JP6887854B2 - Solid cleansing agent - Google Patents

Description

The present invention relates to a solid cleansing agent such as a cleansing balm.

In recent years, cosmetics generally do not easily lose their makeup and have a long life. On the other hand, as a cleansing agent for removing makeup, many liquid ones based on liquid oil are known. However, although the liquid cleansing agent has a high cleansing effect, it has a low viscosity and has drawbacks such as dripping during use. As an improvement on this point, a solid cleansing agent such as a cleansing balm has appeared. Cleansing balm is a solid state with no fluidity at room temperature (25 ° C.), but melts at body temperature and becomes liquid. For this reason, since it is viscous even when it melts on the skin, it does not drip, and since the main component is oil, it has the characteristics of being familiar with makeup and having good makeup removal.

Such cleansing balms have a liquid oil (liquid oil) as the main component, and are solid oils for hardening the oils, surfactants, preservatives, and antioxidants for making it easier to blend with stains from the viewpoint of makeup removal. It contains such things as compounding ingredients.
In addition, Patent Document 1 describes such a cleansing balm.

As the liquid oil blended in the conventional cleansing balm, a hydrocarbon oil or an ester oil having a short carbon number is adopted. These are expected to have cost advantages. In addition, most of the oils used in make-up cosmetics these days are hydrocarbons, silicones, and ester oils, and it seems that they are familiar with them.
Further, as the solid oil, about 8 to 15% of solid oil having a melting point of about 50 to 80 ° C. is often blended. Specifically, paraffin wax or the like whose hardness does not increase even at a high melting point is adopted.

JP 2012-206974

However, the conventional cleansing balm having the above-mentioned compounding ingredients is not sufficiently familiar with the skin, and the cleansing effect of makeup, stains, etc. is insufficient.
An object of the present invention is to provide a solid cleansing agent that is easily adapted to the skin and has a sufficient cleansing effect such as cosmetics and stains.

The present invention is a solid cleansing agent containing 30 to 60% of liquid vegetable oil containing 70% or more of unsaturated fatty acids having 8 to 22 carbon atoms and 1 to 7% of solid fats and oils having a melting point of 60 to 80 ° C. , A total of 20 to 50% of a nonionic surfactant having an HLB value of less than 5 and a nonionic surfactant having an HLB value of more than 13.5, and the HLB value of the blended surfactant as a whole is 5 to 13. It is characterized in that it becomes 5.

In the solid cleansing agent according to the present invention, it is preferable that the liquid vegetable oil contains 75% or more of unsaturated fatty acids having 8 to 22 carbon atoms. Further, in the solid cleansing agent according to the present invention, it is preferable that the unsaturated fatty acid is oleic acid.

In one aspect of the solid cleansing agent according to the present invention, the liquid vegetable oil is sunflower seed oil.

In one aspect of the solid cleansing agent according to the present invention, the melting point of the solid fat is preferably 65 to 80 ° C.

The solid cleansing agent according to the present invention preferably contains a nonionic surfactant having an HLB value of more than 13.5, which is solid at room temperature.

In one embodiment of the solid cleansing agent according to the present invention, the nonionic surfactant having an HLB value of more than 13.5 includes a nonionic surfactant having a melting point of 40 ° C. or higher.

According to the present invention, there is provided a solid cleansing agent that is familiar to the skin and has a sufficient cleansing effect.

Hereinafter, the solid cleansing agent according to the present invention will be described in more detail.
In the description of the present specification and the scope of claims, "%" in the blending ratio means "mass%" unless otherwise specified. In addition, what is indicated by "g" as the quantity of an object represents the mass.

The solid cleansing agent according to the present invention contains what is commonly called a cleansing balm, and although it is solid and has no fluidity at room temperature (25 ° C), it melts at body temperature and becomes liquid, so that it dissolves on the skin. However, because it is viscous, it does not easily drip. In addition, since the main component is a liquid vegetable oil, it has the characteristics of being familiar with make-up and having good make-up removal, and has the same or higher quality as the preceding cleansing balm.

The solid cleansing agent according to the present invention mainly contains liquid vegetable oil, solid fat (wax), nonionic surfactant having an HLB value of less than 5, and nonionic surfactant having an HLB value of more than 13.5. Contains a surfactant.

The vegetable oil blended in the solid cleansing agent according to the present invention is liquid at room temperature. Suitable vegetable oils include rapeseed oil, safflower oil, olive oil, sunflower seed oil, macadamia nut oil, grape seed oil (grape seed oil) and the like.

Such liquid vegetable oils preferably contain 70% or more of unsaturated fatty acids having 8 to 22 carbon atoms. Suitable unsaturated fatty acids include oleic acid, linoleic acid, linolenic acid and the like. Most preferably, it is oleic acid. Oleic acid is abundant in sebum and has good compatibility with sebum, and good properties can be expected when removing make-up cosmetics.

As the liquid vegetable oil containing 70% or more of unsaturated fatty acids having 8 to 22 carbon atoms, sunflower seed oil, olive oil and safflower oil are preferable, and sunflower seed oil and safflower oil containing 75% or more are particularly preferable. Is. Most preferably, it is a sunflower seed oil containing 80% or more of oleic acid.
By adopting such sunflower seed oil, oleic acid, which is abundant in sebum, can be enriched, the compatibility with sebum becomes good, and make-up cosmetics mixed with sebum can be removed together.

The solid cleansing agent according to the present invention contains 30 to 60%, preferably 40 to 55% of the liquid vegetable oil. This is because, at least within this range, it is possible to improve the compatibility with sebum as described above and to exert the effect of removing the makeup cosmetics mixed with sebum together.

The solid cleansing agent according to the present invention contains solid fats and oils having a melting point of 60 to 80 ° C, preferably 65 to 80 ° C. Suitable solid fats and oils include solid fats and oils such as carnauba wax, sunflower seed wax, hydrogenated jojoba oil, beeswax, and candelilla wax.
The solid cleansing agent according to the present invention adds solid fats and oils having a high melting point in this way to improve high temperature stability.
The solid cleansing agent according to the present invention contains 1 to 7%, preferably 1.5 to 7% of solid fats and oils having a melting point of 60 to 80 ° C., preferably 65 to 80 ° C. This makes it possible to guarantee high temperature stability in particular.

The surfactant blended in the solid cleansing agent according to the present invention is a nonionic surfactant which is liquid at room temperature and has an HLB value of less than 5, and a nonion which is solid at room temperature and has an HLB value of more than 13.5. It is composed of a system-based surfactant, and these surfactants are used after being adjusted so that the HLB value becomes 5 to 13.5 as a whole.
That is, the entire surfactant to be blended is regarded as a mixture, and the HLB value of the mixture of the surfactants is adjusted so that the HLB value obtained as the weighted average value of the HLB values of each component is 5 to 13.5. And use.
The HLB value is a value that generally indicates the affinity of the surfactant for water and oil. In the present invention, the HLB value obtained by the Griffin method is adopted.
The surfactant used in the solid cleansing agent according to the present invention is preferably naturally derived or contains naturally derived components.

Examples of the nonionic surfactant used in the solid cleansing agent according to the present invention include glycerin fatty acid ester as a naturally derived substance, and saccharide and fatty acid ester such as sorbitan fatty acid ester and sucrose fatty acid ester.
Of these, those having oleic acid as the basic skeleton are most suitable.

Naturally-derived nonionic surfactants that are liquid at room temperature and have an HLB value of less than 5 include, for example, specifically, compounds that are liquid at room temperature, such as sorbitan sesquiisostearate, polyglyceryl pentaoleate, and sorbitan oleate. Can be mentioned.

Further, as a nonionic surfactant having an HLB value of more than 13.5, which can be used in combination with such a nonionic surfactant having an HLB value of less than 5, for example, specifically, as a naturally occurring one. , Ores-20, PEG-80 hydrogenated castor oil, PEG-25 stearate, PEG-15 glyceryl stearate and the like, which are solid compounds at room temperature.
As the nonionic surfactant having an HLB value of more than 13.5, it is preferable to use a solid state at room temperature. As such a nonionic surfactant, it is particularly preferable that the melting point is 40 ° C. or higher. By containing such a nonionic surfactant, it is possible to maintain an appropriate moldability even if the amount of solid fats and oils is small. Therefore, it is possible to obtain a solid cleansing agent that suppresses the formation of granular lumps and the like that are likely to be formed by containing solid fats and oils, and is easily dissolved in water and less likely to cause undissolved residue.

The solid cleansing agent according to the present invention contains a nonionic surfactant having an HLB value of less than 5 and a nonionic surfactant having an HLB value of more than 13.5, and has an HLB value of 5 to 5 as a whole. Adjust so that it becomes 13.5. As a result, the characteristics of the surfactant as a cleansing component can be exhibited.

The solid cleansing agent according to the present invention contains a total of 20 to 50% of a nonionic surfactant having an HLB value of less than 5 and a nonionic surfactant having an HLB value of more than 13.5, and is particularly preferably. Contains 20-35%. Within this range, makeup removal can be particularly improved.

The solid cleansing agent according to the present invention may contain other compounding ingredients in addition to the above-mentioned compounding components as long as the object of the present invention is not impaired. Examples of other compounding ingredients include antioxidants, antioxidants, preservatives, fragrances, bioactive ingredients, natural vitamins, cosmetological ingredients, excipients (formation oils, etc.) and the like.
As a cosmetological ingredient having an antioxidant effect, sage, linden linden, and rosemary are particularly suitable.
Sage has blood circulation promoting, anti-inflammatory, antioxidant and astringent effects.
Tilia linden has moisturizing, anti-inflammatory, blood circulation promoting, astringent, and antioxidant effects.
Rosemary has antioxidant, antibacterial, blood circulation promoting and anti-inflammatory effects.

The solid cleansing agent according to the present invention is solid at normal temperature (25 ° C.) and normal pressure (1 atm), and the dosage form may be rod-shaped, plate-shaped, or the like, and is not particularly limited.

When applied to the skin, the solid cleansing agent according to the present invention melts at that temperature and becomes liquid.

Examples of the solid cleansing agent according to the present invention are shown below. The present invention is not limited to the following examples, comparative examples, test examples, and the like.

Examples 1-7 and Comparative Examples 1-5
As the solid cleansing agent according to the present invention, a cleansing balm was prepared as shown in Table 1 below. In Table 1, Examples 1 to 7 are abbreviated as in Actual 1 and Actual 2, and Comparative Examples 1 to 5 are abbreviated as in Ratio 1 and Ratio 2.

As the liquid vegetable oil, sunflower seed oil containing 80% or more of oleic acid (high oleic sunflower oil, manufactured by Yokoseki Oil & Fat Co., Ltd.) was used.
As the surfactant 1 having an HLB value of less than 5, sorbitan sesquiisostearate having an HLB value of 4.5 (NIKKOL SI-15RV, manufactured by Nikko Chemicals Co., Ltd.) was used.
As the surfactant 2 having an HLB value of more than 13.5, polyglyceryl-10 myristate (NIKKOL Decaglin 1-M, manufactured by Nikko Chemicals Co., Ltd.) having an HLB value of 14.0 was used.
As the surfactant 3 having an HLB value exceeding 13.5, Oles-20 (NIKKOL BO-20V, manufactured by Nikko Chemicals Co., Ltd.) having a melting point of 40 ° C., a solid state at room temperature, and an HLB value of 17.0 is used. There was.
As the solid fat and oil 1, sunflower seed wax having a melting point of 76 ° C. (refined sunflower wax, manufactured by Yokoseki Oil and Fat Co., Ltd.) was used.
As the solid fat and oil 2, hydrogenated jojoba oil having a melting point of 68 ° C. (hydrogenated jojoba oil M-1, manufactured by Watahan Trading Co., Ltd.) was used.

As the shaping oil, a mixed oil of hydrogenated palm oil and hydrogenated palm oil (Super Nucore H, manufactured by Nippon Oil & Fat Co., Ltd.) was used.

In each of Examples 1 to 7 and Comparative Examples 1 to 5, each compounding component was mixed and dissolved at 80 ° C., poured into a mold at 60 ° C., cooled, and solidified to obtain a cleansing balm.

For Examples 1 to 7 and Comparative Examples 1 to 5, make-up cosmetics were removed (sensory test), slimy when washed off (sensory test), stability at 40 ° C (stability test), and solubility near body temperature. (Solubility test) and moldability (moldability test) were evaluated.
The results are shown in Table 1.

1. 1. Sensory test ・ Makeup removal A waterproof eyeliner, liquid foundation, powder foundation, and lipstick were applied to the skin of the forearm and allowed to dry sufficiently. Then, the cleansing balm was applied and washed with water, and the cosmetics left on the skin were confirmed to evaluate the makeup removal.

◎: Waterproof eyeliner, liquid foundation, powder foundation, and lipstick will come off.
○: Liquid foundation, powder foundation, and lipstick fall off.
×: Only lipstick falls off.

・ Slimy when rinsed ◎: If not.
○: If you feel a little slimy.
×: When there is obvious sliminess.

2. Stability test Stored at 40 ° C. for 24 hours and evaluated according to the following evaluation criteria.
⊚: When there is no change in appearance, fragrance or usability.
◯: When there is no change in appearance and there is a slight change in fragrance and usability.
×: When there is a clear change in appearance, fragrance or usability.

3. 3. Solubility test Solubility near body temperature was tested. Evaluation was made according to the following criteria.
◎: Familiar with the skin quickly and does not feel resistance or bumps due to hardness.
◯: Although it takes some time to get used to the skin, there is no feeling of resistance or lumps due to hardness.
×: It does not fit well on the skin, and you feel resistance and bumps due to hardness.

4. Moldability test The moldability when filled at 60 ° C. and cooled to 25 ° C. was determined visually according to the following criteria.
⊚: When the surface begins to solidify at around 50 ° C after filling and there is no separation when the temperature reaches 25 ° C.
◯: When solidified regardless of the temperature range and there is no separation when the temperature reaches 25 ° C.
X: When separation is observed when it does not solidify or reaches 25 ° C.

As can be seen from the results of Comparative Example 3, when the content of the liquid vegetable oil is less than 30%, slimyness at the time of rinsing occurs. Further, when the content is further lowered, the makeup removal is also worsened (Comparative Examples 4 and 5). In Examples 1 to 7, the makeup was removed well, and there was no sliminess when rinsing.

Both Examples 1 to 7 and Comparative Examples 1 to 5 contained naturally-derived solid fats and oils having a high melting point, and were excellent in stability at 40 ° C.

In addition, both Examples 1 to 7 and Comparative Examples 1 to 5 contained 10.1% of a surfactant solid at room temperature having an HLB value of more than 13.5, and the comparison was 2.7%. Even with a low content of solid fats and oils, the hardness was maintained at an appropriate level. That is, it was excellent in moldability.

In Comparative Examples 1 and 2, unlike the other examples, the weighted average value of the HLB value exceeded 13.5. In Comparative Examples 1 and 2, there was a problem in removing makeup. Comparative Examples 1 and 2 show that even if there is no problem in the solubility test, sufficient makeup removal cannot be performed when the weighted average value of the HLB value is not in the range of 5 to 13.5.

Examples 8 and 9 and Comparative Examples 6 to 8
As the solid cleansing agent according to the present invention, cleansing balms having different amounts of Oles-20 were prepared as shown in Table 2 below. In Table 2, Examples 8 and 9 are abbreviated as in Actual 8 and Actual 9, and Comparative Examples 6 to 8 are abbreviated as in Ratio 6.

As the liquid vegetable oil, the surfactants 1 to 3, the solid fats and oils 1 and 2, and the excipient oil, the same ones as in Examples 1 to 7 and Comparative Examples 1 to 5 were used. In addition, cleansing balms were prepared in the same manner as in Examples 1 to 7 and Comparative Examples 1 to 5.

For Examples 8 and 9 and Comparative Examples 6 to 8, the make-up cosmetics were removed (sensory test), stability at 40 ° C. (stability test), solubility near body temperature (solubility test), and moldability (molding). Sex test) was evaluated. The results are shown in Table 2. The test method and evaluation criteria for each test were the same as in Examples 1 to 7 and Comparative Examples 1 to 5.
In Table 2, the results of Example 1 are displayed for comparison and control.

As can be understood from the results of Comparative Examples 6 and 7 which do not contain or have a low content of oleth-20, which is a surfactant solid at room temperature, oleth-is a surfactant solid at room temperature. When the content of 20 is low, it indicates that it is difficult to maintain moldability.

Further, as in Examples 8 and 9, makeup removal is good when the HLB is 13.5 or less, but as in Comparative Example 8, even if the content of Oles-20 is large, the HLB is 13.5. If it exceeds, it is understood that the detergency is reduced.

Examples 10 to 13 and Comparative Examples 9, 10
As the solid cleansing agent according to the present invention, as shown in Table 3 below, cleansing balms having different amounts of sunflower seed wax having a melting point of 76 ° C. and hydrogenated jojoba oil having a melting point of 68 ° C. were prepared. In Table 3, Examples 10 to 13 are abbreviated as in Actual 10 and Actual 11, and Comparative Examples 9 and 10 are abbreviated as in Ratio 9.
In Table 3, the results of Example 1 are displayed for comparison and control.

As the liquid vegetable oil, the surfactants 1 to 3, the solid fats and oils 1 and 2, and the excipient oil, the same ones as in Examples 1 to 9 and Comparative Examples 1 to 8 were used. In addition, cleansing balms were prepared in the same manner as in Examples 1 to 9 and Comparative Examples 1 to 8.
The composition of the surfactants 1 to 3 was the same as that of Example 1, and the HLB value regarded as a mixture was 12.7 in all of Examples 10 to 13 and Comparative Examples 9 and 10.

For Examples 10 to 13 and Comparative Examples 9 and 10, make-up cosmetic drop (sensory test), stability at 40 ° C. (stability test), solubility near body temperature (solubility test), moldability (molding). Sex test) was evaluated. The results are shown in Table 3. The test method and evaluation criteria for each test were the same as in Examples 1 to 9 and Comparative Examples 1 to 8.

In Comparative Example 1 in which solid fats and oils 1 and 2 were not contained at all, stability was lacking.
Further, in Comparative Example 10 in which the total amount of the solid fats and oils exceeded 7%, the solubility was not satisfactory.

Examples 10 to 13 in which the total amount of solid fats and oils was in the range of 1 to 7% had good stability and solubility, and other test results were also good.
The description of each claim described in the claims at the time of filing was as follows.
Claim 1:
A nonionic surfactant containing 30 to 60% of liquid vegetable oil containing 70% or more of unsaturated fatty acids having 8 to 22 carbon atoms, 1 to 7% of solid fats and oils having a melting point of 60 to 80 ° C., and an HLB value of less than 5. A solid cleansing agent containing 20 to 50% of nonionic surfactants having an HLB value of more than 13.5 in total, and having an HLB value of 5 to 13.5 as a whole of the blended surfactants. ..
Claim 2:
The solid cleansing agent according to claim 1, wherein the unsaturated fatty acid is oleic acid.
Claim 3:
The solid cleansing agent according to claim 1 or 2, wherein the liquid vegetable oil is sunflower seed oil.
Claim 4:
The solid cleansing agent according to any one of claims 1 to 3, wherein the nonionic surfactant having an HLB value of more than 13.5 is solid at room temperature.
Claim 5:
The solid cleansing agent according to any one of claims 1 to 4, wherein the nonionic surfactant having an HLB value of more than 13.5 has a melting point of 40 ° C. or higher.

Claims (3)

30 to 60% of liquid vegetable oil containing 70% or more of unsaturated fatty acids having 8 to 22 carbon atoms , 1 to 7% of hydrogenated jojoba oil or sunflower seed wax having a melting point of 60 to 80 ° C., and an HLB value of less than 5. A total of 20 to 50% of a nonionic surfactant and a nonionic surfactant having a HLB value of more than 13.5, a melting point of 40 ° C. or higher, and a solid state at room temperature was blended. A solid cleansing agent characterized in that the HLB value of the surfactant as a whole is 5 to 13.5. The solid cleansing agent according to claim 1, wherein the unsaturated fatty acid is oleic acid. The solid cleansing agent according to claim 1 or 2, wherein the liquid vegetable oil is sunflower seed oil.