JP6022405B2 - Cosmetics - Google Patents

Description

  The present invention uses one or more of ester oils selected from ethyl oleate, ethyl linoleate, and isopropyl linoleate, while stably blending a solid organic ultraviolet absorber, The present invention relates to a cosmetic provided with sufficient preservative effect with a small amount of preservative.

  Among the ultraviolet rays falling on the ground, the wavelength region called UVA (320 to 400 nm) causes skin aging and the like, and the wavelength region called UVB (280 to 320) is said to cause skin cancer and the like. Protecting the skin from skin is one of the important functions of cosmetics.

  Therefore, in order to impart a UV protection effect to cosmetics, inorganic UV protection agents such as titanium oxide and zinc oxide, organic UV absorbers such as cinnamic acid, and the like have been widely used (non-patent literature). 1-3).

  In recent years, general consumers have become more interested in UV protection, and cosmetics with stronger UV protection are demanded. In particular, UVA protection that causes skin aging and the like is strongly demanded from the viewpoint of beauty. ing.

  Zinc oxide is widely used as an inorganic ultraviolet protective agent in order to impart UVA protection ability to cosmetics, but its use is not preferred in Europe due to concerns about environmental impact caused by elution of zinc oxide.

  It is also possible to provide UVA protection by blending pigment-grade titanium oxide, but the transparency is impaired and the preparation is unsuitable for everyday use.

  Because of these problems, recently, there is a tendency to enhance the UV protection ability of cosmetics with organic UV absorbers rather than inorganic UV protection agents.

  Many organic UV absorbers that absorb UVA are in a solid state at room temperature, and such solid organic UV absorbers are difficult to dissolve.

  Although they are known to dissolve easily in highly polar ester oils, there are not many ester oils suitable as solvents.

  In addition, depending on the combination, there are many ester oils that reduce the ultraviolet absorbing ability of the solid organic ultraviolet absorber over time, and the combinations that can be used are limited.

  Furthermore, high blending of highly polar ester oil is also necessary in order to blend highly solid organic ultraviolet absorbers.

  However, when a highly polar ester oil is blended in a high amount, there is a problem in that the preservative efficacy of the cosmetic is reduced, and the preservative efficacy commensurate with the content of the preservative cannot be imparted.

  A method of increasing the preservative may be considered in order to provide sufficient preservation effect, but increasing the preservative may cause irritation to the skin or destabilization of the emulsification.

  In general, as preservatives used in cosmetics, parabens such as methylparaben are mixed in a small amount, but in recent years, paraben-free preparations that do not use parabens tend to be preferred.

  Therefore, in order to stably dissolve the solid organic ultraviolet absorber and to impart sufficient storage effect with a small amount of preservative, it is necessary to select an appropriate swell oil.

  In Patent Document 1, as a solvent for a solid organic ultraviolet absorber, diisopropyl sebacate, glyceryl tri-2-ethylhexanoate, pentaerythrityl tetra-2-ethylhexanoate, diethylhexyl succinate, cetyl 2-ethylhexanoate, Highly polar ester oils such as alkyl benzoates and isononanoyl isononanoate are used.

  In Patent Document 2, dineopentanoic acid tripropylene glycol, tetra-2-ethylhexanoic acid pentaerythrityl and the like are used as a solvent for a solid organic ultraviolet absorber.

  However, in these two patent documents, a large amount of preservative is necessary to give sufficient preservation effect, and there is concern about irritation to skin and destabilization of emulsification.

  On the other hand, in addition to increasing the amount of preservatives, in Patent Document 3, alkanediol and chelating agent are combined in combination with alkanediol and isothiocyanates in Patent Document 3 in order to impart high storage efficacy to the preparation. However, the effect of the oil agent on these preservatives is not taken into consideration, and sufficient preservative effect cannot be obtained when a highly polar ester oil is highly blended.

  In Patent Document 5, alkanediol and parabens are used in combination to provide high storage efficacy. However, considering the current situation in which paraben-free is preferred, it lacks versatility.

  Therefore, there is a demand for the development of a preparation that can be stably blended with a solid organic UV absorber in order to exert an excellent UV protection effect, can be paraben-free, and can provide sufficient storage efficacy with a small amount of preservatives. .

JP 2010-59136 A JP 2009-242314 A JP 2004-307484 A JP 2004-307484 A JP 2010-180213 A

FRAGRANCE JOURNAL, 27 (5), page 25-30 (1999) J. et al. SOC. COSMET. CHEM. JAPAN, VOL. 31, NO. 4, page 373-384 (1997) FRAGRANANCE JOURNAL, 28 (5), page 26-32 (2000)

  The problem to be solved by the invention of the present application is to provide a cosmetic that is stably paraffin-free and has a sufficient preservative effect with a small amount of preservative, while stably incorporating a solid organic ultraviolet absorber. .

In such a situation, the present inventors have conducted intensive research, and as a result, the following components 1) to 4);
1) 5% by weight or more of one or more ester oils selected from ethyl oleate, ethyl linoleate, and isopropyl linoleate 2) 0.5 to 10% by weight of a solid organic ultraviolet absorber 3 ) 0.5 to 3% by weight of alkanediol
4) 1 to 5% by weight of ethanol
The present invention completed the present invention by discovering that the cosmetics containing the organic matter can stably dissolve the solid organic ultraviolet absorber, but the reduction of the storage effect by the polar oil can be alleviated and sufficient storage effect can be imparted. .

  Examples of the ester oil used in the present invention include ethyl oleate, ethyl linoleate, and isopropyl linoleate, and one or more of these are selected from these.

  In order to give cosmetics a fresh feeling of use without feeling sticky due to ester oil, the blending amount necessary for dissolving a solid ultraviolet absorber having a sufficient UVA protection ability is 5% by weight or more. The blending amount is preferably 25% by weight or less.

  Specific examples of ester oils to be used include Floracac 10 (manufactured by Floratec), NIKKOL EOO (manufactured by Nikko Chemicals), NIKKOL VE-F (Nikko Chemicals), NIKKOL VE-IP (manufactured by Nikko Chemicals), CLEARBLIGHT E- 81S (manufactured by NOF Corporation), NOFABLE 85S (manufactured by NOF Corporation) and the like can be mentioned, but are not particularly limited thereto.

  Further, in order to improve the feeling of use, the stability of the preparation, and the UVB protection ability, other ester oils may be used in combination as long as the effects of the present invention are not impaired.

  Specifically, isopropyl myristate, cetyl octanoate, octyldodecyl myristate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyl decyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, stearin Isocetyl acid, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di2-ethylhexanoate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, di Glycerin 2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, tetra-2-ethylene Pentaerythritol trihexanoate, glyceryl tri-2-ethylhexanoate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, tridecyl isononanoate, isononyl isononanoate, diethylhexyl naphthalene dicarboxylate, benzoate Acid (C12-15) alkyl, cetearyl isononanoate, tri (caprylic acid / capric acid) glycerin, (dicaprylic acid / capric acid) butylene glycol, glyceryl trimyristate, tri-2-heptylundecanoic acid glyceride, castor Oil fatty acid methyl ester, oleyl oleate, cetostearyl alcohol, acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl-L Glutamic acid-2-octyldodecyl ester, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-ethylhexyl palmitate, 2-hexyldecyl palmitate, adipic acid 2 -Hexyldecyl, diisopropyl sebacate, di-2-ethylhexyl succinate, ethyl acetate, butyl acetate, amyl acetate, triethyl citrate, 2-ethylhexyl paramethoxycinnamate, octyl methoxycinnamate, octocrylene, tripropylene glycol dipivalate Etc.

  In particular, when a high amount of a solid organic ultraviolet absorber is blended, it is better to use octocrylene together in order to maintain stability over time.

  Examples of the solid organic ultraviolet absorber used in the present invention include bisethylhexyloxyphenol methoxyphenyltriazine, t-butylmethoxydibenzoylmethane, and diethylaminohydroxybenzoyl hexyl benzoate. More than one species can be used.

  In order to give sufficient UVA protection ability to cosmetics, the blending amount of these solid organic ultraviolet absorbers is preferably 0.5% by weight or more, and the blending amount that can be stably dissolved is 10% by weight or less.

  In the present invention, alkanediol and ethanol are used in combination as a preservative.

  In order to give sufficient storage efficacy by using these in combination, the amount of alkanediol blended is 0.5% by weight or more, and 3% by weight or less from the viewpoint of emulsion stability.

  For the same reason, ethanol is blended in the range of 1 to 5% by weight.

  In this invention, you may provide another preservative in the range which does not impair the effect of this invention.

  Specifically, undecylenic acid, salicylic acid, sorbic acid, potassium sorbate, dehydroacetic acid, sodium dehydroacetate, trichlorohydroxydiphenyl ether, isopropylmethylphenol, orthophenylphenol, sodium orthophenylphenol, chlorhexidine gluconate, cresol, chlorthymol, Chlorphenesin, chlorxylenol, chlorcresol, dichloroxylenol, dichlorobenzyl alcohol, thiobischlorophenol, thymol, trichlorocarbanilide, trichlorohydroxydiphenyl ether, sodium phenoxide, parachlorophenol, halocarban, phenethyl alcohol, phenoxyethanol, phenol , Hexachlorophene, stearyldimethylben chloride Ruammonium, stearyltrimethylammonium chloride, cetyltrimethylammonium chloride, cetyltrimethylammonium chloride, cetylpyridinium chloride, benzalkonium chloride, benzethonium chloride, lauryltrimethylammonium chloride, laurylpyridinium chloride, alkylisoquinolinium bromide, bromide Cetyltrimethylammonium, domifene bromide, lauryltrimethylammonium bromide, cetyltrimethylammonium saccharin, alkyldiaminoethylglycine hydrochloride, sodium lauryldiaminoethylglycine, Photosensitive element 101, Photosensitive element 201, Photosensitive element 401, Paradimethyl iodide Aminostyryl heptylmethylthiazolium, tea extract, hinokitiol, silver-copper zeolite, glutaral, chloramine , Chlorhexidine, diisethionate dibromo prop spermidine, pyrithione zinc, trichloro hydroxy diphenyl ether, sodium pyrithione, 5-bromo-5-nitro-1,3-dioxane, poly-aminopropyl biguanide and the like.

  The cosmetics of the present invention include fats and oils, waxes, hydrocarbons, fatty acids, ether oils, silicone oils, fluorine, which are components blended in ordinary cosmetics, as long as the effects of the present invention are not impaired as necessary. Oil, polyhydric alcohol, saccharide, water-soluble polymer, moisturizer, pH adjuster, antioxidant, sequestering agent, dye, fragrance, plasticizer, organic solvent, drug, animal and plant extracts, constitution powder, organic Color materials, inorganic color materials, pearl pigments, surface-treated powders, composite pigments, amino acids and peptides, vitamins and the like can be appropriately blended, but are not particularly limited thereto.

  The cosmetic of the present invention uses a combination of one or more ester oils selected from ethyl oleate, ethyl linoleate, and isopropyl linoleate, alkanediol, and ethanol as a solvent for a solid organic ultraviolet absorber. Thus, there is an advantage in that a solid organic ultraviolet absorber can be dissolved stably, it is paraben-free, and a sufficient preservation effect can be imparted with a small amount of a preservative.

  Next, the cosmetics of the present invention will be described in detail with reference to examples, but the present invention is not limited thereto.

In order to select the solvent of the solid organic ultraviolet absorber, the solubility of the solid organic ultraviolet absorber of each ester oil was compared.
<Method for evaluating solubility>

Among solid organic UV absorbers, 4-tert-butyl-4'-methoxy-dibenzoylmethane, which is particularly poorly soluble, is added to various ester oils by 10% by weight, heated at 80 ° C and dissolved at 4 ° C. It left still and confirmed the presence or absence of the precipitation of a crystal | crystallization visually.
<Result>

  Crystals precipitated with isononyl isononanoate, isotridecyl isononanoate, and ethylhexyl palmitate, but ethyl oleate, ethyl linoleate, isopropyl linoleate, diisopropyl sebacate, and di-2-ethylhexyl succinate were sufficiently solid organic systems. The UV absorber could be dissolved.

Next, the amount of ethyl oleate was changed to actually prepare a sun care cream, and the dissolution stability of the solid organic ultraviolet absorber was evaluated.
<Evaluation of dissolution stability in the preparation>

In order to evaluate the dissolution stability of the solid organic ultraviolet absorber in the preparation, a sun care cream was prepared according to the following formulation.
Ingredient name Compounding amount (% by weight)
(1) Methyl glucose sesquistearate 2.50
(2) PEG-20 methyl glucose sesquistearate 2.50
(3) Octyl dodecyl myristate 6.00
(4) Jojoba seed oil 2.00
(5) Diphenylsiloxyphenyl trimethicone 2.00
(6) Ethyl oleate as appropriate (7) 4-tert-butyl-4'-methoxy-dibenzoylmethane 0.50
(8) Purified water residue (9) Sodium metaphosphate 0.05
(10) Carbomer 0.15
(11) Xanthan gum 0.20
(12) Bentonite 0.40
(13) 1,3-butylene glycol 10.00
(14) 1,2-pentanediol 1.00
(15) Purified water 3.00
(16) Potassium hydroxide 0.03
<Preparation method>

  Components (1) to (7) were dissolved by heating to obtain an oil phase, and components (8) to (14) were mixed and dispersed to obtain an aqueous phase. An oil phase heated to 80 ° C. and an aqueous phase heated to 85 ° C. were mixed, and after preliminary emulsification, a component (15) dissolved in component (16) was added, and further emulsification was performed using a homogenizer. After emulsification, the homogenizer was stopped, and the mixture was cooled to 35 ° C. while gently stirring to obtain each sun care cream.

  As Example 1, a component (6) having an ethyl oleate content of 5% by weight was prepared.

  As Example 2, a component (6) having a blending amount of ethyl oleate of 15% by weight was prepared.

  As Example 3, a component (6) having a blending amount of ethyl oleate of 25% by weight was prepared.

As Example 4, what prepared the compounding quantity of the component (6) ethyl oleate as 35 weight% was prepared.
(Comparative Example 1)

As Comparative Example 1, a component (6) having a blending amount of ethyl oleate of 3% by weight was prepared.
<Evaluation method>

  The mixture was allowed to stand at room temperature for 1 week, and the presence or absence of crystal precipitation of the solid organic ultraviolet absorber was confirmed with a polarizing microscope.

Furthermore, the use feeling of cosmetics was evaluated by three professional panelists.
<Judgment>

Crystal precipitation of solid organic UV absorber was not confirmed, and 2 or more of the 3 panelists felt fresh use feeling as cosmetics, crystal precipitation was not confirmed, but fresh A case where the feeling of use was impaired and two or more panelists felt sticky was indicated by Δ, and a case where crystals were precipitated was indicated by ×.
<Result>

From the above results, the blending amount of one or more ester oils selected from ethyl oleate, ethyl linoleate, and isopropyl linoleate, which is necessary for stably dissolving the solid organic ultraviolet absorber, is 5% by weight. In order to give a fresh feeling of use as a cosmetic, it was determined that 25% by weight or less is preferable.
<Evaluation of UV protection ability>

  The amount of the solid organic ultraviolet absorber was changed, sun care creams were prepared according to the following formulation, and the ultraviolet protective ability was evaluated.

Ingredient name Compounding amount (% by weight)
(1) Methyl glucose sesquistearate 2.50
(2) PEG-20 methyl glucose sesquistearate 2.50
(3) Octocrylene 10.00
(4) Ethyl oleate 15.00
(5) 4-tert-butyl-4'-methoxy-dibenzoylmethane as appropriate (6) purified water residue (7) xanthan gum 0.50
(8) 1,3-butylene glycol 10.00
(9) 1,2-pentanediol 1.00
<Preparation method>

Components (1) to (5) were dissolved by heating to obtain an oil phase, and components (6) to (9) were mixed and dispersed to obtain an aqueous phase. The oil phase heated to 80 ° C. and the aqueous phase heated to 85 ° C. were mixed and emulsified using a homogenizer. After emulsification, the homogenizer was stopped, and the mixture was cooled to 35 ° C. while gently stirring to obtain each sun care cream.
(Reference Example 1)

As Reference Example 1 , a component (5) 4-tert-butyl-4'-methoxy-dibenzoylmethane was prepared at 0.1 wt%.

  As Example 6, a component (5) 4-tert-butyl-4′-methoxy-dibenzoylmethane was prepared at 0.5 wt%.

  As Example 7, a component (5) 4-tert-butyl-4′-methoxy-dibenzoylmethane was prepared at 3 wt%.

  As Example 8, the component (5) 4-tert-butyl-4'-methoxy-dibenzoylmethane was prepared in an amount of 5% by weight.

As Example 9, a component (5) 4-tert-butyl-4′-methoxy-dibenzoylmethane was prepared at 10 wt%.
(Comparative Example 2)

As Comparative Example 2, a component (5) having a blending amount of 4-tert-butyl-4'-methoxy-dibenzoylmethane of 15% by weight was prepared.
<Evaluation method>

  The UV protection ability was evaluated by calculating UVAPF, which is an index of UVA protection ability, according to COLIRA guidelines (METHOD FOR THE IN VITRO DETERMINATION OF UVAPROTECTION PROVIDED BY SUNSCREENPRODUCTTS, 2007).

In this evaluation, a surgical tape (3M Blender ™ Tape 152J-2) was substituted for the acrylic plate on which the cosmetic material was applied.
<Judgment>

After standing at room temperature overnight, the case where crystal precipitation was not confirmed and the UVAPF was 2 or more was evaluated as ○, the case where the crystal precipitation was confirmed as Δ, and the case where crystal precipitation was confirmed as x.
<Result>

  In order to give the cosmetics sufficient UV protection ability, it is preferable to add a solid organic UV absorber in an amount of 0.5% by weight or more, and the amount that can be stably dissolved is determined to be 10% by weight or less. did.

Next, sun care creams were actually prepared using the solid organic ultraviolet absorbers of each ester oil, and the storage efficacy of each sun care cream was compared.
<Comparison of preservation efficacy>

In order to evaluate the preservation efficacy in the preparation, a sun care cream was prepared according to the following formulation.
Ingredient Amount (wt%)
(1) Sodium stearoyl lactate 0.48
(2) Polyglyceryl pentastearate-10 1.52
(3) Behenyl alcohol 2.00
(4) Hydrogenated rapeseed oil alcohol 0.10
(5) Each ester oil 10.00
(6) Octocrylene 10.00
(7) Bisethylhexyloxyphenol-methoxyphenyltriazine 2.00
(8) Diethylaminohydroxybenzoyl hexyl benzoate 2.00
(9) 4-tert-butyl-4'-methoxy-dibenzoylmethane 3.00
(10) Synthetic sodium silicate / magnesium 0.30
(11) Xanthan gum 0.10
(12) 1,3-butylene glycol 10.00
(13) Diglycerin 1.00
(14) Polyglyceryl-10 isostearate 1.50
(15) Purified water Residue (16) Preservative parts as appropriate <Preparation method>

  Components (1) to (9) were mixed and dissolved by heating to prepare an oil phase. In the aqueous phase, component (10) is added little by little to component (15) heated to 70 ° C., heated and dispersed with a homogenizer, and then components (11) to (14) dispersed by hand stirring are added and heated with a homogenizer. Prepared by dispersing.

The emulsification was carried out by setting the oil phase to 80 ° C. and the water phase to 85 ° C., adding the oil phase to the water phase, and thoroughly stirring with a homogenizer. Then, after stopping the homogenizer, it cooled, and the component (16) was added at 45 degreeC, and also it cooled to 35 degreeC, and obtained each sun care cream.
<Preparation of sun care cream with each ester oil>

  In Example 10, component (5) of the above suncare cream formulation is ethyl oleate for each ester oil, component (16) is 1,2-pentanediol for each preservative part, and 1 wt% and 3 wt% for ethanol, respectively. % Were prepared.

As Example 11, the component (5) in Example 10 in which each ester oil was ethyl linoleate was prepared.

As Example 12, the component (5) in Example 11 in which each ester oil was isopropyl linoleate was prepared.
(Comparative Example 3)

As Comparative Example 3, a component (5) in Example 11 in which each ester oil was diisopropyl sebacate was prepared.
(Comparative Example 4)

As Comparative Example 4, component (5) of the sun care cream formulation in which each ester oil was di-2-ethylhexyl succinate was prepared.
<Evaluation method>

With reference to “Japanese Pharmacy Law 15. Preservative Efficacy Test Method”, the preservative efficacy of the suncare cream prepared by the following procedure was tested.
<Preparation of bacterial suspension>

The following test strains were used.
Escherichia coli ATCC 8739, NCIMB 8545
Pseudomonas aeruginosa ATCC 9027, NCIMB 8626
Staphylococcus aureus ATCC 6538, NCTC 10788
Candida albicans ATCC 10231, NCPF 4179
Aspergillus niger ATCC 16404, IMI 149007

  For the culture of various bacteria, a soy bean, casein, digest agar medium was used for the bacteria, and a sublocanten medium was used for the fungi.

The culture conditions are as follows.
Bacteria 30-35 ° C., 18-24 hours C.I. albicans 20-25 ° C., 48 hours niger 20-25 ° C, 1 week

Bacteria were aseptically collected from the cultured cells using a platinum loop and suspended in a sterile physiological saline solution to prepare a suspension containing about 10 ⁸ cells / mL viable bacteria. In addition, A. In the case of niger, the suspension was suspended in a sterilized physiological saline solution to which polysorbate 80 was added at a ratio of 0.05%.
<Judgment>

The inoculum was aseptically injected into a container containing 10 mL of the prepared suncare cream so that the number of viable bacteria was 1.0 × 10 ⁵ , and evenly mixed was stored at 20-25 ° C., then 28 The number of viable bacteria was measured on the day.

In the evaluation, all the bacteria were 1% or less, ◯, 4 of the various bacteria were 1% or less, and the others were x.
<Results of preservation efficacy test>

When Examples 10-12 and Comparative Examples 3-4 containing the same preservative were compared, ethyl oleate, ethyl linoleate, and isopropyl linoleate were used as solvents for the solid organic ultraviolet absorber. In Examples 10 to 12, sufficient storage efficacy was confirmed.
<Comparison with preservatives>

  As Example 13, the component (16) of Example 10 was prepared with 1,2-pentanediol and 0.5% by weight and 3% by weight of ethanol for each preservative part, respectively.

  As Example 14, the component (16) of Example 10 was prepared in which each preservative part was 1,2-pentanediol and ethanol 3% by weight and 3% by weight, respectively.

  As Example 15, the component (16) of Example 10 was prepared by using 1,2-pentanediol and 1% by weight of ethanol for each preservative part, respectively.

As Example 16, the component (16) of Example 10 was prepared in which each preservative part was 1,2-pentanediol and ethanol were 1% by weight and 5% by weight, respectively.
(Comparative Example 5)

As Comparative Example 5, the component (16) of Example 10 was prepared with 1,2-pentanediol and ethanol at 0.1 wt% and 3 wt%, respectively.
(Comparative Example 6)

As Comparative Example 6, a component (16) of Example 10 was prepared in which each preservative part was 1,2-pentanediol, and ethanol was 5 wt% and 3 wt%, respectively.
(Comparative Example 7)

As Comparative Example 7, component (16) of Example 10 was prepared with 1-pentanediol and 1% by weight of ethanol and 0.5% by weight of each preservative part, respectively.
(Comparative Example 8)

As Comparative Example 8, the component (16) of Example 10 was prepared with 1-pentanediol and ethanol at 1 wt% and 10 wt% for each preservative part, respectively.
(Comparative Example 9)

As Comparative Example 9, component (16) of Example 10 was prepared with each preservative part having ethylhexyl glycerin and ethanol at 0.2 wt% and 3 wt%, respectively.
(Comparative Example 10)

As Comparative Example 10, the component (16) of Example 10 was prepared in which each preservative part was ethylhexyl glycerin and ethanol 1% by weight and 3% by weight, respectively.
(Comparative Example 11)

As Comparative Example 11, component (16) of Example 10 was prepared with ethyl hexyl glycerin, disodium edetate dihydrate, ethanol at 0.2 wt%, 0.1 wt%, and 3 wt%, respectively. Was prepared.
<Results of preservation efficacy test>

  In Comparative Example 5 in which 0.1% by weight of 1,2-pentanediol was blended, sufficient storage efficacy could not be imparted, and in Comparative Example 6 in which 5% by weight was blended, the emulsification collapsed.

  In Comparative Example 7 containing 0.5% by weight of ethanol, sufficient storage efficacy could not be imparted, and in Comparative Example 8 containing 10% by weight, emulsification collapsed.

  From the above results, the blending amounts of 1,2-pentanediol and ethanol that can be stably emulsified while giving sufficient storage efficacy are 0.5 to 3% by weight and 1 to 5% by weight, respectively. It was judged that -3 wt% and 3-5 wt% were preferable.

  In Comparative Examples 9 and 10 in which ethylhexylglycerin, which is considered to have a high antiseptic effect, was used instead of 1,2-pentanediol, poor storage efficacy and emulsification disruption were confirmed.

  In Comparative Example 11 in which ethylhexylglycerin and edetate disodium dihydrate were added instead of 1,2-pentanediol, it was confirmed that the storage efficacy was poor.

  From these results, one or more ester oils selected from ethyl oleate, ethyl linoleate, and isopropyl linoleate, an alkanediol with a blending amount of 0.5 to 3% by weight, and a blending amount of 1 to 5 wt. It was confirmed that a sufficient storage effect could be obtained while stably dissolving the solid organic ultraviolet absorber by combining the ethanol of 1%.

  One or two or more ester oils selected from ethyl oleate, ethyl linoleate, and isopropyl linoleate are used as a solvent for a solid organic ultraviolet absorber, and blended with an alkanediol of 0.5 to 3% by weight. When an amount of 1 to 5% by weight of ethanol is used in combination, a cosmetic that is paraben-free and has a high UV protection ability imparted with a sufficient preservation effect with a small amount of preservatives can be developed.

Claims (3)

The following components 1) to 4);
1) 5% by weight or more of one or more ester oils selected from ethyl oleate, ethyl linoleate and isopropyl linoleate 2) 0.5 to 10% by weight of a solid organic ultraviolet absorber
3) 0.5 to 3% by weight of alkanediol
4) 1 to 5% by weight of ethanol
Cosmetics characterized by containing. The solid organic ultraviolet absorber of component 2) is one or two selected from hexyl diethylaminohydroxybenzoyl benzoate, bisethylhexyloxyphenol methoxyphenyltriazine, and 4-tert-butyl-4'-methoxy-dibenzoylmethane The cosmetic according to claim 1, wherein the cosmetic is a solid organic ultraviolet absorber. The cosmetic according to any one of claims 1 to 2, wherein the alkanediol of component 3) is 1,2-pentanediol.