JPH09175977A - Sun caring cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a sun caring cosmetic excellent in water resistance and durability of sun caring effect and feeling in use, comprising a silicone gel composition and/or an oil gelatinizing agent, an oil-soluble ultraviolet absorber, a water-soluble polymer and water. SOLUTION: This cosmetic comprises (A) (i) a silicone gel composition and/or (ii) an oil gelatinizing agent, (B) an oil-soluble ultraviolet absorber, (C) a water- soluble polymer and (D) water. A composition comprising an organopolysiloxane polymer obtained by subjecting an organohydrogenpolysiloxane containing two or more hydrogen atoms bonded to a silicon atom and organopolysiloxane containing two or more aliphatic unsaturated group bonded to a silicon atom to addition reaction and a low-viscosity silicone oil is preferable as the component (i). A polysaccharide fatty acid ester, etc., are preferably as the component (ii). 2-Hydroxy-4-methoxybenzophenone, etc., are preferably as the component B. Methyl cellulose, etc., may be used as the component C.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a sun care cosmetic composition, and more specifically, it has excellent water resistance and long-lasting effect.
Further, the present invention relates to a sun care cosmetic which has no stickiness or sliminess, and has a good feeling in use such as being hard to be sanded.

[0002]

Conventionally, as sun care cosmetics, sun protect cosmetics that prevent sunburn and blackening of the skin due to ultraviolet rays,
There are commercially available suntan cosmetics for evenly tanning without causing skin irritation. Among them, as sun care cosmetics containing an oil-soluble ultraviolet absorber, there are emulsion types such as emulsions and creams, and oil types represented by sun oil.

[0003]

However, in the emulsion type, since the oil-soluble ultraviolet absorber is emulsified in a water system by using a surfactant, it is reapplied with sweat or water after application on the skin. It had the drawback that it would be emulsified and run off. Therefore, there is also provided a technology of blending an ultraviolet absorber with a water-soluble polymer having a property of dispersing an oily component, but the ultraviolet absorber is used when the water-soluble polymer itself flows off due to sweat or water. It wasn't a fundamental solution as it would be washed away.

On the other hand, the oil type is more water resistant than the emulsified type and is more resistant to sweat and water, but on the other hand, it has a problem in terms of touch such as stickiness and sliminess, and also has a problem on the skin. There were drawbacks that after application, the sand was easily attached and the attached sand was difficult to remove. Therefore, it has been desired to develop a sun care cosmetic having excellent water resistance and durability of the sun care effect and having a good usability.

[0005]

In view of the above circumstances, as a result of earnest research, the present inventors have found that a silicone gel composition and / or an oil gelling agent, an oil-soluble ultraviolet absorber, a water-soluble polymer and water are contained. It was found that the sun care cosmetics are excellent in water resistance and durability of the sun care effect, and have a good usability and a good usability, and have completed the present invention.

That is, the present invention provides the following components (A) to
(D); (A) Silicone gel composition and / or oil gelling agent (B) Oil-soluble UV absorber (C) Water-soluble polymer (D) Water-containing sun care cosmetic . The details will be described below.

The component (A) is a silicone gel composition and / or an oil gelling agent. Examples of the silicone gel composition include those described in JP-A-1-207354.
That is, the following components (a) and (b); (a) Organohydrogenpolysiloxane containing at least two hydrogen atoms bonded to silicon atoms in one molecule and fat bonded to silicon atoms in one molecule A silicone gel composition comprising an organopolysiloxane polymer obtained by addition reaction with an organopolysiloxane containing at least two group unsaturated groups (b) a low-viscosity silicone oil is preferred.

The organopolysiloxane polymer in the component (a) is insoluble in silicone oil but has a property of swelling sufficiently, and the organohydrogenpolysiloxane and the organopolysiloxane containing an aliphatic unsaturated group are added. It is a polymer obtained by polymerization, and partially has a three-dimensional crosslinked structure. Examples of the organohydrogenpolysiloxane include HSiO _1.5 units, RSiO _1.5 units, RHSiO units, R ₂ SiO units, R ₂ HSiO _0.5 units, and R ₃ SiO _0.
.5 units, etc., the molecular structure of which is linear,
It may be branched or cyclic and contains at least two hydrogen atoms bonded to silicon atoms in one molecule. Among these, the organohydrogenpolysiloxane used in the present invention is preferably linear in order to control the organopolysiloxane polymer synthesis reaction.

Further, the aliphatic unsaturated group-containing organopolysiloxane used at the same time contains at least two aliphatic unsaturated groups bonded to a silicon atom in one molecule. Examples of the organopolysiloxane include vinyl groups and aryl groups, and vinyl group-containing organovinylpolysiloxanes are generally disclosed. Examples of the organovinylpolysiloxane include (CH ₂ = CH) Si.
O _1.5 units, RSiO _{1. 5 units, R (CH = CH 2)} Si
O unit, R ₂ SiO unit, R ₂ (CH = CH ₂ ) SiO _0.5
Unit, R ₃ SiO _0.5 unit, etc., and the molecular structure of this unit may be linear, branched, or cyclic, and an aliphatic unsaturated group bonded to a silicon atom in one molecule,
For example, those containing at least two vinyl groups.
Among these, the aliphatic unsaturated group-containing organopolysiloxane used in the present invention is preferably linear in order to control the organopolysiloxane polymer synthesis reaction.

Examples of the organic group R of the organohydrogenpolysiloxane include alkyl groups such as methyl group, ethyl group, propyl group and butyl group, aryl groups such as phenyl group and tolyl group, cyclohexyl group and carbon of these groups. It is an unsubstituted or substituted monovalent hydrocarbon group excluding an aliphatic unsaturated group such as a vinyl group selected from a group in which some or all of hydrogen atoms bonded to atoms are substituted with a halogen atom, a cyano group or the like. The thing is illustrated. Typical examples of such examples are (CH ₃ ) SiO— and [— (CH ₃ ) ₂ Si.
_{O-] p, [- CH 3} HSiO-] q, Si (CH 3)
_3- , (where p = 10 to 500, q = 2 to 50) is included, and methylhydrogenpolysiloxane is included, which is a material suitable for the present invention.

The organic group R of the organovinylpolysiloxane which is an organopolysiloxane containing an aliphatic unsaturated group is the R of the organohydrogenpolysiloxane.
Agree with. As a typical example of such an example,
_{(CH 2 = CH) (CH} 3) 2 SiO -, [- (CH 3) 2
_{SiO-] r, -Si (CH 3} ) 2 (CH = CH 2), ( where, r = 10 to 100) units or,, (CH _{3) 3
SiO, [- (CH 3)} 2 SiO-] m, [- (CH = C
_{H 2) CH 3 SiO-] n} , -Si (CH 3) 3, ( provided that
Examples include methylvinylpolysiloxane containing units of m = 10 to 500 and n = 2 to 50), and these may be a mixture, which is a material suitable for the present invention.

The reaction between the organohydrogenpolysiloxane and the aliphatic unsaturated group-containing organopolysiloxane is
It may be performed by a conventionally known general method. For example, when the appropriate organohydrogenpolysiloxane and the aliphatic unsaturated group-containing organopolysiloxane are used, the molar ratio of the hydroxyl group in which each reactive group is bonded to the silicon atom and the vinyl group is in the range of 1/3 to 3/1. After blending, an addition polymerization catalyst such as platinum or palladium is added, and the mixture is heated and stirred to easily obtain the desired organopolysiloxane polymer. Particularly, as the addition polymerization catalyst, chloroplatinic acid described in JP-B-33-9969 is preferably used.

On the other hand, the low-viscosity silicone oil used as the component (b) is not particularly limited, but has a viscosity of 50.
It can be suitably used as long as it is about cs or less. This is because as the viscosity becomes higher, a large amount of it is used, and as a result, a feeling of oiliness is produced, which is not preferable in terms of usability. Examples of the low-viscosity silicone oil include low-polymerization chain-like dimethylpolysiloxane, methylphenylpolysiloxane, cyclic octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and the like. It is possible to appropriately select and use one or more species.

The silicone gel composition used in the present invention can be easily prepared by sufficiently kneading the above-mentioned organopolysiloxane polymer and low viscosity silicone oil and swelling them. In this case, the mixing ratio of the organopolysiloxane polymer and the low-viscosity silicone oil is preferably 5:95 to 30: 70% by weight (hereinafter, simply "%").
), And more preferably 10:90 to 25: 75%. The content of the silicone gel composition in the sun care cosmetic of the present invention is not particularly limited, but is preferably 0.05 to 30 times the amount of the oil-soluble ultraviolet absorber, more preferably 0.2 to 15 times the amount. Is. If the amount is less than 0.05 times, the stability of the system may not be sufficiently obtained,
Further, if it is blended in an amount exceeding 30 times, the spreadability on the skin may be deteriorated.

On the other hand, examples of the oil gelling agent include metal soaps such as aluminum stearate and magnesium stearate, polysaccharide fatty acid esters such as sucrose palmitate ester, starch palmitate ester, and bakumondoustearate ester, and monoesters. Examples thereof include organic modified clay minerals such as alkyl trimethyl ammonium salt-modified montmorillonite and dialkyl dimethyl ammonium salt modified montmorillonite, and hydrophobic silicic anhydride such as alkyl modified silicic anhydride. Among these, polysaccharide fatty acid esters,
One or more selected from organically modified clay minerals and hydrophobic silicic acid anhydride are preferable. The content of the oil gelling agent is not particularly limited, but is preferably 0.01 to 30 times the amount of the oil-soluble ultraviolet absorber, more preferably 0.1 to 10 times.
Double the amount. If the amount is less than 0.01 times, the stability of the system may not be sufficiently obtained, and if it exceeds 30 times, the spread to the skin may be deteriorated.

The component (B) is an oil-soluble ultraviolet absorber. As the oil-soluble ultraviolet absorber, for example, octyl paramethoxycinnamate, oxybenzone, 4-tert-butyl-4′-methoxybenzoylmethane, ethyl paraaminobenzoate, octyl paradimethylaminobenzoate,
Examples thereof include benzophenone and tetrahydroxybenzophenone, and one kind or two or more kinds of these can be appropriately mixed. Among these, octyl paramethoxycinnamate, oxybenzone, 4-tert-butyl-4′-
Methoxybenzoylmethane is preferred. The content of the component (B) is not particularly limited, but is preferably 0.1 to 30.
%, More preferably 1 to 15%. If it is less than 0.1%, the sun care effect may not be sufficiently obtained, and if it exceeds 30%, safety problems may occur.

The component (C) is a water-soluble polymer. Examples of the water-soluble polymer include carboxyvinyl polymer, methylcellulose, ethylcellulose, carboxymethylcellulose, carboxyethylcellulose, xanthan gum, carrageenan, polyvinyl alcohol, water-soluble bentonite, quince seed, alginate, and the like, or one or two of them. The above can be blended appropriately. The content of the component (C) is not particularly limited, but is preferably 0.01 to 10%, more preferably 0.
It is 05 to 5%. If it is less than 0.01%, the stability of the system may not be sufficiently obtained, and if it is more than 10%, the spread to the skin may be deteriorated.

The content of water as the component (D) is preferably 3
It is 0 to 95%, more preferably 50 to 80%.

The sun care cosmetic of the present invention can be obtained by containing the above-mentioned essential components, and more preferably,
When a silicone gel composition is used as the component (A),
It is preferable to incorporate silicone oil and / or perfluoropolyether as the water-insoluble component. By blending these water-insoluble components, the water resistance can be improved, and the stickiness and the slimyness can be further reduced, and the feel during use can be further improved.

As the method for producing the sun care cosmetic of the present invention, the components (A) and (B), and optionally an oil system containing the above water-insoluble component or oil agent, and components (C) and (D) A method is preferred in which each of the water systems containing is mixed and prepared, and the oil system is mixed and dispersed in the water system. Further, the sun care cosmetic of the present invention preferably contains substantially no surfactant having an HLB value of 7 to 18. Thereby, the effect of the present invention can be more remarkably exhibited.

The sun care cosmetics of the present invention include, in addition to the above-mentioned essential components, components that are generally added to cosmetics, such as oils, surfactants, powders, preservatives, pigments, fragrances, cosmetic ingredients and moisturizers. Can be used within a range that does not impair the effects of the present invention.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION The sun care cosmetic of the present invention can be used as a sun protect cosmetic or a suntan cosmetic, and can be used in various forms such as liquid, emulsion, cream and gel.

[0023]

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

Preparation of Silicone Gel Composition Reference Example A trimethylsilyl end-blocked dimethylmethylhydrogenpolysiloxane (average molecular weight 2280, Si-H: 3.1 mol%) was added to a planetary mixer having an internal volume of 5 l.
85 g, dimethylvinylsilyl end-capped dimethyldiphenylpolysiloxane (average molecular weight 5720, Si-V
i: 1.8 mol%, Si-phenyl: 23 mol%) 71
5g, and methylphenyl polysiloxane (viscosity 15c
St, phenyl group: 28 mol%) 1000 g,
0.5 g of an isopropanol solution containing 2% chloroplatinic acid was added, and stirring was continued at 70 to 80 ° C. for 2 hours. The obtained polymerization product was a powder having white flexibility. This was sufficiently kneaded with a triple roll and swollen to obtain a silicone gel composition.

Examples 1 to 10 and Comparative Examples 1 to 8 Sun care cosmetics having the compositions shown in Tables 1 and 2 were produced, and the following items were evaluated.

[0026]

[Table 1]

[0027]

[Table 2]

(Production Method) A: The components 1 to 6 are uniformly mixed to prepare an oil-based gel. B: Components 7 to 13 are uniformly mixed to prepare an aqueous gel. C: A was added to and mixed with B to obtain a sun care cosmetic.

(Evaluation Method) Suncare effect An appropriate amount of the test sample was applied to the back of the subject, and the applied portion and the unapplied portion were irradiated with ultraviolet rays for 2 hours using an ultraviolet lamp. After the irradiation, the applied sample was washed away, and the skin condition of each irradiated portion was visually compared and observed by a professional evaluator, and the sun care effect of the test sample was evaluated according to the following evaluation criteria. [Evaluation] [Content] ⊚: Remarkably effective (remarkably effective). ◯: Effective (effect is recognized). Δ: Slight effect (slight effect is recognized). X: Ineffective (effect not observed or worsened).

2. Sensory evaluation 11 panelists evaluated the water resistance, non-greasiness, and non-stickiness of sand on a 5-point scale.
Further, it was judged from the average score. [Evaluation] [Contents] 5 points: Very good. 4 points: good. 3 points: Normal. 2 points: Somewhat poor. 1 point: defective. [Judgment] ：: Average score of 4.5 or more. ：: Average score of 3.5 or more and less than 4.5. Δ: Average score of 2.5 or more and less than 3.5. ×: Average point less than 2.5 points.

3. Stability evaluation The state after the above sun care cosmetics were left at room temperature for 4 weeks was visually observed. Things that did not change ◎,
Those that caused changes such as separation were evaluated as x. Table 3 shows the obtained results.

[0032]

[Table 3]

As is clear from the above evaluation results, Examples 1 to 6 according to the present invention were excellent in both sun care effect and sensory evaluation. On the other hand, in Comparative Examples 1 to 6, those satisfying all the evaluation items were not obtained.

Example 11 Sun Care Cosmetic (Component) (%) 1. Dextrin palmitate 1.0 2. Octyl paramethoxycinnamate 6.0 3. Liquid paraffin 10.0 4. Glyceryl tri-2-ethylhexanoate 5.0 5. Xanthan gum 2.0 6. Dipropylene glycol 15.0 7. Preservative appropriate amount 8. Appropriate amount of flavor 9. Purified water balance

(Manufacturing Method) A: Components 1 to 4 are uniformly heated and mixed, and cooled to obtain an oil-based gel. B: Components 5 to 9 are uniformly mixed to obtain an aqueous gel. C: A was added to and mixed with B to obtain a sun care cosmetic. In Example 11, the water resistance was good, the sun care effect was excellent, and the feeling of use was also good.

Example 12 Sun Care Cosmetic (Component) (%) 1. Dimethyl distearyl ammonium modified hectorite 2.0 2.4-tert-butyl-4'-methoxybenzoylmethane 1.0 3.2 Cetyl 2-ethylhexanoate 10.0 4. Liquid paraffin 5.0 5. Methylcellulose 1.0 6. Carboxymethyl cellulose sodium 1.0 7. Ethanol 15.0 8. Glycerin 3.0 9. Preservative appropriate amount 10. Appropriate amount of fragrance 11. Appropriate amount of dye 12. Antioxidant appropriate amount 13. Purified water balance

(Manufacturing Method) A: Components 1 to 4 are uniformly heated and mixed, and cooled to obtain an oil-based gel. B: Components 5 to 13 are uniformly mixed to obtain an aqueous gel. C: A was added to and mixed with B to obtain a sun care cosmetic. Example 12 was excellent in usability and water resistance, and was excellent in the tanning effect of beautifully tanning the skin after sunburn without causing inflammation.

Example 13 Sun Care Cosmetic (Component) (%) 1. Silicone gel composition (reference example) 5.0 2. Octyl paramethoxycinnamate 5.0 3. Oxybenzone 0.5 4. Methylphenyl polysiloxane 5.0 5. Perfluoropolyether 2.0 6. Carboxyvinyl polymer 0.2 7. Methylcellulose 0.1 8. Sodium hydroxide (1% aqueous solution) 5.0 9. Ethanol 15.0 10. Appropriate amount of fragrance 11. Preservative appropriate amount 12. Purified water balance

(Production Method) A: Oil-based gel is obtained by uniformly mixing components 1 to 5. B: Components 6 to 12 are uniformly mixed to obtain an aqueous gel. C: A was added to and mixed with B to obtain a sun care cosmetic. In Example 13, the water resistance was good, the sun care effect was excellent, and the feeling of use was also good.

[0040]

EFFECTS OF THE INVENTION The sun care cosmetic composition of the present invention has excellent water resistance and thus is excellent in sustainability of the effect and has a good feeling of use in which stickiness and sliminess are suppressed.

Claims (11)

[Claims] 1. The following components (A) to (D); (A) silicone gel composition and / or oil gelling agent (B) oil-soluble ultraviolet absorber (C) water-soluble polymer (D) water A sun care cosmetic characterized by containing. 2. The silicone gel composition in component (A) comprises:
The following components (a) and (b): (a) Organohydrogenpolysiloxane containing at least two hydrogen atoms bonded to silicon atoms in one molecule, and an aliphatic non-organic polysiloxane bonded to silicon atoms in one molecule. The sun gel cosmetic composition according to claim 1, which is a silicone gel composition comprising an organopolysiloxane polymer (b) a low-viscosity silicone oil obtained by addition-reacting with an organopolysiloxane having at least two saturated groups. Fee. 3. The oil gelling agent in component (A) is one or more selected from organically modified clay minerals, polysaccharide fatty acid esters, and hydrophobic silicic acid anhydride. 2. The sun care cosmetic according to any one of 2. 4. The component (B) is one or more selected from octyl paramethoxycinnamate, oxybenzone, and 4-tert-butyl-4′-methoxybenzoylmethane. The sun care cosmetic according to any one of 1. 5. The component (C) is carboxyvinyl polymer, methyl cellulose, carboxymethyl cellulose,
One or more selected from xanthan gum, The sun care cosmetic according to any one of claims 1 to 4, characterized in that 6. The sun care cosmetic according to any one of claims 1 to 5, wherein the content of the component (B) is 0.1 to 30% by weight. 7. The sun care according to any one of claims 1 to 6, wherein the content of the silicone gel composition as the component (A) is 0.05 to 30 times the amount of the component (B). Cosmetics. 8. The content of the oil gelling agent as the component (A) is
The amount of the component (B) is 0.01 to 30 times, and the sun care cosmetic according to any one of claims 1 to 7, which is characterized in that. 9. A sun care cosmetic characterized in that it further contains silicone oil and / or perfluoropolyether in addition to the components of claims 1-8. 10. The component (A) and the component (B) are mixed, and this is mixed and dispersed in a mixture containing the component (C) and the component (D). Suncare cosmetics described in. 11. The sun care cosmetic according to claim 1, which is substantially free of a surfactant having an HLB value of 7-18.