JP2022099406A - Oil-in-water type sunscreen cosmetic - Google Patents

Abstract

To provide an oil-in-water type sunscreen cosmetic having no squeaky feeling during application, excellent sense of use such as skin compatibility and emulsion stability while having good ultraviolet protection performance.SOLUTION: There is provided an oil-in-water type sunscreen cosmetic which comprises (A) 0.5 mass% or more of a higher fatty acid salt, (B) 0.5 mass% or more of a surfactant other than the component (A), (C) an organic ultraviolet absorber and (D) an oily agent other than the component (C), where the component (B) preferably includes one or two or more selected from an alkylsulfate ester salt, a fatty acid monoglyceride, a polyoxyalkylene alkyl ether type nonionic surfactant and a fatty acid polyethylene glycol type nonionic surfactant.SELECTED DRAWING: None

Description

The present invention relates to an oil-in-water sunscreen cosmetic, and more specifically, it has a good UV protection ability, does not have a squeaky feeling at the time of application, has an excellent feeling of use such as familiarity with the skin, and has stability over time. Regarding underwater oil type sunscreen cosmetics.

In recent years, underwater oil-type sunscreen cosmetics have been increasing due to their good usability. However, when a large amount of an ultraviolet absorber is blended, there is a problem of usability such as irritation, stickiness and squeaky depending on the person (for example, Patent Document 1).

JP-A-2007-246454

An object of the present invention is to solve the above-mentioned problems. Specifically, it has a good UV protection ability, does not have a squeaky feeling at the time of application, has an excellent feeling of use such as familiarity with the skin, and is stable over time. The purpose is to provide a certain underwater oil type sunscreen cosmetics.

As a result of diligent studies, the present inventors have made an oil-in-water emulsified cosmetic that can solve the above-mentioned problems by blending a higher fatty acid salt, a surfactant other than the higher fatty acid salt, an ultraviolet absorber, and a paste-like oil agent in combination. The present invention was completed by finding that

That is, the first invention of the present application is an oil-in-water sunscreen cosmetic containing the following components (A) to (D).
(A) Higher fatty acid salt 0.5% by mass or more (B) Surfactant other than (A) component 0.5% by mass or more (C) Organic ultraviolet absorber (D) (C) Oil agent other than component

Preferably, the component (B) is in water containing one or more selected from an alkyl sulfate ester salt, a fatty acid monoglyceryl, a polyoxyalkylene alkyl ether type nonionic surfactant, and a fatty acid polyethylene glycol type nonionic surfactant. It is an oil-type sunscreen cosmetic.

More preferably, the component (D) is a paste-like (semi-solid) oil at 25 ° C., and is one selected from petrolatum and dimer dilinoleate di (phytostearyl / isostearyl / cetyl / stearyl / behenyl). Or, it is an underwater oil-type sunscreen cosmetic containing two types.

The oil-in-water sunscreen cosmetic of the present invention has a good UV protection ability, but does not have a squeaky feeling when applied, has an excellent feeling of use such as familiarity with the skin, and is excellent in stability over time.

Hereinafter, the oil-in-water sunscreen cosmetic of the present invention will be described in detail.

In the present specification, "squeaky feeling" means that the skin is caught on the skin at the time of application, and "familiar with the skin" means that the skin does not feel sticky and has an appropriate moist feeling. Further, "stability over time" means that the emulsified state is maintained at 50 ° C. for one month without discoloration, odor change or separation.

The oil-in-water sunscreen cosmetic of the present invention contains the following components.
(A) Higher fatty acid salt 0.5% by mass or more (B) Surfactant other than (A) component 0.5% by mass or more (C) Organic ultraviolet absorber (D) (C) Oil agent other than component

<(A) Higher fatty acid salt>
The component (A) used in the present invention is a higher fatty acid salt. Higher fatty acid salts are used to reduce squeaky feeling and improve skin compatibility.

As the higher fatty acid, for example, those having 12 to 22 carbon atoms are preferable from the viewpoint of familiarity with the skin and stability over time, and those having 12 to 18 carbon atoms are more preferable. Specific examples include, for example, lauric acid, tridecylic acid, myristic acid, pentadecic acid, palmitic acid, margalic acid, stearic acid, araquinic acid, behenic acid, isocapric acid, isoperalgonic acid, isocapric acid, isoundercanic acid, isolauric acid, Examples thereof include isotridecylic acid, isomyristic acid, isopentadecylic acid, isopalmitic acid, isomarugalaric acid, isostearic acid, isononadecanoic acid, isoaraquinic acid, isoheneikosanoic acid and isobechenic acid.

Examples of the salt in the higher fatty acid salt include alkali metal salts such as sodium salt and potassium salt; and alkanolamine salts such as monoethanolamine salt, diethanolamine salt and triethanolamine salt.

The blending amount of the component (A) is 0.5% by mass or more, preferably 5.0% by mass or less, based on the mass of the oil-in-water sunscreen cosmetic. When it is 0.5% by mass or more, the emulsification stability is improved, and when it is 5.0% by mass or less, the feel during use is good.

<Surfactants other than (B) and (A) components>
The component (B) used in the present invention is a surfactant other than the component (A). The component (B) is used in combination with the component (A) to improve the stability over time.

Examples of the component (B) include an alkyl sulfate ester salt, a fatty acid monoglyceryl, a polyoxyalkylene alkyl ether type nonionic surfactant, and a fatty acid polyethylene glycol type nonionic surfactant.

The blending amount of the component (B) is 0.5% by mass or more, preferably 10% by mass or less, based on the mass of the oil-in-water sunscreen cosmetic. If it is 0.5% by mass or more, the emulsification stability is good, and if it is 10% by mass or less, stickiness is less likely to be felt.

<(C) Organic UV absorber>
The component (C) used in the present invention is an organic ultraviolet absorber, and may be either liquid or solid. The component (C) is used to protect the quality of skin sunburn and cosmetics from harmful ultraviolet rays.

Liquid organic UV absorbers include 2-ethylhexyl paramethoxycinnamic acid, 2-ethoxyethyl paramethoxycinnamate, isopropyl-diisopropyl cinnamic acid ester mixture of paramethoxycinnamic acid, and methylbis trimethoxycinnamic acid (trimethyl). Syroxy) Cyril isopentyl, amyl paradimethylamino acid benzoate, 2-ethylhexyl paradimethylamino acid benzoate, ethylene glycol salicylate, 2-ethylhexyl salicylate, benzyl salicylate, homomentyl salicylate, octocrylene, dimethyldiethylbenzalmaronate and the like. Of these, 2-ethylhexyl paramethoxycinnamate, 2-ethylhexyl salicylate, homomentyl salicylate, octocrylene, and dimethyldiethylbenzalmaronate are preferable, and 2-ethylhexyl paramethoxycinnamate, octocrylene, and dimethyldiethylbenzal are more preferable. It is malonate, more preferably 2-ethylhexyl paramethoxycinnamate. The liquid organic ultraviolet absorber may be contained alone or in combination of two or more as appropriate.

Examples of the solid organic ultraviolet absorber include 2- (4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester and 2,4-bis {[4- (2-ethylhexyloxy) -2-hydroxy] phenyl}. -6- (4-Methenylphenyl) -1,3,5-triazine, 2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5-triazine, 4-tert- Included are butyl-4'-methoxydibenzoylmethane and 2-ethylhexyl dimethoxybenzilidendioxoimidazolidine propionate. The solid organic ultraviolet absorber may be contained alone or in combination of two or more as appropriate.

Of these, preferably 2- (4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester, 2,4-bis {[4- (2-ethylhexyloxy) -2-hydroxy] phenyl} -6-( 4-methoxyphenyl) -1,3,5-triazine, 2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5-triazine, and 4-tert-butyl-4 '-Methoxydibenzoylmethane, more preferably 2- (4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester, 2,4-bis {[4- (2-ethylhexyloxy) -2-hydroxy] Phenyl} -6- (4-methoxyphenyl) -1,3,5-triazine, and 2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5-triazine. .. It is considered that the solid organic ultraviolet absorber in the present invention exists in a liquid state in cosmetics.

Examples of commercially available products of these components include ubinal MC80 (2-ethylhexyl paramethoxycinerate; manufactured by BASF), ubinal Aplus Granular (2- (4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester; BASF). , TINOSORBS (2,4-bis {[4- (2-ethylhexyloxy) -2-hydroxy] phenyl} -6- (4-methoxyphenyl) -1,3,5-triazine; manufactured by BASF) , Ubinal T-150 (2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5-triazine; manufactured by BASF), Softshade DH (dimethoxybenzilidendioxoimidazolidinepropion) Examples thereof include 2-ethylhexyl acid (manufactured by Ajinomoto Co., Ltd.), PARSOL1789 (4-tert-butyl-4'-methoxydibenzoylmethane; manufactured by DSM) and the like.

The blending amount of the component (C) is preferably 1 to 30% by mass, more preferably 5 to 20% by mass or less, based on the mass of the oil-in-water sunscreen cosmetic. If it is 1% by mass or more, a certain ultraviolet protection effect can be obtained, and if it is 30% by mass or less, good usability can be obtained without causing stickiness.

<Oil agents other than (D) and (C) components>
The component (D) used in the present invention is an oil agent other than the component (C). The component (D) is used to improve the familiarity with the skin.

Examples of the oil agent other than the component (C) include liquid oil and a paste-like (semi-solid) oil agent at 25 ° C., particularly preferably a paste-like (semi-solid) oil agent at 25 ° C., petrolatum and dimer linole. Di (phytostearyl / isostearyl / cetyl / stearyl / behenyl) acid can be mentioned.

The blending amount of the component (D) is preferably 0.1 to 10% by mass with respect to the mass of the oil-in-water sunscreen cosmetic. If it is 0.1% by mass or more, it feels good when used, and if it is 10% by mass or less, it is hard to feel stickiness.

<Other ingredients>
The oil-in-water sunscreen cosmetic of the present invention contains the above-mentioned components as essential constituents, but other components such as anionic surfactants are used in the composition as long as the object of the present invention is not impaired. Activators, amphoteric surfactants, nonionic surfactants, oils, polymer compounds, thickeners, powders (pigments, resins, pigments), preservatives, fragrances, moisturizers, physiologically active ingredients, salts, solvents , Antioxidants, chelating agents, pearlizing agents, neutralizing agents, pH regulators, insect repellents, enzymes and the like can be appropriately blended.

Further, the oil-in-water sunscreen cosmetic of the present invention may be appropriately blended with a physiologically active ingredient as long as the object of the present invention is not impaired. A physiologically active substance is a substance that gives some physiological activity to the skin when applied to the skin. For example, an antiaging agent, a tightening agent, an antioxidant, a moisturizing agent, a blood circulation promoter, an antibacterial agent, a bactericidal agent, and a drying agent. Examples thereof include agents, cooling sensitizers, warming sensitizers, vitamins, amino acids, wound healing promoters, stimulant relievers, painkillers, cell activators, enzyme components and the like.

The type of physiologically active ingredient that can be blended in the skin cosmetics of the present invention is not particularly limited, but it is preferable to use an extract derived from plant roots, stems, leaves, flowers, fruits, and seeds. Examples of extracts derived from plant roots, stems, leaves, flowers, fruits and seeds are, for example, Ashitaba extract, Avocado extract, Amacha extract, Artea extract, Arnica extract, Aloe extract, Itadori extract, Wikyo (fennel) extract, Agetsu. Extract, barley extract, oyster extract, oyster extract, cucumber extract, chamomile extract, carrot extract, kanzo extract, strawberry extract, kiwi extract, cucumber extract, kyonin extract, quince seed extract, brown sugar extract, rice bran extract, rice bran fermented extract, sugar cane extract, Satoukibi extract, perilla extract, shakuyaku extract, watermelon extract, sardine extract, sardine extract, sage extract, soybean extract, thyme extract, cha extract, camellia extract, tsubokusa extract, dokudami extract, tomato extract, nobara extract, hamamelis water, Examples thereof include rose extract, paris etaria extract, biwa extract, grape extract, hetima extract, button extract, hop extract, mukuroji extract, peach leaf extract, yagurumagiku extract, yokuinin extract, lemon extract, rosemary extract, and Roman chamomile extract.

Hereinafter, the present invention will be specifically described by exemplifying Examples and Comparative Examples, but the present invention is not limited to these Examples. Prior to the examples, the test method and the evaluation method adopted in each example will be described.

<UV protection>
(Evaluation method)
It was evaluated by the following in vitro SPF measurement.
The coating method is in accordance with ISO24443, and after coating each sample shown in Examples and Comparative Examples on a PMMA plate, the sample dried for 30 minutes is subjected to SPF measurement using an SPF analyzer (UV-2000S manufactured by Labsphere). rice field. For each sample, the average value of 9 points was calculated and judged according to the following evaluation criteria.
<Evaluation criteria>
◎: (Average SPF value) = 30 or more
◯: (Average SPF value) = 20 or more and less than 30
Δ: (Average SPF value) = 10 or more and less than 20
×: (Average SPF value) = less than 10

<Evaluation test for lack of squeaky feeling when familiar>
(Evaluation method)
Five specialized panels were evaluated for "no squeaky feeling when familiarized" when the underwater oil-type sunscreen cosmetic of the present invention was applied to the inner part of the forearm and lightly applied with a finger. The test results were judged according to the following evaluation criteria using the number of people who answered that "there is no squeaky feeling when familiar".
<Evaluation criteria>
◎: 4 or 5 panelists who admitted that they did not feel squeaky when they were familiar ○: 2 or 3 panelists who admitted that they did not feel squeaky when they were familiar △: 1 panelist who admitted that they did not feel squeaky when they were familiar Name ×: 0 panelists admitted that there is no squeaky feeling when familiar

<Skin familiarity evaluation test>
(Evaluation method)
Five specialized panels were evaluated for their "good skin compatibility" one minute after applying the oil-in-water sunscreen cosmetic of the present invention to the inner part of the forearm and lightly blending it with their fingers. The test results were judged according to the following evaluation criteria using the number of people who answered that "there is no stickiness at the time of application and it fits well on the skin". <Evaluation criteria>
⊚: 4 or 5 panelists who recognized that there was no stickiness at the time of application and had good skin compatibility ○: 2 or 3 panelists who recognized that there was no stickiness at the time of application and had good skin compatibility △: At the time of application 1 panelist admitted that it was not sticky and fits well on the skin ×: 0 panelists admitted that it was not sticky when applied and that it fits well on the skin

<Stability evaluation test over time>
After allowing to stand in a constant temperature bath at 50 ° C. for 1 month, the appearance condition was confirmed, and then the judgment was made according to the following evaluation criteria.
<Evaluation criteria>
◎: No change such as discoloration or odor is seen ○: Some changes are seen, but there is no problem with stability △: Changes are seen, but oil floating / separation does not occur ×: Separation

As is clear from Table 1, the oil-in-water sunscreen cosmetics of the examples using the ingredients of the present invention all had excellent performance. On the other hand, the comparative example lacking any of the essential components is inferior in any of the ultraviolet protection ability, the lack of squeaky feeling at the time of application and familiarity, and the good familiarity with the skin, and the object of the present invention can be achieved. I didn't.

Hereinafter, other prescription examples of the skin cosmetics of the present invention will be given. Regarding the underwater oil-type sunscreen cosmetics in the following prescription examples, we examined each item regarding the above-mentioned UV protection ability, no squeaky feeling at the time of application and familiarity, and good skin compatibility. It had excellent characteristics as in the examples and was good.

Prescription example 1 Oil-in-water sunscreen cosmetics (1) Stearic acid 4.0%
(2) Glyceryl stearate 5.0%
(3) Potassium hydroxide 0.3%
(4) 2-ethylhexyl paramethoxycinnamate 12.0%
(5) 2- (4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester 2.0%
(6) 2,4,6-Tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5-triazine 2.0%
(7) 2,4-Bis {[4- (2-ethylhexyloxy) -2-hydroxy] phenyl} -6- (4-methoxyphenyl) -1,3,5-triazine 2.0%
(8) Vaseline 3.0%
(9) Ceteallyl alcohol 4.0%
(10) BG 7.0%
(11) Octyldodecyl myristate 5.0%
(12) Isononyl isononanoate 1.0%
(13) Dimethylpolysiloxane 1.0%
(14) Hydrogenated lecithin 0.8%
(15) Phytosterol 0.08%
(16) Tocopherol 0.1%
(17) Ethanol 8.0%
(18) Sodium hyaluronate 0.2%
(19) Disodium edetate 0.01%
(20) Residual of purified water

(Production method) (1), (2), (4), (5) to (9) and (11) to (16) were heated to 80 ° C. and uniformly dissolved (Liquid A). (3), (10), (19) and (20) were heated to 80 ° C. and uniformly dissolved (Liquid B). Solution B was added to solution A and dispersed uniformly with a homomixer, then (17) and (18) were added and further dispersed uniformly with a homomixer to prepare a sunscreen O / W gel cream.

Claims (3)

An oil-in-water sunscreen cosmetic containing the following components (A) to (D).
(A) Higher fatty acid salt 0.5% by mass or more (B) Surfactant other than (A) component 0.5% by mass or more (C) Organic ultraviolet absorber (D) (C) Oil agent other than component The first aspect of claim 1 comprises the component (B) selected from one or more selected from an alkyl sulfate ester salt, a fatty acid monoglyceryl, a polyoxyalkylene alkyl ether type nonionic surfactant, and a fatty acid polyethylene glycol type nonionic surfactant. The listed underwater oil type sunscreen cosmetics. The component (D) is a paste-like (semi-solid) oil at 25 ° C., and contains one or two selected from petrolatum and dimer dilinoleate di (phytostearyl / isostearyl / cetyl / stearyl / behenyl). The oil-in-water sunscreen cosmetic according to claim 1 or 2.