Hair-lifting agent

Abstract

To provide a hair-lifting agent having an effect of lifting hair or eyelashes.SOLUTION: Acidic aqueous solution of pH 3.5 to 6.5 contains 1) acidic polymer and 2) sodium dihydrogen phosphate and / or potassium dihydrogen phosphate.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a hair-raising promoter that has the effect of making scalp hair, eyelashes, etc. stand up by applying it to the scalp, the base of eyelashes, etc. [Background technology]

[0002] Various techniques for giving firmness and body to hair have been reported (for example, Patent Document 1

[0087] lines 7-8). However, no techniques have been reported that show an effect of improving the loss of volume that occurs when hair becomes flat due to weakening of the arrector pili muscles. Patent Document 2 discloses an acidic topical composition containing water, acidic polysaccharides, and acid as essential ingredients, which has a hair-growth effect of making hair smooth and supple, suppressing hair loss, and promoting hair growth. Furthermore, Patent Document 3 discloses a hair care product that suppresses hair loss in a short period of time, has a rapid effect, and contains a water-soluble and acidic polymer as an active ingredient. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2024-010247 [Patent Document 2] Patent Publication No. 2014-114321 [Patent Document 3] Japanese Patent Publication No. 9-295918 Summary of the Invention [Problem to be solved by the invention]

[0004] The loss of hair volume can be caused by the hair itself becoming thinner or thinner. However, when hair lies flat, it can appear as if the entire hair is stuck to the head, which can also be a problem as it reduces the volume. Hair growth agents and hair care products do not have the effect of making hair stand up, so they do not require hair growth and cannot instantly fulfill the desire to increase hair volume. In recent years, eyelash beauty treatments have become popular, and there is a demand for eyelashes that curl upward. To achieve this, methods such as eyelash curling are used, but these are not only time-consuming, but also pose the risk of burns, and the effect is only temporary. While there are many eyelash serums on the market, while they can give the eyelashes firmness and strength, there are no serums that actually make the eyelashes stand up. Therefore, there was a demand for technology to make hair, eyelashes, etc. stand up. [Means for solving the problem]

[0005] The present inventors have discovered that an acidic aqueous solution having a pH of 3.5 to 6.5 containing, as essential ingredients, 1) an acidic polymer and 2) sodium dihydrogen phosphate and / or potassium dihydrogen phosphate has the effect of making hair, eyelashes, etc. stand up, and have completed the present invention. [Effects of the Invention]

[0006] The hair erection promoter of the present invention, when applied to the skin on which hair, eyelashes, etc. grow, instantly makes the hair, eyelashes, etc. stand up, gives hair a sense of volume, and makes eyelashes look longer by making them point upward. [Brief explanation of the drawings]

[0007] [Figure 1A] Photographs of the hair before the start of the test are shown in FIG. 1A[1] before application of Example 2 of the present invention, and in FIG. 1A[2] before application of tap water for comparison. [Figure 1B] Photographs of the hair were taken one minute after the start of the test. Figure 1B[1] shows the hair one minute after application of Example 2 of the present invention, and Figure 1B[2] shows the hair one minute after application of tap water for comparison. [Figure 1C] Photographs of the hair taken 12 hours after the start of the test are shown in Figure 1C[1], 12 hours after application of Example 2 of the present invention, and Figure 1C[2], 12 hours after application of tap water. BEST MODE FOR CARRYING OUT THE INVENTION

[0008] The hair-raising promoter of the present invention can be produced by simply dissolving 1) an acidic polymer and 2) sodium dihydrogen phosphate and / or potassium dihydrogen phosphate in water. The acidity of the hair-raising promoter is preferably pH 3.5 to 6.5, more preferably pH 4.5 to 6.0. The amount of the acidic polymer to be added is preferably 0.001 to 10.0% by mass, more preferably 0.1 to 5.0% by mass, of the total amount of the hair-raising promoter. The amount of sodium dihydrogen phosphate and / or potassium dihydrogen phosphate to be added may be any amount that causes the acidity of the hair-raising promoter to fall within the pH range of 3.5 to 6.5, and may be approximately the same as the amount of the acidic polymer to be added. The acidic polymer of the hair-raising promoter of the present invention is not particularly limited as long as it is a water-soluble polymer having an acidic group that can be used in topical preparations, but is preferably one or more selected from the group consisting of carboxyvinyl polymer, alkyl-modified carboxyvinyl polymer, sodium alginate, potassium alginate, and carrageenan.

[0009] The hair-raising promoter of the present invention may further contain an acidic or basic substance to adjust the acidity. The acidic or basic substance may be any substance that is commonly used in external preparations, without any particular limitation.

[0010] Alcohol may further be added to the hair-raising promoter of the present invention in order to improve penetration into the skin and retention on the skin. The alcohol is not particularly limited as long as it can be used in topical preparations, and examples thereof include monohydric alcohols such as ethanol, and polyhydric alcohols such as glycerin, propylene glycol, n-propyl alcohol, isopropyl alcohol, propanediol, pentylene glycol, 1,2-hexanediol, and 1,3-butylene glycol.

[0011] The water used in the hair-raising promoter of the present invention is not particularly limited, and filtered water, distilled water, deionized water, etc. can be used.

[0012] The present invention will now be described in detail with reference to examples, but the present invention is not limited to these examples. [Example]

[0013] Example 1 87.4% by mass of distilled water, 10% by mass of glycerin, 1% by mass of sodium alginate, 1.5% by mass of sodium dihydrogen phosphate, and 0.1% by mass of carboxyvinyl polymer were mixed and dissolved according to a conventional method to obtain a hair-raising promoter with a pH of 4.3.

[0014] Example 2 77.99% by mass of distilled water, 10% by mass of ethanol, 10% by mass of propanediol, 1% by mass of potassium alginate, 1% by mass of potassium dihydrogen phosphate, and 0.01% by mass of alkyl-modified carboxyvinyl polymer were mixed and dissolved according to a conventional method to obtain a hair-raising promoter with a pH of 4.7.

[0015] Example 3 78.9% by mass of deionized water, 10% by mass of glycerin, 10% by mass of 1,3-butylene glycol, 0.5% by mass of sodium alginate, 0.5% by mass of sodium dihydrogen phosphate, and 0.1% by mass of carboxyvinyl polymer were mixed and dissolved according to a conventional method to obtain a hair-raising promoter with a pH of 4.9.

[0016] Example 4 88.98% by mass of Japanese Pharmacopoeia purified water, 10% by mass of ethanol, 1% by mass of sodium dihydrogen phosphate, 0.01% by mass of carboxyvinyl polymer, and 0.01% by mass of alkyl-modified carboxyvinyl polymer were mixed and dissolved according to a conventional method to obtain a hair-raising promoter with a pH of 4.9.

[0017] Example 5 77.99% by mass of distilled water, 10% by mass of ethanol, 10% by mass of propanediol, 1% by mass of potassium alginate, 1% by mass of potassium dihydrogen phosphate, and 0.01% by mass of alkyl-modified carboxyvinyl polymer were mixed and dissolved according to a conventional method to obtain a hair-raising promoter with a pH of 4.7.

[0018] Example 6 78.89% by mass of Japanese Pharmacopoeia purified water, 10% by mass of pentylene glycol, 10% by mass of 1,3-butylene glycol, 0.5% by mass of sodium alginate, 0.5% by mass of sodium dihydrogen phosphate, 0.1% by mass of carboxyvinyl polymer, and 0.01% by mass of alkyl-modified carboxyvinyl polymer were mixed and dissolved according to a conventional method to obtain a hair-raising promoter with a pH of 4.1.

[0019] Example 7 83.90% by mass of Japanese Pharmacopoeia purified water, 10% by mass of glycerin, 5% by mass of 1,3-butylene glycol, 0.5% by mass of potassium alginate, 0.5% by mass of sodium dihydrogen phosphate, 0.05% by mass of carboxyvinyl polymer, and 0.05% by mass of alkyl-modified carboxyvinyl polymer were mixed and dissolved according to a conventional method to obtain a hair-raising promoter with a pH of 4.2.

[0020] Example 8 85% by mass of deionized water, 8% by mass of glycerin, 6% by mass of 1,3-butylene glycol, 0.5% by mass of carrageenan, and 0.5% by mass of sodium dihydrogen phosphate were mixed and dissolved in a conventional manner to obtain a hair-raising promoter with a pH of 4.7.

[0021] The hair-raising promoter of the present invention was evaluated as follows. Test Example 1 Test 1 on increasing hair volume The subjects were two men, one aged 36 and the other aged 41, who were separately tested under the supervision of a third party. When the subjects rubbed an appropriate amount of the hair-raising promoter of Example 1 into their scalps, they reported that their hair immediately stood up without feeling sticky. For both subjects, a third party present visually confirmed that the volume of their hair increased within 10 seconds of applying the hair-raising promoter of the present invention.

[0022] Test Example 2 Test 2 on increasing hair volume The subject was a 68-year-old man. An appropriate amount of the hair-erection promoter of Example 2 was rubbed into the scalp, and photographs of the hair were taken 1 minute later (Fig. 1B[1]) and 12 hours later (Fig. 1C[1]). These were compared with the untreated hair before the test (Fig. 1A[1]). For further comparison, the hair was wet with tap water, and photographs of the hair were taken before the test (Fig. 1A[2]), 1 minute after massaging the hair with water (Fig. 1B[2]), and 12 hours later (Fig. 1C[2]). Because the hair on the top of the head is short, it is difficult to judge the effect on the hair on the top of the head. However, as shown in Figure 1B[1], the bangs clearly stood up one minute after using the hair-erection promoter of Example 2, and as shown in Figure 1C[1], it is clear that the effect lasted for 12 hours. On the other hand, when hair is simply wetted with water, as shown in Figure 1B[2], it only stands up slightly when combed with hands, and as shown in Figure 1C[2], it is clear that the effect does not last for 12 hours. From the above results, it is clear that the hair-raising promoter of the present invention has the effect of making hair stand in a very short time and the effect continues for a certain period of time.

[0023] Test Example 3: Test on eyelash lifting The test subjects were two women, aged 21 and 33. An appropriate amount of the piloerection stimulant of Example 3 was rubbed into the base of the eyelashes. All subjects felt their eyelashes lifted within one minute of applying the piloerection stimulant of Example 3. [Industrial Applicability]

[0024] The hair-raising promoter of the present invention is useful because it increases the volume of hair and makes eyelashes stand up by making the hair and eyelashes stand up.

Claims

1. A hair-raising promoter having a pH of 3.5 to 6.5, comprising as essential components 1) an acidic polymer and 2) sodium dihydrogen phosphate and / or potassium dihydrogen phosphate.

2. 2. The hair-raising promoter according to claim 1, wherein the acidic polymer is one or more selected from the group consisting of carboxyvinyl polymer, alkyl-modified carboxyvinyl polymer, sodium alginate, potassium alginate, and carrageenan.

3. The hair-raising promoter according to claim 1 or 2, wherein 1) the acidic polymer and 2) sodium dihydrogen phosphate and / or potassium dihydrogen phosphate are present in an amount of 0.01 to 10% by mass relative to the total amount of the aqueous solution.

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