JPS60193911A - Oily cosmetic - Google Patents

Abstract

PURPOSE:The titled cosmetic having extremely improved ultraviolet absorption effect and improved water resistance, obtained by blending an oily cosmetic containing an ultraviolet light absorber and an oil with a dextrin fatty acid ester. CONSTITUTION:An oily cosmetic containing (A) >=0.05wt% ultraviolet light absorber, (B) 0.3-15wt% dextrin fatty acid ester, and (C) an oil, as essential components. In the cosmetic, an amount of the component A having skin irritation properties added can be reduced by the use of the component B having enhancing effect on prevention of ultraviolet rays and improving effect on water resistance, so that safety to the skin can be raised, and the effects can be kept. The upper limit of the component A added varies with aspect of skin safety, for example, it is 15wt% in case of homomenthyl salicylate and 8wt% in case of octyldimethyl PABA.

Description

[Detailed description of the invention] The present invention relates to oily cosmetics.

Tanning your skin to a brown or tan color is seen as an expression of health and beauty or as a fashion item, and many people, especially young people, actively want to get a tan, and they want to give their skin a radiant glow. However, in order to get an even tan, she applies oil-based cosmetics all over her body and exposes her skin to the intense sunlight.

In recent years, awareness of protecting the skin from ultraviolet rays has increased, and these oil-based cosmetics are now containing ultraviolet absorbers that absorb ultraviolet rays (wavelengths of 290 nm to 320 nm) that cause blistering and erythema. It has become to.

However, in order for healthy people to enjoy a moderate tan in the intense midsummer sun, as well as people who are sensitive to UV rays or those who have not exposed their skin to sunlight for a long time, cosmetics that absorb UV rays are necessary. A large amount of the agent must be added.

However, most UV absorbers are skin irritating, and despite their UV absorbing effects, repeated application* of products containing large amounts can cause skin irritation or discoloration. Therefore, although it is effective to prevent blisters and erythema caused by ultraviolet rays by incorporating a large amount of ultraviolet absorber, it is not preferable.

Furthermore, although conventional oil-based cosmetics are oil-based, they are not sufficiently water-resistant, and tend to run off when you go into the water while swimming or swimming, or when you scratch your chin a lot. This may cause unexpected blisters and erythema.

The inventors of the present invention have conducted extensive research to resolve these drawbacks of conventional oil-based cosmetics, and have found that an oil softening agent containing a UV absorber and oil does not itself have a UV absorbing effect. It has been discovered that by blending dextrif fatty acid ester, the ultraviolet absorption effect is significantly increased and the water resistance is further improved compared to when a UV absorber is simply blended into oil.

According to the present invention, it is possible to achieve the desired ultraviolet absorption effect with a smaller amount of ultraviolet absorber, so skin 1i! It is safer and moreover, the effect can be sustained.

(Sides, bottom margin) That is, the present invention provides an oily cosmetic characterized by containing an ultraviolet absorber, a dextrose fatty acid ester, and an oil.

The structure of the present invention will be described in detail below. The dextrin fatty acid ester used in the present invention is obtained by decomposing natural starch so that its average degree of polymerization is from 0 to 50 gulf units. It is obtained by reacting starch decomposition products with fatty acid chloride or fatty acid anhydride.

Representative examples include dextrin balmitic acid ester, dextrin stearic acid ester, dextrin palmitic acid stearic acid ester, dextrin maleic acid ester, etc., and one or more of these may be arbitrarily selected and used. The degree of ester substitution of the fatty acid in the dextrin fatty acid ester may be varied as desired, but it must be at least 1 glucose unit. If it is less than 05, it will not dissolve depending on the oil. Furthermore, if the average degree of polymerization of the natural starch decomposition product exceeds a certain level, the dissolution temperature in oil may exceed 100°C, making it impossible to use it in actual production.

Tegis) The amount of IJ fatty acid ester is oil seed ff
+ J-3 0.3 depending on composition and usability
wt% to 15 wt%, and if it is less than 0.3W 7%, the UV protection enhancement effect and water resistance will decrease;
When it exceeds t%, most oils lose fluidity and become difficult to apply uniformly.

Known UV absorbers used in the present invention include All UV absorbers can be used effectively.

Representative ultraviolet absorbers are listed below.

Benzoic acid-based compounds include: Noguraaminoben, @Froic acid (hereinafter abbreviated as PABA) Glyceryl PAEA Ethyldihydroquinepropyl PAEA N-ethoxylate) PABA Ethyl ether N-dimethyl P A B I + Ethyl ether I - Dimethyl P
/4 B A Butyl ether N-dimethyl PABA Amyl ether Mekdyl dimethyl PABA Anthranilinochic acid type, Pomome 1-R toacedylanthranilate, salicylic acid type, Amyl salicylate Menthyl salicylate Homo menthyl salicylate Octyl salicylate Phenyl salicylate Pencil salicylate P-improbanol phenyl salicylate cinnamic acid type octyl cinnamate ethyl-4-isopropyl cinnamate ethyl-2,4
-Diisopropylcinnamate methyl -2,4-diisopropylcinnamatepropyl -P-methoxycinnamateisopropyl -P-methoxycinnamateisoamyl-
P-Methoxycinnamate 2-ethoxyethyl-P-menoxy 81 meth, cyclohexyl-P-methoxycinnamate ethyl-α-lanano-β-phenylcinnamate 2-ethylhexyl-α-cyano-β-phenylcinnamate glycolmono -2-ethylhexanoyl dibara methoxycinnamate as a benzophenone type 2,4-dihydroxybenzophenone 2,2'-dihydroxy-4-methoxybenzophenone 2,2'-dihydroxy-4,4'dimethoxybenzophenone 2, 2',4,4'-Tetrahydroxybenzophenone 2-hydroxy-4-methoxybenzophenone. Killer ro tokiu δchi 2. Bearzo 7.7
Tsuni Doki, -81, Giube, Zo7.7a4-Fe=
Ruhenzophenone 2-ethylhexyl-4'-phenyl-benzophenone-2-carboxylate 2-hydroxy-4-n-octoxybenzophenone 4-hydroxy-3-carboxybenzophenone Others: 3 (4'-methylbenzylidene) 1 No camphor 3-benzylidene-cl, 7-camphor urocanic acid Ethylnisal urocanate 2-phenyl-5-methylbenzoxazole 2.2L Hydroxy-5-methylphenyl-benzotriazole 2
-(2'-human tetraxy-5-t-octyl-phenyl)
-benzotriazoledibenzalazinedibenzoylmethane 4-methoxy-4'-t-butyl-dibenzoylmethane 5-(3,3-dimethyl-2-norbornylidene)-3
-pentan-2-one, etc.

The amount is determined depending on the amount of the UV absorber and the UV absorption effect of the combination, but considering the UV absorption effect, the amount is required to be 0.05 wt% or more.

The upper limit varies depending on the skin safety, but for example, homomenthyl salicylate is 15 wt%, octyldimethyl PABA is 8 wt%, 2.2'-dihydroxy-4
-Methoxybenzophenone is 3 wt%.

(Left below) The oil used in the present invention can be almost any oil commonly used in cosmetics, but when N-dimethylborisirogysan accounts for 50 wt% of the total oil, the dextrin fatty acid ester will not dissolve. 0 Leap oil, macadamiana, soybean oil, coconut oil, jojoba oil, avocado oil, rice bran oil, cottonseed oil, sesame oil, Novaki a1
1. Animal and vegetable oils such as peanut oil, other ester oils such as isopropyl myristate, isopropyl palmitate, and A-leyl oleate, fatty acids such as linoleic acid, A-leic acid, and isostearic acid, oleyl alcohol, octyldodecanol, hexyldecanol, and instearyl. -Higher alcohols such as alcohol can be mentioned, and one type or a mixture of two or more of these can be used. Gochoguchi, solid at room temperature Semi-solid oils, such as vaseline, lanolin, cacao butter, coconut oil, palm oil, Japanese wax, etc.
It can be blended within the range that maintains the oil shape.

In addition to the above-mentioned ingredients, the oily cosmetic of the present invention includes common raw materials used in cosmetics, such as methylparaben,
Preservatives such as ethylparaben, propylparaben, butylparaben, antioxidants such as tocopherol, butylhydroxyanisole, dibutylhydroquine toluene, β-
Drugs such as carotene, γ-t IJ-yol, ethinyl estradiol, tocophenylacetate, powders such as titanium oxide, zinc white, mica, bentonite, kaolin, talc, mica, bismuth oxychloride, anhydrous silicic acid, guanine, Laminated eye greasiness burl agent/mica
Pearling agents such as titanium-based burl agents, iron oxide, gunjo,
Inorganic pigments such as chromium oxide and cobalt blue, Sudan■,
Kinizanindareen SS1 Kino Butsu Rin Yellow SS etc., span type, tween type, p
ox alkyl ether type, poE alkyl ester type,
pOE-]? OF type, glycerin fatty acid ester type, POE glycerin fat IF [ester type surfactants, dipropylene glycol, propylene glycol, L
3-Butylene glycol, quaseline, polyethylene glycol, and other moisturizing agents can be added in an amount of %j.

Next, the effects of the present invention will be explained.

[Experimental Example-1] Each raw material was weighed according to the blending amount in Table-1, stirred in water in contact with heating bath M at 90°C, and then cooled to the following temperature to prepare a sample. A portion of the prepared sample was applied to a transparent quartz glass plate using an applicator for a coating thickness of 5 μm, and the absorbance at a wavelength of 308 nm was determined by spectrophotometric clouding. Also, from the absorbance, the SPF value (SUN PROTEOT ON IPAOTOR)
- (Amount of ultraviolet energy necessary to cause the minimum erythema on skin R'l using a UV absorber) ÷ (Amount of ultraviolet light energy necessary to cause the minimum erythema on skin firmness without using a UV absorber) estimated. In addition, to evaluate the water resistance of the sample, the ultraviolet absorber n was quantified by extraction with ethanol immediately after applying the sample to the arm and after washing with water at a constant flow rate, and the residual rate of the ultraviolet absorber (%) - ( Washing with water?'FL Amount of ultraviolet absorber on skin) - (Amount of ultraviolet absorber on skin 1-1 of Washing with water 1) x 100.

In addition, the degree of erythema was evaluated for the degree of sunburn on the part of the back where each sample was applied after taking a sea bath in midsummer.

Table 1: The absorbance increases as the concentration of dextrin palmitate stearate increases, and the degree of erythema also significantly improves. It can also be seen that the residual rate of octyldimethyl PABA on the skin was 70% when the amount of IJ palmitate stearate was 0.3 wt%, and 90% or more when the amount was 1 wt% or more.

[Experimental Example-2] Each raw material was weighed according to the blending amount in Table-2, and all samples were heated and melted at 100'C and cooled to 5°C while stirring in wet water. A portion of the prepared sample was applied to a transparent quartz glass plate using an applicator for a coating thickness of 5 μm, and the absorbance at a wavelength of 306=IM=4Ill was determined by spectrophotometry. Further, the residual rate was determined in the same manner as in Experimental Example-1.

(Sides, bottom margin) This result shows that the absorbance is not affected even if dextrin palmitate stearate is blended if homomenthyl salicylate is not blended, but in the sample containing homomentyl salicylate, dextrin palmitate stearate is not affected. The samples containing stearic acid ester all had higher absorbance, indicating an increase of 20% to 30%.

As described above, the present invention shows that when a dextrin fatty acid ester is blended into an oily cosmetic containing an ultraviolet absorber and an oil, the ultraviolet absorption effect is enhanced. A smaller amount of ultraviolet absorber is required when the UV absorber is added. As a result, skin irritation caused by the ultraviolet absorbent itself can be reduced without weakening the ultraviolet absorption effect. In addition, when dextrose (Dex) IJ fatty acids are added, water resistance is significantly improved, making it possible to avoid blisters and erythema caused by unexpected sunburn.

Examples are described below.

Example-1wt% (A) Ejiruji and Droxypropyl PAEA O,5
FAB A 0.5 (B) Dextrin stearate 6 Isoprobyl myristate 30 Lanolin alfur 5 Liquid paraffin 5B (C) Fragrance Appropriate amount Phase B was heated to 100°C, dissolved, and then cooled to 70°C. After adding phase and C phase, stir and cool to 6°C in ice water.The absorbance of this product (measurement method is the same as in the experimental example).
was 028, and when dextrin stearate was removed (IF+ exchanged with liquid paraffin), it was 020. The residual rate of each UV absorber after washing with water is 98%.
, 40%.

(Margin below) Example-2wt% (A) Isopropime P-methoxycinnamate 3 (
B) Dextrin oleate 0.5 Dextrin palmitate 4 Coconut oil 4 Octyldodecyl myristate 635 Liquid paraffin 25 (0) Fragrance Appropriate amount Phase B was heated to 90°C, dissolved and then cooled to 70°C. After adding the human phase and phase C, the absorbance was stirred and cooled to 25"C in ice water.The absorbance of this product was 0.61, and when the dextrin palmitic acid ester was removed (replaced with liquid paraffin), it was 0.50. there were.

The residual rate of the UV absorber after washing with water is 95% and 32%, respectively.
%Met.

(Leaving space below) Example - 3wt% (A) Octyl dimethyl PABA 7 (11) Dextrin palmitic acid stearate 10 Castor oil' [5 Isocetyl alcohol 10 Mica titanium 0.4 1 (C) Vitamin E acetate →i Mitsunomicil Hydroxytoluene (appropriate amount) Flavor (appropriate amount) Heat phase B to 100°C, dissolve, cool to 70°C, add phase A and C, stir in ice water to 25'C, cool Jg
The absorbance of this product was 3.1, and was 24 when dextrin palmitate stearate was removed (replaced with castor oil).

The residual rate of ultraviolet absorber after washing with water is 98% and 43%, respectively.
%Met.

(Left below) Example-4 (A) Homomethyl salicylate 10wt%2-(j-
Hydroxy-51-methylphenol)-hencytriazole 3(B) Dextrin stearate 3
Isopropyl myristate 1゜Lanolin alcohol 3 Acetylated lanolin 2 Polyglycerol decaolate 5 Liquid paraffin 59 Propyl paraben Appropriate amount Titanium dioxide 5 (0) Fragrance Appropriate amount Phase B was heated to 100°C, dissolved and cooled to 70°C, and A After adding the phase and phase 0, the mixture was stirred and cooled to 25'C in ice water. In addition, the absorbance of this product at 310 nm is
When dextrin stearate was excluded (replaced with liquid paraffin), it was 20. The residual rates of the ultraviolet absorber after washing with water were 83% and 24%, respectively.

Example-5 (△) Isopropyl P-methoxycinnamate 5wt
%4-Me1-xy-4-butyl-dibenzoylmethane
3 (B,) Textolin balmitic acid ester 4 Dextosone stearic acid ester 4 Jojoba oil 4 Macadamia nut oil 4 Olive ijl+ 57 Coconan h114 Avocado oil 4 Almond oil 4 Cottonseed oil.

Lamino-1-resin pearl agent 3 Butylparaben Appropriate amount (0) Fragrance Appropriate amount Heat phase B to 100''C, dissolve and cool to 70℃, add human phase and phase C to 25''C in dewatered water. The mixture was stirred and cooled. The absorbance of this product at 308 nm was 20, and it was 15 when texturinbalmitic acid ester was removed (1tt exchanged with olive oil). The residual rates of the ultraviolet absorber after washing with water were 97% and 31%, respectively.

(A) Octyldimethyl PABA 3wt% x nitroxytoxypenzophenone 3glyceryl moro
Ethylhexanoyl-baramethoxycinnamate 4 (B) Dextrin palmitic acid stearate 05 Corn oil 698 Isopropyl lystate 5 Liquid paraffin 5 Bergamot oil 4 Tween 804 Dipropylene glycol l Elutriate-oryzanol 02 Propyl paraben Appropriate amount Vaseline 1 (0) Just the right amount of fragrance. The absorbance of this product was 3.4. UV cut 113! The survival rate of the agent after washing with water was 73%.

Special F (Applicant: Shiseido Co., Ltd.

Claims (1)

[Claims] An oily cosmetic characterized by containing a UV absorber, a dextrin fatty acid ester, and an oil.