JP2008179628A - Oil-in-water type emulsified sunscreen agent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil-in-water type emulsified sunscreen agent having low viscosity of less than 20,000 mPa s at 30°C, excellent usability such as spreading property, reduced oily feeling, and excellent in preservation stability. <P>SOLUTION: The invention relates to the oil-in-water type emulsified sunscreen agent characterized by comprising following components (A)-(E): (A) a polyglycerol-modified silicone, (B) 3-30% of fine particles of metal oxide, (C) 3-30% of a silicone oil, (D) 0.01-2% of a dextrin fatty acid ester and/or inulin fatty ester and (E) water. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a water-in-oil emulsified sunscreen, more specifically, the viscosity at 30 ° C. is less than 20000 mPa · s, and it has good usability such as less spreading and less oiliness, The present invention relates to a water-in-oil type emulsion sunscreen having excellent stability.

  Some cosmetics contain an organic ultraviolet blocking agent or an inorganic ultraviolet blocking agent in order to prevent the influence of ultraviolet rays on the skin. This organic UV blocker is oil-soluble or water-soluble, and is highly transparent and used in many sunscreens. However, it is not preferable to add a large amount from the viewpoint of safety. Is often used together. As the inorganic ultraviolet blocking agent, fine particle powder is usually used, and among them, titanium oxide, zinc oxide and cerium oxide, which have a high ultraviolet protection effect, are often used. In particular, zinc oxide has a low refractive index and superior transparency compared to titanium oxide.

  In order to reduce the whiteness of the skin during and after use as a make-up material, there is a report on a method for producing finely divided zinc oxide, which is further highly transparent (see, for example, Patent Document 1).

  Sunscreens are divided into oil-in-water emulsified cosmetics and water-in-oil emulsified cosmetics depending on the type of emulsification, but water-in-oil emulsified cosmetics are preferred because of their good spread and excellent usability. It is. However, there are many problems to be examined, such as oiliness when applied to the skin, and sedimentation and viscosity increase due to powder aggregation over time during storage.

  Therefore, there is a report of combining a surface-treated powder, a silicone oil, and a specific silicone surfactant in order to improve the stability of the product over time (for example, see Patent Document 2). Also, a specific organopolysiloxane copolymer is used as a dispersant for the purpose of improving the dispersibility of the powder and improving the transparency (no whiteness of the powder) and usability when applied to the skin. There are reports (see, for example, Patent Document 3). However, low-viscosity cosmetics may cause powder aggregation over time, and the usability when applied to the skin may not be satisfactory.

  On the other hand, there is a so-called cream-type water-in-oil emulsified cosmetic in which the viscosity of the cosmetic is increased. For example, there is a technology that improves the stability over time by suppressing the aggregation of powder and emulsified droplets by increasing the viscosity of the oil system using an oil-soluble gelling agent such as dextrin fatty acid ester or inulin fatty acid ester (For example, refer to Patent Documents 4 to 12). However, those using these oil-soluble gelling agents have a high viscosity, from cream to emulsion, and it has been difficult to make cosmetics with good spread.

  There are reports that use silicone-branched polyglycerin-modified silicones to improve the dispersibility of particulate metal oxides, improve usability such as light spreading and oiliness, and stability over time (Patent Document 13). By using a silicone-branched polyglycerin-modified silicone, dispersibility is improved and a low viscosity, and a cosmetic having good usability such as spreading and less oiliness is obtained, but the viscosity at 30 ° C. is 20000 mPa · When the viscosity was less than s, the blended powder was agglomerated and further settled, and the stability over time was not excellent.

  As described above, studies on low-viscosity, specifically water-in-oil type emulsion sunscreens with a viscosity at 30 ° C. of less than 20000 mPa · s have not been sufficiently conducted. No investigation has been made on water-in-oil emulsified sunscreens with improved dispersion stability and low viscosity.

JP-A-2-208369 JP-A-63-215615 JP-A-11-263708 JP 2002-193747 A JP 2002-193741 A JP 2001-302484 A JP 2001-294512 A JP 2001-58921 A JP 2000-72646 A JP 11-29459 A Japanese Patent Laid-Open No. 11-21224 JP-A-8-310914 JP 2004-169015 A

  The problem to be solved by the present invention is an oil that has good usability such as light spreading and low oiliness, low viscosity of less than 20000 mPa · s at 30 ° C., and excellent stability over time It is to obtain a water-in-water emulsified sunscreen.

  In such a situation, the present inventor has conducted extensive research to solve the above problems, and as a result, (A) polyglycerin-modified silicone, (B) fine particle metal oxide, (C) silicone oil, (D) dextrin fatty acid ester and / Inulin fatty acid ester and (E) By combining each specific amount of water, it has usability such as light spreading and no oiliness, and the viscosity at 30 ° C. is less than 20000 mPa · s. It was found that a water-in-oil emulsified sunscreen excellent in the stability of the product was obtained, and the present invention was completed.

That is, the present invention includes the following components (A) to (E),
(A) Polyglycerin-modified silicone (B) Fine particle metal oxide 3 to 30% by mass
(C) 3-30% by mass of silicone oil
(D) Dextrin fatty acid ester and / or inulin fatty acid ester 0.01-2% by mass
(E) It relates to a water-in-oil emulsified sunscreen, characterized by blending water and having a viscosity at 30 ° C. of less than 20000 mPa · s.

  Furthermore, it is related with the said water-in-oil type emulsion sunscreen which the compounding mass ratio (B) / (A) of a component (A) and a component (B) exists in the range of 1 / 1-50 / 1.

  Furthermore, it is related with the said water-in-oil type emulsion sunscreen which the carbon number of the constituent fatty acid of the dextrin fatty acid ester of component (D) and / or inulin fatty acid ester is 8-22.

  Furthermore, it is related with the said water-in-oil type emulsion sunscreen which the constituent fatty acid of the dextrin fatty acid ester of a component (D) is octanoic acid and / or palmitic acid.

  Further, the present invention relates to the water-in-oil type emulsion sunscreen wherein the constituent fatty acid of the inulin fatty acid ester of component (D) is stearic acid.

  Further, in the oil, the surface of the particulate metal oxide of component (B) is treated with one or more silicone compounds selected from methylhydrogendimethylpolysiloxane copolymer or alkoxysilylated dimethylpolysiloxane It relates to a water-type emulsified sunscreen.

  Furthermore, it is related with the said water-in-oil type emulsion sunscreen which the compounding mass ratio of a component (B) and a component (D) is the range whose (B) / (D) is 3-200.

  The water-in-oil emulsified sunscreen of the present invention has good usability such as low viscosity, light spreading and no oiliness, less viscosity increase over time, and powder sedimentation. It has a quality excellent in stability over time, and has an excellent quality as a sunscreen.

Hereinafter, the present invention will be described in detail.
The component (A) polyglycerin-modified silicone used in the present invention is used for dispersing the component (B) particulate metal oxide, and is a polyglycerin-modified silicone represented by the following general formula (1). is there.

[In the formula (1), R ¹ represents an alkyl group having 1 to 30 carbon atoms, an aryl group, an aralkyl group, a fluorine-substituted alkyl group, an amino-substituted alkyl group, a carboxyl-substituted alkyl group, or an organic group represented by the following general formula (2). The same or different organic group selected from

(Wherein a, b and c are 1.0 ≦ a ≦ 2.5, 0.001 ≦ b ≦ 1.5 and 0.001 ≦ c ≦ 1.5, respectively)

(Where d, e and f are integers of 0 ≦ d ≦ 15, 0 ≦ e ≦ 50 and 0 ≦ f ≦ 50, respectively)

R ² is a polyglycerin derivative represented by the following general formula (3) and / or (4).

(Wherein ^{R 4} is a hydrogen group or an alkyl group having 1 to 30 carbon atoms, or ^R 5 - (CO) - organic group, ^{R 5} represented by is a hydrocarbon group having 1 to 30 carbon atoms .Q ether A C3-20 divalent hydrocarbon group which may contain a bond or an ester bond is shown, s is an integer of 2-20, and t is an integer of 1-20.)
R ³ is a silicon-containing group represented by the following general formula (5).

(G is an integer of 1 ≦ g ≦ 5, and h is an integer of 0 ≦ h ≦ 500)

The polyglycerin-modified silicone of the present invention can be synthesized by, for example, the method described in JP-A No. 2004-169105 and the like, and commercially available products include KF-6100 and KF-6105 (manufactured by Shin-Etsu Chemical Co., Ltd.). Etc.
The compounding quantity of the component (A) used by this invention is not specifically limited, It is possible to determine suitably according to the other component used by this invention.

  The particulate metal oxide of component (B) used in the present invention is used for protecting the skin from ultraviolet rays, and is not particularly limited as long as it has this effect, but titanium oxide, zinc oxide, oxidation Examples include zirconium and cerium oxide. Examples of the shape of these powders include a spherical shape, a needle shape, a spindle shape, a plate shape, and a flake shape. The particle diameter is 5 to 100 nm, preferably 10 to 50 nm. These powders may be treated with inorganic components such as silica, alumina and zirconia for the purpose of reducing surface activity.

  The amount of the component (B) used in the present invention is 3 to 30% by mass (hereinafter, “% by mass” is described as “%”), and has an ultraviolet protection effect, light spreading and oiliness. It has good usability, such as the absence of sunscreen, and a low-viscosity sunscreen can be obtained. When the blending amount of the component (B) is less than 3%, a sufficient UV protection effect cannot be obtained, and when it exceeds 30%, the stretch is heavy, and the viscosity of the water-in-oil emulsified sunscreen increases, which is not preferable. .

  If the methyl hydrogen dimethyl polysiloxane surface-treated to the component (B) used for this invention is illustrated more concretely, it will be represented by the following general formula (6) described in Japanese Patent No. 3073890. And methylhydrogendimethylpolysiloxane. Further, the alkoxysilylcadimethylpolysiloxane surface-treated to the component (B), if more specifically exemplified, is an alkoxysilylcadimethyl represented by the following general formula (7) described in JP-A-7-196946. Polysiloxane is mentioned.

(M and n are integers, m + n = 7 to 50, m: n = 0.7 to 1.3: 1)

(R independently represents an alkyl group (methyl, ethyl, propyl, etc.), X represents a hydroxyl group or an alkoxy group, Y represents a direct bond, or a divalent hydrocarbon group (methylene, ethylene, butylene, etc.). And those hydrogen atoms may be substituted by other substituents, p represents an integer of 1 to 3, and q represents 25 to 100)

  The surface treatment amount of methylhydrogendimethylpolysiloxane and / or alkoxysilylcadimethylpolysiloxane surface-treated on the component (B) used in the present invention is not particularly limited, but preferably 1 to 10%, More preferably, it is 3 to 7%.

  The component (A) and the component (B) used in the present invention have good powder dispersibility and light spreading when the blending mass ratio (B) / (A) is in the range of 1-50. And a low-viscosity water-in-oil emulsified sunscreen with good usability such as no oiliness. Furthermore, it is more preferable if the blending mass ratio (B) / (A) is in the range of 5-30.

The silicone oil of component (C) used in the present invention is formulated for the purpose of improving the dispersibility of the particulate metal oxide and improving the feeling of use such as good spread and no oiliness. Specific examples are linear dimethylpolysiloxane, branched dimethylpolysiloxane, cyclic dimethylpolysiloxane, methylphenylpolysiloxane, fluorine-modified organopolysiloxane, etc. Tetramer dimethylpolysiloxane of tetramer, pentamer, hexamer or linear dimethylpolysiloxane having a viscosity at 25 ° C. of less than 1 to 6 mm ² / s is particularly preferable because excellent usability is obtained. Can be mentioned. These silicone oils can be used alone or in combination of two or more as required.

  If the amount of the component (C) used in the present invention is 3 to 30%, a water-in-oil type emulsion sunscreen having good usability such as light spreading and no oiliness can be obtained. Furthermore, 10 to 25% is more preferable. When the blending amount of the component (C) is less than 3%, a feeling of light spreading is not obtained, and when it exceeds 30%, an oily feeling of use is obtained, which is not preferable as a water-in-oil type emulsion sunscreen. .

  In the present invention, the dextrin fatty acid ester and / or inulin fatty acid ester of the component (D) used in the present invention is adsorbed on the surface of the component (B) to form a protective colloid. It is blended for the purpose of preventing agglomeration and improving dispersion stability, and is different from that of the prior art, which increases the viscosity of oily components and suppresses sedimentation of powder.

  If the compounding amount of the component (D) used in the present invention is 0.01 to 2%, the dispersibility of the component (B) is improved, and the usability such as light spreading and no oiliness is obtained. A good and low viscosity water-in-oil emulsified sunscreen can be obtained. The blending amount is more preferably in the range of 0.05 to 1.5%. When the blending amount of component (D) exceeds 2%, the viscosity of the sunscreen becomes high, and it becomes difficult for the viscosity at 30 ° C. to be less than 20000 mPa · s. Stability deteriorates and is not preferable as a water-in-oil type emulsion sunscreen.

  Although the dextrin fatty acid ester of the component (D) used for this invention is not specifically limited, The dextrin fatty acid ester of acyl group substitution degree 1.5-1.7 can be mentioned as a suitable thing. Further, as the constituent fatty acid of the dextrin fatty acid ester, a linear fatty acid having 8 to 22 carbon atoms is preferable, more preferably a linear fatty acid having 8 to 18 carbon atoms, and particularly preferably octanoic acid or carbon having 8 carbon atoms. It is the number 16 palmitic acid. The dextrin used for component (D) preferably has an average sugar polymerization degree of 3 to 150. The substitution degree of fatty acid per glucose unit of dextrin in component (D) is preferably 1.5 to 1.7.

  Further, the inulin fatty acid ester of component (D) is not particularly limited, and examples thereof include inulin fatty acid esters having an acyl group substitution degree of 2 or more. The constituent fatty acid of the inulin fatty acid ester is preferably a linear fatty acid having 14 to 22 carbon atoms, more preferably stearic acid having 18 carbon atoms. The degree of substitution of fatty acids per fructose unit of inulin in component (b) is preferably 2 or more.

  The component (B) and the component (D) used in the present invention are lightly spread and not oily if the blending mass ratio (B) / (D) is in the range of 3 to 200. A low-viscosity sunscreen having the properties is obtained. Furthermore, it is more preferable if the blending mass ratio (B) / (D) is in the range of 10-100.

  The water of the component (E) used for this invention is an essential component as a component which comprises the inner water phase of a water-in-oil type emulsion sunscreen. The component (E) used in the present invention includes, in addition to purified water generally used in cosmetics, hot spring water, deep ocean water, fruit water, plant water, plant steam distilled water, and the like.

  Although the compounding quantity of the component (E) used for this invention is not specifically limited, 10 to 70% in the whole composition is preferable.

  In the water-in-oil type emulsion sunscreen of the present invention, in addition to the above essential components, components generally used in cosmetics as optional components such as water-soluble components, humectants, oils, surfactants, thickeners Ingredients used in normal cosmetics such as agents, powders, pigments, UV absorbers, film-based preparations, pH adjusters, anti-fading agents, antioxidants, antifoaming agents, cosmetic ingredients, preservatives, and fragrances It can mix | blend suitably in the super qualitative range which does not impair the fragrance | flavor of invention.

  The following examples further illustrate the present invention. In addition, these do not limit this invention at all.

Invention products 1 to 8 and comparative products 1 to 9 Water-in-oil emulsified sunscreens Water-in-oil emulsified sunscreens are prepared according to the compositions shown in Tables 1 and 2 and the following production method. The evaluation method and judgment criteria shown below were used for evaluation. These results are also shown in Tables 1 and 2.

(Manufacturing method)
A. Ingredients (1) to (5) are uniformly mixed with three rollers.
B. Components (6) to (11) are dissolved by heating.
C. Add component (12) to A and B and mix uniformly.
D. E. Components (13) to (16) are added to C and emulsified and mixed. D is degassed and filled into a container to form a sunscreen.
(Evaluation item)
<1> Light spreading <2> No oiliness <3> Viscosity <4> Stability over time

(Evaluation methods)
Evaluation item <1> Light spreading and <2> No oily special panel of 20 people using the samples of the present invention products 1-8 and comparative products 1-9, <1> Each evaluation item of light spreading and <2> no oiliness was evaluated on a five-point scale using the following (i) absolute evaluation criteria. And the average value of the score of each sample was further evaluated using the following (b) four-step evaluation criteria.
(B) Absolute evaluation criteria (score):
4: Very good 3: Good 2: I can't say either 1: Bad 0: Very bad (b) 4-level evaluation criteria (score): (Evaluation)
3.5 or more: ◎ (very good)
2.5 or more, less than 3.5: ○ (good)
1.5 or more and less than 2.5: △ (somewhat poor)
Less than 1.5: x (defect)

Evaluation Item <3> Viscosity The samples 1 to 8 of the present invention and the comparative products 1 to 9 were left in a thermostatic bath at 30 ° C. for 12 hours, and then the viscosity was measured with the Brookfield viscometer under the conditions (c).
(C) Measurement conditions After being allowed to stand in a thermostatic bath at 30 ° C. for 12 hours in a No. 8 standard bottle, the viscosity value was measured after 6 rotations and 1 minute with a No. 3 rotor.
(D) Four-level evaluation criteria (score): (Evaluation)
Less than 10,000 mPa · s: ◎
10,000 or more and less than 20000 mPa · s: ○
20,000 or more and less than 50000 mPa · s: Δ
50000 mPa · s or more: ×

Evaluation item <4> Stability over time The samples of the present invention products 1 to 8 and comparative products 1 to 9 were subjected to Brooke immediately after adjustment (immediately after viscosity) and after being left in a thermostatic bath at 50 ° C. for 14 days (viscosity with time). The viscosity was measured under the conditions of (e) with a field viscometer.
(E) Measurement conditions (immediate viscosity) Immediately after preparation 6 rotations with a No. 3 rotor, measured viscosity value after 1 minute (Viscosity with time) Immediately after preparation 6 rotations with a No. 3 rotor, measured viscosity value after 1 minute (d) 4 stages Evaluation criteria (score): (evaluation)
(Aging viscosity) / (immediate viscosity) = less than 1.25:
(Viscosity with time) / (Viscosity immediately after) = 1.25 or more and less than 1.5: ○
(Viscosity with time) / (Viscosity immediately after) = 1.5 or more and less than 5: Δ
(Viscosity with time) / (Viscosity immediately after) = 5 or more: ×

As is clear from the results of Tables 1 and 2, the sunscreens of the products 1 to 8 of the present invention have a low viscosity, have a usability such as light spreading and no oiliness, It has been demonstrated that it has excellent quality with little increase in viscosity. On the other hand, in Comparative product 1 in which component (D) was not blended, the spread and stability over time were not good. In Comparative Product 2 with a large amount of component (D), the spread and oiliness were not good and the viscosity was high. The comparative product 3 containing a large amount of the component (A) was not good except for the viscosity. On the contrary, the comparative product 4 containing only a small amount of the component (A) was not good in all cases. In Comparative Product 5 and Comparative Product 6 in which an oily wax is blended in place of Component (D), and Comparative Product 7 in which another surfactant is used in place of Component (A), except for the absence of oiliness The comparative product 8 using another surfactant instead of the component (A) and the comparative product 9 with a large amount of the component (B) were not good in all items.

Water-in-oil emulsified sunscreen (component) (%)
(1) Methyl hydrogen dimethyl polysiloxane
Treated silica treated fine particle zinc oxide 15.0
(2) Polyglycerin-modified silicone (Note 1) 5.0
(3) Polyoxyethylene (10) hydrogenated castor oil 1.0
(4) Decamethylcyclopentasiloxane 20.0
(5) Octocrylene 1.0
(6) Butylmethoxydibenzoylmethane 1.0
(7) Octyl rearzone 1.0
(8) Diethylaminohydroxybenzoylhexyl benzoate 2.0
(9) Isotridecyl isononanoate 5.0
(10) PEG-9 polydimethylsiloxyethyl dimethicone 2.0
(11) Inulin stearate (Note 5) 0.5
(12) Dextrin parimitic acid ester (Note 6) 0.5
(13) Hexylene glycol 0.5
(14) Dipropylene glycol 6.0
(15) Glycerin 2.0
(16) Funylbenzimidazolesulfonic acid 4.0
(17) Triethanolamine 2.5
(18) Purified water remaining amount (19) Fragrance 0.1
(Note 5) Product name “Rafty Rose P95” manufactured by ORAFTi (Note 6) Product name “Leopard KL” manufactured by Chiba Flour Mills

(Production method)
A. Ingredients (1) to (4) are treated with a paint shaker for 10 hours.
B. Components (5) to (12) are dissolved by heating.
C. Add B to A and mix evenly.
D. Components (11) to (18) are added to C and uniformly emulsified and mixed.
E. Add component (19) to D and mix evenly to obtain a sunscreen.

The water-in-oil type emulsion sunscreen of Example 2 has a low viscosity of less than 20000 mPa · s at 30 ° C., has good usability such as light spreading and no oiliness, and over time The effect of excellent stability was realized.

Water-in-oil emulsified sunscreen without organic UV blocker (component) (%)
(1) Alkoxysilylcadimethylpolysiloxane treated fine particle zinc oxide 15.0
(2) Alkoxysilylcadimethylpolysiloxane treated fine particle titanium oxide 10.0
(3) Polyglycerin-modified silicone (Note 1) 10.0
(4) Decamethylcyclopentasiloxane 30.0
(5) Isononyl isononanoate 3.0
(6) Methylphenyldimethylpolysiloxane 3.0
(7) Liquid paraffin 1.0
(8) Silicone resin (Note 7) 2.0
(9) Inulin stearate (Note 8) 1.0
(10) Polyoxyethylene / alkyl-modified dimethylpolysiloxane (Note 3) 2.0
(11) Propylene glycol 0.5
(12) Ethanol 5.0
(13) Purified water Remaining amount (Note 7) Product name “KF-7312J” manufactured by Shin-Etsu Chemical Co., Ltd. (Note 8) Product name “Leopard ISK” manufactured by Chiba Flour Mills

(Production method)
A. Ingredients (1) to (4) are treated with a paint shaker for 10 hours.
B. Components (5) to (10) are dissolved by heating.
C. Add B to A and mix evenly.
D. Components (11) to (13) are added to C and uniformly emulsified and mixed, and filled into a container to obtain a sunscreen.

The water-in-oil type emulsion sunscreen containing no organic ultraviolet blocking agent of Example 3 has a low viscosity, good usability such as light spreading and no oiliness, and stability over time. It was an excellent effect.

Water-in-oil emulsified sunscreen (component) (%)
(1) Methyl hydrogen dimethyl polysiloxane treated fine particle titanium oxide 6.0
(2) Polyglycerin-modified silicone (Note 1) 3.0
(3) Decamethylcyclopentasiloxane 10.0
(4) Methylphenyldimethylpolysiloxane 25.0
(5) Octyl methoxycinnamate 7.5
(6) Dextrin (palmitic acid / octanoic acid) ester (Note 9) 2.0
(7) Polyoxyethylene / alkyl-modified dimethylpolysiloxane (Note 4) 2.0
(8) Ethanol 10.0
(9) Purified water remaining amount (10) Fragrance 1.0
(Note 9) Product name “Leopard TT” manufactured by Chiba Flour Mills

(Production method)
A. Ingredients (1) to (3) are treated with a paint shaker for 10 hours.
B. Ingredients (4) to (7) are heated to 85 ° C. and A is added and mixed uniformly.
C. Components (8) and (9) are added to B and uniformly emulsified and mixed.
D. Ingredient (10) was added to C and mixed uniformly and filled into a container to obtain a water-in-oil type emulsion sunscreen.

The sunscreen of Example 4 has a low viscosity of less than 20000 mPa · s at 30 ° C., good usability such as light spreading and no oiliness, and excellent stability over time. The effect was realized.

Water-in-oil emulsified sunscreen (component) (%)
(1) Alkoxysilylcadimethylpolysiloxane treated fine particle zinc oxide 30.0
(2) Polyglycerin-modified silicone (Note 1) 0.6
(3) Decamethylcyclopentasiloxane 30.0
(4) Methylphenyldimethylpolysiloxane 5.0
(5) Octyl methoxycinnamate 5.0
(6) Dextrin (palmitic acid / octanoic acid) ester (Note 9) 0.15
(7) PEG-9 polydimethylsiloxyethyl dimethicone 10.0
(8) Methyl paraben 0.5
(9) Purified water remaining amount (10) Fragrance 1.0

(Production method)
A. Ingredients (1) to (4) are treated with a paint shaker for 10 hours.
B. Ingredients (5) to (7) are heated to 85 ° C., A is added and mixed uniformly.
C. Components (8) and (9) are added to B and uniformly emulsified and mixed.
D. Ingredient (10) was added to C and mixed uniformly and filled into a container to obtain a water-in-oil type emulsion sunscreen.

The water-in-oil type emulsion sunscreen of Example 5 has a low viscosity with a viscosity at 30 ° C. of less than 20000 mPa · s, although it has a large amount of water, and has a light spread and no oiliness. The usability was good and the effect of excellent stability over time was realized.

Water-in-oil emulsified sunscreen (component) (%)
(1) Methyl hydrogen dimethyl polysiloxane treated fine particle zinc oxide 3.0
(2) Polyglycerin-modified silicone (Note 1) 3.0
(3) Polyglycerin-modified silicone (Note 10) 0.3
(4) Decamethylcyclopentasiloxane 3.0
(5) Methylphenyldimethylpolysiloxane 8.0
(6) Dimethylpolysiloxane (10 cs) 10.0
(7) Dextrin (palmitic acid / octanoic acid) ester (Note 9) 0.01
(8) Methyl paraben 0.5
(9) Purified water remaining amount (10) Fragrance 1.0
(Note 10) Product name “KF-6100” manufactured by Shin-Etsu Chemical Co., Ltd.

(Production method)
A. Ingredients (1) to (4) are treated with a paint shaker for 10 hours.
B. Ingredients (5) to (7) are heated to 85 ° C., A is added and mixed uniformly.
C. Components (8) and (9) are added to B and uniformly emulsified and mixed.
D. Ingredient (10) was added to C and mixed uniformly and filled into a container to obtain a water-in-oil type emulsion sunscreen.

The water-in-oil type emulsion sunscreen of Example 6 has a low viscosity of less than 20000 mPa · s at 30 ° C. in spite of a large amount of aqueous system, light spreading and no oiliness, etc. The usability was good and the effect of excellent stability over time was realized.

Claims (7)

The following components (A) to (E);
(A) Polyglycerin-modified silicone (B) Fine particle metal oxide 3 to 30% by mass
(C) 3-30% by mass of silicone oil
(D) Dextrin fatty acid ester and / or inulin fatty acid ester 0.01-2% by mass
(E) A water-in-oil type emulsion sunscreen comprising water and having a viscosity at 30 ° C. of less than 20000 mPa · s. The water-in-oil type emulsion sunscreen according to claim 1, wherein the blending mass ratio (B) / (A) of the component (A) and the component (B) is in the range of 1-50. 3. The water-in-oil type emulsion sunscreen according to claim 1 or 2, wherein the constituent fatty acid of component (D) has 8 to 22 carbon atoms. The water-in-oil type emulsion sunscreen according to any one of claims 1 to 3, wherein the constituent fatty acid of the dextrin fatty acid ester of component (D) is octanoic acid and / or palmitic acid. The water-in-oil type emulsion sunscreen according to any one of claims 1 to 3, wherein the constituent fatty acid of the inulin fatty acid ester of the component (D) is stearic acid. The surface of the component (B) fine particle metal oxide is treated with one or more silicone compounds selected from methylhydrogendimethylpolysiloxane copolymer or alkoxysilylated dimethylpolysiloxane. The water-in-oil type emulsion sunscreen according to any one of claims 1 to 5. The water-in-oil type emulsion sunscreen according to any one of claims 1 to 6, wherein the blending mass ratio (B) / (D) of the component (B) and the component (D) is in the range of 3 to 200.