JPH07252133A - Skin cleaning agent - Google Patents

Abstract

PURPOSE:To obtain a skin cleaning agent generating uniform and creamy foam, having excellent cleaning power and massaging properties. CONSTITUTION:This skin cleaning agent is obtained by packing a cleaning solution containing 5-30wt.% of a higher fatty acid salt to a foam delivery container having plural porous membranes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin cleansing agent which is filled in a specific container, has excellent detergency and massage properties, has good washing properties, is less likely to cause skin irritation, and has excellent environmental compatibility. .

[0002]

2. Description of the Related Art Conventionally, oily and water-based skin cleansing agents, especially facial cleansing agents, have been known. Among them, the oily ones are classified into oily ones in a narrow sense consisting only of oils, emulsifying ones containing water and relatively large amounts of oils, liquid crystal or gel-like ones containing a surfactant and a polyol, and the like. . The higher the oil content of these, the better the oily make-up removal, but there is a problem that the oily feeling remains after use.

On the other hand, an aqueous cleansing agent is usually a surfactant dissolved or suspended in an aqueous medium and gives a refreshing feeling after rinsing with water. However, the effect of removing the oily makeup cosmetics is not sufficient. Further, since a surfactant having a relatively high concentration is used, if the rinse is insufficient, there is a concern that skin irritation such as rough skin may occur. Furthermore, since the surfactant is diluted with water and the foaming operation is simultaneously performed on the skin, it is difficult to perform the cleansing operation with good reproducibility while keeping a constant surfactant concentration for a long time.

On the other hand, a foaming cleaning agent has been developed which is discharged from a foam discharging container and foamed to be used.
It is used for applications such as washing hair. This foam dispenser
Various improvements have been made so as to discharge a stable foam. For example, a cleaning agent is mixed with air and passed through a foam generating means such as a porous body to be discharged as a foam (Japanese Patent Publication No. 52-16567). No. publication) is known. Further, a foaming detergent containing a surfactant, a monohydric alcohol and a polyhydric alcohol, which produces fine bubbles when used in a foam discharge container (JP-A-5-132700).
Is also being developed. Furthermore, as a method of suppressing skin irritation and cleansing the skin with good reproducibility, a method of using a so-called foamer container with a relatively low concentration of a hypoallergenic surfactant and using it in combination with a water-soluble polymer has been proposed. (WO91 / 14759).

However, in the case of using the conventional foam discharge container and the foaming cleaning agent, only large and small foams are obtained,
It had the drawbacks of a slight discomfort and poor cleaning power and massage. That is, when foamed, the frequency of contact between the surfactant and the skin was low, and sufficient detergency and massage properties could not be obtained.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a skin cleansing agent in which bubbles discharged from a container are uniform and creamy, and are stable, and have excellent detergency and massaging property, and further less skin irritation. To provide.

[0007]

Under such circumstances, as a result of intensive studies by the present inventors, as a result of filling the specific liquid with a cleaning solution containing a higher fatty acid salt, a skin cleansing agent that solves the above problems. The inventors have found that the following can be obtained and completed the present invention.

That is, according to the present invention, a higher fatty acid salt is added to
A skin cleansing agent comprising a foam discharge container having a plurality of porous membranes filled with a cleaning liquid containing 30% by weight.

The higher fatty acid salt used in the present invention may be saturated or unsaturated and has 8 carbon atoms.
-22, especially 10-18 are preferable. Specific examples of preferable ones include lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, hydroxydecenoic acid, coconut oil fatty acid, reduced coconut oil fatty acid, beef tallow fatty acid, reduced beef tallow fatty acid, and palm kernel fatty acid. Alkali metal salts such as sodium and potassium, ammonium salts, monoethanolamine salts, diethanolamine salts, triethanolamine salts, 2-amino-2-methylpropanol, alkanolamine salts such as 2-amino-2-methylpropanediol, lysine , Basic amino acid salts such as arginine, and the like. Of these, triethanolamine laurate, potassium laurate, triethanolamine myristate, triethanolamine stearate, and coconut oil fatty acid potassium are particularly preferable.

Further, these higher fatty acid salts do not necessarily have to be added as a fatty acid salt to the cleaning liquid, and the higher fatty acid and the base may be added separately to form a fatty acid salt in the composition.

These higher fatty acid salts may be used either individually or in combination of two or more, and may have 5 to 3 parts in the total composition.
0% by weight (hereinafter referred to simply as%), preferably 5 to 20
%, Particularly preferably 5 to 15%. If it is less than 5%, sufficient detergency cannot be obtained, and if it exceeds 30%, skin irritation occurs, which is not preferable. As the pH of the skin cleanser,
7-11, especially 7.5-9.5 are preferable. Within this range, there is little skin irritation, and the foam after discharging from the container is stable, which is preferable.

In addition to the above higher fatty acid salts, the skin cleansing agent of the present invention may also contain other anion, amphoteric and nonionic surfactants which are usually used in cleansing agents, within a range that does not impair the effects of the present invention. It is possible to The following are mentioned as a specific example of these surfactants.

(1) A linear or branched alkylbenzene sulfonate having an alkyl group having an average carbon number of 10 to 16. (2) Having a linear or branched alkyl group or alkenyl group having an average carbon number of 10 to 20 and having an average of 0.5 to 10 in one molecule.
8 mol of ethylene oxide, propylene oxide,
Butylene oxide, ethylene oxide and propylene oxide in the ratio of 0.1 / 9.9 to 9.9 / 0.1,
Alternatively, an alkyl or alkenyl ether sulfate in which ethylene oxide and butylene oxide are added at a ratio of 0.1 / 9.9 to 9.9 / 0.1. (3) An alkyl or alkenyl sulfate having an alkyl group or an alkenyl group having an average carbon number of 10 to 20. (4) An olefin sulfonate having an average of 10 to 20 carbon atoms in one molecule. (5) An alkane sulfonate having an average of 10 to 20 carbon atoms in one molecule.

(6) It has an alkyl group or an alkenyl group having an average carbon number of 10 to 20, and an average of 0.5 to 8 moles of ethylene oxide, propylene oxide, butylene oxide, ethylene oxide and propylene oxide per molecule is 0. 0.1 / 9.9 to 9.9 / 0.1 or ethylene oxide and butylene oxide are 0.1.
Alkyl or alkenyl ether carboxylates added at a ratio of /9.9 to 9.9 / 0.1. (7) An α-sulfofatty acid salt or ester having an alkyl group or an alkenyl group having an average carbon number of 10 to 20. (8) An N-acyl amino acid type surfactant having an acyl group having 8 to 24 carbon atoms and a free carboxylic acid residue. (9) A sulfosuccinate such as a higher alcohol having 8 to 22 carbon atoms or its ethoxylate, or a sulfosuccinate derived from a higher fatty acid amide.

As the counterion of the anionic residue of these surfactants, alkali metal ions such as sodium and potassium, alkaline earth metal ions such as calcium and magnesium, ammonium ion, and alkanol groups having 2 or 3 carbon atoms. 1 to 3 alkanolamines (eg monoethanolamine, diethanolamine, triethanolamine, triisopropanolamine, etc.)
Can be mentioned. Examples of the counter ion of the cationic residue include halogen ions such as chlorine, bromine and iodine, and methosulfate and saccharinate ions.

(10) An α-addition type secondary amide or tertiary amide type imidazoline-based amphoteric surfactant having an alkyl group, an alkenyl group or an acyl group having 8 to 24 carbon atoms. (11) Carbobetaine-based, amidobetaine-based, sulfobetaine-based, hydroxysulfobetaine-based having an alkyl group, an alkenyl group, or an acyl group having 8 to 24 carbon atoms,
Alternatively, an amidosulfobetaine-based amphoteric surfactant. (12) A fatty acid amide derivative having an alkyl group having 8 to 20 carbon atoms represented by the following formula.

[0017]

[Chemical 1]

[In the formula, R ¹ represents an alkyl group having 8 to 20 carbon atoms, R ² and R ³ are the same or different and each represents a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or an alkyl group having 1 to 3 carbon atoms. hydroxyalkyl group or a _{- (C 2 H 4 O)} l H group (l represents a number from 2 to 4) shows a]

(14) An alkyl saccharide-based surfactant represented by the following formula. R ⁴ -O- (R ⁵ O) _m -G _n [In the formula, R ⁴ represents a linear or branched alkyl group having 8 to 18 carbon atoms, an alkenyl group, or an alkylphenyl group,
R ⁵ represents an alkylene group having 2 to 4 carbon atoms, and m is 0 to 1
0 represents the number, G represents a reducing sugar having 5 to 6 carbon atoms, and n represents the number from 1 to 10]

Of these surfactants, alkyl ether sulfates, betaine amphoteric surfactants, and alkyl saccharide surfactants are particularly preferable.

The skin cleansing agent of the present invention contains, in addition to the above-mentioned surfactants, components used in ordinary cleansing compositions such as oils, humectants, polymer compounds, preservatives, chelating agents and drugs. , Dyes, fragrances, antioxidants, pH adjusters, viscosity adjustors and the like can be appropriately added within a range that does not impair the effects of the present invention.

The cleaning liquid can be produced by mixing the above-mentioned components and following a conventional method. Further, in order to discharge good bubbles from the container, this cleaning liquid preferably has a viscosity of 30 cps or less, particularly 1 to 15 cps when measured with a B-type viscometer (manufactured by Tokyo Keiki Co., Ltd.) at 25 ° C. ,
It can be adjusted by appropriately selecting the compounding ingredients. If the viscosity of the cleaning liquid exceeds 30 cps, the cleaning liquid remaining after use solidifies on the film, and bubbles tend to be difficult to discharge.

The cleaning liquid thus obtained is filled in a foam discharge container having a plurality of porous membranes. Examples of the porous film include sponges, sintered bodies, nets, and the like. Of these porous membranes, the cleaning liquid remaining on the membrane is clogged by drying and solidification, and by the flow of bubbles at the time of the next discharge, it is possible to immediately dissolve the solidified matter and eliminate the clogging. A net that is thin is preferred. The net is preferably from 50 to 500 mesh, and particularly preferably from 100 to 300 mesh because it has excellent massage properties and produces creamy foam. Further, preferable materials for such a mesh include nylon and polyester.

It is necessary for the container to have a plurality of such membranes, and it is preferable to have two such membranes, particularly from the viewpoints of economy, foam stability and the like. Good bubbles cannot be obtained with one sheet.
The foam discharge container may be any as long as it mixes a fixed amount of cleaning liquid with a fixed amount of air and discharges it as a foam, for example, a squeeze used by pressing the body of a soft container with fingers. For example, a pump former used by pressing the head of a cap equipped with a former and a pump mechanism with fingers.

The preferred container used in the present invention is, for example, the one shown in FIG.

In FIG. 1, a foam discharge container 10 has a cap 1 at an opening 11A of a container body 11 having a squeeze property.
2 is screwed, and the gas-liquid mixing section 13 is provided at the central position inside the cap 12. The gas-liquid mixing section 13 includes a tube connecting section 13A and a porous film 13B. Also,
In the foam discharge container 10, the dip tube 14 is fitted into the tube connecting portion 13A of the gas-liquid mixing portion 13 with a certain gap, and is supported by the cap 12 in a state of communicating with the gas-liquid mixing portion 13 and the dip tube is attached. Tube 14 to container body 1
It is inserted in 1.

The foam discharge container 10 is provided with a cap 12
An openable and closable nozzle portion 15 is screwed to the discharge side (upper side in the drawing) of the gas-liquid mixing portion 13. The nozzle part 15 is rotated by 90 degrees with respect to the cap 12 and is set to be switched between a closed position and an open position. At the closed position, the annular seal ring part 16 of the nozzle part 15 is positioned above the gas-liquid mixing part 13. The sealing ring portion 16 is separated from the plug portion 17 at the open position to form a discharge passage. The discharge port 18 of the nozzle portion 15 is provided with a porous film fixing tool 18A and a porous film 18B at its tip, and the porous film 18B is fitted and fixed by the porous film fixing tool 18A.

Further, the foam discharge container 10 is provided with a ball valve 22 in the air return passage 21 of the cap 12. The ball valve 22 has a seal portion 2 above the air return passage 21 when bubbles are discharged.
The pressure inside the container body 11 due to the squeeze is increased by closely contacting with 1A. After the bubbles have been discharged, the ball valve 22 is locked to the projection 21B below the air return path 21 to remove external air by the negative pressure inside the container caused by the container restoring force of the container body 11 from which the squeeze has been removed. It is introduced into the container body 11.

The bubble discharge container 10 discharges bubbles by the following operation. (1) By rotating the nozzle unit 15, the nozzle unit 15
The seal ring portion 16 is separated from the plug portion 17 of the cap 12 to form the bubble discharge path indicated by the arrow A in FIG. (2) By manually squeezing the container body 11, air (or liquid) directly introduced into the gas-liquid mixing section 13 of the cap 12 and the air (or liquid) introduced into the gas-liquid mixing section 13 via the dip tube 14. By mixing with the liquid (or air), bubbles that pass through the porous film 13B are formed, and the bubbles pass through the above-described bubble discharge path A and then the porous film 18B provided at the tip of the discharge port 18 of the nozzle portion 15. Through the discharge port 18. At this time, the ball valve 22 moves the air return path 21.
The pressure in the container body 11 is increased by closely contacting the seal portion 21A.

(3) After the bubbles are discharged, the ball valve 22 is locked to the protrusion 21B of the air return path 21, and the negative pressure inside the container due to the container restoring force of the container body 11 from which the squeeze has been removed causes external air to flow. Is introduced into the container body 11 from the air return path indicated by arrow B in FIG. At this time, the external air also tries to pass through the route opposite to the bubble discharge route A described in (2) above.
The residual bubbles of the porous film 13B become a resistance, and therefore pass through the air return path B described above. Further, when the residual bubbles of the porous film 18B become a resistance and the air introduction to the air return passage B is gentle, the air return passage 21 and the ball valve 22 are directly attached to the outside of the cap 12 instead of the foam discharge container. You may use the foam discharge container provided in the position which communicates.

In the skin cleansing agent of the present invention, foam is generated when the cleansing solution passes through the membrane, and the foam density of the foam generated is 0.03 to 0.25 g / ml, particularly 0.06 to 0.15.
It is preferably g / ml. A foam density within this range is particularly preferable because it has excellent detergency and massage properties.
The foam density can be determined by discharging foam from a former into a 100 ml graduated cylinder and measuring the weight.

The skin cleansing agent of the present invention can be used as a facial cleansing foam, a cleansing foam, a shaving foam, a body foam, a hair foam and the like. Since it has particularly excellent massage properties, it is preferably used as a cleansing foam.

[0033]

EFFECTS OF THE INVENTION The skin cleansing agent of the present invention produces bubbles when the washing liquid passes through a plurality of porous membranes, and the bubbles produced are uniform, creamy and stable. It has excellent properties, good washability, and little skin irritation.

[0034]

EXAMPLES Next, the present invention will be further described with reference to examples, but the present invention is not limited to these examples.

Example 1 A cleaning liquid having the following composition was produced by a conventional method. The obtained cleaning liquid was placed in the container A or B shown in FIG.
The sebum cleansing power and the massage property were evaluated. The results are shown in Table 3.

[0036]

[Table 1]

[0037]

[Table 2] (Evaluation method) Foam quality; Foam is uniform and creamy: ○ Foam is uniform but lacks creaminess: △ Foam is not uniform: × Sebum cleaning power; (1) Towel dry after washing the inside of the forearm Then, 7 areas with a diameter of 26 mm are marked. (Color difference setting; control) (2) Put 20 μl of artificially melted artificial sebum on this area and spread evenly with a spatula. (3) The excess sebum is removed with a tissue and color difference measurement is performed. (E1) (4) Pick up 0.5 ml of foam discharged from each container and wash the area with the index finger (front, back, left, right, clockwise,
Counterclockwise, 5 times each) Rinse with running water. (5) After towel drying, color difference measurement is performed (E2), and the cleaning rate is calculated from the following formula. (Dirt: Artificial oil containing 2.0% carbon black) Cleaning rate (%) = (1-E2 / E1) x 100 Massager; 1.5 g of foam is discharged from each container and the face is massaged using this. The following criteria were used to comprehensively judge the ease of spreading on the face, slippage, and foamyness when doing. Easy to massage: ○ Difficult to massage: △ Difficult to massage: ×

(Container) Container A: 200-mesh polyester screen (N
The bubble discharge container shown in FIG. 1 having two sheets (13B, 18B) manufactured by BC Kogyo Co. Container B: A foam discharge container having the same structure as in FIG. 1 except that the porous film 18B provided at the tip of the discharge port 18 is removed in FIG.

[0039]

[Table 3]

Example 2 A cleaning solution having the following composition was produced by a conventional method. The obtained cleaning liquid was placed in the container A of Example 1, and the foam discharged was homogeneous and creamy, and was stable, and the cleaning power and the massage property were excellent, and the washing property was also good.

[0041]

[Table 4]

Example 3 A cleaning solution having the following composition was produced by a conventional method. The obtained cleaning liquid was placed in the container A of Example 1, and the foam discharged was homogeneous and creamy, and was stable, and was excellent in cleaning power and massage property.

[0043]

[Table 5]

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a foam discharge container used in the present invention.

[Explanation of symbols]

 13 Gas-Liquid Mixing Part 13B Porous Membrane 14 Dip Tube 15 Nozzle Part 18 Discharge Port 18B Porous Membrane

Claims (1)

[Claims] 1. A skin cleanser comprising a foam discharge container having a plurality of porous membranes filled with a cleaning liquid containing 5 to 30% by weight of a higher fatty acid salt.