JP2010215602A - O/w type sunscreen cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an O/W type sunscreen cosmetic excellent in preservation stability and good in sense of use. <P>SOLUTION: The O/W type sunscreen cosmetic includes (A) a (sodium acrylate/acryloyldimethyltaurine) copolymer, (B) zinc oxide and/or titanium oxide, (C) a silicone oil, and (D) glycyrrhizinic acid, glycrrhezinic acid or a salt thereof. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sunscreen cosmetic, and more particularly to an O / W sunscreen cosmetic that has a good feeling of use and excellent stability.

  Conventionally, as sunscreen cosmetics, pigments such as zinc oxide and titanium oxide, and W / O type sunscreen cosmetics mainly composed of oil have been used. W / O-type sunscreen cosmetics have excellent pigment dispersibility and a high sunscreen effect, but have the disadvantage that whiteness of the pigment, twisting, and stickiness due to oil are produced, making it difficult to obtain a high feeling of use. Had. Therefore, for the purpose of obtaining a high feeling of use, an O / W-based formulation has been studied. However, in the O / W-based system, the pigment aggregates and precipitates over time, or the viscosity increases or decreases extremely. However, the storage stability was poor. For this reason, research on combining acrylic acid polymers and zinc oxide has been carried out (for example, see Patent Document 1). In addition, since acrylic acid-based polymers are sticky and have poor usability, researches are being conducted in combination with silicone oils or in combination with other polymer thickeners (for example, see Patent Documents 2 and 3). However, development of O / W type sunscreen cosmetics with good storage stability and high usability has been further desired.

JP 2005-272389 A JP 2007-169184 A Japanese Patent Laid-Open No. 2003-300856

  In the above circumstances, there has been a demand for an even better sunscreen cosmetic. That is, an object of the present invention is to provide an O / W type sunscreen cosmetic that is excellent in storage stability and excellent in feeling of use.

  In view of the above circumstances, as a result of intensive studies, the present inventor has obtained an oily component containing zinc oxide and / or titanium oxide and silicone oil, and a gel composition containing a (sodium acrylate / acryloyldimethyltaurine) copolymer. It was found that an O / W-type sunscreen cosmetic with high stability and high usability can be obtained by emulsifying the composition and further containing glycyrrhizinate, thereby completing the present invention.

  That is, the first present invention comprises (A) (sodium acrylate / acryloyldimethyltaurine) copolymer, (B) zinc oxide and / or titanium oxide, (C) silicone oil, and (D) glycyrrhizic acid, glycyrrhetic acid or O / W sunscreen cosmetics containing these salts. Moreover, 2nd this invention exists in the said O / W type sunscreen cosmetics which contain (E) xanthan gum further.

  According to the present invention, in an O / W type sunscreen cosmetic, it is possible to achieve excellent storage stability, good stretch and skin familiarity, and a good feeling of use without feeling sticky.

  The configuration of the present invention will be described below. The (A) component (sodium acrylate / acryloyl dimethyl taurine) copolymer used in the present invention is an international cosmetic inorganic dictionary described as “SODIUM ACRYLATE / ACRYLOYLDIMETHYL TAURATE COPOLYMER”. It is a copolymer. As a commercial product containing the polymer, there is SIMULGEL EG (manufactured by SEPPIC) containing 37.5% by mass of (sodium acrylate / acryloyldimethyltaurine) copolymer and isohexadecane, polysorbate 80 and water as other components. This can be preferably used.

  The content of the component (A) in the present invention is preferably in the range of 0.03 to 3.0% by mass (hereinafter simply abbreviated as “%”), based on the total amount of the O / W type sunscreen cosmetic. Preferably it is 0.1 to 2.0%. Within these ranges, it is possible to obtain more excellent storage stability and better usability.

  The zinc oxide and titanium oxide used as the component (B) in the present invention will be described. Zinc oxide is not particularly limited as long as it is usually used as a raw material for cosmetics, and is not limited to an average particle diameter and shapes such as a spherical shape, a rod shape, a spindle shape, a needle shape, and an indefinite shape. . Furthermore, what surface-treated them may be used. Surface treatment methods include silicone treatment with methylhydrogenpolysiloxane, methylpolysiloxane, etc., silane treatment with triethoxysilane, etc., fluorine treatment with perfluoroalkyl phosphate ester, perfluoroalcohol, etc., N-acyl glutamic acid, etc. An amino acid process, a lecithin process, a metal soap process, a fatty acid process, an alkyl phosphate ester process etc. are mentioned, These can be used individually by 1 type or in combination of 2 or more types.

  Titanium oxide is not particularly limited as long as it is usually used as a cosmetic raw material, and has an average particle size, spherical shape, rod shape, spindle shape, needle shape, irregular shape, anatase type, rutile type, brookite type, etc. The crystal type is not limited. Furthermore, what surface-treated them may be used. Surface treatment methods include silicone treatment with methylhydrogenpolysiloxane, methylpolysiloxane, etc., silane treatment with triethoxysilane, etc., fluorine treatment with perfluoroalkyl phosphate ester, perfluoroalcohol, etc., N-acyl glutamic acid, etc. Examples include amino acid treatment, lecithin treatment, metal soap treatment with aluminum stearate, zinc stearate, fatty acid treatment, alkyl phosphate ester treatment, and the like, and these can be used alone or in combination of two or more.

  The content of the component (B) in the present invention is preferably in the range of 0.1 to 30%, more preferably 1 to 15%, based on the total amount of the O / W type sunscreen cosmetic. Within these ranges, the UV protection effect is more excellent, and more preferable results are obtained in terms of storage stability.

The silicone oil which is the component (C) used in the present invention is not particularly limited as long as it is usually used as a cosmetic raw material. For example, dimethylpolysiloxane, methylphenylpolysiloxane, methyl which is liquid at 25 ° C. Examples thereof include linear or cyclic silicone oils such as hydrogen polysiloxane, decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, dodecamethylcyclohexasiloxane, and tetramethyltetrahydrogencyclotetrasiloxane. Of these, decamethylcyclopentasiloxane is particularly preferably used because of its excellent usability. In the present invention, the liquid state refers to those having a viscosity of 1 × 10 ⁻² m ² / s (10000 cSt) or less as measured with a B-type viscometer at 25 ° C.

  The content of the component (C) in the present invention is preferably in the range of 0.1 to 20%, more preferably 1 to 10%, based on the total amount of the O / W sunscreen cosmetic. Within these ranges, a dry feel with a reduced stickiness can be obtained, and more favorable results can be obtained in terms of storage stability.

  Further, when the blending amount of the entire aqueous phase including the component (C) including the silicone oil is set to 1 or more, if the blending amount of the entire aqueous phase is 2 or more, there is no stickiness that is characteristic of the O / W type preparation. It is preferable because a high usability can be obtained.

  The component (D) used in the present invention is glycyrrhizic acid, glycyrrhetinic acid or a salt thereof. Examples of the salt include dipotassium salt and ammonium salt. In the present invention, dipotassium glycyrrhizinate and ammonium glycyrrhizinate are preferably used. The content of the component (D) in the present invention is preferably in the range of 0.01 to 1.0%, more preferably 0.05 to 0.3%, based on the total amount of the O / W type sunscreen cosmetic. It is. If it is in these ranges, more excellent in terms of storage stability and feel can be obtained.

  In the O / W type sunscreen cosmetic of the present invention, the feeling of use and stability are improved by further blending xanthan gum as the component (E). The content is preferably 0.01 to 5%, more preferably 0.05 to 1%, based on the total amount of the O / W type sunscreen cosmetic.

  In addition to the above essential components, the O / W type sunscreen cosmetic of the present invention can have a higher UV protection effect by blending with an organic UV absorber. Examples of the organic ultraviolet absorber used in the present invention include benzyl paramethoxycinnamate, 2-ethylhexyl paramethoxycinnamate, 2-ethoxyethyl paramethoxycinnamate, and mono-2 diparamethoxycinnamate. -Cinnamic acid UV absorbers such as glyceryl ethylhexanoate, isopropyl paramethoxycinnamate / diisopropyl cinnamate ester, hydroxymethoxybenzophenone, hydroxymethoxybenzophenonesulfonic acid, sodium hydroxymethoxybenzophenonesulfonate, dihydroxymethoxybenzophenone Benzophenone UV absorbers such as sodium dihydroxymethoxybenzophenone disulfonate, dihydroxybenzophenone, tetrahydroxybenzenediphenone, paraaminobenzoic acid, paraaminobenzoic acid Benzoate-based UV absorbers such as ethyl, glyceryl paraaminobenzoate, amyl paradimethylaminobenzoate, octyl paradimethylaminobenzoate, ethyl 4- [N, N-di (2-hydroxypropyl) amino] benzoate, Salicylic acid ultraviolet absorbers such as ethylene glycol salicylate, phenyl salicylate, octyl salicylate, benzyl salicylate, p-tert-butylphenyl salicylate, homomenthyl salicylate, 2,4,6-trianilino-p- (carbo-2'-ethylhexyl-1) Triazine-based ultraviolet absorbers such as' -oxy) -1,3,5-triazine, 4-tert-butyl-4'-methoxydibenzoylmethane, oxybenzone, menthyl anthranilate, 2- (2-hydroxy-5-methyl) Phenyl) benzotri Tetrazole, dimethoxybenzylidene ethylidenedioxy oxoimidazolidine propionic acid 2-ethylhexyl, include 2-phenylbenzimidazole-5-sulfonic acid and the like, can be blended in combination singly or two or more. The preferable content of these organic ultraviolet absorbers is 0.1 to 10% based on the total amount of the O / W type sunscreen cosmetic.

  In addition to the above components, the O / W type sunscreen cosmetics of the present invention include cetanol, behenyl alcohol, stearyl alcohol, isostearyl alcohol, lauryl within the quantitative range that does not impair the effects of the present invention depending on the purpose. Higher alcohols such as alcohol, hexadecyl alcohol, octyldodecanol, fatty acids such as stearic acid, myristic acid, isostearic acid, oleic acid, undecylenic acid, octyldodecyl myristate, cetyl palmitate, myristyl myristate, hexyl laurate Decyl oleate, isopropyl myristate, hexyl decyl dimethyloctanoate, glyceryl monostearate, glyceryl trioctanoate, diethyl phthalate, ethylene glycol monostearate, octyl oxystearate, etc. Esters, sterols such as cholesterol and phytosterols, branched fatty acid cholesterol esters, macadamia nut oil fatty acid phytosterol esters, sterol fatty acid esters such as cholesteryl stearate and oleic acid cholesterol esters, hydrocarbons such as liquid paraffin, petroleum jelly and squalane, beeswax Waxes such as molasses and carnauba wax, rice bran oil, olive oil, soybean oil, rice germ oil, jojoba oil, castor oil, safflower oil, sunflower oil, olive oil, macadamia nut oil and other fats and oils, dipropylene glycol, 1,3- Moisturizers such as butylene glycol, glycerin, propylene glycol, sorbitol, maltitol, diglycerin, anionic interfaces such as sodium cetyl sulfate, N-stearoyl-L-glutamate Nonionic interfaces such as oxidant, polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene polyhydric alcohol fatty acid ester, polyoxyethylene hydrogenated castor oil, polyhydric alcohol fatty acid ester, polyglycerin fatty acid ester, sucrose fatty acid ester Activators, cationic surfactants such as tetraalkylammonium salts, amphoteric surfactants such as betaine type, sulfobetaine type, sulfoamino acid type, etc., natural such as lecithin, hydrogenated lecithin, lysophosphatidylcholine, ceramide, cerebroside Surfactants, polyether-modified silicone, amino-modified silicone and other silicone surfactants, chamomile, assembly, aloe, peach, carrot, horsetail, mulberry, peach leaf, sage, loquat leaf, cucumber, kizuta, Hibiscus, Turmeric, Rosemary, Ogon, Clove, Fennel, Prune, Licorice and other plant extracts, vitamins such as vitamins A, B, C, E, antioxidants, antiseptics, anti-inflammatory agents, fragrances, etc. It is possible to mix | blend suitably the other component normally mix | blended with cosmetics.

  Next, although an Example demonstrates this invention concretely, it cannot be overemphasized that this invention is not limited only to a following example. The blending amounts are all mass% (hereinafter simply referred to as%). The test methods described in the examples are as follows.

<Stability test>
The sample was stored in a thermostatic bath at 0 ° C., 30 ° C., and 45 ° C., and the stability was evaluated according to the following criteria. The worst evaluation among the evaluations at each temperature was taken as the overall evaluation. In addition, the presence or absence of separation was determined visually, and the change in viscosity was defined as a change when there was an increase / decrease of ± 20% or more based on the initial viscosity as measured with a B-type viscometer.
(Evaluation)
A: Stable without separation or viscosity change was 6 months or more.
○: Stable without separation or viscosity change was 1 month or more and less than 6 months.
Δ: Stable without separation or viscosity change was 2 weeks or more and less than 1 month.
X: Stable without separation or viscosity change was less than 2 weeks.

<Usability evaluation test>
The samples were subjected to a sensory test by 20 female panelists, and each item of “Nobi”, “Skin familiarity”, and “No stickiness” was rated according to the following criteria, and the average score was determined.
(Evaluation points)
5 points: very good, 4 points: good, 3 points: normal, 2 points: slightly bad, 1 point: bad.
(Judgment)
A: Average point 4.5 points or more, ○: Average point 3.5 points or more and less than 4.5 points, Δ: Average point 2.5 points or more and less than 3.5 points, ×: Average point less than 2.5 points.

Examples 1-3, Comparative Examples 1-4
O / W type sunscreen cosmetics were prepared by the components shown in Table 1 and the following production method, and the stability test and the usability evaluation test were conducted. The results are also shown in Table 1.

<Manufacturing method>
(1) Ingredients 4 to 8 are uniformly mixed at room temperature with a high-speed mixer (TK Lobody Spar 2.5 type, manufactured by Primix) at a rotational speed of 2000 rpm. (2) Component 12 (purified water) is heated to 50 ° C., and components 9 to 11 are mixed and dissolved. (1) is added to (2), and components 1 to 3 are further added, and then uniformly mixed with the high-speed mixer at a rotational speed of 6000 rpm. Then cool to room temperature.

  As is apparent from Table 1, the O / W type sunscreen cosmetics of the examples according to the present invention are superior in stability and usability compared with the O / W type sunscreen cosmetics of the comparative examples. Met.

Example 4
An O / W type sunscreen emulsion comprising the following ingredients was prepared according to a conventional method. The O / W type sunscreen emulsion was excellent in stability and usability.
Ingredient name Compounding amount (%)
2-Ethylhexyl paramethoxycinnamate 7.5
4-tert-butyl-4′-methoxydibenzoylmethane 1.0
Isocetyl myristate 3.0
Silicone-treated zinc oxide 5.0
Silane-treated titanium oxide 3.0
Squalane 5.0
Decamethylcyclopentasiloxane 3.0
Dimethylpolysiloxane (100cs) 2.0
SIMULGEL EG (Note 1) 3.5
Ammonium glycyrrhizinate 0.3
Ethanol 15.0
Edetate disodium 0.01
Xanthan gum 0.1
Nicotinamide 0.01
Fragrance 0.2
Purified water balance

  Table 2 shows the composition of the fragrance used in Example 4.

Example 5
An O / W type sunscreen emulsion composed of the following ingredients was prepared in a conventional manner. The O / W type sunscreen emulsion was excellent in stability and usability.
Ingredient name Compounding amount (%)
2-Ethylhexyl paramethoxycinnamate 5.0
4-tert-Butyl-4′-methoxydibenzoylmethane 1.0
Spherical silicon powder (Note 5) 3.0
Isocetyl myristate 3.0
Silicone-treated zinc oxide 5.0
Silane-treated titanium oxide 3.0
Decamethylcyclopentasiloxane 2.0
Isododecane 3.0
Dimethylpolysiloxane (30000cs) 0.5
SIMULGEL EG (Note 1) 3.5
Ethanol 15.0
Edetate disodium 0.01
Acrylic acid / alkyl methacrylate copolymer 0.1
Xanthan gum 0.02
Dipotassium glycyrrhizinate 0.1
Polyoxyethylene (20) palm oil fatty acid sorbitan 0.5
Polyoxyethylene (60) hydrogenated castor oil 0.3
Purified water balance
(Note 5) Tospearl (trade name: manufactured by Momentive Performance Materials)

  It should be noted that, when the composition of any of the examples is used, the skin is not irritated and other symptoms that are considered to be a side effect do not appear, and the O / W type sunscreen cosmetic according to the present invention is excellent in safety. Was obvious.

  According to the present invention, it is possible to provide an O / W-type sunscreen cosmetic that is excellent in storage stability, has a good feeling of stickiness, has a good feeling of stickiness, and does not feel sticky.

Claims (2)

  O / W containing (A) (sodium acrylate / acryloyldimethyltaurine) copolymer, (B) zinc oxide and / or titanium oxide, (C) silicone oil, and (D) glycyrrhizic acid, glycyrrhetinic acid or salts thereof Type sunscreen cosmetics.   The O / W sunscreen cosmetic according to claim 1, further comprising (E) xanthan gum.