JPS62234012A - Anti-suntan cosmetic - Google Patents

Abstract

PURPOSE:To obtain the titled cosmetic by compounding a specific silicone polymer free from UV-absorbing effect in itself in combination with a volatile silicone oil and/or a volatile hydrocarbon oil in addition to an UV-absorber and/or UV-scattering agent. CONSTITUTION:The objective anti-suntan cosmetic having improved anti-suntan effect is produced without increasing the amount of UV-absorber and UV- scattering agent, by adding (A) one or more kinds of organic silicone polymers selected from organic silicone polymer containing two or more kinds of structural units of formula (R is 1-6C hydrocarbon group, phenyl or H) or organic silicone polymer produced by blocking the terminal of the above polymer with RSiO1/2 (the average molecular weight of the polymer is preferably 1,500-50,000), (B) a volatile hydrocarbon oil having a boiling point of <=260 deg.C under normal pressure and/or a volatile silicone oil and/or a volatile hydrocarbon oil and (C) an UV-absorber or an UV-scattering agent.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a sunburn prevention cosmetic. More specifically, the present invention relates to an improved sun protection cosmetic that is effective in preventing skin erythema and darkening caused by ultraviolet rays of the sun, is easy to use, and does not cause skin irritation.

[Conventional technology] Among the ultraviolet rays of sunlight, wavelengths of medium wavelength ultraviolet 280~
320 nm causes erythema called sampane on the skin and even causes blisters similar to burns. It is also known that long-wavelength ultraviolet wavelengths of 320 to 400 nm cause skin darkening, and that repeated effects over long periods of time accelerate skin aging.

In order to cope with this problem, cosmetics containing ultraviolet absorbers that absorb medium-wavelength ultraviolet rays and/or ultraviolet scattering agents that scatter ultraviolet rays have been used. And to obtain more effective sun protection effect, UV absorber or/
Attempts to increase the amount of ultraviolet scattering agents* have been unsuccessful.

[Problems to be solved by the invention] However, most UV absorbers have skin irritation properties, and repeated application of products containing large amounts can cause skin irritation and pigmentation. Sometimes I put it away. Therefore, although it is effective to prevent blistering and erythema caused by ultraviolet rays by incorporating a large amount of ultraviolet absorber, it is not preferable.

In addition, if a large amount of ultraviolet scattering agent is added, it is not preferable because it significantly impairs the usability such as spreadability, and when it is applied to the skin, it cannot be applied evenly and causes uneven tanning.

In view of these circumstances, the present inventors have conducted extensive research with the aim of increasing the sunburn prevention effect without increasing the amount of UV absorbers and/or UV scattering agents. In addition to absorbers and/or ultraviolet scattering agents, by incorporating into cosmetics a specific organic silicone polymer that itself does not have an ultraviolet absorbing effect, together with volatile silicone oil and/or volatile hydrocarbon oil, It was discovered that the UV protection effect was significantly increased and the water resistance was further improved, and based on this knowledge, the present invention was completed.

[Means for solving the interlayer point J] That is, the present invention comprises an organic silicone polymer shown below (A) and a volatile hydrocarbon oil or/and volatile silicone oil having a boiling point of 260° C. or lower at normal pressure. The present invention provides a sunburn prevention cosmetic characterized by blending a volatile hydrocarbon oil and/or an ultraviolet absorber or/and an ultraviolet scattering agent.

(A) S i 02, R31O372, R2S i
An organic silicone polymer containing two or more types of structural units of 01 (R represents a hydrocarbon group having 1 to 6 carbon atoms, a phenyl group, or hydrogen), or its terminal is RS i
03/2 One or more organic silicone polymers selected from the group consisting of organic silicone polymers blocked with (R represents a hydrocarbon group having 1 to 6 carbon atoms, a phenyl group, or hydrogen).

The organic silicone polymer represented by (A) above used in the present invention can be easily obtained by hydrolytic condensation of corresponding known silanes. S s 021
RS 103/21 R2S iOs R35i0+
The composition ratio of /2 units and degree of polymerization can be changed depending on the purpose of use, but the average molecular weight is 1,500 to 50,000.
A range of is preferred. For example, SiO2 unit and (CH3)
If you combine 3S i 01/2 units, the following (I)
A polymer as shown in the formula is obtained.

Also, (CH3)2S i O unit and C5HsS i 0
By combining 3/□ units, a polymer as shown by the following formula (II) can be obtained.

In the present invention, one or more of the above organic silicone polymers may be selected and used.

The volatile silicone oil (B) used in the present invention is, for example, one represented by the following formula (III) or (IV).

(Left space below) (II) Formula (In the formula, n represents an integer of 0 to 3.) (III) Formula (In the formula, n represents an integer of 3 to 6.) (M formula and volatile The hydrocarbon oil has a boiling point of 260°C or less at normal pressure, such as Isopar (registered trademark) A1, c1, D1, E1, "G1, H1, L1, M (Exxon), Scherzol ( Registered trademark)7
1 (Shell), Tsurutrol (registered trademark) 100,
Examples include 1301 and 220 (Philip Co.).

Both the silicone oil and the hydrocarbon oil are volatile and can serve as a solvent for the organic silicone copolymer.

In the present invention, one or more of these volatile oils may be selected and used.

As the ultraviolet absorber and ultraviolet scattering agent used in the present invention, all known ultraviolet absorbers and ultraviolet scattering agents can be effectively used. Naturally, a plurality of ultraviolet absorbers and/or ultraviolet scattering agents can also be blended.

Representative ultraviolet absorbers are listed below.

As aromatic acid-based ones, aminobenzoic acid (hereinafter abbreviated as PABA) glyceryl PABA ethyldihydroxypropyl PABA N-ethoxylate PABA ethyl ether N-dimethyl PABA ethyl ether N-dimethyl PABA butyl ether N-dimethyl PABA amyl ether Octyldimethyl PABA As an anthranilic acid type, Homomenthyl-N-acetylanthranilate as a salicylic acid type, Amyl salicylate Menthyl salicylate Octyl salicylate Phenyl salicylate Penzyl salicylate P-Isobrobanol Phenyl salicylate As a cinnamic acid type , Octyl cinnamate ethyl-4-isopropyl cinnamate ethyl-2,4
-Diisobuvircinnamate methyl -2,4-diisopropylcinnamatepropyl -P-methoxycinnamateisoprovil -P-methoxycinnamateisoamyl-
P-methoxycinnamate octyl methoxycinnamate 2-ethoxyethyl-P-methoxycinnamate cyclohexyl-P-methoxycinnamate ethyl-α
-Cyano-β-phenylcinnamate 2-ethylhexyl-α-cyano-β-phenylcinnamate glyceryl mono-2-ethylhexanoyl diparamethoxycinnamate 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 2-hydroxy-4- Methoxy-4'-methylbenzophenone 4-phenylbenzophenone 2-ethylhexyl-4'-phenyl-benzophenone-2-carboxylate 2-hydroxy-4-n-octoxybenzophenone 4-hydroxy-3-carboxybenzophenone Others as 3-(4°-methylbenzylidene)-d,l-camphor 3-benzylidene-d,l-camphor-urocanic acid urocanic acid ethyl ester 2-phenyl-5-methylbenzoxazole 2.2'-
Hydroxy-5-methylphenyl-benzotriazole 2-(2'-hydroxy-5-t-oc≠ruphenyl)
-benzotriazoledibenzalazinedibenzoylmethane 4-methoxy-4°-t-butyl-dibenzoylmethane 5-(3,3-dimethyl-2-norbornylidene)-3
-pentan-2-one chalcone derivatives and the like.

Moreover, the following can be mentioned as typical ultraviolet scattering agents.

Fine particles of titanium oxide Titanium oxide Zinc iron oxide Fine particles of iron oxide The type of the cosmetic of the present invention is arbitrary, and any product type such as oil, lotion, milky lotion, cream, oily stick, oily foundation, etc. is possible.

The appropriate mixing ratio of the essential components is as follows.

In other words, although it differs depending on the intended product type, organic silicone polymers account for 1 to 1 Hw of the total amount of sunburn prevention cosmetics.
t%, volatile silicone oil or/and volatile hydrocarbon oil is 1 to 99 wt%. When the amount of volatile silicone oil and/or volatile hydrocarbon oil is large, it takes on the form of a solution, and as the amount of the organic silicone polymer increases, it becomes solid.

In addition, the amount and combination of UV absorbers and/or UV scattering agents are determined depending on the desired sunburn prevention effect, but considering the sunburn prevention effect, it is 0.005wt%.
The above is necessary. The upper limit varies depending on the usability and skin safety, but for example, for homomenthyl salicylate, 1
5 wt%, octyl methyl PABA is 8 wt%, and titanium oxide is 80%.

In addition to the above, the sunburn prevention cosmetics of the present invention may include, depending on the purpose, oils and fats, waxes, drugs, extender pigments, and colorings within a quantitative and qualitative range that does not impair the effects of the present invention. Pigments, plasticizers, fragrances, or other volatile components may also be added.

[Example] Hereinafter, the present invention will be explained in detail with reference to Examples. The present invention is not limited by these. All blending amounts are wt%.

Example 1 Sunscreen oil 1) Dimethylsiloxane 1cs (n=1) 10.0
2) Dimethylsiloxane 2cs (n=3) 1
3.03) Organic silicone polymer *65, 04)
Glyceryl triisostearate 10.05) Octyldimethyl P A B A 2.0*(C)1
3) 3si0□72 units' (CsHshSiO units:
(CH3)5i03z. Unit: sio. Unit = 0.9:
An organosilicone with an O,C0,2:1 ratio and an average molecular weight of about 2000.

5 was dissolved in 4 at 80°C, and the cooled mixture was mixed with a solution obtained by stirring and dissolving 1 to 3, and the mixture was filled into a container to obtain a sunscreen oil.

Comparative Example 1 Sunscreen oil in which 1 to 3 of Example 1 were replaced with glyceryl triisostearate.

Example 2 Oil-based foundation 1) Kaolin 25. .

2) Fine particle titanium oxide 15.03)
Iron oxide 3.04) Microcrystalline wax 4.05) Liquid paraffin 5.06) Sorbitan sesquiolate 1.07) Organic silicone polymer*
2. .

8) Isopar (registered trademark) G 45.09
) Fragrance: Appropriate amount 10) Antioxidant: Appropriate amount” (CH3hSi
0172 units: 5i02 units = 1.5:1 Organic silicone with an average molecular weight of about 4000.

After stirring and dissolving 4 to 8 and 10 at 70°C to 80°C, 1 to 3 are added and dispersed. After degassing, 9 was added and filled into a predetermined container to obtain an oil-based foundation.

Comparative Example 2 Oil-based foundation Example 2, except that 7 and 8 were replaced with liquid paraffin.

Example 3 Sunscreen emulsion 1) Cyclic dimethylsiloxane (n=5) 10.0
2) Organic silicone polymer *20, 03) Liquid paraffin 4.04) Sorbitan diisostearate 3.05) Polyoxyalkylene-modified organopolysiloxane 3.0 6) Ion-exchanged water 47.07)
Glycerin 3.08) Particulate iron oxide 5.09) Octyldimethyl PABA 2.010) 4-methoxy-4°-t-butyl-dibenzoylmethane 2.011) Preservative appropriate amount 12) Antioxidant appropriate amount 13) Fragrance
Appropriate amount*(CH3)3si01/2
Unit: 5i02 unit = 0.8: Ite average molecular weight approximately 100
Organic silicones 1 to 5 and 9.10.12.13 of 00 are stirred and dissolved at 70°C, and 8 is dispersed therein. 6, 7.11, which had been mixed and dissolved at 70°C, were added to this, and after emulsification and dispersion, the mixture was cooled to obtain the desired emulsion.

Comparative Example 3 A sunscreen emulsion in which 1 and 2 of Example 3 were replaced with liquid paraffin.

Example 4 Makeup base 1) Dimethylsiloxane 2cs (n=3) 14
．． 02) Organic silicone polymer *5. .

3) Glyceryl triisostearate 10.04)
Isopar (registered trademark) G 5.05) Sorbitan sesquiolate 1.06) Polyoxyalkylene-modified organopolysiloxane 3.07) Ion-exchanged water 45.08) 1.3
Butylene glycol 5.09) Particulate titanium oxide 10.010) Octyldimethyl P A B A 2.011) Preservative
Appropriate amount 12) Antioxidant
Appropriate amount 13) Fragrance
Appropriate amount::: (CH3)+SiO unit: C
6H55i0273 units = 1:0.5, average molecular weight approximately 5
0000 organic silicone.

1 to 6 and 10.12.13 were stirred and dissolved at 70°C,
7 and 8.12, which had been previously dissolved at 70°C, were added to this, and after emulsification and dispersion, the mixture was cooled to obtain the desired makeup base.

Example 5 Liquid blusher 1) Methylphenylpolysiloxane 10.02)
Decamethylcyclopentasiloxane 49.03) Solid paraffin 4.04) Microcrystalline wax 3.05) Sorbitan sesquiolate 1.06) Organic silicone polymer *30, 0
7) Mica 15. .

8) Titanium dioxide 2.09) Iron oxide 2.010) Red 2
No. 26 1.011) Octyldimethyl PABA 1.012) 4-methoxy-4
°-t-Butyl-dibenzoylmethane 1
．． 013) Antioxidant appropriate amount 1
4) Appropriate amount of fragrance* (C
H3) 3siot/z unit' (CH3) 2siO unit: (CL) Si03/2 unit: 5i02 unit = 0.6
:0.1:0.2:0.7 and has an average molecular weight of about 1500.

1 to 6 and 11 to 13 are mixed and dissolved at 70 to 80°C. Separately, mix and grind 7 to 10. Both were stirred and mixed, and after degassing, 14 was added to obtain a liquid blusher.

The above three examples and three comparative examples were subjected to SP using animals.
The sunburn prevention effect was evaluated using the F measurement method.

That is, a sample is applied to a guinea pig whose back hair has been removed using a hair removal cream at a concentration of 2 μl/cm 2 . 15
After a few minutes, ultraviolet rays were irradiated using 12 Toshiba FL-3E lamps. 24 hours after irradiation, observe the erythema on the sample-applied area and the sample-unapplied area, and determine the minimum amount of ultraviolet rays required to cause faint erythema. From the obtained minimum amount of ultraviolet rays, calculate S P F (Sun Protecti) according to the formula below.
on Factor) The results are shown in Table 1.

(Margins below) Table 1: Erythema on the skin at the application site Table 1 Based on the results of this experiment, it was found that an organic silicone polymer and a volatile silicone oil or/and a volatile hydrocarbon oil were blended together with a UV absorber or/and a UV scattering agent. It was demonstrated that the example has a significantly increased UV protection effect compared to the comparative example.

Furthermore, practical use tests were conducted for Examples 1, 2, 3, 4, and 5 on the roof of our laboratory (Kohoku Ward, Yokohama) in August.

In addition to the sunburn prevention effect, the test items examined the primary blackening prevention effect caused by long wavelength ultraviolet rays.

As a result, each group using these five cases not only showed an effect of preventing high sunburn, but also significantly suppressed darkening.

Furthermore, when applied to the skin, it did not become uneven and the usability was greatly improved.

[Effects of the Invention] The sunburn prevention cosmetic of the present invention has an excellent sunburn prevention effect, is safe to the skin, has a good feel when used, and is free from problems such as uneven tanning.

Claims (1)

[Claims] (1) An organic silicone polymer represented by (A) below,
It is characterized by being made by blending a volatile hydrocarbon oil or/and a volatile silicone oil or/and a volatile hydrocarbon oil with a boiling point of 260°C or less at normal pressure, and an ultraviolet absorber or/and an ultraviolet scattering agent. Sun protection cosmetics. (A) SiO_2, RSiO_3_/_2, R_2Si
O, (R represents a hydrocarbon group having 1 to 6 carbon atoms, a phenyl group, or hydrogen), or an organic silicone polymer containing two or more structural units of One or more organosilicon polymers selected from the group consisting of organosilicon polymers blocked with up to 6 hydrocarbon groups or phenyl groups or hydrogen.