JP7586474B2 - Hair cleansing composition - Google Patents

Description

The present invention relates to a hair cleansing composition that has excellent hair cleansing power, is easy to run your fingers through when rinsing, leaves hair feeling moist and manageable after drying, and has good high-temperature stability.

Traditionally, it has been common to use treatments or conditioners after shampooing in order to improve the finish of hair. Also, to accommodate those who don't want to take the time to wash their hair, many rinse-in shampoos have been developed that allow for washing and conditioning at the same time. However, the problem with rinse-in shampoos is that the finish of hair is inferior to that of hair that has been left after washing with a treatment or conditioner.

To solve the above problems, a composition for washing and conditioning hair has been proposed that contains ester oil, fatty acid amidoamine and/or quaternary ammonium salt, and a cooling agent, and thereby has excellent hair cleansing power, is easy to run your fingers through when rinsing, and leaves hair feeling moist and manageable after drying (Patent Document 1).

However, although this composition has excellent hair cleansing power, is easy to run your fingers through when rinsing, and leaves hair feeling moisturized and manageable after drying, there are concerns about its stability at high temperatures, and a composition with improved high temperature stability is desired.

JP 2017-197467 A

The present invention provides a hair cleansing composition that has excellent hair cleansing power, is easy to run your fingers through when rinsing, leaves hair feeling moist and manageable after drying, and has good high-temperature stability.

As a result of intensive research into solving the above problems, the present inventors discovered that by containing at least one selected from (A-1) methylheptyl palmitate or (A-2) neopentyl glycol dicaprate, (B) a cationic surfactant, and (C) a higher alcohol having 14 to 22 carbon atoms that is solid at 25°C, it is possible to obtain a hair cleansing composition that has excellent hair cleansing power, is easy to run your fingers through when rinsing, leaves hair feeling moist and manageable after drying, and has good high-temperature stability, and thus completed the present invention.

The present invention provides a hair cleansing composition that has excellent hair cleansing power, is easy to run your fingers through when rinsing, leaves hair feeling moist and manageable after drying, and has good high-temperature stability.

The present invention will be described in detail below. Note that all units indicating content are mass% unless otherwise specified.

The present invention is a hair cleansing composition that contains at least one selected from (A-1) methylheptyl palmitate or (A-2) neopentyl glycol dicaprate, (B) a cationic surfactant, and (C) a higher alcohol having 14 to 22 carbon atoms that is solid at 25°C.

From the viewpoint of cleaning power, the present invention can contain one or more selected from (A-1) methylheptyl palmitate or (A-2) neopentyl glycol dicaprate.

The content of one or more selected from the (A-1) component or the (A-2) component used in the present invention is preferably 2 to 12%, more preferably 4 to 10%. If the content of one or more selected from the (A-1) component or the (A-2) component is less than 2%, the cleaning power may be deteriorated, and if the content of one or more selected from the (A-1) component or the (A-2) component is more than 12%, the cleaning power and high temperature stability may be deteriorated.

The (A-1) component and the (A-2) component used in the present invention are preferably used in combination from the viewpoint of improving the cleaning power.

The mass ratio ((A-1)/(A-2)) of the component (A-1) to the component (A-2) used in the present invention is preferably 0.08 to 13, more preferably 0.17 to 6, from the viewpoint of cleaning power. If the mass ratio of the component (A-1) to the component (A-2) is less than 0.08 or exceeds 13, cleaning power may be deteriorated.

The present invention contains a cationic surfactant (B) from the viewpoints of smoothness when rinsing hair and moisturized and manageable feel after drying.

The content of the (B) used in the present invention is preferably 0.84 to 3.22%, more preferably 1.19 to 2.45%. If the (B) component is less than 0.84%, the hair may become less smooth to the touch when rinsing and less moist and manageable after drying. If the (B) component is more than 3.22%, the hair may become less smooth to the touch when rinsing and less manageable after drying.

The component (B) used in the present invention is not particularly limited, but examples thereof include lauryl trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride, behenyl trimethyl ammonium chloride, lauryl trimethyl ammonium bromide, cetyl trimethyl ammonium bromide, stearyl trimethyl ammonium bromide, dialkyl dimethyl ammonium chloride, distearyl dimethyl ammonium chloride, etc.

The component (B) used in the present invention is preferably one or more selected from (B-1) stearyltrimethylammonium chloride or (B-2) behenyltrimethylammonium chloride, from the viewpoints of the ease of running your fingers through the hair when rinsing, and the moist and manageable feel of the hair after drying.

The (B-1) component and the (B-2) component used in the present invention are preferably used in combination from the viewpoints of the ease of running your fingers through the hair when rinsing, and the moist feeling and manageability of the hair after drying.

The mass ratio ((B-1)/(B-2)) of the (B-1) component to the (B-2) component used in the present invention is preferably 0.04 to 19.25, more preferably 2 to 9.19, from the viewpoint of the ease of running fingers through the hair when rinsing and the moist feeling and manageability after drying. If the mass ratio of the (B-1) component to the (B-2) component is less than 0.04 or exceeds 19.25, the ease of running fingers through the hair when rinsing and the moist feeling and manageability after drying may be deteriorated.

From the viewpoint of high temperature stability, the present invention contains a higher alcohol having 14 to 22 carbon atoms that is solid at 25°C.

The content of the (C) component used in the present invention is preferably 2 to 15%, and more preferably 5 to 12%. If the (C) component is less than 2% or exceeds 15%, high temperature stability may be impaired.

The component (C) used in the present invention is not particularly limited, but examples thereof include myristyl alcohol, cetanol, stearyl alcohol, arachyl alcohol, and behenyl alcohol. One or more types of component (C) may be contained.

The component (C) used in the present invention is preferably one or more selected from cetanol or stearyl alcohol from the viewpoint of high temperature stability, and it is more preferable to use cetanol and stearyl alcohol in combination.

The viscosity of the hair cleansing composition of the present invention is preferably 10,000 to 80,000 mPa·s at 20°C. If the viscosity is less than 10,000 mPa·s, the high temperature stability may be poor. If the viscosity exceeds 80,000 mPa·s, the applicability may be poor.

The viscosity of the hair cleansing composition of the present invention at 20°C was measured by filling 120 g of the hair cleansing composition prepared by a conventional method into a 140 g sample bottle (Food 140: manufactured by Daiichi Glass Co., Ltd.), leaving it at 20°C for one day to adjust the temperature, and then measuring the viscosity at 20°C using a helical stand-equipped B-type viscometer (model: digital viscometer TVB-10M, manufactured by Toki Sangyo Co., Ltd.) at a rotation speed of 6 rpm for one minute with a No. 4 rotor.

The pH of the hair cleansing composition of the present invention is preferably 4 to 8 at 20°C.

The pH of the hair cleansing composition of the present invention at 20°C was measured using a glass electrode type hydrogen ion concentration indicator (F-71, manufactured by Horiba, Ltd.) after the hair cleansing composition prepared by a conventional method was left to stand at 20°C for one day and the temperature was adjusted.

In addition to the essential components, the hair cleansing composition of the present invention may contain at least one selected from various components used in ordinary cosmetics, quasi-drugs, pharmaceuticals, etc., such as surfactants other than component (B), oily components other than components (A) or (C), moisturizers, chelating agents, medicinal ingredients, protein derivatives, hydrolyzed proteins, stabilizers, antioxidants, plant extracts, herbal extracts, vitamins, preservatives, dyes, pigments, powders, UV absorbers, fragrances, etc., to the extent that they are not impaired. However, they are not limited to these examples.

The dosage form of the present invention is not particularly limited, but is preferably a milky lotion or cream, and more preferably a cream.

The present invention will be described in more detail below with reference to examples, but these are not intended to limit the present invention in any way.

In the evaluation tests of the present invention, the components and their contents in the hair cleansing composition were varied. The units showing the contents of each component are all mass %, and the compositions were prepared in the usual manner.

In the evaluation test methods shown in this specification, "cleaning power," "fingers running smoothly when rinsing," "moisturizing feeling after drying," "moisture after drying," and "high temperature stability" were evaluated using the following methods.

(1) Detergency: For each of the hair wash compositions shown in Tables 1 to 3, 10 expert panelists applied 0.1 g of lanolin as model sebum to a bundle of human hair (5 g, 20 cm: 100% black, root-aligned, product number: BS-A, manufactured by Bealux Co., Ltd.), and then applied 1 g of the hair wash composition and washed the hair. Then, a sensory evaluation of the detergency of each of the hair wash compositions was performed according to the following criteria.
5: The cleaning power was very good.
4: The cleaning power was good.
3: The cleaning power was somewhat good.
2: The cleaning power was somewhat poor.
1: The cleaning power was poor.
The results were expressed as the average value of the 10 panelists' ratings and were expressed as cleaning power according to the following criteria.
The average values were rounded to one decimal place.
◎: Average value is 4.0 or more. 〇: Average value is 3.2 to 3.9.
△: average value is 2.5 to 3.1
×: Average value is 2.4 or less

(2) Finger-running ability during rinsing For each of the hair wash compositions shown in Tables 1 to 3, 10 expert panelists applied 1 g of the hair wash composition to a bundle of human hair (5 g, 20 cm: 100% black with roots aligned, product number: BS-A, manufactured by Bealux Co., Ltd.) and washed the hair, and performed a sensory evaluation of the finger-running ability during rinsing according to the following criteria.
5: The hair felt very smooth to the touch.
4: I felt that it was smooth to the touch.
3: The hair felt slightly smooth to the touch.
2: The hair felt a little rough to the touch.
1: The hair felt rough to the touch.
The results were expressed as an average value of 10 panelists' scores in terms of finger smoothness during rinsing according to the following criteria.
The average values were rounded to one decimal place.
◎: Average value is 4.0 or more. 〇: Average value is 3.2 to 3.9.
△: average value is 2.5 to 3.1
×: Average value is 2.4 or less

(3) Moist feeling after drying For each of the hair wash compositions shown in Tables 1 to 3, 10 professional panelists applied 1 g of the hair wash composition to a bundle of human hair (5 g, 20 cm: 100% black, root-aligned, product number: BS-A, manufactured by Bealux Co., Ltd.), washed, rinsed and dried, and performed a sensory evaluation of the moist feeling after drying according to the following criteria.
5: Felt very moist.
4: It felt moist.
3: There was a slight feeling of moisture.
2: It felt a little lacking in moisture.
1: There was no moist feeling.
The results were expressed as the average value of the 10 panelists' ratings in terms of moisturized feel of hair according to the following criteria.
The average values were rounded to one decimal place.
◎: Average value is 4.0 or more. 〇: Average value is 3.2 to 3.9.
△: average value is 2.5 to 3.1
×: Average value is 2.4 or less

(4) Management Feel after Drying For each of the hair wash compositions shown in Tables 1 to 3, 10 professional panelists applied 1 g of the hair wash composition to a bundle of human hair (manufactured by Beaulax Co., Ltd., "5 g, 20 cm: 100% black, root-aligned, product number: BS-A"), washed, rinsed and dried, and performed a sensory evaluation of management feel after drying according to the following criteria.
5: I felt there was a great sense of unity.
4: I felt there was a sense of unity.
3: There was a sense of cohesion.
2: There was a feeling that it was somewhat lacking in cohesion.
1: I felt there was no sense of cohesion.
The results were expressed as an average value of the 10 panelists' ratings of manageability of hair after drying according to the following criteria.
The average values were rounded off to one decimal place.
◎: Average value is 4.0 or more. 〇: Average value is 3.2 to 3.9.
△: average value is 2.5 to 3.1
×: Average value is 2.4 or less

(5) High-Temperature Stability A test for evaluating high-temperature stability was carried out for each of the hair wash compositions shown in Tables 1 to 3. In the evaluation test, 120 g of the hair wash compositions obtained in the Examples and Comparative Examples were placed in a 140 g sample bottle (Food 140: manufactured by Daiichi Glass Co., Ltd.) and stored at 50° C., and visually evaluated according to the following criteria.
⊚: No separation or water peeling is observed even after 3 months or more at 50°C.
◯: No separation was observed after storage at 50° C. for less than 3 months, but water peeling was observed.
Δ: No separation was observed after storage at 50° C. for less than one month, but water peeling was observed.
×: Separation was observed within 3 days at 50°C.

Examples 1 to 42 shown in Tables 1 to 3 showed excellent hair cleansing power, smooth finger-combing during rinsing, good moisturizing and manageability after drying, and good high-temperature stability.

Example 43 of the hair cleansing composition is described below.

The hair cleansing compositions obtained in the following examples had excellent hair cleansing power, were easy to run your fingers through when rinsing, left hair feeling moist and manageable after drying, and had good high-temperature stability.

<Example 43>
Component Content (mass%)
(A-1) Methylheptyl palmitate 5.40
(A-2) Neopentyl glycol dicaprylate 1.35
(B-1) Stearyl trimethyl ammonium chloride 1.40
(B-2) Behenyltrimethylammonium chloride 0.24
(C) Cetanol 4.30
(C) Stearyl alcohol 4.30
O-[2-hydroxy-3-(trimethylammonio)propyl] chloride
Guar gum 0.20
Glycerin 2.60
Propylene glycol 3.40
1,3-butylene glycol 3.90
Disodium edetate 0.02
Fragrance 0.20
Methyl parahydroxybenzoate 0.20
Lauryl amidopropyl betaine (30%) 0.01
Menthol 0.15
Sodium citrate 0.05
Peach kernel oil 0.01
Peach juice extract 0.01
Purified water 72.26
Total 100.00
pH (20℃) 6.0

The present invention has resulted in a hair cleansing composition that has excellent hair cleansing power, is easy to run your fingers through when rinsing, leaves hair feeling moist and manageable after drying, and has good high-temperature stability.

Claims (5)

A hair wash composition comprising: (B) one or more cationic surfactants selected from (A-1) methylheptyl palmitate and (A-2) neopentyl glycol dicaprate; and (C) a higher alcohol having 14 to 22 carbon atoms that is solid at 25° C., wherein the content of component (B) is 0.84 to 3.22 mass%. The hair wash composition according to claim 1, wherein the content of one or more selected from the (A-1) component and the (A-2) component is 2 to 12% by mass. The hair cleansing composition according to claim 1 or 2, which contains the component (A-1) and the component (A-2). The hair wash composition according to any one of claims 1 to 3, wherein the mass ratio ((A-1)/(A-2)) of the component (A-1) to the component (A-2) is 0.08 to 13. The hair wash composition according to any one of claims 1 to 4, wherein the component (B) is at least one selected from (B-1) stearyltrimethylammonium chloride or (B-2) behenyltrimethylammonium chloride.