JPH0517342A - Skin cleanser - Google Patents

Abstract

(57) [Summary] [Purpose] An object of the present invention is to provide a skin cleansing agent which does not become sticky during washing, does not become dry after drying, has an appropriate viscosity, and is excellent in stability. [Structure] The skin cleansing agent of the present invention is characterized by containing an anionic surfactant, an amphoteric surfactant and / or a semipolar surfactant, and a higher fatty acid.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a skin cleanser containing an anionic surfactant, an amphoteric surfactant and / or a semipolar surfactant, and a higher fatty acid. More particularly, the present invention relates to a skin cleansing agent which does not become sticky during washing, does not clog the skin after drying, has an appropriate viscosity, and has excellent stability.

[0002]

2. Description of the Related Art Conventionally, soap has been the main component of skin cleansing agents such as body shampoos and facial cleansers. However, in recent years, it has been pointed out that the irritation of soap to the skin has come to be used, and for example, biologically related anionic surfactants such as alkyloylalkyl taurine salts, which are considered to be highly safe, have come to be used. . However, if such an anionic surfactant alone is used, there is a problem such as "dripping" that occurs because it cannot give viscosity, and it is common to use an amphoteric surfactant in combination. In fact, it is known that the combined use of an amphoteric surfactant imparts viscosity to the system. However, this product has a drawback that the skin feels sticky during washing and becomes dry after drying as a feeling of use of the skin cleansing agent.

On the other hand, the inventors of the present invention have studied the improvement of usability by adding various additive components to this system, and as a result, the oil composition eliminates stickiness during washing and gives dryness after drying. I found that there is no. However, when oil is added to a combination system of an anionic surfactant and an amphoteric surfactant, there is a drawback that the viscosity is remarkably lowered or the stability such as separation is remarkably deteriorated. Therefore, it is the present situation that a skin cleansing agent which is not sticky during washing, does not get dry after drying, has an appropriate viscosity, and is excellent in stability has not yet been obtained.

[0004]

DISCLOSURE OF THE INVENTION In view of the above-mentioned circumstances, the present inventors have conducted further intensive research, and as a result, an anionic surfactant, an amphoteric surfactant and / or a semipolar surfactant, In the case of combining with a higher fatty acid, it was found that the skin does not become sticky during washing, the skin does not become bulky after drying, and that a skin cleansing agent having an appropriate viscosity and excellent stability can be obtained, thereby completing the present invention. I arrived.

[0005]

That is, claim (1) of the present invention includes (I) one or more anionic surfactants, and (II) an amphoteric surfactant and a semipolar surfactant. One or more selected from the group consisting of
I) One or more higher fatty acids represented by the following general formula R1COOH (wherein R1 is a saturated or unsaturated hydrocarbon having an average carbon number of 7 to 25 and having a linear or branched chain or a hydroxyl group). It is a skin cleansing agent characterized by containing and.

Further, claim (2) of the present invention is a kind selected from the group consisting of higher fatty acid, anionic surfactant + amphoteric surfactant and semipolar surfactant in claim (1). Or weight ratio (III) / of two or more kinds
A skin cleansing agent having (I) + (II) of 0.002-1.

Further, claim (3) of the present invention is the one or two kinds selected from the group consisting of an anionic surfactant, an amphoteric surfactant and a semipolar surfactant in claim (1). 5 to 50% by weight of the total amount (I) + (II) and 0.1 to 5% by weight of the higher fatty acid (III)
Is a skin cleanser.

The structure of the present invention will be described in detail below.

Examples of the anionic surfactant used in the present invention include polyoxyalkylene alkyl ether sulfate ester salt, alkyloylalkyl taurine salt, phosphate ester type, N-acyl amino acid salt and the like. Of these, those having an alkyloylalkyl taurine salt are particularly preferable because they are extremely safe.

Polyoxyalkylene alkyl ether sulfate ester salt has the following general formula

[Chemical 1] (In the formula, R2 is an alkyl group having 8 to 16 carbon atoms, R3 is H or CH3, and m is an average addition mole number of alkylene oxide of 1 to
6, M represents an alkali metal, ammonium or an organic amine. ), This surfactant has 8 to 16 carbon atoms.
In the presence of an alkali catalyst, an average of 1 to 6 mol of ethylene oxide or propylene oxide is added to the aliphatic saturated alcohol of 1 to prepare a polyoxyalkylene alkyl ether, which is then prepared by a conventional method using chlorosulfonic acid or sulfuric anhydride. It can be produced by sulfating at 1, followed by neutralization with an alkali metal hydroxide, ammonia or an organic amine.

The polyoxyalkylene alkyl ether sulfuric acid ester salt suitable for the present invention is a sulfuric acid ester salt of an alkyl ether obtained by adding an average of 3 moles of ethylene oxide to natural lauryl alcohol, C12 to C13 obtained by oxo synthesis. Examples thereof include sulfuric acid ester salts of alkyl ether obtained by adding 2 mol of ethylene oxide to the aliphatic saturated alcohol on average.

Alkyloylalkyl taurine salt type anionic surfactants have the general formula

[Chemical 2] (In the formula, R4 represents an alkyl group, an alkenyl group or a hydroxyalkyl group having an average carbon number of 7 to 19, R5 represents a lower alkyl group having an average carbon number of 1 to 3, and M represents an alkali metal or an organic amine. ), For example, as an alkyloyl group RCO-, a cocoyl group from lauroyl, palmitoyl, stearoyl, oleoyl, and coconut fatty acid (where R has 7 to 7 carbon atoms).
Alkyloyl groups distributed among 17), methyl, ethyl, and propyl groups as the alkyl group R, and lithium, potassium, sodium, triethanolamine, diethanolamine, monoethanolamine, and the like as counterions. Can be mentioned.

Specific examples of the phosphoric acid ester type anionic surfactant include oleyl phosphoric acid and its triethanolamine salt, polyoxyethylene (3 mol addition) isostearyl phosphoric acid and its sodium salt, and coconut fatty acid monoethanol. Amidoethyl polyoxyethylenyl (2 mol addition) phosphoric acid and its sodium salt, polyoxyethylene (3 mol addition) lauryl phosphoric acid and its sodium salt, polyoxypropylene (2 mol addition) lauryl phosphoric acid and its triethanolamine Salt, polyoxyethylene
(2 mol addition) polyoxypropylene (2 mol addition) lauryl phosphoric acid and its sodium salt, di [polyoxyethylene (3 mol addition) lauryl] phosphoric acid and its triethanolamine salt, etc. are mentioned.

The acyl salt of the N-acyl amino acid salt includes lauroyl, myristoyl, palmitoyl groups and the like, the amino acids include glutamic acid, glycine, β-alanine and the like, and the salts of these N-acyl amino acids include sodium, It is each salt of lithium, monoethanolamine, diethanolamine and the like. Incidentally, N-acyl-N
-Alkyl amino acid salts can also be included in the N-acyl amino acid salts of the present invention. In this case, the alkyl group is a methyl, ethyl, propyl, isopropyl group or the like. Preferred N-acyl amino acid salts include N-acyl amino acid salts such as N-lauroyl glutamic acid, N-myristoyl glutamic acid, N-myristoyl-β-alanine, N-palmitoyl-β-alanine, and N-lauroyl-
Sodium of N-acyl-N-alkyl amino acids such as N-isopropylglycine, N-lauroylsarcosine, N-myristoylsarcosine, N-palmitoylsarcosine, N-lauroyl-N-methyl-β-alanine,
Examples include salts of lithium, monoethanolamine, diethanolamine and the like.

As the amphoteric surfactant or semipolar surfactant used in the present invention, all the amphoteric surfactants or semipolar surfactants used for ordinary cosmetic bases can be applied. To give a specific example,

[0016]

[Chemical 3] Amidobetaine-type amphoteric surfactant represented by [as commercial products Levon 2000 (Sanyo Kasei), Anon BDF (NOF Corporation)
Etc.] or

[0017]

[Chemical 4] Amidosulfobetaine-type amphoteric surfactants represented by [Lonzain-CS (Lonza), Miratain
CBS (Milan), etc.] or

[0018]

[Chemical 5] Betaine-type amphoteric surfactant represented by [commercially available Anon BL (NOF Corporation), Dehainton AB-30 (Henkel)]
Etc.] or

[0019]

[Chemical 6] Sulfobetaine-type amphoteric surfactant represented by [Lonzain 12CS (Lonza), etc. as a commercial product] or

[0020]

[Chemical 7] Imidazolinium-type amphoteric surfactant represented by [Obazoline 662-N (Toho Kagaku) and Suwanol AM-10 as commercial products]
1, Suwanor AM-102EX (Nikko Chemicals), Anon GLM
(Nippon Yushi) and the like are applicable].

Further, as the semipolar surfactant, a general formula

[Chemical 8] A tertiary amine oxide type semipolar surfactant represented by the formula [Unisafe A-LM (NOF Corporation), Wandamine OX-100 (Nippon Rika Co., Ltd., etc. are commercially available products)] is exemplified.

(In the above general formula, R6 is 9 carbon atoms on average.
To 17 are alkyl or alkenyl groups, and R7 is an alkyl or alkenyl group having an average number of carbon atoms of 10 to 18. x is an integer of 2 to 4, y is an integer of 0 to 3, and z is an integer of 1 or 2. In the present invention, any one or more of these amphoteric surfactants or semipolar surfactants are selected and used.

The total amount (I) + (II) of the anionic surfactant of the present invention and one or more selected from the group consisting of amphoteric surfactants and semipolar surfactants is the skin. It is 5 to 50% by weight, preferably 8 to 30% by weight, based on the total amount of the cleaning agent. When the blending amount is less than 5% by weight, an adequate viscosity cannot be obtained because the surfactant is insufficient, and when the blending amount exceeds 50% by weight, the liquid stability is impaired and turbidity or separation occurs, which is preferable. Absent.

As the higher fatty acid used in the present invention, all the higher fatty acids used in ordinary cosmetic bases and the like can be applied. Specific examples include saturated fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid and behenic acid; 2-palmitoleic acid,
Unsaturated fatty acids such as petroselinic acid, oleic acid, elaidic acid, ricinoleic acid, linoleic acid, linoelaidic acid, linolenic acid, and arachidonic acid; branched fatty acids such as isostearic acid; and hydroxycarboxylic acids such as 12-hydroxystearic acid. To be In the present invention, any one or more of these higher fatty acids are selected and used. Among the above-mentioned fatty acids, unsaturated fatty acids such as oleic acid are remarkably excellent in stability, especially at low temperatures, and thus can be used in cold regions.

The weight ratio (III) / of the higher fatty acid of the present invention and one or more selected from the group consisting of anionic surfactant + amphoteric surfactant and semipolar surfactant.
(I) + (II) is in the range of 0.002 to 1, preferably 0.05.
It is in the range of to 0.5. In this composition, the above weight ratio is
When it is less than 0.002, the skin becomes sticky during washing and after drying, it is not possible to obtain an appropriate viscosity, and when it exceeds 1, the solution stability is impaired and turbidity and separation occur, which is not preferable.

In the present invention, in addition to the above essential components, other commonly used components and additives can be added. That is, oils such as higher alcohols, silicone oils, liquid paraffin and ester oils, water-soluble polymers such as methyl cellulose and hydroxymethyl cellulose, cation-modified cellulose ether derivatives [Polymer JR
(Union Carbide Corporation), polyglycol / polyamine condensate [Polycoat H (Henkel Hakusui)], polydimethyldiallylammonium halide [Mercoat 100 (Merck)], copolymer of dimethyldiallylammonium halide and acrylamide. [Cationic polymers such as Marquat 550 (manufactured by Merck), polyoxyethylene hydrogenated castor oil, nonionic surfactants such as polyoxyethylene alkyl ether, raster agents such as ethylene glycol distearate, natural extracts of animals and plants, and the like. Derivatives, organic acids such as citric acid and lactic acid, inorganic salts such as sodium chloride, fragrances, coloring agents, preservatives,
A chelating agent, an ultraviolet absorber and the like can be appropriately added within a range that does not impair the effects of the present invention. Furthermore, the incorporation of a moisturizing agent such as 1,3-butylene glycol or dipropylene glycol is preferable because it improves the stability of the system at high temperatures.

[0027]

Industrial Applicability The present invention is a skin cleansing agent which is not sticky to the skin during washing, does not become bulky after drying, has an appropriate viscosity, and is excellent in stability.

[0028]

The present invention will be described in more detail with reference to examples. The present invention is not limited to this. The blending amount is% by weight. The effects were measured by the following test methods and evaluation methods.

(1) "Stickiness" evaluation method The body was washed with 10 g of the prepared skin cleanser, and the "stickiness" during washing was judged by the touch of 10 testers. If there is not, △,
If there was "stickiness", it was evaluated as x.

(2) Evaluation of "Crustiness" The body was washed with 10 g of the prepared skin cleanser, and the "Crustiness" after drying was judged by the touch of 10 testers. △, if there is no "bulkness"
If there was "kasatsuki", it was evaluated as x.

(3) Viscosity Evaluation Method Using a B type viscometer, evaluation was performed as follows. (3
0 ° C) ○ ・ ・ ・ Viscosity is 500cps or more △ ・ ・ ・ Viscosity is 100cps or more and less than 500cps × ・ ・ ・ Viscosity is less than 100cps

(4) Stability Evaluation Method The state of the prepared cleaning composition after being left at room temperature for one month was visually evaluated as follows. ◯: Transparent and uniform Δ: Turbidity ×: Separation Especially, among ◯, those having good low temperature stability (evaluated after standing at 0 ° C. for 1 month) were marked with ◎.

Examples 1 to 16 and Comparative Examples 1 to 22 The skin cleansing agents shown in Tables 1 to 4 were prepared, and were made "sticky".
"Crustiness", viscosity, and stability were evaluated.

[Table 1]

[0034]

[Table 2]

[0035]

[Table 3]

[0036]

[Table 4]

As is clear from Tables 1 to 4, the skin cleansing agent of the present invention is not sticky during washing, does not dry after drying, has an appropriate viscosity, is excellent in stability, and has low skin irritation. Met.

Example 17 Body Shampoo A body shampoo having the following composition was prepared by a conventional method. Polyoxyethylene (2 mol addition) Alkyl (12,13) ether Sulfate triethanolamine 15 Ovazoline 662N (30% by weight aqueous solution) 17 Palm fatty acid amide propyldimethylaminoacetic acid betaine 1 Erucic acid 2 Palm fatty acid diethanolamide 2 1,3- Butylene glycol 2 Fragrance Amount of deionized water Residual

Example 18 Transparent gel-like facial cleanser A transparent gel-like skin cleansing agent having the following composition was prepared by a conventional method. Polyoxyethylene (2 mol addition) Alkyl (12,13) ether Sodium sulfate 16 Lauryl dimethylamino amino acid betaine 4 Oleic acid 1 Dipropylene glycol 2 Fragrance Ion exchange water Residual

Example 19 Body Shampoo A body shampoo having the following composition was prepared by a conventional method. Myristoyl Methyl Taurine-K 15 Palm Fatty Acid Amidopropyl Dimethyl 5 Amino Acetic Acid Betaine Erucic Acid 2 1,3-Butylene Glycol 2 Fragrance Amount of Ion Exchange Water

Example 20 Transparent gel-like facial cleanser A transparent gel-like skin cleansing agent having the following composition was prepared by a conventional method. Lauroyl methyl taurine-Na 8 Obazoline 667-N (30% by weight aqueous solution) 67 Oleic acid 2 Glycerin 1 Perfume Ion-exchanged water Residual

Example 21 Body Shampoo A body shampoo having the following composition was prepared by a conventional method. Polyoxyethylene (2 mol addition) Sodium lauryl phosphate 15 Obazoline 662N (30% by weight aqueous solution) 17 Palm fatty acid amide propyldimethylaminoacetic acid betaine 1 Erucic acid 2 Palm fatty acid diethanolamide 2 1,3-butylene glycol 2 Fragrance Ion exchange Water residue

Example 22 Transparent gel-like facial cleanser A transparent gel-like skin cleansing agent having the following composition was prepared by a conventional method. Polyoxyethylene (2 mol addition) Sodium lauryl phosphate 8 Lauryl dimethylamino acetic acid betaine 4 Oleic acid 1 Dipropylene glycol 2 Perfume Ion-exchanged water Residual

Example 23 Body Shampoo A body shampoo having the following composition was prepared by a conventional method. N-lauroyl-N-methyl-β-alanine sodium 10 N-palmitoylglutamate potassium 5 Ovazoline 662N (30 wt% aqueous solution) 17 Palm fatty acid amidopropyl dimethylaminoacetate betaine 1 Erucic acid 2 Palm fatty acid diethanolamide 2 1,3-butylene Glycol 2 Fragrance, appropriate amount of ion-exchanged water, residual

Example 24 Transparent gel-like facial cleanser A transparent gel-like skin cleansing agent having the following composition was prepared by a conventional method. N-lauroyl sarcosine triethanolamine 5 lauryl dimethylamino acetic acid betaine 4 oleic acid 1 dipropylene glycol 2 perfume proper amount ion-exchanged water residual

The skin cleansers of Examples 17 to 24 are skin cleansers that do not become sticky during washing, do not dry after drying, have an appropriate viscosity, and are excellent in stability. Excellent stability, 0 ℃ 0 ℃ after left for 1 month
The condition at was also very good.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display part // (C11D 1/83 1:75 1:29) (31) Priority claim number Japanese Patent Application No. 2 −259875 (32) Priority Day 2 (1990) September 28 (33) Priority claiming country Japan (JP)

Claims (3)

[Claims] 1. An (I) one or more anionic surfactants, and one or more selected from the group consisting of (II) an amphoteric surfactant and a semipolar surfactant, and (II)
I) One or more higher fatty acids represented by the following general formula R1COOH (wherein R1 is a saturated or unsaturated hydrocarbon having an average carbon number of 7 to 25 and having a linear or branched chain or a hydroxyl group). A skin cleansing agent comprising: 2. The weight ratio (III) of higher fatty acid to one or more selected from the group consisting of anionic surfactant + amphoteric surfactant and semipolar surfactant. ) / (I) + (II) is 0.002-1. 3. The total blending amount (I) + of claim 1, wherein the anionic surfactant and one or more selected from the group consisting of an amphoteric surfactant and a semipolar surfactant.
5 to 50% by weight of (II), and blending amount of higher fatty acid (II
A skin cleansing agent in which I) is 0.1 to 5% by weight.