JP2006241032A - Emulsified skin lotion - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a skin lotion rich in silicone oil and excellent in feeling. <P>SOLUTION: The invention relates to the transparent to translucent emulsified skin lotion comprising (A) 5-20% of an oil phase comprising silicone oil and a higher alcohol with 14-22 carbon atoms and satisfying following requirements, (B) at least one selected from lecithin, fatty acid ester of polyglycerin or fatty acid ester of sugar, (C) a polyhydric alcohol, (D) water, wherein the weight ratio of (A)/(B) is 3-12, and the emulsion is obtained by a high pressure emulsification. In the proviso that the oil phase comprises ≥80% of the silicone oil and ≥3% of the higher alcohol with 14-22 carbon atoms. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an emulsified lotion having a refreshing feel, excellent moisture retention and excellent stability.

In recent years, eating habits have changed in Japan, and sensual demands for cosmetics are also changing. As a recent trend, a refreshing sensation is preferred, and a lotion that is lighter than a cream or emulsion is preferred. However, it is difficult to maintain necessary skin protection and moisturizing properties with a lotion composed only of a water-soluble substance. For this reason, attempts have been made to blend silicone oil with a strong refreshing feeling and a high skin protection property in aqueous cosmetics. (Patent Documents 1 to 3)
However, in the aqueous cosmetic disclosed in Patent Document 1, ½ amount (weight ratio) of non-hydrogenated lecithin with respect to silicone oil must be blended. A considerable amount of hydrogenated lecithin must be blended, and good sensory properties cannot be obtained.
Further, even the emulsified cosmetic disclosed in Patent Document 2 cannot maintain stability unless a considerable amount of phospholipid is added to the silicone oil (oil phase).
In the emulsified cosmetic disclosed in Patent Document 3, the refreshing sensation of silicone oil is not fully utilized.
Japanese Patent Application Laid-Open No. 07-173715 JP 2002-284737 A Japanese Patent Laid-Open No. 04-284737

  The present inventors have obtained a highly stable skin lotion that has a very refreshing sensation with a low viscosity while having a necessary skin protection and moisturizing property as a cosmetic material, including an oily phase. There are challenges.

As a result of intensive studies by the present inventors, it has been found that the following preparations can solve this problem.
(A) 5-20% of an oil phase containing a silicone oil and a higher alcohol having 14 to 22 carbon atoms and satisfying the following conditions
The ratio of silicone oil in the oil phase is 80% or more. The ratio of higher alcohols having 14 to 22 carbon atoms in the oil phase is 3% or more. (B) One of lecithin, polyglycerin fatty acid ester, and sucrose fatty acid ester Seed or more (C) polyhydric alcohol (D) water phase, transparent to translucent emulsified lotion wherein (A) is 3-12 times (weight ratio) to (B)

First, the component (A) will be described.
As the silicone oil used in the present invention, those having a viscosity of about 100 cs or less are particularly preferable. When the viscosity of the silicone oil is increased, when it is blended in a large amount in the composition for external use, an oily feel is produced, which is not preferable in terms of use. Examples of the low-viscosity silicone oil include low-polymerization chain dimethylpolysiloxane, and one or more of these can be selected and used as necessary.
Higher alcohols can be used regardless of whether they are linear, branched, saturated, or unsaturated having 14 to 22 carbon atoms, but mainly used are linear and saturated higher alcohols having 16 to 18 carbon atoms.
The proportion of the above-mentioned silicone oil and higher alcohol in the oil phase is 80% or more for silicone oil, 3% or more for higher alcohol, more preferably 90% or more for silicone oil, and 5 to 10% for higher alcohol. In addition, there is no problem in blending the oily raw material to the extent that it does not contradict the gist of the present invention. Such an oil phase is blended in an amount of 5 to 20%.

Next, as the component (B), lecithin includes not only lecithin extracted from egg yolk and plants, but also lecithin or a hydrogenated product obtained by further purifying these and lysolecithin.
Polyglycerol fatty acid ester is an ester of polyglycerol having a polymerization degree of glycerin of 5 to 15 and linear, branched, saturated or unsaturated fatty acid having 16 to 22 carbon atoms and having an average esterification degree of 2 or less. Often used.
As the sucrose fatty acid ester, a linear, branched, saturated or unsaturated fatty acid ester having 16 to 22 carbon atoms and sucrose having an average degree of esterification of 1.5 or less is most often used.
These are used alone or in combination of two or more. However, if the amount of component (B) is large, it is restricted in terms of functionality, so that the amount of (A) is 3 to 12 times (weight ratio) relative to (B).
In addition, although it does not deny that other surfactants are blended, in the experiments of the present inventors, three types of lecithin, polyglycerin fatty acid ester, and sucrose fatty acid ester most closely match the gist of the present invention. Therefore, it may be meaningful to use these three types basically and use some other activator for adjustment of application, sensory and the like.

Next, (C) component, for example, ethylene oxide, ethylene glycol, diethylene glycol, triethylene glycol, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, polyethylene glycol, oxidation Propylene, propylene glycol, polypropylene glycol, 1,3 butylene glycol, pentyl glycol, glycerin, diglycerin, erythritol, pentaerythritol, dipentaerythritol, threitol, arabitol, xylitol, ribitol, galactitol, sorbitol, mannitol, lactitol, multi Toll, Sicilitol, Laminitol, Varienamine, Bali Min, Baridatoru and the like. Among these, glycerin and 1,3 butylene glycol are the best, and it is particularly preferable to blend glycerin with 5% or more of the preparation.

To this, water of component (D) is blended. Of course, there is no particular limitation on water, and there is no problem if it can be used for cosmetics.
Furthermore, other necessary components are blended. For example, pigmentation inhibitor, tyrosinase activity inhibitor, melanocyte melanin production inhibitor, melanin production accelerator, moisturizer, cell activator / metabolic activator, antioxidant, active oxygen scavenger / radical production inhibitor, fat metabolism Accelerator, UV protection agent / UV absorption promoter, astringent, anti-inflammatory agent / interleukin production inhibitor / anti-inflammatory agent, antiseborrheic agent, antibacterial agent / antiviral agent, blood flow promoter / vascular stimulant, anti Androgenic agents, structural proteolytic enzymes (elastase, collagenase, keratin protease, serine protease, integrin degrading enzyme, involucrin degrading enzyme, laminin degrading enzyme, fibronectin degrading enzyme, proteoglycan degrading enzyme) activity inhibitor, structural protein synthesis Accelerator, mucopolysaccharide (hyaluronic acid, chondroitin Acid etc.) Degrading enzyme inhibitors, mucopolysaccharide synthesis promoters, intercellular adipogenesis promoters / intercellular lipid state improvers, keratolytic agents / stratum exfoliation promoters, plasminogen activator antagonist inhibitors, Maillard reaction Inhibitor, testosterone 5α reductase activity inhibitor / hair papilla activator / hair growth promoter, hair matrix cell growth inhibitor / hair growth inhibitor, hair swelling agent / hair protectant, odorant elimination agent, pigment / coloring Extracts, metabolites, and other ingredients derived from plant-based materials, animal-based materials, microbial-based materials, and other natural product materials that are preferred for use in forming forms of active ingredients and cosmetic compositions such as fragrances and fragrances Or various compounds.

In order to reduce the amount of the surfactant used, high-pressure emulsification is necessary. The equipment that achieves high-pressure emulsification includes Manton-Gorin type, Microfluidizer (trade name, manufactured by Microfluidic), Ultimateizer (trade name, manufactured by Tau Technology), Nanomizer (trade name, manufactured by Nanomizer), etc. Is mentioned. When these are used for emulsification, a result that sufficiently exhibits the object of the present invention can be obtained.
In addition, as a product, it exhibits a liquid with a low viscosity of transparent to translucent. The transparency is 20 to 99% in terms of transmittance when measured in a 1 cm cell at 750 nm.

  Several examples are described in Table 1 below, but the present invention is not limited to these examples. (Values are shown in parts by weight.)

Note 1) Product name: Silicon SH200-50, manufactured by Toray Dow Corning Silicon
Note 2) Product name Silicon SH200-10 manufactured by Toray Dow Corning Silicon Co., Ltd.
Note 3) Product name Calcoal 6098, manufactured by Kao Corporation
Note 4) Product name Calcoal 8098, manufactured by Kao Corporation
Note 5) Riken Vitamin Co., Ltd., trade name Riken Oil E700
Note 6) Product name Coatsome NC-61
Note 7) Product name DK-Ester S-110, manufactured by Daiichi Kogyo Seiyaku
Note 8) Product name Nikkor Decagrin 1-S manufactured by Nikko Chemicals
Note 9) Product name PEG400, manufactured by NOF Corporation

  The production methods of the above examples were as follows: (B) 15% of (C) and purified water, and (A) were weighed separately and then heated to 80 ° C. (B) (A) was gradually added to 15% of (C) and purified water while stirring with a disper. This was treated three times at 18000 psi with a microfluidizer (M-110EH manufactured by Microfluidic Corporation). The remaining (D) was added while stirring this with a disper.

  These examples were slightly cloudy and transparent, had no problem with stability, and the result of actual use was a refreshing skin lotion.

Claims (2)

(A) 5-20% of oil phase containing silicon oil and higher alcohol having 14 to 22 carbon atoms and satisfying the following conditions
-Ratio of silicon oil in oil phase is 80% or more-Ratio of higher alcohol having 14 to 22 carbon atoms in oil phase is 3% or more (B) 1 of any of lecithin, polyglycerin fatty acid ester, sucrose fatty acid ester Seed or more (C) polyhydric alcohol (D) aqueous phase, (A) is 3 to 12 times (weight ratio) with respect to (B), and is transparent to translucent Emulsifying lotion   The emulsified lotion according to claim 1, wherein the polyhydric alcohol is at least one of glycerin and 1,3-butylene glycol.