JPH1087425A - Oil and water mixture composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition excellent in temporal stability, safety, moisture-retaining effect and persistency by compounding an oil phase component containing a specific polyether-modified silicone and a specific oil component each in a specific amount and a water phase component containing a moisture-retaining agent, at a ratio in a certain range. SOLUTION: This oil and water mixture composition is obtained by compounding an oil phase component containing a polyether-modified silicone (0.1-10.0wt.%) of the formula [(m) is 50-1000; (n) is 1-40; (a) and (b) are each 5-50] and an oil component (1.0-70.0wt.%) which is solid or semi-solid at normal temperature and a water phase component containing a moisture-retaining agent (1.0-70.0wt.%). Preferably, the oily water mixture composition is substantially free from a compounded surfactant. Further, it is preferable to compound both phase components at a ratio (oil phase component : water phase component) of (1:4) to (4:1). It is preferable that micro-crystalline wax, etc., is used as the oil component and 1,3-butylene glycol, etc., is used as the moisture- retaining agent. The composition is free from stickiness and foreign feeling to the skin, and capable of preventing dryness of the skin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil-water mixture composition used as a cosmetic or pharmaceutical base, and more particularly, it is excellent in stability over time and safety, has less stickiness and discomfort to the skin, The present invention relates to an oil-water mixture composition having a large moisturizing effect for preventing skin dryness and having an excellent durability.

[0002]

2. Description of the Related Art In cosmetics and pharmaceuticals, oil-in-water emulsions or water-in-oil emulsions containing an aqueous phase component and an oil phase component as main components, such as emulsions, creams and ointments, are used as dosage forms. There is something. Conventionally, when producing these oil-in-water emulsions or water-in-oil emulsions,
Surfactants are usually used. However, conventionally used surfactants may cause irritation to the skin, and many consumers have anxiety. In addition, oil-in-water emulsions and water-in-oil emulsions using these surfactants are unstable with time, or become organoleptically unpleasant to give a sticky feeling of use, and further have poor water resistance. And so on. Against this background, emulsions that use as little surfactant as possible and that do not use surfactants have been developed.
For example, a clay mineral (Japanese Unexamined Patent Publication No.
No. 150007, Japanese Patent Application Laid-Open No. 57-16812, Japanese Patent Publication No. Sho 6
Emulsions using, as an emulsifier or an emulsifying aid, silicone oil (Japanese Patent Application Laid-Open No. Sho 61-66527), glycyrrhizin (Japanese Patent Application Laid-Open No. 57-62214), and the like are known. ing.

[0003]

However, such an emulsion not using a surfactant is very difficult to obtain a stable emulsion over time,
It is hard to say that it completely solved the problems of feel and safety. The present invention has been made from such a viewpoint,
Substantially no surfactant as an emulsifier, excellent in stability over time and safety, less sticky and uncomfortable to the skin, great moisturizing effect to prevent drying of the skin, long lasting effect An object is to provide an excellent oil-water mixture composition.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that polyether-modified silicone and oil containing a specific amount of solid or semi-solid oil at normal temperature are contained. When the phase component and the aqueous phase component containing the humectant are blended in a certain ratio, the aging effect is excellent in stability over time and safety, less sticky and uncomfortable to the skin, and prevents the skin from drying out. The present inventors have found that an oil-water mixture composition which is large and has excellent durability can be obtained, and the present invention has been completed.

That is, the present invention provides an oil phase component containing a polyether-modified silicone represented by the following general formula (1) and a solid or semi-solid oil component at room temperature, and an aqueous phase containing a humectant. It is an oil-water mixture composition characterized by blending components.

[0006]

Embedded image

(Wherein, m is an integer of 50 to 1000, n is an integer of 1 to 40, and a and b are integers of 5 to 50.) The oil-water mixture composition of the present invention can be used for cosmetics, pharmaceuticals, The present invention is applicable to quasi-drugs and the like applied to outer skin and hair.

Hereinafter, the configuration of the present invention will be described in detail. The polyether-modified silicone contained in the oil phase component of the present invention is an organopolysiloxane having a polyoxyalkylene group represented by the above general formula (1). For example, those disclosed in JP-A-5-31076 are disclosed. No.

In the polyoxyalkylene group,
When a or b is less than 5, the polyether-modified silicone does not show a sufficient time-stabilizing effect, and when a or b exceeds 50, the obtained oil-water mixture composition gives a sticky feeling. Will have.

[0010] The content of the polyoxyalkylene group is not particularly limited.
It is desirable to have more than% by weight. This is because when the content of the polyoxyalkylene group is 20% by weight or less, the effect of stabilizing the polyether-modified silicone over time is significantly reduced.

M is an integer of 50 to 1000;
n is an integer of 1 to 40, preferably m is 200 to
600, n is 5-20. This is because when m is less than 50 and n is less than 1, stability over time is poor, and when m exceeds 1000 and n exceeds 40, the obtained oil-water mixed composition This is because it becomes sticky.

The molecular weight of the polyether-modified silicone used in the present invention is not particularly limited, and its viscosity at 25 ° C. is not particularly limited. The polyether-modified silicone used is preferably one having a viscosity of 1,000 to 100,000 cps in a 50% by weight solution of octamethyltetrasiloxane or isoparaffin. The molecular weight is 50,000 or more, preferably 500, from the viewpoint of stability and usability.
The range of 00 to 80000 is preferred.

The amount of the polyether-modified silicone in the present invention is 0.1 to 1 with respect to the total amount of the oil-water mixture composition.
0.0% by weight is preferred, and more preferably 0.5 to
5.0% by weight. If the amount is less than 0.1% by weight, there is a problem in stability at high temperatures, and if it exceeds 10.0% by weight, stickiness occurs in usability.

Examples of the solid or semi-solid oil component at room temperature contained in the oil phase component of the present invention include waxes (eg, microcrystalline wax, beeswax), solid paraffin, hardened oil, Beef tallow, mokuro, beeswax, candelilla wax, carnauba wax, ceresin, vaseline, lanolin, lanolin derivatives, higher alcohols (eg cetanol, stearyl alcohol),
Cholesterol, cholesterol derivatives and the like can be mentioned. Of these, microcrystalline wax and petrolatum are most preferable in terms of effect. The amount of such an oil component is 1.0 to 70.0% based on the total amount of the oil-water mixture composition.
% By weight, more preferably from 5.0 to 40.0% by weight.
% By weight. When the amount is less than 1.0% by weight, there is a problem in stability at a high temperature. On the other hand, when the amount exceeds 70.0% by weight, the material becomes too hard to use. In addition, when only liquid oil is used without using solid or semi-solid oil, syneresis occurs with time.

As the oil phase component of the present invention, in addition to the above-mentioned polyether-modified silicone and a solid or semi-solid oil at normal temperature, talc, silk powder, nylon powder, silicone powder, polytetrafluoroethylene powder And powder components such as hydrophobized powder; hydrocarbons such as liquid paraffin and squalane; animal and plant extracted oils such as olive oil, macadamia nut oil, camellia oil, jojoba oil, and liquid lanolin; silicone oils, perfluorinated oils, fatty acids, octanol, hexyldecanol Octyldodecanol, octyldodecanol, etc .; isopropyl myristate, octyldodecyl myristate, isopropyl palmitate, etc .; various drugs include vitamin A and its derivatives, ascorbic acid dipalmitate, α-tocopherol, β-tocophere. Rolls, γ-tocopherol, vitamin E acetate, vitamin E nicotinate, vitamins such as vitamin D; nicotinamide, benzyl nicotinate, γ-oryzanol, bisabolol, thymol,
Pantothenyl ethyl ether, ethinyl estradiol, fragrance, oil-soluble antioxidant, oil-soluble ultraviolet absorber and the like can be contained.

In the present invention, the oil phase preferably forms a continuous phase.

The humectant used in the present invention includes polyethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, glycerin, diglycerin, sorbitol, maltitol, mucopolysaccharide, hyaluronic acid, chondroitin sulfate, erythritol , Trimethylglycine, lactic acid, sodium lactate,
And sodium pyrrolidonecarboxylate. Among them, 1,3-butylene glycol and glycerin are most preferable in terms of stability and skin roughness improving effect. The compounding amount of these humectants is 1.0 to the total amount of the oil-water mixture composition.
To 70.0% by weight, more preferably 5.0% by weight.
４40.0% by weight. When the amount is less than 1.0% by weight, there is a problem in stability at a high temperature.
If it exceeds 0% by weight, the stickiness becomes too sticky and the usability deteriorates.

The aqueous phase component of the present invention includes, in addition to the above humectants, powder components such as titanium oxide, mica and cellulose powder; paraoxybenzoic acid esters as preservatives;
Benzoic acid, sodium benzoate, sorbic acid, potassium sorbate, phenoxyethanol, etc .; as various drugs, vitamin B ₆ hydrochloride, vitamin B ₆ tripalmitate, vitamin B ₆ dioctanoate, vitamin B ₂ and its derivatives, vitamin B ₁₂ , vitamin B such as vitamin B ₁₅ and its derivatives, ascorbic acid, ascorbic acid sulfate ester (salt), ascorbic acid phosphate ester (salt), vitamin C such as ascorbic acid diglucoside
, Vitamins such as vitamin H, pantothenic acid, and pantethine; allantoin, glycyrrhizic acid (salt), glycyrrhetinic acid and its derivatives, hinokitiol, inositol, saponins (psychosaponins, carrot saponins, hemimasaponins, muclodisaponins), tranexam An acid, a placenta extract, a pigment, a sequestering agent, a water-soluble antioxidant, a water-soluble ultraviolet absorber, a coating agent and the like can be contained.

In the present invention, the ratio (weight ratio) of the oil phase component to the aqueous phase component is such that the ratio of the oil phase component to the aqueous phase component is 1: 4 to 4: 1.
Is preferred. If the ratio of the oil phase component to the water phase component is out of this range, syneresis and oiliness occur.

In the oil-water mixture composition of the present invention, in addition to the above essential components, components other than surfactants generally used in external preparations for skin such as cosmetics and pharmaceuticals impair the desired effects of the present invention. It can be blended in a range that does not exist.

[0021]

The present invention will be described in more detail with reference to examples of the present invention, but the present invention is not limited to these examples. Prior to Examples, evaluation items and evaluation criteria of the effect test of the present invention will be described in detail.

(1) Stability evaluation test Each sample was stored in a thermostat at -10 ° C, 0 ° C, 5 ° C, 30 ° C, and 45 ° C for 3 months, and changes in color tone, odor, appearance properties, and usability were observed. Was evaluated according to the following criteria. (Evaluation criteria) A: There is no change in any of color tone, smell, appearance properties, and feeling of use. ：: There is almost no change in any of color tone, smell, appearance properties, and usability. X: Change was observed in any of color tone, smell, appearance properties, and feeling of use.

(2) Sensory evaluation test Thirty female panelists used each sample, and evaluated the stickiness, uncomfortable feeling to the skin, moist feeling and the persistence of moist feeling according to the criteria in Table 1 below. I asked.

(3) Utility test Twenty female panelists asked each face to use each sample for one month every night, and the effect of improving skin roughness was evaluated according to the criteria shown in Table 1 below.

[0025]

[Table 1]

Based on the obtained evaluation points, the samples were evaluated according to the following criteria. ：: 1.5 or more evaluation points average. Δ: Evaluation point average 0.5 points or more and less than 1.5 points. X: Evaluation point average is less than 0.5 point.

Examples 1 to 5 and Comparative Examples 1 to 6 The cosmetics of Examples 1 to 5 and Comparative Examples 1 to 6 were prepared according to the formulations shown in Tables 2 and 3, and the evaluation test was performed. The test results are shown in Table 4. In addition, these cosmetics were prepared by a method in which an oil phase and an aqueous phase were dissolved and mixed, followed by stirring and cooling. The blending amounts in Tables 2 and 3 are% by weight.

[0028]

[Table 2] ──────────────────────────────── Example of implementation ─────────── １ 1 2 3 4 5 ──────────────────────────────── Water phase Purified water 5.0 35.0 20.0 15.0 10.0 Glycerin 10.0 5.0---1,3-butylene glycol--10.0 5.0-Polyethylene glycol 1500 20.0 10.0 15.0-15.0 Polyethylene glycol 6000 5.0 5.0---Polyethylene glycol 20000-5.0 5.0-15.0 Cellulose powder---5.0-──油 Oil phase Liquid paraffin 15.0 20.0 18.0-15.0 Squalane---19.0-Dimethyl polysiloxane (5cs ) − − − 5.0 − Decamethylcyclopentasiloxane 25.0 3.0 − 20.0 24.0 Polyether-modified silicone ^{* 1)} 8.0 10.0 8.0 6.0 6.0 Vaseline 5.0 − 14.0 10.0 10.0 Microcrystalline wax 5.0 7.0 10.0 15.0 5.0 Silicon powder 2.0 − − − − ──────────────── ────────────────

[0029]

[Table 3] Comparative example 例────── 1 2 3 4 5 6 ───────────────────────────────── Water phase Purified water 50.0 18.0 2.0 40.0 35.0 20.0 Glycerin-6.0-5.0 5.0-1,3-butylene glycol 5.0-----Polyethylene glycol 1500 5.0--5.0 10.0-Polyethylene glycol 6000----5.0-Polyethylene glycol 20000--20.0 10.0 5.0 − Cellulose powder − − − − − 5.0 ───────────────────────────────── Oil phase Liquid paraffin 15.0 52.0 − 10.0 20.0-Squalane-9.0 3.0-7.0 19.0 Dimethyl polysiloxane (5cs) 15.0--20.0-5.0 Le Cyclopentasiloxane 10.0 10.0 - 5.0 3.0 20.0 Polyether-modified silicone ^{* 1)} - - - - 10.0 6.0 Vaseline - - 35.0 - - 10.0 Microcrystalline wax - 5.0 40.0 5.0 - 15.0 Silicon Powder - - - - - - ─── ──────────────────────────────

[0030]

[Table 4] ────────────────────────────────── Example Comparison Example {1 2 3 4 5 5 1 2 3 4 5 6}安定 Stability ◎ ◎ ◎ ◎ ○ × × ○ ○ × × ─────────────────────────性 Usability Moist feeling ○ ○ ○ ○ ○ × × ○ △ ○ × Persistence of moist feeling ○ ○ ○ ○ ○ × × ○ × ○ × Uncomfortable feeling to skin ○ ○ ○ ○ ○ × × ○ × × × Sticky ○ ○ ○ ○ ○ ○ ○ × △ ○ ○ ───────────────────────────────── ─ Usefulness Skin roughness improvement effect ○ ○ ○ ○ △ ○ ○ × ○ ○ × ───────────────────── ─────────────

* 1) In the general formula (1), m = 400, n = 1
0, a = 24, b = 24

[0032]

As described above, the oil-water mixture composition of the present invention is excellent in stability over time, less sticky and uncomfortable to the skin, and has a large moisturizing effect for preventing the skin from drying. It has excellent sustainability.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenzo Ito 1050 Nippa-cho, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Inside Shiseido Daiichi Research Center Co., Ltd.

Claims (4)

[Claims] An oil phase component containing a polyether-modified silicone represented by the following general formula (1), a solid or semi-solid oil component at normal temperature, and an aqueous phase component containing a humectant. An oil-water mixture composition, characterized in that: Embedded image (In the formula, m is an integer of 50 to 1000, n is an integer of 1 to 40, and a and b are integers of 5 to 50.) 2. The oil-water mixture composition according to claim 1, wherein the composition does not substantially contain a surfactant. 3. The polyether-modified silicone is contained in an amount of 0.1 to 10.0% by weight based on the total amount of the composition, and at room temperature, a solid or semi-solid oil component is added to the total amount of the composition.
The oil-water mixture composition according to claim 1, wherein the composition comprises 0 to 70.0% by weight and a humectant in an amount of 1.0 to 70.0% by weight based on the total amount of the composition. 4. The method according to claim 1, wherein the ratio of the oil phase component to the aqueous phase component is:
The oil-water mixture composition according to any one of claims 1 to 3, wherein the aqueous phase component is 1: 4 to 4: 1.