JP6103210B2 - Skin cleanser composition - Google Patents

Description

  The present invention relates to a skin cleansing composition such as a body soap and a hand soap using a thickener, a fatty acid salt, and an acylamino acid-based anionic surfactant.

  Conventionally, various fatty acid salts and surfactants have been used as skin cleansing agents such as body soaps and hand soaps. Such a cleaning agent is required to have a low viscosity and an appropriate viscosity in addition to high detergency and good foaming. In order to alleviate the irritation of the fatty acid salt, an acylamino acid type anionic surfactant with less skin irritation is used. However, since the amino acid type surfactant is a base that is difficult to increase the viscosity at the time of blending, it is important to add a suitable thickener to increase the viscosity. Polymeric thickeners are widely used additives because of their high thickening effect, but there is a problem that the feeling of slimming is strong when using a cleaning agent, it takes time to rinse, and the feeling of use is significantly reduced. May occur. In addition, a detergent to which a polymer thickener is added tends to have a large viscosity change due to temperature. The viscosity of a general body jumper or hand soap is 500 mPa · s to 2000 mPa · s, and a pump type is frequently used. However, when the temperature of the operating environment is high, the liquid will pop out when the pump is pressed. Even when the pump-type container is not used, there arises a problem that the cleaning agent flows down from the hand and towel when taken out.

  Further, a refreshing feeling of use can be obtained from a skin cleanser containing a fatty acid salt, but a feeling of bulkiness or a feeling of tension may be felt due to a decrease in moisture on the skin after washing. Therefore, there is a demand for a detergent composition that can feel a moist feeling without feeling a feeling of bulkiness or a feeling of tension after use.

  Skin cleansing compositions containing amino acid surfactants and polymer thickeners include hydroxyalkyl-modified starch phosphate crosslinks (thickeners), fatty acid salts, and acylamino acid anionic surfactants. (Patent Document 1). Here, effects on foam quality, foam stability, and thickening effect are described, but no improvement has been made with respect to moist feeling, sliminess, and changes in viscosity due to temperature. In the detergent composition containing a nonionic polymer (thickener), a fatty acid salt, an amide ether sulfate type anionic surfactant and an alkanol amide type surfactant (Patent Document 2), an acylamino acid type is used. Although the effect on the change in viscosity over time when combined with an anionic surfactant has been shown, no improvement on the change in viscosity due to temperature has been made.

JP 2005-232049 A JP-A-10-158686

  An object of the present invention is to contain a fatty acid salt, an acylamino acid-based anionic surfactant, and a surfactant thickener effective for thickening the same, and does not give a slimy feeling when used, and has a moist feeling after use. It is an object of the present invention to provide a skin cleanser composition that is obtained and has a small viscosity change with temperature.

  As a result of intensive studies, the present inventors have found that the detergent composition having the following general formula (1) has a small viscosity change due to temperature, does not feel slimy when used, and feels moist after use. The feature of being able to be found was found and the present invention was reached.

（式（１）中、Ｍは、水素原子、アルカリ金属原子、１／２アルカリ土類金属原子、アンモニウム、有機アンモニウム、アミノ酸、アミノ酸アルカリ金属塩、タウリン、Ｎ−メチルタウリン、タウリンのアルカリ金属塩、またはＮ−メチルタウリンのアルカリ金属塩を示す。） That is, the present invention is as follows.
(1) The following component (a), component (b), and component (c) are contained, the ratio of component (a) is 0.01-5 mass%, and the ratio of component (b) is 5-30 mass%. The ratio of component (c) is 1.0 to 20% by mass, and the mass ratio ((b) / (c)) of component (b) to component (c) is 1/2 to 20/1. , Component (a), component (b) and component (c) in a total ratio of 10 to 50% by mass, with the balance being water, skin cleanser composition (a) represented by the following formula (1) (B) Alkali metal salt, ammonium salt or organic ammonium salt of fatty acid having 8 to 22 carbon atoms (c) Acyl amino acid anionic surfactant

(In the formula (1), M is a hydrogen atom, an alkali metal atom, a 1/2 alkaline earth metal atom, ammonium, an organic ammonium, an amino acid, an amino acid alkali metal salt, taurine, N-methyltaurine, or an alkali metal salt of taurine. Or an alkali metal salt of N-methyltaurine.)

(2) The skin cleanser composition according to [1], wherein component (c) is an acylmethyl taurate salt

  According to the present invention, it is possible to provide a skin cleanser composition that has a small viscosity change due to temperature, does not feel slimy when used, and can feel moist after use.

(Component (a): Compound of formula (1))
The compound of the formula (1) has a thickening action on the surfactant, and the cleaning composition containing the compound can give a moist feeling after use.

  M of the compound represented by the formula (1) is a hydrogen atom, an alkali metal atom, a 1/2 alkaline earth metal atom, ammonium, an organic ammonium, an amino acid, an amino acid alkali metal salt, taurine in the formula (1). N-methyltaurine, an alkali metal salt of taurine, or an alkali metal salt of N-methyltaurine.

  M is preferably an alkali metal such as sodium or potassium, an alkaline earth metal such as 1/2 calcium or 1/2 magnesium, an organic ammonium such as ammonium or triethanolammonium, a basic amino acid such as lysine or arginine, or glycine. Neutral amino acids such as sodium, glycine potassium, sarcosine sodium, β-alanine sodium, acidic amino acids such as disodium glutamate, dipotassium glutamate, disodium aspartate, taurine salts such as taurine sodium and taurine potassium, N-methyl taurine N-methyl taurine salts such as sodium and potassium N-methyl taurate, more preferably, alkali metal atoms such as sodium and potassium, and taurine salts such as sodium taurine and potassium taurine. .

(Component (b): Fatty acid salt)
Component (b) used in the present invention is an alkali metal salt of a fatty acid having 8 to 22 carbon atoms, an ammonium salt of a fatty acid having 8 to 22 carbon atoms, or an organic fatty acid having 8 to 22 carbon atoms. Ammonium salt.

  10-20 are preferable and, as for carbon number of this C8-C22 fatty acid, 12-18 are more preferable. Examples of the fatty acid having 8 to 22 carbon atoms include lauric acid, myristic acid, palmitic acid, isopalmitic acid, stearic acid, isostearic acid, oleic acid, and the like, and one or more of these are used. Can do. Moreover, the mixed fatty acid which is a mixture of fatty acids can be used, and examples thereof include coconut oil fatty acid, palm kernel oil fatty acid, and beef tallow fatty acid. Preferred are lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, coconut oil fatty acid, palm kernel oil fatty acid, and more preferred are lauric acid, myristic acid, palmitic acid, and stearic acid. Examples of the counter ion forming the salt include alkali metals such as sodium and potassium, organic ammonium such as monoethanolammonium, diethanolammonium, and triethanolammonium, or ammonium. Preferred are sodium, potassium and triethanolammonium, and more preferred is potassium.

(Component (c): Acylamino acid type anionic surfactant)
The acylamino acid type anionic surfactant is a surfactant having an amino acid salt structure having an N-acyl group. For example, N-acyl-N-methyl taurate, N-acyl glutamate, N-acyl-N-methyl-β-alanine, N-acyl-β-alanine, N-acyl sarcosine, N-acyl glycine Examples include salts. The acyl group is a group derived from a saturated or unsaturated fatty acid having 6 to 20 carbon atoms, such as a lauroyl group, a myristoyl group, a palmitoyl group, a stearoyl group, or an oleoyl group. In addition, an acyl group derived from a mixed fatty acid can be used, and examples of the acyl group derived from the mixed fatty acid include a coconut oil fatty acid acyl group and a palm kernel oil fatty acid acyl group. Preferred examples of the acyl group include lauroyl group, myristoyl group, coconut oil fatty acid acyl group, and palm kernel oil fatty acid acyl group. More preferred are a lauroyl group, a coconut oil fatty acid acyl group, and a palm kernel oil fatty acid acyl group.

  The counter ion forming the salt contained in the acylamino acid type anionic surfactant is hydrogen atom, alkali metal atom, 1/2 alkaline earth metal atom, ammonium, organic ammonium, amino acid, taurine salt, N-methyl taurine Indicates salt. Preferably, alkali metals such as sodium and potassium, alkaline earth metals such as 1/2 calcium and 1/2 magnesium, organic ammonium such as ammonium and triethanolammonium, basic amino acids such as lysine and arginine, glycine sodium and glycine Neutral amino acids such as potassium, sodium sarcosine, sodium β-alanine, acidic amino acids such as disodium glutamate, dipotassium glutamate and disodium aspartate, taurine salts such as taurine sodium and taurine potassium, N-methyl taurine sodium, N -N-methyl taurine salts such as methyl taurine potassium, more preferably, alkali metal atoms such as sodium and potassium, and taurine salts such as taurine sodium and taurine potassium.

  In the production of acylamino acid type anionic surfactants, secondary amine type amino acid derivatives having an alkyl group as a side chain are characterized by higher reactivity with an acyl group than those having no side chain. is there. Therefore, it can be industrially produced without requiring special equipment such as a pressure vessel. From the viewpoint of easy industrial production, the acylamino acid-based anionic surfactant is preferably N-acyl-N-methyltaurine salt, N-acyl-N-methyl-β-alanine salt, N- Acyl sarcosine salt. Among these, N-acyl-N-methyltaurine salt is more preferably N-acyl-N-methyltaurine salt because it can provide moist feeling after use of the detergent. These can be used alone or in combination.

  N-acyl-N-methyl taurine salts include coconut oil fatty acid methyl taurine sodium, coconut oil fatty acid methyl taurine sodium, coconut oil fatty acid methyl taurine triethanolammonium, lauroyl methyl taurine sodium, lauroyl methyl taurine taurine sodium, lauroyl methyl taurine Examples include triethanolammonium, palm kernel oil fatty acid methyl taurine sodium, palm kernel oil fatty acid methyl taurine sodium, palm kernel oil fatty acid methyl taurine triethanolammonium, and the like.

(Composition)
The skin cleanser composition of the present invention comprises a compound represented by formula (1) (referred to as component (a)), a fatty acid salt (referred to as component (b)), and an acylamino acid anionic surfactant (component (referred to as component (1)). c)).

That is, the skin cleanser composition comprises 0.01 to 5% by mass of the compound of formula (1) (component (a)), 5 to 30% by mass of fatty acid salt (component (b)), and acylamino acid anions. sex surfactant (component (c)) contains 1.0 to 2 0% by weight, is 1 / 2-20 / 1 (b) / (c) is a mass ratio, components (a), component ( b), the total of 10 to 5 0 wt% of component (c). These ratios are calculated with the sum of the ratios of (a), (b), (c) and the remaining water as 100% by mass.

  In the skin cleansing composition of the present invention, the content of component (a) is 0.01 to 5% by mass. The content of component (a) is preferably 0.02% by mass or more, and more preferably 0.03% by mass or more. The content of component (a) is preferably 3% by mass or less, and more preferably 2.5% by mass or less.

  In the hair cleansing composition of the present invention, the content of component (b) is 5 to 30% by mass. When the content of component (b) is less than 5% by mass, appropriate foaming and detergency cannot be obtained, and the basic performance of the detergent cannot be exhibited. From this viewpoint, the content of the component (b) is preferably 7% by mass or more, and more preferably 10% by mass or more. Moreover, when there is more content of a component (b) than 30 mass%, problems, such as precipitation of surfactant, may arise at low temperature. From this viewpoint, the content of the component (b) is preferably 25% by mass or less, and more preferably 20% by mass or less.

The content of the component (c) is 1.0 and 2 0% by weight. When the content of component (c) is less than 1.0% by mass, the irritation of the fatty acid salt cannot be alleviated. From this viewpoint, the content of the component (c) is preferably 2% by mass or more, and more preferably 3% by mass or more. Further, when the content of the component (c) is more than 20 % by mass, there is a possibility that problems such as precipitation of the surfactant occur at low temperatures.

The content ratio ((b) / (c)) of component (b) to component (c) in the skin cleansing composition is 1/2 to 20/1 in terms of mass ratio. When (b) / (c) is less than 1/2 , moderate foaming and a refreshing feeling peculiar to soap cannot be obtained. On the other hand, when (b) / (c) is larger than 20, fatty acid irritation cannot be alleviated. From this viewpoint, (b) / (c) is preferably 15/1 or less, and more preferably 10/1 or less.

(Other ingredients)
Other additive components can be appropriately blended with the cleaning composition of the present invention as long as the effects of the present invention are not impaired. The components used as such components can be exemplified as follows.

  For example, anionic surfactants such as polyoxyethylene (3) sodium lauryl ether sulfate, betaine-type amphoteric surfactants, imidazolinium betaine-type amphoteric surfactants, and sulfobetaine-type amphoteric surfactants. Agents, fatty acid alkanolamide type nonionic surfactants, amine oxide type nonionic surfactants, nonionic surfactants such as polyoxyethylene alkyl ether type nonionic surfactants, alkyltrimethylammonium chloride, chloride Cationic surfactants such as dialkyldimethylammonium, pearlescent agents such as ethylene glycol distearate and triethylene glycol distearate, 1,3-butylene glycol, propylene glycol, dipropylene glycol, glycerin, diglycerin , Moisturizers such as isoprene glycol and protein hydrolysates, oils such as squalane, jojoba oil, olive oil, castor oil, lanolin and lecithin, highly polymerized methylpolysiloxane, dimethylsiloxane methyl (polyoxyethylene) siloxane copolymer, etc. Silicone derivatives, antiseptics such as parabens, bactericides such as salicylic acid, isopropylmethylphenol, triclosan, zinc pyrithione, piroctone olamine, pH adjusters such as citric acid and sodium citrate, edetate, hydroxyethane diphosphonic acid And sequestering agents such as dibutylhydroxytoluene, tocopherol acetate, extracts extracted from animals and plants, pigments, fragrances, etc.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to these examples.

(Preparation Example 1: Production of thickener)
800 g (10.3 mol) of 40% methylamine aqueous solution and 509 g (3.4 mol) of sodium isethionate were charged in an autoclave with a capacity of 2 liters and reacted at 200-250 ° C. under a pressure of 20 kg / cm 2 for 5-7 hours. went. After cooling, excess methylamine was recovered by distillation and the residue was concentrated and evaporated to dryness. The reaction product was crystallized with 2500 g of a mixed solvent of dimethylformamide and water (mass ratio was dimethylformamide / water = 2/1) to obtain a compound of formula (1). The yield was 228g. In the obtained compound of formula (1), M is sodium.

(Examples 1-5 and Comparative Examples 1-5)
The following raw materials were used for the test.
(1) Potassium laurate: Nonsal LK-2 [manufactured by NOF Corporation]
(2) Potassium myristate: Non-Salle MK-1 [manufactured by NOF Corporation]
(3) Potassium palmitate: Nonsal PK-1 [manufactured by NOF Corporation]
(4) Potassium oleate: Nonsal OK-1 [manufactured by NOF Corporation]
(5) Palm oil fatty acid methyl taurine sodium: Diapon K-SF [manufactured by NOF Corporation]
(6) Lauroylmethylalanine sodium: Energy Coal L-30AN [manufactured by Lion Corporation]
(7) Palm oil fatty acid sodium glutamate: Amisoft LS-11 [Ajinomoto Co., Inc.]
(8) Xanthan gum: Xanthan clear 80 [manufactured by Danisco Japan]
(9) Hydroxyethyl cellulose: HEC Daicel SE900 [manufactured by Daicel FineChem]

  The compound of formula (1), fatty acid salt, acylamino acid type anionic surfactant, water and other components were mixed in the proportions shown in Tables 1 and 2, and the pH was adjusted to pH 8.8 using citric acid. . This mixture was used as a skin cleanser composition, and the moist feeling, slimy feeling, and viscosity change due to temperature were evaluated by the following methods.

(1) Moist feeling Each panel was composed of 10 men and women. The body was washed with 5 g of the skin cleansing composition, and the moist feeling after towel drying was evaluated. Two points were given for a moist feeling, 1 point was given for a slightly moist feeling, and 0 was given for a little moist feeling.
30 points or more in total: ◎
Total score 25 points or more and less than 30 points: ○
Total score 20 points or more and less than 25 points:
Total less than 20 points: ×

(2) Feeling slimy Ten men and women each were panelists, and the slimy feeling when the body was washed with 5 g of the skin cleansing composition was evaluated. From the total of 20 people, 2 points when you did not feel slimy, 1 point when you feel slightly slimy, and 0 points when you feel that you are feeling slimy and take time to rinse, It was evaluated in three stages.
30 points or more in total: ○
Total score 20 points or more and less than 30 points:
Total less than 20 points: ×

(3) Viscosity change due to temperature 50 g of the skin cleanser composition was allowed to stand in a thermostatic bath at 35 ° C. and 25 ° C. for 3 hours, and then a b-type viscometer (manufactured by Tokyo Keiki Seisakusho Co., Ltd.) was used for 100 seconds. The viscosity was measured at When the viscosity at 35 ° C. is expressed as viscosity (A) and the viscosity at 25 ° C. is expressed as viscosity (B), the viscosity ratio (viscosity (A) / viscosity (B)) was evaluated in the following three stages.
Viscosity (A) / Viscosity (B) 0.85 or more: ○
Viscosity (A) / Viscosity (B) 0.80 or more and less than 0.85: Δ
Viscosity (A) / Viscosity (B) Less than 0.80: ×

  Tables 1 and 2 show the evaluation results of moist feeling, (2) sliminess, and (2) viscosity change with temperature.

  As a skin cleanser composition not containing the compound of formula (1), 1 g of potassium laurate, 15 g of potassium myristate, 6 g of potassium palmitate, 2 g of coconut oil fatty acid methyl taurine sodium and 76 g of water are placed in a 200 ml glass container. After stirring at 50 ° C. for 30 minutes, the pH was adjusted to pH 8.8 using citric acid. As a result of 50 g of this skin cleanser composition being left to stand in a thermostatic bath at 25 ° C. for 3 hours, and then measuring the viscosity at a time of 100 seconds using a B-type viscometer (manufactured by Tokyo Keiki Seisakusho Co., Ltd.), The viscosity was 320 mPa · s. The viscosity at 25 ° C. of Example 1 was 609 mPa · s, and Example 1 containing the component (a) had a higher viscosity than that.

Examples 1, 2, and 3 satisfied all the problems of the present invention.
In contrast to Example 1, Comparative Example 1 containing xanthan gum instead of component (a) is poor in moist feeling, feels slimy, has a large viscosity change due to temperature, and does not satisfy the problems of the present invention. It was a thing.
In contrast to Example 1, Comparative Example 2 containing hydroxyethyl cellulose instead of component (a) is poor in moist feeling, feels slimy, has a large viscosity change due to temperature, and does not satisfy the problems of the present invention. It was a composition.
Compared to Example 1, the mass ratio (b) / (c) of component (b) to component (c) is less than 1/5, and Comparative Example 3 containing hydroxyethyl cellulose instead of component (a) Although a moist feeling was obtained, it was a skin cleansing composition that did not satisfy the problems of the present invention because it felt slimy during use, had a large viscosity change due to temperature.

  Example 4 did not give a slimy feeling during use, gave a moist feeling after use, and had a small change in viscosity due to temperature, satisfying all the problems of the present invention. In contrast to Example 4, Comparative Example 4 containing xanthan gum instead of component (a) is poor in moist feeling, feels slimy, has a large viscosity change due to temperature, and does not satisfy the problems of the present invention. It was a thing.

Example 5 did not give a slimy feeling during use, gave a moist feeling after use, and had a small change in viscosity due to temperature, satisfying all the problems of the present invention.
Compared to Example 5, Comparative Example 5 containing hydroxyethyl cellulose instead of component (a) has a moist feeling, a slimy feeling, a large viscosity change due to temperature, and does not satisfy the problems of the present invention. It was an agent composition.

Claims (2)

It contains the following component (a), component (b), component (c), the ratio of the component (a) is 0.01 to 5% by mass, the ratio of the component (b) is 5 to 30% by mass, The ratio of the component (c) is 1.0 to 20% by mass, and the mass ratio ((b) / (c)) of the component (b) to the component (c) is 1/2 to 20/1. A skin cleanser composition, wherein the total ratio of the component (a), the component (b) and the component (c) is 10 to 50% by mass, and the balance is water.

(A) Compound (b) represented by the following formula (1) Alkali metal salt, ammonium salt or organic ammonium salt of fatty acid having 8 to 22 carbon atoms (c) Acylamino acid-based anionic surfactant

(In the formula (1), M is a hydrogen atom, an alkali metal atom, a 1/2 alkaline earth metal atom, ammonium, an organic ammonium, an amino acid, an amino acid alkali metal salt, taurine, N-methyltaurine, or an alkali metal salt of taurine. Or an alkali metal salt of N-methyltaurine.)   2. The skin cleanser composition according to claim 1, wherein the component (c) is an acylmethyl taurate salt.