JP2007161635A - Two layer separating type cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a two layer separating type cosmetic hardly causing irritation, excellent in touch and use feeling and obtaining high skin beautifying effect (including bleaching effect and aging resistant effect). <P>SOLUTION: The two layer separating type cosmetic comprises ascorbic acid and/or a polyhydric alcohol compounded with a salt of the acid and an oily agent, is coated on the skin after shaking/mixing in application, and returns to original two layers quickly after application. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a two-layer separated cosmetic. Specifically, it is separated into two layers (liquid layer / liquid layer) when left standing, but when used, it is shaken / mixed to temporarily emulsify and then applied to the skin in that state. Regarding fees. More specifically, the present invention relates to a two-layer separated cosmetic that improves stability, enhances the feel, and improves the skin condition with respect to an alcohol preparation containing ascorbic acid and / or a salt thereof.

  Conventionally, since ascorbic acid and / or its salt is unstable in an aqueous solution, a technique for dispersing or dissolving it in a polyhydric alcohol when used for the purpose of whitening or the like has been developed. However, such a preparation has a problem that it has a stimulus such as a thermal sensation at the time of application and is also sticky to the touch.

The present inventor intends to overcome the problems of the polyhydric alcohol preparation containing ascorbic acid and / or a salt thereof, and the idea that it can be solved by adding an oil to the alcohol preparation. Got. When an oil agent such as fats and oils is blended with an alcohol preparation, it separates into two layers upon standing. Then, this inventor investigated patent gazette regarding the two-layer separated type cosmetics. As a result, it has been found that many patents have been filed for inventions relating to two-layer separated cosmetics, but no invention for two-layer separated cosmetics for stabilizing ascorbic acid and / or a salt thereof has been found. . Therefore, the present inventor has continued further research and has completed the present invention through various trial manufactures and tests.
JP 11-335237 A JP 2001-213720 A JP 2002-255739 A JP 2003-137728 A JP 2004-196713 A

  That is, Patent Document 1 includes one or more selected from polyoxyalkylene adducts of polyhydric alcohols or polymers thereof and / or polyoxyethylene-polyoxypropylene copolymers, and cationized polymers. One type or two or more types are formulated, and a two-layer separation type cosmetic that has excellent usability and good separation / restoration after use is disclosed. Patent Document 2 discloses a two-layer cosmetic containing a phospholipid and a water-soluble polymer and having a good feeling of use and re-separability. However, Patent Document 1 and Patent Document 2 do not disclose any improvement method for cosmetics using a polyhydric alcohol preparation containing ascorbic acid and / or a salt thereof.

  Patent Document 3 contains one or more of polyoxyethylene sorbitanate ester and sorbitan fatty acid ester, sodium citrate, carrageenan and xanthan gum, and has excellent usability and separation after use. A two-layer separation type hair dye having a good restorability is disclosed. Patent Document 4 includes a two-layer separation type cosmetic comprising one or more selected from saccharides or derivatives thereof or salts thereof that are not cationic and having good separation and restoration properties after use. Is disclosed. Patent Document 5 discloses a two-layer separation type cosmetic comprising an N-long chain acyl basic amino acid derivative and an acid addition salt thereof, an oil agent and water, and having good separation and recovery after use. Yes. However, Patent Documents 3 to 5 do not disclose any improvement methods for cosmetics using a polyhydric alcohol preparation containing ascorbic acid and / or a salt thereof.

  In view of the above situation, the present invention provides a two-layer separated cosmetic that is less irritating, has a good touch and a feeling of use, and provides a higher skin beautifying effect (including a whitening effect and an anti-aging effect). Let it be an issue.

  As a result of intensive studies to solve the above-mentioned problems, the present inventor can solve the above-mentioned problems by dispersing and dissolving ascorbic acid and / or a salt thereof in a polyhydric alcohol and adding an oil agent thereto. As a result, the present invention has been completed.

  That is, among the present invention for solving the above-mentioned problems, the invention described in claims and claim 1 includes (A) a polyhydric alcohol containing ascorbic acid and / or a salt thereof, and (B) an oil agent. Is a two-layer separated cosmetic.

  In the invention described in claim 2, the compounding amount of the component (A) is 10 to 90% by weight based on the total amount of the cosmetic, and the compounding amount of the component (B) is 10 to 10% based on the total amount of the cosmetic. The two-layer separated cosmetic according to claim 1, wherein the cosmetic is 90% by weight and the total amount of components (A) and (B) is 100% by weight.

  Furthermore, in the invention described in claim 3, the ascorbic acid and / or salt thereof is contained in an amount of 0.1 to 20% by weight based on the weight of the component (A). It is a separate cosmetic.

  Since the cosmetic according to the present invention has the above-described configuration, the state separated into two layers is maintained at the time of standing, and the oil agent layer covers and protects the surface of the polyhydric alcohol layer containing ascorbic acid and / or a salt thereof. Therefore, alteration of ascorbic acid and / or a salt thereof can be prevented. Further, when shaken at the time of use, the polyhydric alcohol layer and the oil agent layer are mixed, and the irritation and stickiness due to the use of the polyhydric alcohol are alleviated. In addition, the emulsified state is temporarily exhibited by shaking, the viscosity is increased and no sagging occurs, and the feeling of use is further improved because it becomes extremely easy to use.

  According to the present invention, it is possible to provide an ascorbic acid-containing cosmetic that has excellent moist feeling, no stickiness, and no irritation or discomfort to the skin, and has an excellent feeling of use. In addition, according to the present invention, it is possible to provide a separation-type cosmetic that has excellent dispersibility during shaking and can be re-separated into two clean layers after use.

  As described above, the present invention comprises a polyhydric alcohol layer and an oil agent layer containing ascorbic acid and / or a salt thereof, improves the storage stability of ascorbic acid and / or a salt thereof, and is shaken during use. This is a two-layer separation type cosmetic in which a monohydric alcohol layer and an oil agent layer are mixed, temporarily emulsified and applied to the skin, and immediately return to the original two-layer state after use. In addition, ascorbic acid used by this invention does not have a restriction | limiting in particular, such as a natural product, a fermented product, and a synthetic product. Moreover, the salt of ascorbic acid used in the present invention is not particularly limited, but one or more selected from sodium salts, potassium salts, basic amino acid salts, triethanolamine salts, etc. may be used. .

  The polyhydric alcohol used in the present invention is not particularly limited. For example, ethylene glycol, polyethylene glycol, propylene glycol, 1,3-butylene glycol, dipropylene glycol, glycerin, diglycerin, polyglycerin, glucose, maltose, and maltose. One or more selected from xylitol, sorbitol, erythritol, 3-methyl-1,3-butanediol and the like may be used.

Examples of the oil used in the present invention include fats and oils, hydrocarbon oils, esters, glyceride oils, silicone oils, and the like, and there are no particular limitations on them.
As fats and oils, for example, macadamia nut oil, evening primrose oil, sunflower oil, sesame oil, corn oil, olive oil, sesame oil, wheat germ oil, grape seed oil, avocado oil, safflower oil, sweet almond oil, hazelnut oil, egg yolk oil, Examples thereof include cholesteryl hydroxystearate and macadamia nut oil fatty acid cholesteryl.

Examples of the hydrocarbon oil include liquid paraffin, olive squalane, rice squalane, squalane and pristane.
Examples of the esters include isononyl isononanoate, isotridecyl isononanoate, isocetyl octanoate, isostearyl myristate, neobendyl glycol dioctanoate, neobendyl glycol dicaprate, isostearic isostearate, isopropyl isostearate, isostearic acid Examples thereof include octyl dodecyl acid and octyl isopalimate.

Furthermore, examples of the glyceride oils include triisostearic acid glyceride, tri-2-ethylhexanoic acid glyceride, monostearic acid glyceride, di-2-heptylundecanoic acid glyceride, and tri (capryl / capric acid) glyceride. Can do.
Examples of silicone oils include chain oils such as dimethylpolysiloxane and methylphenylpolysiloxane, and cyclic oils such as octamethylcyclotetrasiloxane and decamethylcyclopentanesiloxane.
These oil agents can use 1 type (s) or 2 or more types as needed.

  In the cosmetic according to the present invention, in addition to the above-mentioned raw materials, various raw materials and components generally applied to cosmetics can be appropriately blended within a range not impairing the effects of the present invention. Examples of such raw materials / components include surfactants, fragrances, preservatives, bactericides, antioxidants, chelating agents, drugs, plant extracts, and the like. Preferred examples of the drug include vitamin A or a derivative thereof, vitamin B group, vitamin E or a derivative thereof, ubiquinone (CoQ10), α-lipoic acid, and an oil-soluble vitamin C derivative.

  The method for producing a cosmetic according to the present invention is not different from a method for producing a normal two-layer separated cosmetic. That is, a polyhydric alcohol (component (A)) in which an appropriate amount of ascorbic acid and / or a salt thereof is dispersed may be filled in a container, and an appropriate amount of oil (component (B)) may be filled thereon. The blending ratio of component (A) (polyhydric alcohol layer) and component (B) (oil agent layer) is arbitrary in the range of 10 to 90 to 90 to 10 by weight ratio. Moreover, it is preferable to mix | blend ascorbic acid and / or its salt so that it may become 0.1 to 20 weight% with respect to a component (A).

  The cosmetic according to the present invention may be blended with ethyl alcohol for the purpose of further improving the feeling of use. By blending ethyl alcohol, the refreshing feeling and the astringent feeling during use can be further enhanced.

  Hereinafter, the present invention will be described in more detail with reference to test examples and examples. The present invention is not limited by the following test examples and examples. In addition, in all the explanations of the present invention including the following test examples, all blending ratios are% by weight.

<< Test Example 1 >>
(1) Test method and results According to the formulation shown in Table 2, the component (A) and the component (B) are prepared by a conventional method, filled in the same container, and the two-layer separated cosmetics of Examples 1 to 5 The cosmetic of Comparative Example 1 was made. These six kinds of cosmetics are used by 20 skilled panelists, respectively. (A) Component (A) (polyhydric alcohol layer) and component (B) (oil agent layer) separated into two layers Dispersibility and ease of use when lightly shaken by hand, (b) Feeling of use (feel of stickiness and touch / existence of irritation and discomfort), and (c) Separation speed and two-layer separation when standing still As a result, the opinions were tabulated and the evaluations shown in Table 3 were obtained. The evaluation criteria are shown in Table 1.
(2) Used raw material A. Component (A) = polyhydric alcohol layer Ascorbic acid sodium, ascorbic acid, 1,3-butylene glycol, glycerin B.I. Ingredient (B) = Oil layer Olive oil, vegetable squalane, isocetyl myristate, glyceryl triisostearate, vitamin A palmitate, polyoxyethylene glyceryl isostearate

(3) Findings on the test results As shown in Table 3, when only the polyhydric alcohol layer is used as in Comparative Example 1 from Test Example 1, irritation and discomfort to the skin are strongly felt during use. It can be understood that when the oil agent layer is blended with the polyhydric alcohol layer as in 1 to 5, the feeling of use is greatly improved and improved. In addition, when the ascorbic acid and / or salt thereof is contained in an amount of 0.1 to 20% by weight based on the weight of the component (A), the dispersibility during shaking and the two-layer separability after standing are extremely good. In addition, it can be understood that a cosmetic material with a very good feeling of use can be obtained.

<< Test Example 2 >>
(1) Test method and result According to the formulation shown in Table 4, component (A) and component (B) are prepared by a conventional method, filled in the same container, and separated into seven types of two layers of Examples 6-12. Made mold cosmetics. Dispersibility when the seven types of two-layer separated cosmetics are used by 20 skilled panelists, respectively, and (a) the polyhydric alcohol layer and oil agent layer separated into two layers are lightly shaken. Table 5: Ease of use, (b) Feeling of use (feel of stickiness and feel / existence of irritation and discomfort), and (c) Separation speed and two-layer separability when left standing Evaluation shown in was obtained. The evaluation criteria used were those in Table 1.
(2) Used raw material A. Component (A) = Polyhydric alcohol layer Sodium ascorbate, ascorbic acid, dipropylene glycol, glycerin B.I. Ingredient (B) = oil agent layer squalane, liquid paraffin, glyceryl tri-2-ethylhexanoate, polyoxyethylene sorbitan trioleate, vitamin E acetate

(3) Observations on test results As shown in Table 5, when ascorbic acid and / or a salt thereof is contained in an amount of 0.1 to 20% by weight based on the weight of component (A), shaking is performed. It can be understood that a cosmetic with excellent dispersibility in time and two-layer separation after standing and excellent use feeling can be obtained.

As explained in detail above, the cosmetics according to the present invention have excellent preservation properties of ascorbic acid and / or its salt, moist feeling, no stickiness, and no irritation or discomfort to the skin. It is a cosmetic that has an excellent feeling of use. In addition, the cosmetic according to the present invention is easy to use because it has excellent temporary emulsifying properties when shaken, and the two-layer separated cosmetic after use is clean and has a high commercial value. It is.

Claims (3)

  (A) A two-layer separation type cosmetic comprising a polyhydric alcohol containing ascorbic acid and / or a salt thereof and (B) an oil.   The blending amount of the component (A) is 10 to 90% by weight with respect to the total amount of the cosmetic, the blending amount of the component (B) is 10 to 90% by weight with respect to the total amount of the cosmetic, and the component (A) ( The two-layer separated cosmetic according to claim 1, wherein the total amount of B) is 100% by weight. The two-layer separated cosmetic according to claim 1 or 2, wherein ascorbic acid and / or a salt thereof is contained in an amount of 0.1 to 20% by weight based on the weight of component (A).