JPH04247021A - Foaming cleanser composition - Google Patents

Abstract

PURPOSE:To provide a foaming cleanser composition comprising a silicone betaine type amphoteric surfactant, a higher fatty acid and/or a salt thereof, water and a propellant, extremely reduced in the irritation of skin and having excellent touch and foam stability. CONSTITUTION:A foaming cleanser composition comprises a betaine group- containing siloxane compound of formula [R<1> is monovalent hydrocarbon group; R<2> is R<1>, group of formula II (R<3> is divalent hydrocarbon; R<4> is alkyl, etc.); (m) and (n) are an integer of 0-1000] (e.g. a compound of formula III in an amount of approximately 5-15wt.%, a higher fatty acid and/or a salt thereof of the formula R<5>COOM<1> (R<5> is 8-18C hydrocarbon; M<1> is H, alkali metal, organic amine) (e.g. myristic acid or lauric acid in an amount of approximately 1-5wt.%), water, and a propellant such as dichloromethane or a liquidized petroleum gas. The composition can be applied to shaving foams, face cleansers, body cleansers, hand cleaners, etc.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foam cleansing composition that is less irritating to the skin and has excellent usability and foam stability.

0002

[Prior Art and Problems to be Solved by the Invention] Conventionally, shaving foams and facial cleansers containing higher fatty acid salts, lauryl sulfates, acyl glutamates, etc. as main ingredients have been known as foam cleansing compositions. ing. However, higher fatty acid salts and lauryl sulfate were not satisfactory in terms of skin irritation. Furthermore, in the case of acyl glutamate, there was a problem in that foam stability was lacking.

[0003] Therefore, the inventors of the present invention have conducted intensive research to improve the drawbacks of the prior art, and have previously filed an application (
Patent Application No. 1-269897) A silicone-based betaine type amphoteric surfactant (having the general formula (
A)), higher fatty acid and/or its salt (general formula (
The present inventors have discovered that a mixture of B)), water, and a propellant results in a foam cleaning composition with extremely little skin irritation and excellent usability and foam stability.

[0004] That is, an object of the present invention is to provide a foam cleaning composition that causes extremely little skin irritation and has excellent usability and foam stability.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the foam cleaning composition of the present invention has the following configuration. That is, a silicone betaine type amphoteric surfactant represented by the following general formula (A), a higher fatty acid and/or its salt represented by the following general formula (B), water, and a propellant are blended. This is a foam cleaning composition characterized by: General formula (A)

[Formula 4] [However, R1 is the same or different substituted or unsubstituted monovalent hydrocarbon group having 1 to 18 carbon atoms, and R2 is the same as R1 or the following formula

[Chemical formula 5] (However, R3 is a divalent hydrocarbon group having 1 to 10 carbon atoms, R
4 is an alkyl group having 1 to 3 carbon atoms or

embedded image x and y are each integers of 1 to 3. ), the remainder is the same or different substituted or unsubstituted hydrocarbon group having 1 to 18 carbon atoms, and m and n are integers of 0 to 1000. ] A betaine group-containing siloxane compound. General formula (B) R5 COOM1 (where R is a linear or branched saturated or unsaturated hydrocarbon group having an average of 8 to 18 carbon atoms, and M represents a hydrogen atom, an alkali metal, or an organic amine). higher fatty acids and/or their salts.

The betaine group-containing siloxane compound represented by the general formula (A) in the present invention can be produced, for example, as follows.

11 equipped with a thermometer, stirrer, and reflux condenser
The average composition formula below is in the flask.

400 g (0.23 mol) of a siloxane compound having
N-methylaminoethanol 169g (2.25mol)
, and 200 g of isopropanol, and heated under reflux for 6 hours.
Allowed time to react. Next, the low boiling point components in this reaction solution were distilled off under reduced pressure at 80° C./4 mmHg over 4 hours. The reaction product (siloxane compound) thus obtained had a viscosity at 25° C. of 2932 cs, a specific gravity of 1.044, a refractive index of 1.4493, and an amine equivalent of 392 g/mol.

Next, 200 g (0.09 mol) of the siloxane compound obtained in the above reaction, 54 g (0.46 mol) of monochloroacetic acid sodium salt dissolved in 130 g of water,
and 186 g of 1,2-propylene glycol were charged into flask No. 11, and reacted with stirring at 100°C for 12 hours to form the following composition formula.

A water-propylene glycol solution of a betaine group-containing siloxane compound having the following formula was obtained.

A 0.1% aqueous solution was prepared from the siloxane compound having the above average composition formula, and the surface tension at 20°C was measured to be 29.0 dyne·cm -1 .

[0010]The average molecular weight 1 expressed by the above compositional formula
Propylene glycol (31%
) and water (22%) is abbreviated as composition (a).

[0011] Also, by the same manufacturing method, an average molecular weight of 2
400, propylene glycol (30%
) and water (20%) is abbreviated as composition (b).

Furthermore, by the same manufacturing method, an average molecular weight of 9
A solution of a betaine group-containing siloxane compound having an amount of 20 betaine groups (numbers/molecule) 2 in propylene glycol (30%) and water (20%) is abbreviated as composition (c).

The amount of the silicone betaine type amphoteric surfactant, which is the first essential component of the composition of the present invention, is preferably 1 to 20% by weight, more preferably 5 to 15% by weight based on the total amount of the composition. It is.

[0014] Further, the higher fatty acid and/or its salt which is the second essential component of the composition of the present invention has the above general formula (C).
The amount of these compounds alone or in combination of two or more is preferably 0.000000000000000000000000000000000000000000000000000000000000000000000,000.
It is 1 to 10% by weight, more preferably 1 to 5% by weight.

Examples of propellants used in the present invention include dichlorodifluoromethane, trichloromonofluoromethane, dichlorotetrafluoroethane, chlorofluorocarbon gas, propane, butane, liquefied petroleum gas (hereinafter abbreviated as LPG), and dimethyl ether. is possible,
One or more of these gases may be applied. Also,
The blending amount thereof is preferably 8 to 10% by weight based on the total amount of the composition.

[0016] In addition to the above-mentioned essential ingredients, the foam cleaning composition of the present invention optionally contains N-acyl acidic amino acid salts, N-acyl, N-alkyl amino acid salts, fatty acid alkanolamides, N-acyl acidic amino acid salts, Components commonly used in foam cleaning compositions, such as peptides, humectants, higher alcohols, oils, disinfectants, thickeners, pigments, and fragrances, can be added.

The composition of the present invention can be applied to shaving foams, facial cleansers, body cleansers, hand cleaners, and the like.

The foam cleaning composition of the present invention can be prepared, for example, by heating and mixing the silicone betaine type amphoteric surfactant and water (65 to 75°C), and then adding molten higher fatty acids with stirring. It can be produced by solubilizing, adding a neutralizing agent if necessary, and cooling to prepare a stock solution, and filling this stock solution together with a propellant (for example, LPG) into a sealed container.

[0019]

[Examples] The present invention will be explained in more detail with reference to Examples below. In addition, the numerical values in each example and comparative example are the total amount (1
00%). In addition, the effectiveness was measured using the following evaluation method.

■ Skin irritation (protein denaturation rate) test method Using aqueous high performance liquid chromatography, the ovalbumin denaturation rate when a sample is added to an ovalbumin pH 7 buffer solution at a sample concentration of 1% is determined by Measurement was performed using an absorption peak at 220 nm. Ho: Height H of the 220 nm absorption peak of ovalbumin
s: 220 when the sample is added to the ovalbumin buffer solution
The criteria for evaluating the height of the nm absorption peak was set as follows. ◎: Ovalbumin denaturation rate less than 30% ○: Ovalbumin denaturation rate 30% or more and less than 60% △: Ovalbumin denaturation rate 60% or more and less than 80% ×: Ovalbumin denaturation rate 80% or more

[0021]
■ Feeling of use evaluation method A panel of 30 women between the ages of 18 and 25 conducted a sensory test using facial wash, and comprehensively evaluated the feel of the foam, ease of rinsing, cleansing performance, and the presence or absence of tightness and irritation on the skin after washing the face. and evaluated based on the following criteria. 5: The usability is very good 4: The usability is a little good 3: The usability is average 2: The usability is a little bad 1: The usability is very bad The average value of the evaluation scores of 30 panelists is calculated for each sample. It was used as a feeling of use.

[0022] Method for evaluating foam stability: A sample material filled in a sealed container with a propellant is injected into a 500 ml graduated cylinder to collect a certain amount of foam, and the top of the graduated cylinder is covered with a sheet and left to stand still. The rate of change in foam height was determined from the foam height immediately after injection and the foam height after 30 minutes of standing, and the stability of the foam was evaluated based on the following criteria. A: Rate of change less than 1% Extremely stable foam B: Rate of change 1-5% Stable foam C: 〃 5-
10% Slightly unstable foam D: 〃 10% or more Very unstable foam

Example (1)
, (2), Comparative Examples (1) to (4) (Facial cleanser) (1) Composition The composition of the stock solution was as shown in Table 1, and the propellant (A) was LPG (
3 kg/cm2, 20°C).

[0024]

[Table 1]

(2) Preparation method After uniformly dissolving and mixing the stock solution composition, it was placed in a predetermined aerosol container, and a predetermined valve was attached while degassing the upper air with a vacuum pump. Then, the propellant is press-filled,
A facial cleanser was prepared.

(3) Characteristics The various tests described above were conducted on this facial cleanser, and the results of examining its characteristics are shown in Table 2.

[0027]

[Table 2]

As shown in Table 2, good results were obtained in Examples (1) and (2) of the facial cleansing agent, which is a foamy cleansing composition of the present invention. On the other hand, Comparative Examples (1) and (2) were inferior in terms of skin irritation and did not have a good feeling of use, and Comparative Example (3) was inferior in terms of foam stability and did not have a sufficient feeling of use.

Example (3), Comparative Examples (5) to (7) (Body Cleansing Agent) (1) Composition The composition of the stock solution was as shown in Table 3, and dichlorodifluoromethane was used as the propellant.

[0030]

[Table 3]

(2) Preparation method A body cleansing agent was prepared in the same manner as in the example of the facial cleansing agent.

(3) Characteristics The various tests described above were conducted on this body cleansing agent, and the results of examining its characteristics are shown in Table 4.

[0033]

[Table 4]

As shown in Table 4, the body cleansing agent (3) of Example of the present invention obtained good results in various tests. On the other hand, Comparative Examples (5) and (6) did not give good results in terms of feeling of use and foam stability, and Comparative Example (7) was not favorable in terms of skin irritation and feeling of use. .

Examples (4), (5), Comparative Example (8) (Shaving Foam) (1) Composition The composition of the stock solution was as shown in Table 5, and the propellant was a mixture of LPG and dichlorodifluoromethane. .

[0036]

[Table 5]

(2) Preparation method A shaving foam was prepared in the same manner as the preparation method of the facial cleansing agent example.

(3) Characteristics The above-mentioned tests were conducted on this shaving foam,
Table 6 shows the results of investigating its characteristics.

[0039]

[Table 6]

As shown in Table 6, Examples (4) and (5)
obtained good results in various tests, but Comparative Example (8) did not give good results in terms of feeling of use and foam stability.

[0041]

INDUSTRIAL APPLICABILITY As described above, it is clear that the present invention provides a useful foamy skin cleansing composition that causes very little skin irritation and has excellent usability and foam stability.

Claims (1)

[Claims] [Claim 1] A silicone betaine type amphoteric surfactant represented by the following general formula (A) and the following general formula (B)
1. A foam cleaning composition comprising a higher fatty acid and/or a salt thereof, water, and a propellant. General formula (A) [Formula 1] [However, R1 is the same or different substituted or unsubstituted monovalent hydrocarbon group having 1 to 18 carbon atoms, R2 is the same as R1 or the following formula [Formula 2] (However, R3 is a divalent hydrocarbon group having 1 to 10 carbon atoms, R
4 is an alkyl group having 1 to 3 carbon atoms, or [Image Omitted] x and y are each an integer of 1 to 3. ), the remainder is the same or different substituted or unsubstituted hydrocarbon group having 1 to 18 carbon atoms, and m and n are integers of 0 to 1000. ] A betaine group-containing siloxane compound. Represented by the general formula (B) R5 COOM1 (where R is a linear or branched saturated or unsaturated hydrocarbon group having an average of 8 to 18 carbon atoms, and M represents a hydrogen atom, an alkali metal, or an organic amine). higher fatty acids and/or their salts.