JP7215377B2 - cleansing composition - Google Patents

Description

The present invention relates to cleansing compositions. More specifically, the present invention provides a cleansing composition that maintains high cleansing power even when wet with a small amount of water at the time of use, maintains transparency in appearance, and has good rinsability when washed off. Regarding.

In recent years, due to improvements in the durability and water resistance of makeup, oil-based cleansing cosmetics having stronger cleansing power than water-based cleansing cosmetics are often used. Since oily cleansing cosmetics are composed of a large amount of oily components and surfactants, they are well compatible with makeup and have excellent cleansing power. However, when an oily cleansing cosmetic is used with wet hands or face, if even a small amount of water is mixed with the cosmetic, it becomes an emulsified state, and the cleansing power may be remarkably lowered. Furthermore, when rinsing after cleansing, a sticky feeling peculiar to oily ingredients remains on the skin, resulting in a poor feeling of use.

Under such circumstances, an oil-based cleansing cosmetic has been reported that can maintain high cleansing power and excellent washability even when the skin is wet with a small amount of water (Patent Document 1). In addition, a cleansing cosmetic has been reported that even when used on wet skin, it blends well with makeup, has an excellent cleansing effect, can be easily washed off with water, and has good storage stability (Patent Document 2). .

On the other hand, in recent years, there has been a strong demand for cosmetics with high transparency in appearance from the viewpoint of improving added value such as a sense of luxury in appearance and the use of high-purity ingredients. However, the conventional oil-based cleansing cosmetics have excellent cleansing power when mixed with water, but have a problem that the transparency of the appearance is reduced. An oil-based cleansing cosmetic that has both properties has not been proposed.

JP 2013-237646 JP 2000-327529

In view of the above circumstances, the object of the present invention is to be stable against emulsification and have excellent water resistance, so that it has excellent cleansing power even when mixed with water, and has a transparent appearance before and after mixing with water. To provide a cleansing composition which maintains its properties and has good rinsability when rinsed off.

The present inventors have conducted intensive studies to solve the above problems, and found that the above objects can be achieved by using a specific nonionic surfactant, a polyhydric alcohol, and the like.

That is, the cleansing composition of the present invention includes the following components (A) 5 to 35% by mass, component (B) 5 to 20% by mass, component (C) 10 to 35% by mass, component (D) It is characterized by containing 10 to 40% by mass.
(A) Polyoxyethylene (5-30) mono fatty acid glyceryl (B) Polyoxyethylene (5-30) glycerin (C) Polyhydric alcohol having 2 to 6 carbon atoms (D) Oily liquid at 25°C component

Furthermore, the cleansing composition of the present invention can contain 5 to 25% by mass of a nonionic surfactant having an HLB of 2 to 6 and a polyhydric alcohol skeleton as component (E).

Additionally, the cleansing composition of the present invention may contain 0.1 to 10% by weight of an anionic surfactant as component (F).

According to the present invention, in recent years, in the field of oil-based cleansing cosmetics, which have become widely used in response to improvements in makeup durability and water resistance, when water is mixed, it becomes an emulsified state and cleansing. In response to the problems in the prior art that both strength and transparency of appearance are reduced, and that the feeling of use is bad when rinsing after cleansing, water resistance is stable against emulsification even when mixed with water. Since it has a It has the effect of improving the added value of reminiscent of use, and furthermore, the rinsability at the time of washing is good, so that the sticky feeling peculiar to oily ingredients does not remain on the skin and the feeling of use is good.

Hereinafter, the component (A) in the cleansing composition of the present invention will be described in order.

<Component (A) Polyoxyethylene (5-30) mono-fatty acid glyceryl>
One of the characteristics of the present invention is to use polyoxyethylene (5-30) mono-fatty acid glyceryl as component (A).

Specific polyoxyethylene (5-30) mono fatty acid glyceryl includes polyoxyethylene (caprylic/capric acid) glyceryl, polyoxyethylene coconut oil fatty acid glyceryl, polyoxyethylene monococonut oil fatty acid glyceryl, polyoxyethylene lauric acid. Glyceryl, polyoxyethylene glyceryl oleate, polyoxyethylene glyceryl monomyristate, polyoxyethylene glyceryl monostearate, polyoxyethylene glyceryl isostearate and the like.
Among these, polyoxyethylene (caprylic/capric acid) glyceryl, polyoxyethylene coconut oil fatty acid glyceryl, and polyoxyethylene monococonut oil fatty acid glyceryl are preferable.

The amount of component (A) is 5 to 35% by mass, preferably 10 to 30% by mass, more preferably 10 to 25% by mass. If it is less than 5% by mass, the cleansing power may decrease, and if it exceeds 35% by mass, the rinsability may decrease.

The numbers in parentheses represent the number of added moles of oxyethylene, and the number of added moles of oxyethylene in component (A) is 5 to 30, preferably 5 to 20, more preferably 5 to 10. If it is less than 5, a stable composition cannot be obtained, and if it exceeds 30, the cleansing power may decrease.

<Component (B) Polyoxyethylene (5-30) glycerin>
One of the characteristics of the present invention is to use polyoxyethylene (5-30) glycerin as component (B).

The amount of component (B) is 5 to 20% by mass, preferably 5 to 15% by mass, more preferably 10 to 15% by mass. If it is less than 5% by mass, a stable composition cannot be obtained, and if it exceeds 20% by mass, the transparency of the composition in the presence of water may be reduced.

The number of added moles of oxyethylene in component (B) is 5-30, preferably 5-20, more preferably 5-10. If it is less than 5, a stable composition cannot be obtained, and if it exceeds 30, it may cause stickiness and deteriorate rinsability.

The ratio of (A)/(B) is preferably 1-5, more preferably 2-4. If the ratio of (A)/(B) is less than 1, the transparency of the composition in the presence of water may be reduced, and if it exceeds 5, the cleansing power may be reduced.

<Component (C) polyhydric alcohol having 2 to 6 carbon atoms>
One of the characteristics of the present invention is to use a polyhydric alcohol having 2 to 6 carbon atoms as the component (C).

Specific examples of polyhydric alcohols having 2 to 6 carbon atoms include ethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, glycerin, diglycerin, glucose, maltose and sorbitol. Preferred are 1,3-butylene glycol and glycerin. These components (C) may be used singly or in combination of two or more.

The content of component (C) is 10 to 35% by mass, preferably 15 to 30% by mass. If it is less than 10% by mass, a stable formulation cannot be obtained, and the transparency of the composition in a state in which water is mixed may decrease. If it exceeds 35% by mass, rinsability may deteriorate. be.

<Component (D) an oily component that is liquid at 25°C>
One of the features of the present invention is that an oily component that is liquid at 25°C is used as the component (D).

Examples of oils that are liquid at 25° C. include polar oils such as ester oils and triglycerides, and non-polar oils such as hydrocarbon oils and silicone oils. Among them, polar oils such as ester oils and triglycerides are preferably contained.

Ester oils that are liquid at 25°C include ethyl oleate, ethyl linoleate, isopropyl myristate, isopropyl palmitate, isopropyl isostearate, cetyl 2-ethylhexanoate, isocetyl 2-ethylhexanoate, and 2-ethylhexanoate. Stearyl, isostearyl 2-ethylhexanoate, cetyl palmitate, 2-ethylhexyl palmitate, 2-hexyldecyl isostearate, isostearyl isostearate, trimethylolpropane triisostearate, myristyl myristate, cetyl myristate, myristic acid Octyldodecyl, isostearyl myristate, isocetyl myristate, hexyl laurate, decyl oleate, octyldodecyl oleate, isostearyl pivalate, isopropyl isostearate, isononyl isononanoate, 2-ethylhexyl isononanoate, isodecyl isononanoate, isononanoic acid Isotridecyl, octyldodecyl erucate, neopentyl glycol didecanoate, pentaerythrityl tetraethylhexanoate, diisostearyl malate, trimethylolpropane triethylhexanoate, didecyl adipate, cholesteryl isostearate, bacyl isostearate, monohydroxy stearic acid curing Castor oil, isostearyl lanolin fatty acid, isopropyl lanolin fatty acid, octyldodecyl lanolin fatty acid, cetyl ricinoleate, propylene glycol, propylene glycol dinonanoate, propylene glycol di(caprylic/capric acid), propylene glycol diisostearate, propylene glycol dioleate, etc. I can give an example. One or more of these can be used as the ester oil.
Preferred ester oils include, for example, cetyl 2-ethylhexanoate, isocetyl 2-ethylhexanoate, isopropyl palmitate, 2-ethylhexyl palmitate, isopropyl isostearate, 2-hexyldecyl isostearate, octyldodecyl myristate, and myristic acid. isopropyl, isostearyl myristate, isocetyl myristate, isononyl isononanoate, 2-ethylhexyl isononanoate, isodecyl isononanoate, and isotridecyl isononanoate.

Triglycerides that are liquid at 25°C include higher fatty acids having 6 or more carbon atoms such as caproic acid, caprylic acid, capric acid, 2-ethylhexanoic acid, isotridecanic acid, isopalmitic acid, isostearic acid, eicosanoic acid, and oleic acid, and glycerin. triglycerides; animal and vegetable oils and fats such as olive oil, sunflower oil, safflower oil, castor oil and camellia oil; One or more of these can be used as such triglycerides.
Preferred triglycerides include, for example, triglycerides of higher fatty acids having 6 to 10 carbon atoms such as caproic acid, caprylic acid, capric acid and 2-ethylhexanoic acid and glycerin, or triglycerides of mixtures of these higher fatty acids and glycerin, such as triglycerides of (caprylic/capric) glycerides, glyceryl tri-2-ethylhexanoate.

Hydrocarbon oils that are liquid at 25°C include liquid paraffin, hydrogenated polyisobutene, hydrogenated polydecene, squalane, squalene, pristane, light isoparaffin, light liquid isoparaffin, heavy liquid isoparaffin, liquid isoparaffin, tetradecene, isohexadecane, isododecane, Examples include α-olefin oligomers.
Preferred hydrocarbon oils are, for example, liquid paraffin, hydrogenated polyisobutene and squalane. One or more of these can be used as the hydrocarbon oil.

Examples of silicone oils that are liquid at 25° C. include dimethicone, cyclomethicone, and phenyl dimethicone. Preferred silicone oils are, for example, cyclomethicones such as decamethylcyclopentasiloxane. One or more of these can be used as the silicone oil.

The content of component (D) is 10 to 40% by mass, preferably 15 to 35% by mass, particularly preferably 20 to 30% by mass. If it is less than 10% by mass, the cleansing power may be insufficient, and if it exceeds 40% by mass, the rinsability may be poor.

<Component (E) Nonionic Surfactant with HLB of 2 to 6>
The cleansing composition of the present invention may contain a nonionic surfactant with an HLB of 2-6 as component (E). By using the component (E), the cleansing power is improved, and excellent rinsing effect can be obtained.

The HLB of component (E) is 2-6, preferably 3-6, more preferably 4-6. If the HLB is less than 2, a stable composition cannot be obtained, and if the HLB exceeds 6, it may not be possible to provide sufficient cleansing power.

Specific nonionic surfactants with an HLB of 2 to 6 include polyoxyethylene hydrogenated castor oils such as PEG-2 hydrogenated castor oil and PEG-10 hydrogenated castor oil, polyoxyethylene (5 to 15) tri(caprylic/capric) glyceryl, polyoxyethylene (5-15) glyceryl tricoate, polyoxyethylene (5-10) glyceryl trioleate, polyoxyethylene (5-10) glyceryl tristearate, and polyoxyethylene (5-10) glyceryl triisostearate.
Among these, polyoxyethylene (5-10) tri(caprylic/capric acid) glyceryl and polyoxyethylene (5-10) tricoate oil fatty acid glyceryl are preferable from the viewpoint of cleansing power.

The content of component (E) is preferably 5 to 25% by mass, more preferably 10 to 20% by mass, in that the cleansing power and rinsability can be further enhanced.

Here, the HLB value can be determined by the following formula proposed by Kawakami (Kawakami: Science, 23, 546 (1953)).
HLB value = 7 + 11.7 · Log (MW/MO)
(Here, MW represents the molecular weight of the hydrophilic group and MO represents the molecular weight of the lipophilic group.)

<Component (F) anionic surfactant>
The cleansing composition of the present invention may contain an anionic surfactant as component (F). By using the component (F), the cleansing power is improved, and excellent rinsing effect can be obtained.

Examples of anionic surfactants include alkyl sulfates, polyoxyethylene alkyl ether sulfates, alkylamide ether sulfates, polyoxyethylene amide ether sulfates, polyoxyethylene alkyl ether acetates, alkyl phosphates, polyoxy ethylene alkyl ether phosphate, α-olefin sulfonate, higher fatty acid salt, N-acyl amino acid salt, N-acyl isethionate, N-acyl methyl taurate, N-acyl polypeptide salt, alkyl sulfosuccinate, etc. mentioned. Among these, polyoxyethylene alkyl ether sulfates, N-acylmethyl taurine salts, and N-acylamino acid salts are preferred. The carbon number of these alkyl groups or acyl groups is preferably 10 to 18, particularly preferably 12 to 14, from the viewpoint of cleansing power. Alkyl groups and acyl groups may be derived from saturated fatty acids, unsaturated fatty acids, or mixed fatty acids. Mixed fatty acids include, for example, coconut oil fatty acid, palm kernel oil fatty acid, and the like.
Examples of these counterions include alkali metal salts, alkaline earth metal salts, ammonium salts, alkanolamine salts, amino acid salts and the like.
Specific examples of component (F) anionic surfactants include, for example, PEG (2) sodium lauryl ether sulfate, sodium cocoyl methyl taurate, sodium cocoyl methyl taurate, sodium cocoyl glutamate, sodium lauroylmethylalanine, and the like. . Among these, sodium cocoyl methyl taurate, sodium cocoyl methyl taurate, and sodium lauroyl methyl alanine are particularly preferred from the viewpoint of cleansing power and rinsability during rinsing.
As the component (F), one or more selected from the above anionic surfactants can be used.

The amount of component (F) is preferably 0.1 to 10% by mass, more preferably 0.1 to 5% by mass, more preferably 0.1 to 5% by mass, in that the cleansing power and rinsability can be further enhanced. is 0.5 to 2% by mass.

The water resistance in the present invention means that the emulsification stability of the cleansing composition is maintained even in a state where water is mixed, and the cleansing power does not decrease, assuming use in a bathroom or the like.

The cleansing composition of the present invention further optionally contains various components commonly used in cosmetics, such as alcohols other than component (C) such as ethanol, within a range that does not impair the effects of the present invention. Vitamins, UV absorbers, water-soluble polymers, antioxidants, anionic surfactants, cationic surfactants, amphoteric surfactants, other nonionic surfactants, sequestering agents, carboxyvinyl polymers, etc. thickeners, preservatives, pigments, powders and the like can be blended.

EXAMPLES The present invention will be described in more detail with reference to examples below, but the present invention is not limited by these. Unless otherwise specified, all compounding amounts are % by mass.

(Sample preparation)
According to the compositions shown in Tables 1-2, cleansing compositions of Examples 1-12 and Comparative Examples 1-6 were prepared, and the following evaluation results were also shown in Tables 1-2, respectively. The numbers in parentheses for component (A) and component (B) in Tables 1 and 2 represent the number of added moles of oxyethylene.

(a) Appearance evaluation immediately after preparation Each sample obtained in the examples and comparative examples was a glass sample bottle (mouth inner diameter x body diameter x height: Φ41 x Φ55 x 95 mm
), and the appearance immediately after preparation was visually observed and evaluated according to the following criteria.
○: Transparent.
Δ: Slightly cloudy but transparent, or cloudy but not transparent (emulsified).

(B) Appearance evaluation of the cleansing composition in which water is mixed For each sample obtained in Examples and Comparative Examples, 20% by weight of water is added based on the total weight, and the appearance when mixed is evaluated. , was visually observed in the same manner as immediately after preparation, and evaluated according to the following criteria.
A: Transparent.
◯: Slightly cloudy, but transparent.
Δ: Turbid and not transparent (emulsified).

(c) Detergency evaluation of cleansing composition with water mixed In order to check the cleansing power when the skin is wet with water, eyeliner (Coffret d'Or ( (registered trademark) manufactured by Kanebo Cosmetics Co., Ltd.) was uniformly applied to form a circle with a diameter of 2 cm, and dried in a constant temperature and humidity room at 25°C and a relative humidity of 50% for 30 minutes. Wet hand use was measured and for each sample, 20% by weight of water, based on total weight, was added and mixed. 50 mg of each was blended with a finger into a dry eyeliner circle for 5 seconds and then rinsed off with running water. After natural drying, the detergency of the eyeliner was evaluated using a spectrophotometer (CM-2500c, Konica Minolta) according to the following criteria. An average detergency of 70% or more was evaluated as “⊚”, less than 70% and 50% or more as “◯”, and less than 50% as “Δ”.
Detergency = (1-(ΔE2)/(ΔE1)) x 100
ΔE1 (color difference between makeup before washing and the inside of the upper arm)
ΔE2 (color difference between make-up after washing and the inside of the upper arm)

(d) Evaluation of rinsability After performing the evaluation of detergency in (c) above, each panelist evaluated the state immediately after rinsing with warm water of about 37 ° C. for 5 seconds in 5 stages according to the following evaluation criteria. and scored. The total score of evaluation by 10 panelists was evaluated as "⊚" when 25 points or more, "∘" when 18 points or more and less than 25 points, and "Δ" when less than 18 points.
3: The oil content was completely washed away, giving a very refreshing feel.
2: Most of the oil was washed away, giving a refreshing feel.
1: Slightly sticky feeling due to residual oil content.

As is clear from Table 1, the cleansing compositions of Examples 1-12 all had excellent performance.

The cleansing composition of Comparative Example 1, which did not satisfy the requirements of the component (A) of the present invention, had a poor appearance of the cleansing composition mixed with water, and had poor rinsability.

The cleansing composition of Comparative Example 2, which did not satisfy the requirements of the components (A) and (B) of the present invention, had a poor appearance immediately after preparation and in a state in which water was mixed, and further had a significantly reduced detergency.

The cleansing composition of Comparative Example 3, which did not satisfy the requirements for component (B), had a bad appearance when mixed with water.

Regarding Comparative Examples 4 and 5, which did not satisfy the requirements of component (C), the appearance of the cleansing composition in the state of being contaminated with water was deteriorated. In Comparative Example 4, the rinsability was even worse.

The cleansing composition of Comparative Example 6, which did not satisfy the requirements for component (D), had significantly reduced detergency.

[Example 13: Formulation example of cleansing liquid]
As Example 13, Table 3 shows a formulation example of a specific cleansing liquid (cleansing composition) containing other ingredients. By preparing Example 13 at room temperature, the transparency of the appearance is maintained before and after mixing with water, and the cleansing product has excellent cleansing power even when water is mixed in, and has good rinsability when washed off. Got e-liquid.

[Example 14: Prescription example of cleansing gel]
As Example 14, Table 4 shows a formulation example of a specific cleansing gel (cleansing composition) containing other ingredients. By preparing Example 14 at room temperature, the transparency of the appearance is maintained before and after mixing with water, and the cleansing product has excellent cleansing power even when water is mixed in, and has good rinsability when washed off. got the gel.

Claims (3)

Characterized by containing 5 to 35% by mass of the following component (A), 5 to 20% by mass of the component (B), 10 to 35% by mass of the component (C), and 10 to 40% by mass of the component (D) A cleansing composition.
(A) Polyoxyethylene (5-30) mono fatty acid glyceryl (B) Polyoxyethylene (5-30) glycerin (C) Polyhydric alcohol having 2 to 6 carbon atoms (D) Oily liquid at 25°C component Furthermore, the cleansing composition according to claim 1, wherein HLB is 2 to 6 as component (E) and contains 5 to 25% by mass of a nonionic surfactant having a polyhydric alcohol skeleton. In addition, containing 0.1 to 10% by weight of an anionic surfactant as component (F), cleansing composition according to claim 1 or 2.