts are mass%.

  First, the evaluation method used in the present invention will be described.

[Stability]
After the sample was manufactured, the state after storage at 40 ° C. for 4 weeks was visually determined. The evaluation criteria are as follows.
(Evaluation)
◎: No change in appearance or water separation, etc. ○: Gelation is observed slightly, but water separation does not occur. △: Gelation or water separation is slightly observed, or dissolved to form a liquid ×: Water separation is observed Clearly seen

[Hardness]
The sample was put in a tube, and the condition of the tube was evaluated by a panel (10 persons). The evaluation criteria are as follows.
(Evaluation)
◎: 8 or more responded that the sample was easily removed from the tube. ○: 6-7 responded that the sample was easily removed from the tube. △: 3 to 5 responded that the sample was easily removed from the tube. ×: 2 or less responded that the sample was easily removed from the tube.

[Bubbling]
An actual use test was conducted by a special panel (10 persons) to evaluate foaming. The evaluation criteria are as follows.
(Evaluation)
◎: 8 or more responded that foaming was good ○: 6-7 responded that foaming was good △: 3-5 responded that foaming was good ×: 2 or less responded that foaming Replied

[Foam quality (creamy)]
An actual use test was carried out by a special panel (10 persons), and the foam quality (creaminess) at the time of foaming was evaluated. The evaluation criteria are as follows.
(Evaluation)
◎: 8 or more responded that the foam quality was creamy ○: 6-7 responded that the foam quality was creamy △: 3-5 responded that the foam quality was creamy ×: Less than 2 responded that the foam quality was creamy

[Smoothness]
An actual use test was carried out by a special panel (10 persons), and the smoothness of the skin after drying was evaluated. The evaluation criteria are as follows.
(Evaluation)
◎: 8 or more responded that there was smoothness after drying ○: 6-7 responded that there was smoothness after drying △: 3-5 responded that there was smoothness after drying ×: 2 or less responded that there was smoothness after drying

[Moistness]
An actual use test was conducted by a professional panel (10 persons) to evaluate the moist skin after drying. The evaluation criteria are as follows.
(Evaluation)
◎: 8 or more responded that they were moist after drying ○: 6-7 responded that they were moist after drying △: 3-5 responded that they were moist after drying ×: Less than 2 responded that they were moist after drying

[Feeling when using]
An actual use test was conducted by a special panel (10 persons) to evaluate the feeling of sticking when the sample was applied directly to the face and then washed. The evaluation criteria are as follows.
(Evaluation)
◎: 8 or more responded that there was no feeling of sticking in use. ○: 6-7 responded that there was no feeling of sticking in use. △: 3 to 5 persons did not feel sticking in use. ×: Less than 2 responded that there was no feeling of sticking in use

  The melting point of the sample was determined by measuring the endothermic peak of the sample with respect to water at the time of temperature rise using a differential thermal analyzer (DSC), and setting the peak top as the melting point.

(Test Examples 1-6)
Samples having the composition shown in Table 1 below were prepared, and the stability, hardness, foaming, foam quality (creaminess), smoothness, moistness, and feeling of sticking in use were evaluated according to the above evaluation criteria. The results are shown in Table 1.

  As is clear from Test Examples 1 and 2 above, the detergent composition within the scope of the present invention exhibits a paste-solid form, stability, hardness, foaming, foam quality (creamy), smoothness, and moist. In addition, it was excellent in any evaluation of the feeling of sticking during use.

  On the other hand, as in Test Example 3 above, in the system containing the component (a) but not containing the component (b), the melting point is 40 ° C. or higher, but it gels with time and the hardness increases, and significant water separation occurs. This is very unstable. Further, as in Test Example 4 above, in the system containing the component (b) but not containing the component (a), foaming is not good because it is very hard and poor in water solubility. Further, as in Test Example 5 above, when the total amount of the component (a) and the component (b) is less than 10% by mass, the stability is poor and water separation is observed at 40 ° C., and foaming is not good. Further, as in Test Example 6, when the total amount of the component (a) and the component (b) exceeds 30% by mass, it is hard, water solubility becomes poor, and foaming is not sufficient.

(Test Examples 7 to 12)
As shown in Table 2 below, samples with the same total amount of the component (a) and the component (b) and different blending ratios (mass ratios) were prepared, and stability and hardness were determined according to the above evaluation criteria. Evaluation was made on foaming, foam quality (creaminess), smoothness, moistness, and feeling of sticking in use. The results are shown in Table 2.

  As apparent from Test Examples 7 to 11, the detergent composition in the range of (a) component: (b) component = 7: 1 to 1: 1 (mass ratio) is stable, hard, It was excellent in all evaluations of foaming, foam quality (creaminess), smoothness, moistness, and feeling of sticking in use. In particular, in (a) component: (b) component = 6: 1 to 2: 1 (mass ratio), particularly excellent evaluation was obtained in any item (Test Examples 9 and 10).

  On the other hand, as in Test Example 7 described above, when the blending ratio of component (a) is high, the stability tends to deteriorate, and water separation and gelation occur. Further, as in Test Example 12 above, when the blending ratio of component (b) is high, it tends to become harder, water solubility is worsened, and foaming is extremely low.

(Test Examples 13 to 17)
As shown in Table 3 below, samples with different amounts of component (a) and component (b) were fixed and components (c) were changed, and stability and hardness were determined according to the above evaluation criteria. Evaluation was made on foaming, foam quality (creaminess), smoothness, moistness, and feeling of sticking in use. Moreover, the influence which the presence or absence of the addition of (e) component had was investigated. The results are shown in Table 3.

  In the above Test Examples 13, 14, and 16, excellent results were obtained in all the evaluation items. However, when the component (c) was blended in many cases (Test Example 14), there was slight skin irritation. There was a trend.

  On the other hand, as in Test Examples 15 and 17, when the component (c) was not blended, the foam quality (creaminess) was not obtained and the stability was inferior.

  Further, as is clear from the comparison between Test Example 13 and Test Example 16, the effects of stability, hardness, and foam quality are further improved by adding the component (e) to the system of the components (a) to (d). It was found that the component (e), in particular, contributed greatly to the moisturizing effect.

Paste face wash (combination component) (mass%)
Cocoyl taurine sodium 12
Cocoyl taurine potassium 3
PEG8 glyceryl isostearate 3
Sodium chloride 2
Potassium chloride 1
Glycerin 15
Propylene glycol 5
1,3-butylene glycol 5
pH adjuster appropriate amount Preservative appropriate amount perfume appropriate amount water residue
(Total amount 100)
(Manufacturing method)
All of the above components were stirred and mixed at 70 ° C. to prepare a pasty face wash. The resulting paste-like face wash has good stability (40 ° C, 4 weeks), easy to remove from the tube, foaming and foam quality (creaminess), and smooth and moist skin after use. It had good usability. The melting point of the system was 45 ° C.

Semi-solid face wash (combination component) (mass%)
Lauroyl taurine sodium 16
Myristoyl taurine potassium 4
Cocoyl methyl taurine sodium 3
Sodium chloride 2
Glycerin 25
Trehalose 3
CH ₃ O [(EO) ₁₄ / (PO) ₇ ] CH ₃ 3
pH adjuster appropriate amount Preservative appropriate amount perfume appropriate amount water residue
(Total amount 100)
(Manufacturing method)
All of the above components were stirred and mixed at 70 ° C. to prepare a semi-solid face wash. The obtained semi-solid face wash has good stability (40 ° C., 4 weeks), foaming and foam quality (creaminess), and excellent usability such as smoothness and moistness after use. It was. The melting point of the system was 48 ° C.

Paste hair wash (combination component) (mass%)
Lauroyl taurine sodium 15
Cocoyl taurine potassium 3
Cocoylamidopropylbetaine 4
Potassium chloride 3
Sorbitol 20
Erythritol 1
pH adjuster appropriate amount Preservative appropriate amount perfume appropriate amount water residue
(Total amount 100)
(Manufacturing method)
All of the above components were stirred and mixed at 70 ° C. to prepare a paste-like hair wash. The obtained paste-like hair cleanser has good stability (40 ° C, 4 weeks), easy to put out from the tube, foaming and foam quality (creaminess), and smooth and moist skin after use. It had excellent usability. The melting point of the system was 48 ° C.

Semi-solid body wash (combination component) (mass%)
Cocoyl taurine sodium 16
Lauroyl taurine potassium 4
POE (2) sodium lauryl sulfate 5
Sodium chloride 4
Glycerin 30
Sorbitol 3
pH adjuster appropriate amount Preservative appropriate amount perfume appropriate amount water residue
(Total amount 100)
(Manufacturing method)
All of the above components were stirred and mixed at 70 ° C. to prepare a semi-solid body wash. The obtained semi-solid body cleanser has good stability (40 ° C, 4 weeks), foaming and foam quality (creamy), and excellent usability in smoothness and moisturization after use. It was. The melting point of the system was 50 ° C.

Claims (5)

(A) a sodium salt of N-acylated taurine represented by the following general formula (I), (b) a potassium salt of N-acylated taurine represented by the following general formula (II), and (c) an inorganic salt , (D) containing water, the above (a) component: (b) component = 7: 1 to 1: 1 (mass ratio), and the total amount of (a) component and (b) component is 10 to 10. A paste-form or solid-state detergent composition that is 30% by mass and has a melting point of 40 ° C. or higher.
R ₁ CONHCH ₂ CH ₂ SO ₃ Na (I)
R ₂ CONHCH ₂ CH ₂ SO ₃ K (II)
[In the general formulas (I) and (II), R ₁ and R ₂ each independently represents an alkyl group or alkenyl group having 7 to 17 carbon atoms]   In the component (c), at least one metal ion salt of the same type as the counter ion of the component (a) and (b) is one or more than the metal ion salt of a different type from the counter ion of the component (a) and component (b). The cleaning composition of Claim 1 contained in a ratio (molar ratio).   (C) The cleaning composition of Claim 1 or 2 whose compounding quantity of a component is 1-10 mass%.   The cleaning composition according to any one of claims 1 to 3, further comprising (e) a trivalent or higher polyol. (E) The cleaning composition of Claim 4 whose compounding quantity of a component is 2-40 mass%.