KR102311379B1 - Low irritant shampoo composition having improved capacity for forming foam - Google Patents

Abstract

The present invention relates to a shampoo composition that is rich in foam, soft and hypoallergenic, and more specifically, it contains a sulfate-based surfactant, sodium acyl isethionate, an alanine-type amino acid-based surfactant and alkanolamide, and the sodium To provide a hypoallergenic shampoo composition in which the weight ratio of acyl isethionate and the alanine-type amino acid-based surfactant is 1:1 to 1:3.

Description

Hypoallergenic shampoo composition having excellent foaming feeling {Low irritant shampoo composition having improved capacity for forming foam}

The present invention relates to a hypoallergenic shampoo composition having an excellent foaming feeling, and to a shampoo composition having an abundance of foam during shampooing, a soft foaming feeling, and no irritation after use.

Shampoo is used to remove contaminants and sebum from the hair and scalp, and consumer research has shown that the amount of foam in shampoo and washing the scalp and hair are important factors. Shampoo compositions that focus on foaming and cleaning power sometimes cause dryness, itching, and inflammation due to stimulation of surfactants included in the shampoo. So, if you reduce the amount of surfactant to reduce irritation, the feeling of foaming during shampooing weakens, making it unsatisfactory for a clean feeling. Sulfate-based surfactants used in many shampoos are often used as major detergents in shampoos due to their excellent cleaning power, but it is a common industry view that excessive washing may cause irritation to consumers. However, if the sulfate surfactant is not included, the amount of foaming or the foaming power is significantly lowered, and thus there is a disadvantage in that it does not give a satisfactory feeling of use to consumers. In addition, although sulfate-based surfactants have excellent foaming feeling at the time of initial shampooing, there are disadvantages in that the bubbles are sparse and the bubble feeling is not soft.

According to US Patent Publication 2017-0224607, it is mentioned as a composition excellent in cleaning power and conditioning by containing a sulfate-based surfactant, fatty acyl isethionate and cationic polymer, but it lacks in soft foaming feeling, foam stabilization and skin irritation.

An object of the present invention to solve the above problems is,

The present invention relates to a hypoallergenic shampoo composition having an excellent foaming feeling, and an object of the present invention is to provide a shampoo composition having a rich foaming amount during shampooing, a soft foaming feeling, and no irritation after use.

An aspect of the present invention for achieving the above object is,

sulfate-based surfactants; sodium acyl isethionate; Alanine-type amino acid-based surfactant represented by the following formula (1); and alkanolamides represented by the following formula (2); including,

To provide a hypoallergenic shampoo composition in which the weight ratio of the sodium acyl isethionate and the alanine-type amino acid-based surfactant is 1:1 to 1:3.

<Formula 1>

R ¹ COA

(Here, R ¹ is a straight-chain or branched alkyl or alkenyl having 8 to 20 carbon atoms, and A is an amino acid alanine)

<Formula 2>

(Wherein, R ² is an alkyl group having 8 to 22 carbon atoms, X is -CHR ³ CH ₂ OH, R ³ is H or an alkyl group having 1 to 3 carbon atoms, and Y is H, an alkyl group having 1 to 3 carbon atoms, an alkanol group, or same as X)

The hypoallergenic shampoo composition according to the present invention can obtain an effect in which the shampoo bubbles without irritation are abundant and the feeling of the bubbles is soft.

Hereinafter, the present invention will be described in more detail.

sulfate-based surfactants; sodium acyl isethionate; Alanine-type amino acid-based surfactant represented by the following formula (1); and alkanolamides represented by the following formula (2); including,

It relates to a hypoallergenic shampoo composition in which the weight ratio of the sodium acyl isethionate and the alanine-type amino acid-based surfactant is 1:1 to 1:3.

<Formula 1>

R ¹ COA

(Here, R ¹ is a straight-chain or branched alkyl or alkenyl having 8 to 20 carbon atoms, and A is an amino acid alanine)

<Formula 2>

(Wherein, R ² is an alkyl group having 8 to 22 carbon atoms, X is -CHR ³ CH ₂ OH, R ³ is H or an alkyl group having 1 to 3 carbon atoms, and Y is H, an alkyl group having 1 to 3 carbon atoms, an alkanol group, or same as X)

The sulfate-based surfactant according to an embodiment of the present invention may be used without limitation to components known in the art.

The sulfate-based surfactant is preferably at least one selected from sodium laureth sulfate, sodium lauryl sulfate, ammonium laureth sulfate and ammonium lauryl sulfate.

When the sulfate-based anionic surfactant is included, foaming is quick and rich foam is formed, so that a satisfactory cleaning effect can be obtained with freshness during rinsing.

The content of the sulfate surfactant is preferably included in an amount of 3 to 12% by weight, more preferably in an amount of 9 to 11% by weight, based on the total weight of the hypoallergenic shampoo composition.

If the sulfate surfactant is included in less than 3% by weight, the cleaning function may not be properly exhibited, and if it exceeds 12% by weight, irritation may be caused.

According to an embodiment of the present invention, sodium acyl isethionate suitable for use in the shampoo composition forms an ester bond by using a fatty acid group as a hydrophobic group and sodium isethionate as a hydrophilic group, and the hydrophilic group is separated into ions in an aqueous phase to form anionic It is an anionic surfactant representing

The content of the sodium acyl isethionate may be included in an amount of 0.1 to 5% by weight, preferably 0.5 to 3% by weight, based on the total weight of the hypoallergenic shampoo composition.

If the content of the sodium acyl isethionate is less than 0.1% by weight, the cleaning power or the foaming feeling may be reduced, and if it exceeds 5% by weight, the solubility is deteriorated, and when another surfactant is added to increase the solubility, irritation may be caused.

The sodium acyl isethionate exhibits excellent surface activity, has excellent foaming power, and forms a soft foaming feeling with less irritation. The sodium acyl isethionate suitable for use in the present invention is preferably at least one selected from sodium cocoyl isethionate, sodium lauroyl isethionate and sodium lauroyl methyl isethionate.

According to an embodiment of the present invention, the alanine-type amino acid-based surfactant can reduce skin irritation due to low cytotoxicity and good skin affinity as well as detergency and foaming power.

The alanine-type amino acid-based surfactant is synthesized by using a long-chain higher fatty acid as a hydrophobic group and alanine as a hydrophilic group, and may be represented by the following formula (1).

<Formula 1>

R ¹ COA

In Formula 1, R ¹ is a straight-chain or branched C 8 to C 20 alkyl group or alkenyl group, and A is an amino acid alanine.

Specific examples of the alanine-type amino acid-based surfactant include myristyl alanate, sodium cocoyl alaninate, and TEA cocoyl alaninate.

The content of the alanine-type amino acid-based surfactant may be included in an amount of 0.1 to 10% by weight, preferably 1 to 5% by weight, based on the total weight of the hypoallergenic shampoo composition.

When the alanine-type amino acid-based surfactant is contained in an amount of less than 0.1% by weight, detergency or foaming power cannot be expected, and when it exceeds 10% by weight, it is difficult to give a soft foaming feeling, and an excessive amount of surfactant may rather stimulate irritation.

In the present invention, the alkanolamide is a nonionic surfactant. When only the content of anionic surfactant in the shampoo composition is increased, the cleaning power is excellent, but the bubbles are not stable, the feeling of bubbles is not good, and the hair may become tangled and damaged. Therefore, it is possible to reduce damage to the scalp or hair while simultaneously using the anionic surfactant and a non-ionic surfactant with low irritation while increasing the cleaning power and the foaming power.

According to one embodiment, the alkanolamide may be represented by the following formula (2).

<Formula 2>

In Formula 2, R ² is an alkyl group having 8 to 22 carbon atoms, X is -CHR ³ CH ₂ OH, R ³ is H or an alkyl group having 1 to 3 carbon atoms, Y is H, an alkyl group having 1 to 3 carbon atoms, an alkanol group or X may be the same.

The content of the alkanolamide may be included in an amount of 0.1 to 3% by weight, preferably 0.3 to 2% by weight, based on the total weight of the hypoallergenic shampoo composition.

When the alkanolamide is included in an amount of less than 0.1% by weight, bubble stability is inferior, and when it exceeds 3% by weight, it may irritate the scalp, and may inhibit the softness of the hair.

The alkanolamide is preferably at least one selected from cocamide MEA, lauramide MEA, behenamide MEA, acetamide MEA, cocamide DA and cocamide mipa.

According to an embodiment of the present invention, the weight ratio of the sodium acyl isethionate and the alanine-type amino acid-based surfactant is preferably 1:1 to 1:3.

When the weight ratio of the sodium acyl isethionate and the alanine-type amino acid-based surfactant is out of the above range, it is difficult to give a satisfactory feeling of use because a small amount of bubbles is felt due to a dense feeling of bubbles or the texture of the bubbles is weak.

The composition of the present invention may further include a wetting agent, a conditioning agent, an oil, a flavoring agent, a preservative, a vitamin, a protein, an opacifying agent, a colorant, a thickening agent and a viscosity adjusting agent, a pH adjusting agent, a dye, and the like.

The opacifying agent is, for example, titanium dioxide, mica, fatty acid glycols such as ethylene glycol mono- or di-stearate, and the preservative is, for example, sodium benzoate, 1,2-hexanediol, phenoxyethanol, zinc p. Lythion, etc. may be used, and as a thickener and viscosity modifier, hydroxypropylmethylcellulose, hydroxymethylcellulose, sodium chloride, ammonium chloride, propylene glycol, and hexylene glycol may be used. In addition, citric acid, sodium hydroxide, and triethanolamine are used as a pH adjuster, and a water-soluble tar color can be used as a dye, and as a conditioning agent, hydrocarbon oil, alkyl or benzyl esters (Alkyl or Benzyl Esters), Extracts, proteins and protein variants, high alcohol (Fatty Alcohol), dimethicone commonly referred to as silicone, dimethicone, amodimethicone, cyclomethicone, etc. Conventional hair conditioning ingredients may be used alone or in combination.

Hereinafter, Examples and Comparative Examples of the present invention will be described. These Examples and Comparative Examples are only for illustrating the present invention, and the scope of the present invention is not limited thereto.

That is, other modifications of the present invention may be permitted within the scope of those skilled in the art of human cleansing compositions without departing from the spirit and scope of the present invention.

All percentages in the present invention are percentages by weight of the total composition unless otherwise indicated, and all ratios are by weight unless otherwise indicated. Unless otherwise indicated, all percentages, ratios and contents of ingredients referred to in the present invention are based on the actual amounts of the ingredients.

Example 1 to 6: Shampoo composition

According to the present invention, the shampoo compositions of Examples were prepared as shown in Table 1 below.

Composition (wt%) Example One 2 3 4 5 6 Sodium Laureth Sulfate 10 12 10 12 10 10 Sodium Cocoyl Isethionate One One One 3 2 - Sodium Lauroyl Methyl Isethionate - - - - - One Sodium Cocoyl Alaninate 2 One 3 5 4 2 Cocamide M.A. 0.5 0.5 0.5 0.5 - 0.5 cocamide mipa - - - - 0.5 - trihydroxystearin 0.3 0.3 0.3 0.3 0.3 0.3 Guarhydroxypropyl
Trimonium Chloride 0.3 0.3 0.3 0.3 0.3 0.3 dimethicone One One One One One One incense appropriate amount appropriate amount appropriate amount appropriate amount appropriate amount appropriate amount Citric Acid appropriate amount appropriate amount appropriate amount appropriate amount appropriate amount appropriate amount Purified water remaining amount remaining amount remaining amount remaining amount remaining amount remaining amount

comparative example 1 to 5: Shampoo composition

According to the present invention, a shampoo composition of Comparative Example was prepared as shown in Table 2 below.

Composition (wt%) comparative example One 2 3 4 5 Sodium Laureth Sulfate 15 10 10 10 10 Sodium Cocoyl Isethionate - 6 - 5 2 Sodium Cocoyl Alaninate 2 - 12 One 4 Cocamide M.A. 0.5 0.5 0.5 0.5 - trihydroxystearin 0.3 0.3 0.3 0.3 0.3 Guarhydroxypropyl
Trimonium Chloride 0.3 0.3 0.3 0.3 0.3 dimethicone One One One One One incense appropriate amount appropriate amount appropriate amount appropriate amount appropriate amount Citric Acid appropriate amount appropriate amount appropriate amount appropriate amount appropriate amount Purified water remaining amount remaining amount remaining amount remaining amount remaining amount

This composition according to the above-mentioned Examples and Comparative Examples undergoes the following manufacturing process according to the compositions of Tables 1 and 2. Sodium laureth sulfate, sodium cocoyl isethionate, sodium cocoyl alaninate, and trihydroxystearin are added to purified water, heated to a temperature of 90˚C, stirred at this temperature, and then cooled to a temperature of 45˚C. . After that, guar hydroxypropyltrimonium chloride was added and stirred, and then the remaining raw materials were added and stirred for 30 minutes to prepare a shampoo.

Experimental example 1: Evaluation of foaming force

200 ml of the shampoo 0.25% solution prepared in Examples 1 to 3 and Comparative Examples 1 to 5 was free-falling for 30 seconds to a diameter of 3.0 mm using a pipette from a height of 90 cm in a cylinder of 50 mm in diameter containing 50 ml of the same shampoo solution. The bubbles were measured and the results are shown in Table 3 below. The shampoo dilution solution and the cylinder for bubble measurement were maintained at 40°C.

Example comparative example One 2 3 One 2 3 4 Foam force (mm) 250 265 255 180 160 200 170 Bubble stability after 1 hour (mm) 240 250 250 160 150 155 150

As a result of the test, it can be seen that Examples 1 to 3 according to the present invention have better foaming power and foaming stability than Comparative Examples 1 to 4, which deviates from the preferred weight ratio of sodium acyl isethionate and alanine-type amino acid-based surfactant.

Experimental example 2: human body patch Test- Stimulus Assessment

A human patch test was performed to diagnose whether the shampoos prepared in Example 1 and Comparative Examples 1 to 3 caused an irritant reaction or an allergic reaction or a skin reaction.

Thirty healthy male and female adults aged 20 to 40 years who had not taken antihistamines at least 1 week before, or had skin diseases that could affect the patch test, such as psoriasis, eczema, or acne. . After 24 hours had elapsed after the samples of Examples and Comparative Examples were applied in the same manner to all subjects, the patch was removed. After allowing them to rest for at least 1 hour, the first reading was performed, and the second reading was performed after 48 hours had elapsed. The average skin reactivity was calculated with the results read at 24 hours and 48 hours, and the test results are shown in Table 4 below.

Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 result hypoallergenic strong stimulus strong stimulus strong stimulus

As a result of the test, if you look at Comparative Examples 1 to 3 according to the present invention, it can be confirmed that the stimulation is higher than in Example 1 when it is outside the preferred content range or does not contain sodium acyl isethionate or alanine-type amino acid-based surfactant. could

Experimental example 3: Consumer Rating

Consumer evaluation was conducted to evaluate the feeling of use and irritation of the shampoo compositions prepared in Examples and Comparative Examples.

A comparison test was conducted by selecting 120 women in their 30s and 40s. The lowest score was 1 point and the highest score was 5 points. The test results are shown in Table 5 below.

Evaluation items Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Fast foaming when swallowing 4.5 4.2 2.8 3.3 3.0 4.0 Abundant amount of bubbles during shampoo 4.2 3.8 3.8 3.3 3.4 3.2 The feeling of the bubble is soft 4.0 2.5 3.0 2.8 3.5 3.2 hair is soft 4.0 2.5 2.2 2.1 3.0 3.5 No itching, no dandruff, no pimples, etc. 4.8 2.8 3.0 3.1 3.2 3.4

As a result of the consumer test, it can be confirmed that Example 1 according to the present invention is superior to Comparative Examples 1 to 5 in terms of foaming speed, bubble amount, and bubble softness of the shampoo, as well as hair softness and stimulation.

Claims (7)

sulfate-based surfactants; sodium acyl isethionate; Alanine-type amino acid-based surfactant represented by the following formula (1); and alkanolamides represented by the following formula (2); including,
The hypoallergenic shampoo composition, characterized in that the weight ratio of the sodium acyl isethionate and the alanine-type amino acid-based surfactant is 1:1 to 1:3.

<Formula 1>
R ¹ COA
(Here, R ¹ is a straight-chain or branched alkyl or alkenyl having 8 to 20 carbon atoms, and A is an amino acid alanine)

<Formula 2>

(Here, R ² is an alkyl group having 8 to 22 carbon atoms, X is -CHR ³ CH ₂ OH, R ³ is H or an alkyl group having 1 to 3 carbon atoms, and Y is H, an alkyl group having 1 to 3 carbon atoms, an alkanol group, or same as X)
According to claim 1,
Based on the total weight of the hypoallergenic shampoo composition, 3 to 12% by weight of a sulfate-based surfactant; 0.1 to 5% by weight of sodium acyl isethionate; 0.1 to 10% by weight of an alanine-type amino acid-based surfactant; and 0.1 to 3% by weight of alkanolamide.
According to claim 1,
The sulfate-based surfactant is a hypoallergenic shampoo composition, characterized in that at least one selected from sodium laureth sulfate, sodium lauryl sulfate, ammonium laureth sulfate and ammonium lauryl sulfate.
According to claim 1,
The sodium acyl isethionate is a hypoallergenic shampoo composition, characterized in that at least one selected from sodium cocoyl isethionate, sodium lauroyl isethionate and sodium lauroyl methyl isethionate.
According to claim 1,
The alanine-type amino acid-based surfactant is a hypoallergenic shampoo composition, characterized in that at least one selected from myristyl alanate, sodium cocoyl alaninate, and TEA cocoyl alaninate.
According to claim 1,
The alkanolamide is a hypoallergenic shampoo composition, characterized in that at least one selected from among cocamide MA, lauramide ME, behenamide MA, acetamide MA, cocamide DA, and cocamide MIPA.
According to claim 1,
The hypoallergenic shampoo composition further comprises at least one additive selected from a wetting agent, a conditioning agent, an oil, a fragrance, a preservative, a vitamin, a protein, an opacifying agent, a colorant, a thickener, a viscosity adjusting agent, a pH adjusting agent, and a dye A hypoallergenic shampoo composition comprising