JP2009126791A - Oil-in-poly emulsion emulsified cosmetics - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil-in-oil emulsified cosmetic in a polyhydric alcohol which has little irritation, improves usability, enhances touch, has a good feeling of use, and has good storage stability.
A polyhydric alcohol-in-oil emulsified cosmetic comprising a polyhydric alcohol, an oil agent, a nonionic surfactant, and an oligoester obtained from the following components (a) to (c).
(A) C8-C30 fatty acid or hydroxy fatty acid (either linear or branched, and saturated or unsaturated)
(B) Linear or branched dibasic acid having 12 to 36 carbon atoms (c) Glycerin or glycerin condensate [Selection] None

Description

  The present invention relates to an oil-in-polyhydric emulsion emulsified cosmetic. More specifically, the present invention relates to an oil-in-oil emulsified cosmetic in a polyhydric alcohol that is less irritating, improves usability, enhances feel, and has good storage stability.

  Conventionally, cosmetics such as oils, creams and emulsions have been developed for the purpose of moisturizing and protecting skin and hair. Examples of such cosmetics include ointment cosmetics mainly composed of oil, and emulsified cosmetics obtained by emulsifying oil and water. In recent years, research on emulsification has progressed, many surfactants have been developed, and emulsification techniques have been improved. However, in order to obtain a stable emulsion, a large amount of surfactant is generally required. Therefore, when this is applied as a cosmetic, there are problems such as a feeling of use and a decrease in safety.

  There is a non-aqueous emulsification method as a method for obtaining a stable emulsion while reducing the amount of the surfactant used. In this method, a hydrophilic nonionic surfactant is added to a water-soluble solvent, an oil phase is added thereto to prepare an oil-type emulsifier in the water-soluble solvent, and then water is added to make the emulsion stable. An oil-in-water emulsion in which an emulsified state is stably maintained over a long period of time has been proposed (see Patent Document 1). However, Patent Document 1 does not mention anything about the oil-in-polyhydric emulsion composition.

  On the other hand, as a method not using a surfactant, there is a method of blending an oil agent such as fats and esters in a polyhydric alcohol preparation. The composition by this method separates into two layers upon standing. Two-layer separated cosmetics using such polyhydric alcohols are also more common than before. For example, one or more selected from polyoxyalkylene adducts of polyhydric alcohols or polymers thereof and / or polyoxyethylene-polyoxypropylene copolymers and one or two selected from cationized polymers There is a two-layer separation type cosmetic that is formulated as described above, has a good feeling of use, and has a good separation / restoration property after use (see Patent Document 2).

  However, the two-layer separated type cosmetic is used by shaking immediately before use. When shaken at the time of use, the polyhydric alcohol layer and the oil agent layer are mixed, and the irritation and sticky feeling due to the use of the polyhydric alcohol. However, the dosage form is unstable because it only temporarily exhibits an emulsified state, and it is difficult to use because it returns to the two layers if left for a while, and the mixing of the two layers is insufficient. However, the problem that a sufficient effect cannot be exhibited remains.

  The inventors of the present invention aimed to overcome the problems of the polyhydric alcohol preparation, and obtained an idea that it could be solved by emulsifying the alcohol preparation and the oil into one agent. As an emulsified cosmetic containing a polyhydric alcohol and an oil agent, for example, there is an oil-in-polyhydric oil-in-water emulsion composition emulsified with an oil component, a hydrophilic nonionic surfactant water-soluble polyhydric alcohol (see Patent Document 3). However, there is no mention of storage stability. Therefore, the present inventor has continued further research and has completed the present invention through various trial manufactures and tests.

Japanese Patent Laid-Open No. 51-55783 JP 11-335237 A JP 2006-241132 A

  In view of the above situation, an object of the present invention is to provide a polyhydric alcohol-in-oil emulsified cosmetic with less irritation, excellent usability, and good storage stability.

  As a result of intensive studies to solve the above problems, the present inventor has found that the above problems can be solved by blending and emulsifying a polyhydric alcohol in an oil agent, a nonionic active agent and an oligoester. The invention has been completed.

That is, the polyhydric alcohol-in-oil emulsified cosmetic of the present invention is characterized by containing the following components (A) to (D).
(A) Polyhydric alcohol (B) Oil agent (C) Nonionic surfactant (D) Oligoester obtained from the following components (a) to (c) (a) Fatty acid or hydroxy fatty acid having 8 to 30 carbon atoms (Linear Or any of the branched chains and either saturated or unsaturated)
(B) C12-C36 linear or branched dibasic acid (c) Glycerin or glycerin condensate

  The oil-in-polyhydric emulsion emulsified cosmetic of the present invention preferably contains no water.

  Since the polyhydric alcohol-in-oil emulsified cosmetic composition of the present invention has the above-described configuration, the polyhydric alcohol layer and the oil agent layer are stably emulsified, so that the irritation and stickiness due to the use of the polyhydric alcohol can be obtained. Alleviated. In addition, since the particles are finely emulsified, the penetration of the preparation into the skin is improved, the familiarity with the skin is improved, and the feeling of use and effects are further improved. Moreover, since it is gelatinized using oligoester, since it adheres to skin, usability, an effect, and storage stability further improve.

  In addition, since the oil-in-polyhydric emulsion emulsified cosmetic of the present invention can be prepared without containing water, it is easily hydrolyzed and unstable in systems where water is present, such as vitamin A and vitamin C. It becomes easy to mix | blend various active ingredients currently mix | blended with skin external preparations.

  According to the present invention, it is possible to provide an oil-in-water type emulsified cosmetic with a polyhydric alcohol that has little irritation, excellent usability, and good storage stability.

  The (A) polyhydric alcohol used in the polyhydric alcohol-in-oil emulsified cosmetic of 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, maltose, xylitol, sorbitol, erythritol, 3-methyl-1,3-butanediol, trehalose and the like may be used. The blending amount of these polyhydric alcohols in the preparation is preferably such that the total blending amount of the polyhydric alcohols is in the range of 5.0 to 80% by mass relative to the oil-in-polyhydric alcohol emulsified cosmetic. Preferably it is the range of 10-70 mass%. In this range, it is possible to obtain a preparation that is excellent in use feeling and can improve safety such as skin irritation.

In addition, as the oil agent (B) used in the polyhydric alcohol-in-oil emulsified cosmetic of the present invention,
There may be mentioned hydrocarbon oils, esters, glyceride oils, silicone oils, etc., and any of them is not particularly limited. Examples of fats and oils include 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, pristane, white petrolatum, paraffin wax and the like. 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. The blending amount of these oils into the preparation is preferably such that the total blending amount of the oils is in the range of 10 to 85% by weight, more preferably 20 to 80% by weight with respect to the oil-in-water type emulsion cosmetic in polyhydric alcohol. % Range. In this range, it is possible to improve the safety such as skin irritation, and to obtain a pleasant touch preparation.

  The (C) nonionic surfactant used in the oil-in-polyhydric oil emulsified cosmetic of the present invention is, for example, one or more surfactants selected from the group consisting of sorbitan fatty acid esters and polyglycerol fatty acid esters. Can be used. Of these, polyglyceryl monoisostearate, which is known for its high safety, is preferred. The amount of these surfactants to be added to the preparation is preferably such that the total amount of the surfactants is in the range of 0.1 to 15% by mass with respect to the oil-in-polyhydric emulsion emulsified cosmetic. Preferably it is the range of 1.0-10 mass%. In this range, it is possible to improve the safety such as skin irritation while stably blending, and to obtain a pleasant product. Moreover, in this invention, it is also possible to use the various surfactant conventionally used for cosmetics other than said various surfactant.

The (D) oligoester used in the oil-in-polyhydric emulsion emulsified cosmetic of the present invention is (a) a fatty acid or hydroxy fatty acid (either linear or branched, and saturated or saturated with 8 to 30 carbon atoms). Obtained by esterification of (b) a linear or branched dibasic acid having 12 to 36 carbon atoms and (c) glycerin or a glycerin condensate by a known method. Product. (D) C8-C30 fatty acid or hydroxy fatty acid (either linear or branched and either saturated or unsaturated) used in this (D) oligoester is a hydrocarbon Group or hydroxy hydrocarbon group may be linear or branched, and may be saturated or unsaturated, such as oleic acid, myristic acid, palmitic acid, lauric acid, Examples include stearic acid, behenic acid, isostearic acid, 12-hydroxystearic acid, and octanoic acid. (B) Examples of the linear or branched dibasic acid having 12 to 36 carbon atoms include eicosane diacid, 1,7-ethyloctadecanedioic acid, dodecanedioic acid and the like. (C) As glycerin or a glycerin condensate, a glycerin condensate is a polyglycerin having a degree of polymerization of 2 or more, preferably 2 to 10, such as diglycerin, triglycerin, tetraglycerin, hexaglycerin, decaglycerin and the like. These can be exemplified, and these can be used alone or as a mixture containing glycerin. Among these oligoesters, those composed of behenic acid, (b) eicosanedioic acid, and (c) glycerin or glycerin condensate, which are compounds represented by the following general formula (1), are particularly preferable. These are marketed as “Nom Coat HK-G”, Nom Coat “HK-P” and “Nom Coat SG” by Nisshin Oilio Group Co., Ltd. and are easily available. The amount of these oligoesters to be blended in the preparation is preferably such that the total amount of the oligoesters is in the range of 0.1 to 15% by mass relative to the oil-in-polyhydric emulsion emulsified cosmetic. It is the range of 1.0-10 mass%. Within this range, it is possible to obtain a good-feeling preparation having good usability and storage stability such as separation while being stably blended.

(Wherein R represents a substituent represented by the following general formula (2) or hydrogen)

  The oil-in-alcohol emulsified cosmetic of the present invention can be produced by the same method as that for ordinary emulsified cosmetics. For example, an appropriate amount of oil agent (component (B)), an appropriate amount of nonionic surfactant (component (C)), and an appropriate amount of oligoester (component (D)) are uniformly dissolved at 80 ° C. Next, an appropriate amount of polyhydric alcohol (component (A)) is added little by little to emulsify, then the temperature is lowered to 30 ° C., and stirring is stopped. The mixing ratio of the component (A) (polyhydric alcohol layer) and the component (B) (oil agent layer) is arbitrary in the range of 5 to 90 to 95 to 10 by mass ratio. Moreover, the mixture ratio of a component (C) (nonionic surfactant): component (B) (oil agent layer) is arbitrary by the ratio of 1-50 to 99-50 by mass ratio. Furthermore, the blending ratio of component (D) (oligoester): component (B) (oil agent layer) is arbitrary at a ratio of 1 to 50 to 99 to 50 in weight ratio.

In addition to the surfactants described above, various surfactants can be blended in the oil-in-oil emulsified cosmetic of the present invention. For example, propylene glycol fatty acid ester, polyethylene glycol fatty acid ester, sucrose fatty acid ester, polyoxyethylene alkyl ether, polyoxypropylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkyl ether Oxyethylene sorbitol fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyoxyethylene propylene glycol fatty acid ester, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene phytostanol ether, polyoxyethylene phytosterol ether, polyoxyethylene Cholestanol ether, polyoxyethylene cholesteryl ester Ether, alkanolamides,
Nonionic and amphoteric surfactants such as sugar ethers, sugar amides, betaines, aminocarboxylates, and imidazoline derivatives are preferred.

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

  Examples of the oil-in-oil emulsified cosmetics of the present invention include skin cosmetics such as cosmetic liquids, packs, hand creams, and lip essences, and hair cosmetics such as hair creams and hair treatments. Further, the form of the product is not particularly limited, but it can be applied to liquid, paste, solid and the like.

  In addition, the presence or absence of water blending in the oil-in-polyhydric oil emulsified cosmetic of the present invention is not particularly limited. However, since it can be adjusted substantially without containing water, it is extremely hydrolyzed in a system in which water is present. It becomes easy to mix | blend various active ingredients currently mix | blended with the skin external preparations, such as vitamin A, vitamin C, etc. which are easy to be performed and unstable. Here, “substantially” means that water is not blended as a component (non-aqueous), and a trace amount that can be contained in the raw material stage or in the production process unless the purpose of the polyhydric alcohol-in-oil emulsified cosmetic of the present invention is impaired. Tolerate moisture. When water is blended, the gelling power of the oligoester is reduced, and the viscosity of the polyhydric alcohol oil-type emulsified cosmetic is lowered. Therefore, it is particularly preferable not to blend water in terms of adhesion to the skin and storage stability. It becomes more desirable in the effect.

  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 description of this invention including the following test examples, all the mixture ratios are the mass%.

<< Examples 1-4, Comparative Examples 1-4 >>
(sensory evaluation)
A polyhydric alcohol-in-oil emulsified cosmetic was prepared by a conventional method, and cosmetics of Examples 1 to 3 and Comparative Examples 1 to 5 were prepared. These eight types of cosmetics are used by 20 skilled panelists, respectively. (I) Feeling of use (2 items of moistness and non-stickiness) (b) Feeling (no irritation and good skin familiarity) ), (C) Sensory evaluation was performed on six items of (1) ease of use (1 item) and (d) storage stability (1 item), and the evaluation shown in Table 1 was obtained. The evaluation criteria are shown below.

Number of people who answered “good” among 20 people Evaluation 15 people or more ◎
10-14 people ○
5-9 people △
0-4 people ×

(Stability evaluation)
Put the oil-in-oil emulsified cosmetic in polyhydric alcohol in each thermostatic bath at 5 ° C, 20 ° C, 45 ° C and observe if there is no change in quality for 3 months. What was observed was marked with Δ, and what was abnormal was marked with ×.

Example 5
Lip Essence Glycerin 19.0
Squalane 48.0
Glyceryl triisostearate 15.0
Isostearic acid 5.0
Polyglyceryl monoisostearate 4.0
(Behenic acid / eicosanedioic acid) Glyceryl 5.0
Ceramide 2 1.0
Hydrogenated lecithin 1.0
Cholesterol 0.5
Licorice powder (Ricolex NA Maruzen Pharmaceutical Co., Ltd.) 0.1
Perfume appropriate amount

The lip essence of Example 5 was easy to use, non-irritating, moist and excellent in storage stability.

Example 6
Essence glycerin 19.0
1.3 Butylene glycol 20.0
Squalane 20.0
Grape seed oil 5.0
Glyceryl triisostearate 15.0
Isostearic acid 5.0
Polyglyceryl monoisostearate 3.0
Polysorbate 60 2.0
(Behenic acid / eicosanedioic acid) polyglyceryl-10 3.0
(NOMCOAT HK-P Nisshin Oillio Group, Inc.)
(Behenic acid / eicosanedioic acid) Glyceryl 3.0
Ceramide 2 1.0
Hydrogenated lecithin 1.0
Cholesterol 0.5
VE Nicotinate 0.1
VA 0.1
VB 0.1
Licorice powder (Ricolex NA Maruzen Pharmaceutical Co., Ltd.) 0.1
Perfume appropriate amount

The cosmetic liquid of Example 6 had no irritation, good skin fit, no stickiness, moist feeling, and excellent storage stability.

Example 7
Hand cream Glycerin 10.0
1.3 Butylene glycol 25.0
Squalane 8.0
α-olefin oligomer 20.0
Glyceryl triisostearate 15.0
Isostearic acid 5.0
Polyglyceryl monoisostearate 3.0
Glyceryl stearate 2.0
(Behenic acid / eicosanedioic acid) Glyceryl 5.0
Ceramide 2 1.0
Hydrogenated lecithin 1.0
Cholesterol 0.5
VE Nicotinate 0.1
α-glycosyl hesperidin 1.0
Perfume appropriate amount

  The hand cream of Example 7 had good skin familiarity, moist feeling, and excellent storage stability.

Example 8
Hair treatment Glycerin 40.0
1.3 Butylene glycol 15.0
Liquid paraffin 23.0
Polyglyceryl monoisostearate 5.0
POE-60 hydrogenated castor oil 1.0
Stearyl alcohol 5.0
Isostearic acid 5.0
Stearyltrimethylammonium chloride 1.0
(Behenic acid / eicosanedioic acid) Glyceryl 3.0
Ceramide 2 1.0
Dimethylpolysiloxane (5000CS) 1.0
VE Nicotinate 0.1
Perfume appropriate amount

  The hair treatment of Example 8 had no stickiness, was moist and had excellent storage stability.

Claims (2)

A polyhydric alcohol-in-oil emulsified cosmetic containing the following components (A) to (D).
(A) Polyhydric alcohol (B) Oil agent (C) Nonionic surfactant (D) Oligoester obtained from the following components (a) to (c) (a) Fatty acid or hydroxy fatty acid having 8 to 30 carbon atoms (Linear Or any of the branched chains and either saturated or unsaturated)
(B) a linear or branched dibasic acid having 12 to 36 carbon atoms (c) glycerin or a glycerin condensate The oil-in-water emulsified cosmetic in polyhydric alcohol according to claim 1, which does not contain water.