JP5227467B2 - Transparent or translucent oil-in-water emulsified cosmetics - Google Patents

Abstract

[Problem] To provide an oil-in-water emulsified cosmetic in which transparency or translucency can be maintained by stabilizing a system in which a di-long-chain cationic surfactant has been blended, and which can be simply manufactured by a means such as mixing and stirring, regardless of the method used such as high-pressure emulsification. [Solution] Provided is a transparent or translucent oil-in-water emulsified cosmetic containing, (A) 0.1 to 2 mass % of a di-long-chain cationic surfactant, (B) 0.1 to 2 mass % of a non-ionic surfactant with an HLB of 10 to 18, (C) 0.01 to 2 mass % of an oil that is liquid at room temperature (25°C), (D) 1 to 20 mass % of a glycol, and (E) water, wherein the blending quantity of (C) component is not more than 0.65 (mass ratio) of the total blending quantity of the (A) component and the (B) component. The oil-in-water emulsified cosmetic need not contain menthol and/or camphor. No chosen drawing.

Description

  The present invention relates to an oil-in-water emulsified cosmetic that can stably maintain a system containing a di-long chain type cationic surfactant transparently or translucently.

  In water-based skin cosmetics such as lotion, those having a translucent to transparent appearance tend to be preferred (for example, see Patent Documents 1 and 2). In addition to its original function of moisturizing the skin and keeping it healthy, lotion has recently become menthol, camphor, etc. to provide a cool and cool feeling with the diversification of consumer preferences. The thing which mix | blended this cooling agent (cooling agent) has come to be calculated | required. Patent Document 3 discloses a technique for improving the cooling sensation / cooling sensation effect by using a cooling sensation agent (cooling agent) and a cationic surfactant in combination.

By the way, when skin cosmetics containing a cationic surfactant are applied particularly to the face and the like, a di-long-chain cationic surfactant is preferably used rather than a mono-long-chain cationic surfactant from the viewpoint of safety and the like. However, since di-long-chain cationic surfactants are hardly soluble in water, translucent or transparent lotions formulated with di-long-chain cationic surfactants can be easily used regardless of methods such as high-pressure emulsification. It was difficult to manufacture. Although Patent Document 1 discloses that either a mono-long-chain cationic surfactant or a di-long-chain cationic surfactant can be used as the cationic surfactant ([0027]), a method for preparing the same Shows a high pressure emulsification method under a pressure of 6 × 10 ⁷ to 18 × 10 ⁷ Pa ([0044]). Further, only examples using a mono long-chain cationic surfactant are specifically described as examples actually used in the examples ([0058]). The cationic surfactant specifically shown in Examples and the like in Patent Document 2 is only a mono-long-chain cationic surfactant.

Japanese Unexamined Patent Publication No. 2000-191503 (paragraph numbers [0027], [0044], [0058]) JP-A-6-271421 JP 2002-114649 A

  The present invention has been made in view of the above-described conventional circumstances, and can stably maintain transparency or translucency in a system containing a dilong-chain cationic surfactant, and can be applied to a method such as high-pressure emulsification. An object of the present invention is to provide an oil-in-water emulsified cosmetic that can be easily produced by means such as mixing and stirring.

  In order to solve the above problems, the present invention provides (A) a di-long cationic surfactant in an amount of 0.1 to 2% by mass, and (B) a nonionic surfactant of HLB 10 to 18 in an amount of 0.1 to 2% by mass. %, (C) 0.01-2% by mass of liquid oil at room temperature (25 ° C.), (D) 1-20% by mass of glycols, and (E) water, Provided is a transparent to translucent oil-in-water emulsified cosmetic, the amount of which is 0.65 or less (mass ratio) with respect to the total amount of component (A) and component (B).

  The present invention also provides the oil-in-water emulsion cosmetic, wherein the component (A) is a compound represented by the following formula (I) and / or (II).

[In the formula (I), R ₁ CO independently represents an aliphatic acyl group having 12 to 22 carbon atoms and 0 to 3 double bonds; p represents an integer of 1 to 3; R ₂ represents a methyl group or a group — (CH ₂ ) _p —OH (wherein p is as defined above); X represents a halogen atom, methosulfate, or methophosphate. ]

[In the formula (II), R ₃ each independently represents an alkyl group having 12 to 22 carbon atoms and 0 to 3 double bonds; R ₄ each independently represents a carbon atom number; 1 to 3 represents an alkyl group having no double bond; Y represents a halogen atom, methosulfate, or methophosphate. ]

  In the present invention, the component (D) is 1,3-butylene glycol, dipropylene glycol, polyethylene glycol, ethylene glycol, diethylene glycol, triethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, isoprene glycol, Among 1,4-butylene glycol, neopentyl glycol, 1,2-pentanediol, 1,5-pentanediol, 1,6-hexanediol, 1,4-cyclohexanedimethanol, polypropylene glycol, and polytetramethylene glycol The oil-in-water emulsified cosmetic is one or more selected from

  Moreover, this invention provides the said oil-in-water type emulsified cosmetics whose L value is 85 or more.

  Moreover, this invention provides the said oil-in-water type emulsified cosmetics whose emulsion particle diameter is 200 nm or less.

  The present invention also provides the oil-in-water emulsion cosmetic further comprising menthol and / or camphor.

  According to the present invention, a system containing a di-long-chain cationic surfactant can be stably maintained transparent or translucent, and can be easily used by means such as mixing and stirring without using a method such as high-pressure emulsification. An oil-in-water emulsified cosmetic that can be produced is provided.

  Hereinafter, the present invention will be described in detail. In the following, POE represents polyoxyethylene, POP represents polyoxypropylene, and PEG represents polyethylene glycol.

  As the di-long-chain cationic surfactant that is the component (A), a di-long-chain cationic surfactant represented by the following formula (I) and / or (II) is preferably used.

[In the formula (I), R ₁ CO independently represents an aliphatic acyl group having 12 to 22 carbon atoms and 0 to 3 double bonds; p represents an integer of 1 to 3; R ₂ represents a methyl group or a group — (CH ₂ ) _p —OH (wherein p is as defined above); X represents a halogen atom, methosulfate, or methophosphate. ]

[In the formula (II), R ₃ each independently represents an alkyl group having 12 to 22 carbon atoms and 0 to 3 double bonds; R ₄ each independently represents a carbon atom number; 1 to 3 represents an alkyl group having no double bond; Y represents a halogen atom, methosulfate, or methophosphate. ]

  The di-long-chain cationic surfactant represented by the above formula (I) is preferably a coconut oil fatty acid ester quat halide or methosulphate. Specific examples include dicocoylethylhydroxyethylmonium methosulfate (commercially available product such as “DEHYQUART L80” (manufactured by Cognis Japan)). However, it is not limited to these examples.

  Examples of the di-long-chain cationic surfactant represented by the above formula (II) include dibehenyldimethylammonium chloride and distearyldimethylammonium chloride (“cation DSV” (manufactured by Sanyo Chemical Industries, Ltd.) as a commercial product) ), Dicetyldimethylammonium chloride, dicetostearyldimethylammonium chloride, distearyldimethylammonium methosulfate, dibehenyldimethylammonium methosulfate, dicetyldimethylammonium methosulfate, dicetostearyldimethylammonium methosulfate, and the like. However, it is not limited to these examples.

  (A) The compounding quantity of a component is 0.1-2 mass% in the cosmetics whole quantity of this invention. Preferably it is 0.1-1 mass%. If it is less than 0.1% by mass, the feeling of improving the cooling sensation effect is lost. On the other hand, if it exceeds 2% by mass, the emulsion stability during storage becomes poor, which is not preferable. (A) component can use 1 type (s) or 2 or more types.

  (B) A component is a nonionic surfactant of HLB10-18. HLB is the following number 1

(However, MW represents the molecular weight of the hydrophilic base, and MO represents the molecular weight of the lipophilic base)
It is calculated by the Kawakami equation represented by When the HLB is less than 10 or more than 18, it is difficult to reduce the emulsion particle size.

Examples of the component (B) include hexaglyceryl monolaurate (HLB14.5), hexaglyceryl monomyristate (HLB11), decaglyceryl monolaurate (HLB15.5), decaglyceryl monomyristate (HLB14.0), monostearin. Decaglyceryl acid (HLB12.0), decaglyceryl monoisostearate (HLB12.0), decaglyceryl monooleate (HLB12.0), decaglyceryl distearate (HLB9.5), decaglyceryl diisostearate (HLB10.0) Polyglycerol fatty acid esters such as;
POE glycerin fatty acid esters such as POE (15) glyceryl monostearate (HLB13.5), POE (15) glyceryl monooleate (HLB14.5);
Mono palm oil fatty acid POE (20) sorbitan (HLB16.9), monopalmitic acid POE (20) sorbitan (HLB15.6), monostearic acid POE (20) sorbitan (HLB14.9), tristearic acid POE (20) sorbitan (HLB10.5), monoisostearic acid POE (20) sorbitan (HLB15.0), monooleic acid POE (20) sorbitan (HLB15.0), monooleic acid POE (6) sorbitan (HLB10.0), triolein POE sorbitan fatty acid esters such as acid POE (20) sorbitan (HLB11.0);
Monolauric acid POE (6) sorbite (HLB15.5), tetrastearic acid POE (60) sorbitol (HLB13.0), tetraoleic acid POE (30) sorbitol (HLB11.5), tetraoleic acid POE (40) sorbitol ( PLB sorbite fatty acid esters such as HLB 12.5), tetraoleic acid POE (60) sorbite (HLB14.0);
POE (10) lanolin (HLB12.0), POE (20) lanolin (HLB13.0), POE (30) lanolin (HLB15.0), POE (5) lanolin alcohol (HLB12.5), POE (10) lanolin POE lanolin, lanolin alcohol, beeswax derivatives such as alcohol (HLB15.5), POE (20) lanolin alcohol (HLB16.0), POE (40) lanolin alcohol (HLB17.0);
POE (20) castor oil (HLB10.5), POE (40) castor oil (HLB12.5), POE (50) castor oil (HLB14.0), POE (60) castor oil (HLB14.0), POE ( 30) hydrogenated castor oil (HLB11.0), POE (40) hydrogenated castor oil (HLB13.5), POE (60) hydrogenated castor oil (HLB14.0), POE (80) hydrogenated castor oil (HLB16.5), POE castor oil / hardened castor oil such as POE (40) hydrogenated castor oil (100) hydrogenated castor oil (HLB16.5);
POE (10) phytosterol (HLB12.5), POE (20) phytosterol (HLB15.5), POE (30) phytosterol (HLB18.0), POE (30) POP (7) phytosterol (HLB13.5), POE ( 25) POE sterols and hydrogenated sterols such as phytostanol (HLB14.5) and POE (30) cholestanol (HLB17.0);
POE (4.2) lauryl ether (HLB11.5), POE (9) lauryl ether (HLB14.5), POE (5.5) cetyl ether (HLB10.5), POE (7) cetyl ether (HLB11.5) ), POE (10) cetyl ether (HLB13.5), POE (15) cetyl ether (HLB15.5), POE (20) cetyl ether (HLB17.0), POE (23) cetyl ether (HLB18.0), POE (4) stearyl ether (HLB9.0), POE (20) stearyl ether (HLB18.0), POE (7) oleyl ether (HLB10.5), POE (10) oleyl ether (HLB14.5), POE ( 15) oleyl ether (HLB16.0), POE (20) oleyl ether HLB17.0), POE (50) oleyl ether (HLB18.0), POE (10) behenyl ether (HLB10.0), POE (20) behenyl ether (HLB16.5), POE (30) behenyl ether (HLB18. 0), POE (4) ( C 12 ~C 15) alkyl ether (HLB10.5), POE (10) (C 12 ~C 15) alkyl ether (HLB15.5), POE (5) 2 alkyl ether ( POE alkyl ethers such as HLB10.5), POE (7) secondary alkyl ether (HLB12.0), POE (9) alkyl ether (HLB13.5), POE (12) alkyl ether (HLB14.5);
POE (10) POP (4) cetyl ether (HLB10.5), POE (20) POP (8) cetyl ether (HLB12.5), POE (20) POP (6) decyltetradecyl ether (HLB11.0), POE • POP alkyl ethers such as POE (30) POP (6) decyltetradecyl ether (HLB12.0);
PEG (10) monolaurate (HLB12.5), PEG (10) monostearate (HLB11.0), PEG monostearate (25) (HLB15.0), PEG monostearate (40) (HLB17.5) PEG monostearate (45) (HLB18.0), PEG monostearate (55) (HLB18.0), monooleic acid PEG (10) (HLB11.0), distearic acid PEG (HLB16.5), etc. PEG fatty acid esters;
PEG (8) glyceryl isostearate (HLB10.0), PEG (10) glyceryl isostearate (HLB10.0), PEG (15) glyceryl isostearate (HLB12.0), PEG (20) glyceryl isostearate (HLB13.0) ), PEG (25) glyceryl isostearate (HLB14.0), PEG glyceryl isostearate (30) (HLB15.0), PEG (40) glyceryl isostearate (HLB15.0), PEG (50) glyceryl isostearate (HLB16) .0), POE glyceryl isostearates such as PEG (60) glyceryl isostearate (HLB16.0);
Etc. are exemplified. However, it is not limited to these examples.

  Among these, POE sterols and hydrogenated sterols such as POE phytosterol, POE phytostanol, and POE cholestanol are particularly preferred in the present invention from the viewpoint of stability during storage. Examples of commercially available products include “Nikkor BPS-10”, “Nikkor BPS-20”, “Nikkor BPS-30”, and “Nikkor BPS-3007” (all of which are manufactured by Nikko Chemicals Co., Ltd.). (B) component can use 1 type (s) or 2 or more types.

  (B) The compounding quantity of a component is 0.1-2 mass% in the cosmetics whole quantity of this invention. Preferably it is 0.1-1 mass%. If it is less than 0.1% by mass, it is difficult to adjust the emulsified particle diameter to 200 nm or less, while if it exceeds 2% by mass, stickiness is produced in the feeling of use.

  The oil component that is liquid at room temperature (25 ° C.) as the component (C) is not particularly limited as long as it can be generally used in cosmetics. For example, fats and oils, higher fatty acids, ester oils, hydrocarbon oils Conventionally used in cosmetics such as higher alcohols and silicone oils can be used. The following are illustrated as specific examples.

  Examples of fats and oils include linseed oil, camellia oil, macadamia nut oil, corn oil, olive oil, avocado oil, sasanqua oil, castor oil, safflower oil, kyounin oil, cinnamon oil, jojoba oil, grape oil, sunflower oil, almond oil Rapeseed oil, sesame oil, wheat germ oil, rice germ oil, rice bran oil, cottonseed oil, soybean oil, peanut oil, tea seed oil, evening primrose oil and the like.

  Examples of higher fatty acids include heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, pentadecanoic acid, heptadecanoic acid, nonadecanoic acid, isostearic acid, oleic acid, linoleic acid, linolenic acid, arachidonic acid and the like.

  Examples of ester oils include pentaerythritol tetraoctanoate, cetyl octanoate, hexyl laurate, isopropyl myristate, octyldodecyl myristate, octyl palmitate, isopropyl isostearate, octyl isopalmitate, isodecyl oleate, and ethylhexane. Examples include cetyl acid.

  Examples of the hydrocarbon oil include liquid paraffin, squalane, squalene, paraffin, isoparaffin, octane, decane, dodecane, isododecane, hexadecane, and isohexadecane.

  Examples of the higher alcohol include octyl alcohol, isostearyl alcohol, oleyl alcohol, and the like.

  Examples of the silicone oil include chain silicones such as dimethylpolysiloxane, methylphenylpolysiloxane, and methylhydrogenpolysiloxane, and cyclic silicones such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane. Can be mentioned.

  In the present invention, ester oils, higher alcohols, hydrocarbon oils and the like are particularly preferably used from the viewpoint of good emulsification. (C) A component can use 1 type (s) or 2 or more types.

  The compounding quantity of (C) component is 0.01-2 mass% in the cosmetics whole quantity of this invention. Preferably it is 0.1-1 mass%. If it is less than 0.01% by mass, emulsification cannot be carried out and the component (A) may be precipitated, which is not preferable.

  Moreover, in this invention, it mix | blends so that (C) component may be 0.65 or less (mass ratio) with respect to the total compounding quantity of (A) component and (B) component. If it exceeds 0.65, the stability during storage is inferior, the particle size of the emulsified particles becomes large, and it is impossible to obtain translucency or transparency. In addition, the lower limit value of the blending ratio of the component (C) with respect to the total blending amount of the component (A) and the component (B) is not particularly limited, but is stably dispersed while containing the component (A) that is hardly soluble in water. In view of the above, it is preferably 0.05 or more, more preferably 0.1 or more, and particularly preferably 0.2 or more.

  The glycol as component (D) is not particularly limited as long as it can be generally used in cosmetics. For example, 1,3-butylene glycol, dipropylene glycol, polyethylene glycol, ethylene glycol, diethylene glycol, Triethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, isoprene glycol, 1,4-butylene glycol, neopentyl glycol, 1,2-pentanediol, 1,5-pentanediol, 1,6- Examples include hexanediol, 1,4-cyclohexanedimethanol, polypropylene glycol, polytetramethylene glycol and the like. Of these, 1,3-butylene glycol, dipropylene glycol and the like are particularly preferably used. (D) A component can use 1 type (s) or 2 or more types.

  (D) The compounding quantity of a component is 1-20 mass% in the cosmetics whole quantity of this invention. Preferably it is 5-15 mass%. If the amount is less than 1% by mass, it is difficult to reduce the emulsion particle size. On the other hand, if it exceeds 20% by mass, the feeling of use such as stickiness may be impaired.

  (E) A component is water.

  In the present invention, the above components (A) to (E) are essential components, and by blending these components in the specific blending amount range, the (A) component which is a poorly water-soluble component can be obtained without using a high-pressure emulsification method or the like. And can be solubilized in an oil-in-water emulsified solvent to provide a stable transparent or translucent base.

  In the cosmetics of the present invention, “transparent to translucent” means that the L value, which is an index of transparency, is 85 or more. The “L value” can be measured with a color difference meter [for example, COLOR-EYE 7000A (manufactured by Gretag Macbeth)]. The closer the L value is to 100, the higher the transparency.

  Moreover, in the translucent or transparent oil-in-water emulsified cosmetic of the present invention, the particle size of the emulsified particles is preferably 200 nm or less, more preferably 100 nm or less.

  In the present invention, in addition to the above essential components, a cooling sensation agent (cooling agent) can be blended for the purpose of improving the cooling sensation / cooling effect. Menthol and camphor are preferably used as the cooling sensation agent (cooling agent). When a cooling sensation agent (cooling agent) is blended, the blending amount is preferably about 0.001 to 1.0% by mass, more preferably 0.01 to 0.5% by mass with respect to the total amount of the cosmetic. .

  Production of the cosmetic of the present invention does not require means such as high-pressure emulsification as in the prior art, and can be produced by means such as mixing and stirring. For example, the components (A) to (C) are heated and mixed and dissolved at a temperature of about 70 ° C. (oil phase). Subsequently, after adding and stirring to this oil phase the mixed water phase which consists of (D) component and a part of (E) component, it can manufacture by adding and mixing the remainder of (E) component.

  In addition, the blending ratio (mass ratio) of both components in the mixed aqueous phase composed of the component (D) and the component (E) is (D) component: (E) from the viewpoint of ease of emulsification. Component (partial) = 6: 4 to 9: 1 is preferable, and 7: 3 to 8: 2 is more preferable. By using a mixed aqueous phase in which the component (E) (part) is added to the component (D), it becomes easy to adjust the fine emulsified particle size. If the (E) component (total amount) is added after adding only the (D) component instead of the mixed aqueous phase consisting of the (D) component and the (E) component (part), fine emulsified particles cannot be obtained. .

  Further, a uniform system is prepared by dissolving and mixing a part of the component (E) in the components (A) to (D) [the preferred mass ratio of the component (E) to the component (D) is the same as described above] at a temperature of about 70 ° C. The cosmetic of the present invention in which the emulsified particles are refined may be produced by adding and mixing the remainder of the component (E).

  In the cosmetics of the present invention, in addition to the above components, a moisturizing agent, oil (solid fats, waxes, etc.), powder components, Water-soluble polymers (natural, semi-synthetic, synthetic), thickeners, UV absorbers, sequestering agents, lower alcohols (ethanol, etc.), saccharides (monosaccharides, oligosaccharides, polysaccharides), organic amines, pH adjusters In addition, vitamins, antioxidants, antioxidant assistants, other components that can be blended, and the like can be blended as necessary. However, it is not limited to these examples.

  The cosmetic dosage form of the present invention is not particularly limited as long as it can be applied to the skin, and examples thereof include skin lotion, lotion, and an impregnating liquid to be impregnated into a sheet-like base.

  Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited thereto. Unless otherwise specified, all the amounts are mass%.

[Average particle size]
The average particle size of the emulsified droplets was measured as it was without diluting the sample using a Zetasizer NanoZS (manufactured by sysmex).

[L value (transparency)]
The sample immediately after the preparation was measured using COLOR-EYE 7000A (manufactured by Gretag Macbeth), and the L value was calculated with transparency of distilled water as 100 as a control. L values of less than 85 to 98 were translucent, and 98 to 100 were transparent.

[Stability during storage (L value change)]
The sample was allowed to stand at 0 ° C., 25 ° C., and 50 ° C. for 1 month, and the L value was measured. The difference from the L value immediately after production was determined, and the average value was evaluated according to the following evaluation criteria.
(Evaluation criteria)
◎: L value change is within ± 5 ○: L value change is more than ± 5 to ± 10
Δ: L value change is more than ± 10 to ± 15
-: L value (initial value) is less than 85

(Examples 1-6, Comparative Example 1)
Samples shown in Table 1 below were prepared. Using these samples, the average emulsified particle diameter, L value (transparency), and stability during storage (change in L value) were evaluated by the above evaluation methods. The results are shown in Table 1.
(Manufacturing method)
(1) to (10) were heated and mixed and dissolved at 70 ° C. The mixed water phase which is a part (8: 2 mass ratio) of (11) and (12) was added here, and it was 65 degreeC. After sufficiently stirring this, the remainder of (12) was added and mixed to prepare a sample.

  As is clear from the results in Table 1, the cosmetics of the present invention (Examples 1 to 6) had an emulsified particle size of 200 nm or less, a high L value, and excellent storage stability. On the other hand, in Comparative Example 1 using a nonionic surfactant having an HLB value of less than 10, the emulsified particle size was large, the L value was low, and the storage stability was poor.

(Examples 7-9, Comparative Examples 2-3)
Samples shown in Table 2 below were prepared. Using these samples, the average emulsified particle size, L value (initial value), and storage stability were evaluated by the above evaluation methods. The results are shown in Table 2.
(Manufacturing method)
(1) to (4) were heated and mixed and dissolved at 70 ° C. The mixed water phase which is a part (8: 2 mass ratio) of (5) and (6) was added here, and it was set to 65 degreeC. After sufficiently stirring this, the remainder of (6) was added and mixed to prepare a sample.

  As is clear from the results in Table 2, the effects of the present invention were obtained in Examples 7 to 9 where (C) component / [(A) component + (B) component] (mass ratio) was 0.65 or less. . On the other hand, the effects of the present invention were not obtained in Comparative Examples 2 and 3 with the mass ratio exceeding 0.65.

(Examples 10 to 11)
Samples shown in Table 3 below were prepared. Using these samples, the average emulsified particle size, L value (initial value), and storage stability were evaluated by the above evaluation methods. The results are shown in Table 3.
(Manufacturing method)
(1) (Remainder) to (5) were mixed and dissolved. (6) to (9) were mixed and dissolved, and added to the mixture of (1) (remainder) to (5) (referred to as phase A). Next, (10) to (13) are heated and mixed, dissolved at 70 ° C., and a mixed aqueous phase that is a part of (14) and (1) (mass ratio of 8: 2) is added thereto. C. After sufficiently stirring this and confirming that a uniform phase was obtained, another part of (1) was further added and diluted (referred to as B phase). Phase B was cooled to around 45 ° C. by dilution with water, and formation of fine particles was confirmed. Next, a sample was prepared by adding and mixing B phase to A phase.

  As is clear from the comparison of the results of Example 10 and Example 11 shown in Table 3, a translucent or transparent sample was obtained even when a cooling sensation agent (cooling agent) was blended. Further, the cooling sensation / cooling effect of Example 10 was excellent.

(Comparative Examples 4-5)
Samples shown in Table 4 below were prepared. These samples are emulsion samples in which a dilong chain cationic surfactant is blended with a system having a high oil content similar to Example 2 in “Patent Document 1” listed in the section of the prior art. Using these samples, the average emulsified particle diameter and appearance (visual observation: ○: transparent to translucent, x: cloudiness) were evaluated. The results are shown in Table 4.
(Manufacturing method)
(1) to (6) were heated and mixed and dissolved at 70 ° C. (7) was added and stirred here. What melt | dissolved (8) in (9) was added here, and it stirred at 70 degreeC (comparative example 5).
In Comparative Example 4, high-pressure emulsification was performed under the pressure of 55 MPa after the stirring.

  As is clear from the results in Table 4, in the conventional emulsion using a dilong chain cationic surfactant in a system with a large amount of oil, a translucent to transparent appearance cannot be obtained only by the stirring and mixing step (Comparative Example). 5) A translucent to transparent appearance was finally obtained by high-pressure emulsification (Comparative Example 4).

  Further examples are shown below.

(Example 12: Transparent lotion)
(Mixed component) (mass%)
(1) Purified water [(E) component] Residue (2) EDTA-2Na · 2H ₂ O 0.01
(3) Sodium citrate 0.02
(4) Glycerin 3.0
(5) Ethanol 8.0
(6) Phenoxyethanol 0.5
(7) Menthol 0.04
(8) Camphor 0.02
(9) 1,3-butylene glycol [component (D)] 8.0
(10) Isostearyl alcohol [component (C)] 0.2
(11) Octyl palmitate [component (C)] 0.2
(12) Dicocoylethylhydroxyethylmonium methosulfate [component (A)]
(DEHYQUAL L80; manufactured by Cognis Japan) 0.56
(13) POE (10) phytosterol [component (B)] 0.4
<Manufacturing method>
1. (1) (Remainder) to (8) were mixed and dissolved at 25 ° C.
2. (1) (Part) and (9) to (13) were dissolved and mixed at 75 ° C.
3. 2. 1. Was gradually added to the mixture and stirred and mixed.
The obtained lotion had emulsified particles of 28 nm and an L value of 98. In addition, the storage stability was good.

(Example 13: Transparent lotion)
(Mixed component) (mass%)
(1) Purified water [(E) component] Residue (2) EDTA-2Na · 2H ₂ O 0.01
(3) Citric acid 0.01
(4) Sodium citrate 0.04
(5) Glycerin 3.0
(6) Ethanol 8.0
(7) Phenoxyethanol 0.5
(8) Dipropylene glycol [component (D)] 8.0
(9) Isostearyl alcohol [component (C)] 0.2
(10) Octyl palmitate [component (C)] 0.2
(11) Distearyldimethylammonium chloride [component (A)] 0.4
(12) POE (10) phytosterol [component (B)] 0.4
<Manufacturing method>
1. (1) (Remainder) to (7) were mixed and dissolved at 25 ° C.
2. (1) (Part) and (8) to (12) were dissolved and mixed at 75 ° C.
3. 2. 1. Was gradually added to the mixture and stirred and mixed.
The obtained lotion had emulsified particles of 28 nm and an L value of 98. In addition, the storage stability was good.

  According to the present invention, a system containing a di-long-chain cationic surfactant can be stably maintained transparent or translucent, and can be easily used by means such as mixing and stirring without using a method such as high-pressure emulsification. An oil-in-water emulsified cosmetic that can be produced is provided.

Claims (5)

(A) 0.1-2% by mass of a dilong-chain cationic surfactant represented by the following formula (I) and / or (II), and (B) 0.1% of a nonionic surfactant of HLB 10-18. ~ 2% by mass, (C) 0.01-2% by mass of liquid oil at room temperature (25 ° C), 1-20% by mass of (D) glycols, and (E) water, (C) A transparent to translucent oil-in-water emulsified cosmetic, wherein the compounding amount of the component is 0.65 or less (mass ratio) with respect to the total compounding amount of the component (A) and the component (B).

[In the formula (I), R ₁ CO independently represents an aliphatic acyl group having 12 to 22 carbon atoms and 0 to 3 double bonds; p represents an integer of 1 to 3; R ₂ represents a methyl group or a group — (CH ₂ ) _p —OH (wherein p is as defined above); X represents a halogen atom, methosulfate, or methophosphate. ]

[In the formula (II), R ₃ each independently represents an alkyl group having 12 to 22 carbon atoms and 0 to 3 double bonds; R ₄ each independently represents a carbon atom number ; 1 to 3 represents an alkyl group having no double bond; Y represents a halogen atom, methosulfate, or methophosphate. ] (D) Component is 1,3-butylene glycol, dipropylene glycol, polyethylene glycol, ethylene glycol, diethylene glycol, triethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, isoprene glycol, 1,4-butylene One selected from glycol, neopentyl glycol, 1,2-pentanediol, 1,5-pentanediol, 1,6-hexanediol, 1,4-cyclohexanedimethanol, polypropylene glycol, and polytetramethylene glycol or two or more kinds, according to claim 1 Symbol placement of the oil-in-water emulsion cosmetic. The oil-in-water emulsified cosmetic according to claim 1 or 2 , wherein the L value is 85 or more. The oil-in-water emulsified cosmetic according to any one of claims 1 to 3 , wherein the emulsified particle diameter is 200 nm or less. The oil-in-water emulsified cosmetic according to any one of claims 1 to 4 , further comprising menthol and / or camphor.