JPH0415762B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a water-in-oil emulsion cosmetic that is stable and has an excellent feeling of use. More specifically, the present invention relates to a water-in-oil emulsion cosmetic that is stable and has an excellent feel when used, even though it contains a large amount of silicone oil. [Conventional technology] Hydrocarbon-based oils such as liquid paraffin and squalane are conventionally known as oils used in water-in-oil emulsified cosmetics, and these oils cover the skin surface with an oil film to prevent water evaporation. Therefore, it is thought to be effective for treating rough skin. Facial cosmetics using these oils are released as products with high treatment effects,
In addition, makeup cosmetics have excellent water repellency,
It is sold on the market as a product that does not leave makeup smudged. On the other hand, water-in-oil emulsion cosmetics containing silicone oil as the oil component are smooth to use and have excellent water repellency. In particular, cosmetics containing volatile silicone spread easily when applied, and as they spread, the volatile silicone oil evaporates, reducing the amount of oil remaining on the skin surface, resulting in good adhesion. It is characterized by being able to produce products that are sweat resistant and do not easily remove makeup. [Problems to be solved by the invention] However, silicone oil has the disadvantage that it is very difficult to obtain a stable water-in-oil emulsion system, and it is difficult to obtain a stable water-in-oil emulsion system by blending a large amount of silicone oil and creating a stable water-in-oil emulsion system. Although water-in-oil type emulsified cosmetics having the same properties are strongly desired, they have not yet been obtained. Until now, methods for obtaining highly stable water-in-oil emulsified cosmetics made from silicone oil have been known, such as increasing and solidifying waxes or using silica. It had drawbacks such as being heavy and sticky. In view of these circumstances, the inventors of the present invention have made extensive studies and found that an oil phase containing 30% or more silicone oil can be stabilized by using an aqueous phase containing amino acids and/or amino acid salts and a specific surfactant. The present inventors have discovered that a water-in-oil emulsion cosmetic with an excellent feel during use can be obtained, and have completed the present invention. [Means for solving the problems] That is, the present invention provides (A) silicone oil in the oil phase component.
(B) an aqueous phase in which amino acids and/or amino acid salts are 0.1% or more of the water phase components; and (C) a lipophilic nonionic surfactant; (A):
This is a water-in-oil emulsion cosmetic in which (B) is present in a weight ratio of 1:1 to 1:5 and (C) is present in an amount of 2% by weight or more based on the total components. The configuration of the present invention will be explained in detail below. The silicone oil used in the present invention may be any conventionally used silicone oil, but specific examples include dimethylpolysiloxane, methylphenylpolysiloxane, decamethylcyclopentasiloxane, and octamethylcyclooctasiloxane. Volatile silicone oils such as methylcyclopentasiloxane and octamethylcyclooctasiloxane are preferred. The amount of silicone oil to be blended is related to the amount of other oil phase components, but it is preferably 30% or more of the oil phase components. In other words, if the blended amount of silicone oil is 30% or less of the oil phase components, the properties of the oil phase will be close to those of other blended oils, so a lipophilic nonionic surfactant suitable for the other blended oils should be used. can be used. However, when the amount of silicone oil blended exceeds 30% of other oil phase components, conventional lipophilic nonionic surfactants cannot create a stable emulsified state and separate, so the lipophilic surfactant of the present invention A nonionic surfactant is required to maintain a stable emulsified state. Next, the lipophilic nonionic surfactants used in the present invention include sorbitan sesquiisostearate, sorbitan diisostearate, sorbitan sesquiolate, sorbitandiolate, glyceryldiolate, glyceryl diisostearate and the following [1] , [2], a surfactant having the structural formula of [3]. {In the general formulas [1], [2], [3], R is a methyl group or a partially phenyl group, R' is hydrogen or an alkyl group having 1 to 12 carbon atoms, p is a number of 1 to 5, q is 2
The numbers x, m, and n are average numbers, and the polyoxyalkylene-modified organopolysiloxane contains 5 to 40% by weight of polyoxyalkylene groups in the molecule, and the molecular weight of the polyoxyalkylene-modified organopolysiloxane is Represents a numerical value greater than or equal to 1000. }, and these surfactants emulsify the oil phase component containing 30% or more silicone oil to create a stable water-in-oil emulsion system. In addition, sorbitan sesquiisostearate,
Sorbitan diisostearate, sorbitan sesquiolate, sorbitan diolate, glyceryl dioleate, glyceryl diisostearate and the active agents having the general formulas [1][2][3] have a weight percent of polyoxyalkylene groups. 5-40% by weight
and those with a molecular weight of 1000 or more, amino acids and/or
Alternatively, the stability can be dramatically improved by combining amino acid salts. Furthermore, the amino acids used in the present invention may be commonly known amino acids, such as glycine, alanine, valine, leucine, isoleucine, serine,
Examples include monoaminomonocarboxylic acids such as threonine and phenylalanine, monoaminodicarboxylic acids such as aspartic acid and glutamic acid, diaminomonocarboxylic acids such as arginine and lysine, and/or salts thereof. These amino acids and/or amino acid salts may be used, especially sodium or potassium salts of acidic amino acids such as aspartic acid, glutamic acid, etc., which can be emulsified with the lipophilic nonionic surfactants of the present invention to form stable water-in-oil surfactants. Create emulsified cosmetics. The concentration of the amino acid and/or amino acid salt used in the present invention is 0.1% or more in the aqueous phase component, but if the concentration is 0.1% or less, the effect will not be apparent, and if a large amount is added, precipitation will occur, which is not preferable. Therefore, the concentration of the amino acid and/or amino acid salt used in the present invention is preferably 0.1% to 20%. In addition, the present invention provides that (A) silicone oil is 30% of the oil phase component.
% or more of the oil phase, (B) the aqueous phase where the amino acids and/or amino acid salts are 0.1% or more of the water phase components, and (C) the lipophilic nonionic surfactant in (A). Amount of silicone oil and amount of amino acids in (B) and (C)
Stability and feel can be adjusted by adjusting the amount of lipophilic active agent in the mixture, but in order to achieve good stability, a non-sticky feel, a crisp feel, and good spreadability, it is necessary to use an aqueous phase. It is necessary to mix a large amount of ingredients, preferably (A):(B) in a weight ratio of 1:1.
The weight ratio of (A) to (B) is preferably 1:2 to 1:4. As described above, one of the characteristics of the water-in-oil emulsified cosmetic of the present invention is that it can contain a large amount of water phase components, which makes it easier to produce a refreshing feel when using it, compared to conventional water-in-oil emulsified cosmetics. Its feel is revolutionary compared to cosmetics. In addition to the above-mentioned essential ingredients, the emulsified cosmetic composition of the present invention may contain, if necessary, components that are included in ordinary cosmetic compositions. For example, propylene glycol, dipropylene glycol, 1-
Moisturizing agents such as 3-butylene glycol, glycerin, maltitol, sorbitol, polyethylene glycol, sodium hyaluronate, pyrrolidone carboxylates, and oil phase components such as petrolatum, lanolin, ceresin, microcrystalline wax, carnauba wax, candelilla wax, higher fatty acids, Solid or semi-solid oils such as higher alcohols,
Liquid oils such as squalane, liquid paraffin, ester oils, triglycerides, etc., coloring materials such as inorganic pigments and organic pigments, and surfactants such as cationic active agents, anionic active agents, and nonionic active agents as required. , vitamin E, vitamin E acetate, etc., astringents, antioxidants, preservatives, fragrances, and PH regulators such as citric acid, sodium citrate, lactic acid, sodium lactate, dibasic sodium phosphate, or organically modified montmorillonite, etc. Thickeners, ultraviolet absorbers, and the like can be appropriately blended into the water-in-oil emulsion cosmetic of the present invention. [Example] Next, the present invention will be explained in detail with reference to an example. The present invention is not limited thereby.
The blending amounts in the examples are weight %. Prior to the examples, evaluation methods adopted in each example will be explained. (Stability) A water-in-oil emulsion cosmetic prepared by a specified method is
℃, room temperature, and in a constant temperature bath at 37℃, and the stability after a certain period of time was evaluated according to the following evaluation criteria. Separation No aggregation 〇 〃 Slightly △ 〃 Yes × (Usability) Using 20 female panels, usability such as spreadability, crispness, stickiness, and firmness was evaluated according to the following evaluation criteria. 15 or more people answered that it was good 〇 〃 7 to 14 people △ 〃 6 or less people × Example 1 Hand cream Decamethylcyclopentasiloxane 10.0 Dimethylpolysiloxane (6cs) 5.0 Liquid paraffin (120cs) 5.0 Modified with polyoxyalkylene Organopolysiloxane [General formula 1] (Polyoxyalkylene weight 20% Average molecular weight 6200) 5.0 Fragrance 0.2 Ion-exchanged water 65.6 Sodium L-glutamate 4.0 1,3-butylene glycol 5.0 Preservative 0.2 (Production method) The oil phase of Heat it to. To this is added preheated to 70°C, and after emulsification and dispersion, the mixture is stirred and cooled to room temperature to obtain the desired hand cream. The manufacturing methods of Examples and Comparative Examples below are based on the method of Example 1. (Results) As shown in Table 1, the hand cream of this example showed good results in both stability and usability. Example 2 Hand cream Octamethylcyclotetrasiloxane 5.0 Decamethylcyclopentasiloxane 5.0 Dimethylpolysiloxane (6cs) 5.0 Liquid paraffin (70cs) 5.0 Sorbitan diisostearate 8.0 Fragrance 0.2 Ion exchange water 62.5 L-serine 1.0 L-asparagine Sodium acid 3.0 Propylene glycol 5.0 Preservative 0.3 (Results) As shown in Table 1, the hand cream of this example showed good results in both stability and usability. Comparative example 1 Decamethylcyclopentasiloxane 10.0 Dimethylpolysiloxane (6cs) 5.0 Liquid paraffin (70cs) 5.0 Polyoxyalkylene modified organopolysiloxane [General formula 1] Polyoxyalkylene weight 20% average molecular weight
6200) 5.0 Fragrance 0.2 Ion-exchanged water 65.6 1,3-butylene glycol 5.0 Preservative 0.2 (Results) Table 1 shows the evaluation results of stability and usability. Comparative example 2 Decamethylcyclopentasiloxane 10.0 Dimethylpolysiloxane (6cs) 5.0 Liquid paraffin (70cs) 5.0 Glyceryl monooleate 5.0 Fragrance 0.2 Ion exchange water 65.6 Sodium L-glutamate 4.0 1,3-butylene glycol 5.0 Preservative 0.2 (Results) Table 1 shows the evaluation results of stability and usability. Comparative example 3 Liquid paraffin (70cs) 25.0 Diglycerin diisostearate 6.0 Fragrance 0.2 Ion exchange water 59.6 Sodium L-glutamate 4.0 1,3-butylene glycol 5.0 Preservative 0.2 (Results) The evaluation results of stability and usability are shown. Shown in 1.

[Table] Examples 3 to 6 The formulations shown in Table 2 were prepared and evaluated for stability and usability. The evaluation results are shown in Table 2. Comparative Examples 4 and 5 The formulations shown in Table 2 were prepared and evaluated for stability and usability. The evaluation results are shown in Table 2. Examples 7 to 10 The formulations shown in Table 3 were prepared and evaluated for stability and usability. The evaluation results are shown in Table 3. Comparative Example 6 The formulations shown in Table 3 were prepared and evaluated for stability and usability. The evaluation results are shown in Table 3.

【table】

【table】

[Table] Example 11 Emulsion octamethylcyclotetrasiloxane 10.0 Dimethylborisiloxane (6cs) 10.0 Cetyl isooctanate 2.0 Liquid paraffin (120cs) 2.0 Sorbitan diisostearate 3.0 Polyoxyalkylene modified organopolysiloxane [General formula 3] Polyoxyalkylene group 17% by weight average molecular weight
6000） 3.0 Antioxidant Appropriate amount Fragrance 〃 Ion exchange water 63.7 L-serine 1.0 Sodium L-aspartate 2.0 Glycerin 3.0 Sodium hyaluronate 0.1 Preservative 0.2 Example 12 Hair cream octamethylcyclotetrasiloxane 10.0 Phenylpolysiloxane 5.0 Squalane 4.0 Silicon wax 1.0 Glyceryldiolate 2.0 Polyoxyalkylene-modified organopolysiloxane [General formula 2] (Polyoxyalkylene group 15% by weight average molecular weight
9000) 4.0 Antioxidant 0.05 Vitamin E acetate 0.1 Ion exchange water 67.05 Glycine 2.0 Leucine 1.0 Tyrosine 0.5 Propylene glycol 3.0 Preservative 0.3 Example 13 Suntan lotion dimethylpolysiloxane (6cs) 5.0 Decamethylcyclopenatasiloxane 3.0 Olive oil 5. 0 flow Paraffin (70cs) 5.0 4-tert-butyl-4'-methoxy-dibenzoylmethane 0.3 Dimethyloctyl PAPA 1.0 Polyoxyalkylene-modified organopolysiloxane [General formula 1] (Polyoxyalkylene group 20% by weight average molecular weight
2000) 6.0 Particulate titanium oxide 1.0 Antioxidant 0.05 Fragrance 0.3 Ion exchange water 61.05 Dipropylene glycol 5.0 Sodium L-glutamate 5.0 Sodium pyrrolidone carboxylate 2.0 Preservative 0.3 Example 14 Pine surge cream decamethylcyclopenatasiloxane 5.0 Dimethylpolysiloxane (6cs) 5.0 Liquid paraffin (70cs) 10.0 Squalane 5.0 Sorbitan diisostearate 4.0 Polyoxyalkylene-modified organopolysiloxane [General formula 1] (Polyoxyalkylene group 15% by weight average molecular weight
3000) 3.0 Vitamin E acetate 0.1 Antioxidant 0.05 Flavor 0.3 Ion exchange water 58.35 Sodium L-aspartate 2.0 Glycine 2.0 Glycerin 2.0 1,3-butylene glycol 3.0 Preservative 0.2 [Effects of the invention] The present invention has the above-mentioned effects. With the same structure, a water-in-oil emulsion cosmetic with excellent stability and a refreshing feel can be obtained.

Claims (1)

[Scope of Claims] 1. (A) an oil phase in which silicone oil accounts for 30% by weight or more (hereinafter simply referred to as %) of the oil phase component, and (B) an amino acid and/or an amino acid salt of 0.1% by weight in the aqueous phase component. %
It consists of the above aqueous phase and (C) a lipophilic nonionic surfactant, in which the weight ratio of (A):(B) is 1:1 to 1:5, and (C) is 2 of the total components. % or more of water-in-oil emulsion cosmetics. 2. The water-in-oil emulsion cosmetic according to claim 1, wherein the silicone oil is dimethylpolysiloxane, methylphenylpolysiloxane, decamethylcyclopentasiloxane, or octamethylcyclooctasiloxane. 3 The lipophilic nonionic surfactant is sorbitan sesquiisostearate, sorbitan diisostearate, sorbitan sesquiolate, sorbitan oleate, glyceryldiolate, glyceryl diisostearate, or the following general formula [1], [2],
The water-in-oil emulsion cosmetic according to claim 1, which is a polyoxyalkylene-modified organopolysiloxane represented by [3]. {In the general formulas [1], [2], [3], R is a methyl group or a partially phenyl group, R' is hydrogen or an alkyl group having 1 to 12 carbon atoms, p is a number of 1 to 5, q is 2
The numbers x, m, and n are average numbers, and the polyoxyalkylene-modified organopolysiloxane contains 5 to 40% by weight of polyoxyalkylene groups in the molecule, and the molecular weight of the polyoxyalkylene-modified organopolysiloxane is Represents a numerical value greater than or equal to 1000. } 4. The water-in-oil emulsion cosmetic according to claim 1, wherein the amino acid is aspartic acid or glutamic acid. 5. The water-in-oil emulsion cosmetic according to claim 1, wherein the amino acid salt is a sodium or potassium salt of aspartic acid or a sodium or potassium salt of glutamic acid.