KR100245796B1 - A water-in-oil type cosmetic composition having low viscosity - Google Patents

Abstract

The present invention relates to a water-in-oil cosmetic composition of low viscosity, and more particularly, a silicone-based lipophilic surfactant is blended on an oil mixed with a volatile silicone oil and an ester-based or triglyceride-based polar oil, and an acryl-based organic solvent is added to an aqueous phase. The present invention relates to a water-in-oil type cosmetic composition having excellent low viscosity stability exhibiting usability corresponding to the feel of oil-in-water type cosmetics while maintaining the sustainability and water resistance of the water-in-oil cosmetics by increasing the amount of the thickener.

Description

Low viscosity water-in-oil cosmetic composition

The present invention relates to a water-in-oil cosmetic composition of low viscosity, and more particularly, a silicone-based lipophilic surfactant is blended on an oil mixed with a volatile silicone oil and an ester-based or triglyceride-based polar oil, and an acryl-based organic solvent is added to an aqueous phase. The present invention relates to a water-in-oil type cosmetic composition having excellent low viscosity stability exhibiting usability corresponding to the feel of oil-in-water type cosmetics while maintaining the sustainability and water resistance of the water-in-oil cosmetics by increasing the amount of the thickener.

In general, water-in-oil cosmetics are emulsions in which the aqueous phase is dispersed in the oil phase in the form of particles. Since the continuous phase is an oil, it is an excellent product or makeup that is not easily washed by water or sweat. It is mainly used for cup base, and it is possible to mix unstable skin active substance, and it is very excellent compared to oil-in-water cosmetics for lasting effect and skin moisturizing effect. However, since the external wound is an oily ingredient, it is unpleasant to use such as heavy and sticky when applied to the skin, and a large amount of oily ingredient is used, which has a disadvantage in terms of price.

In addition, in terms of stability, since oil molecules have a competitive interfacial adsorption property with respect to the surfactant in terms of emulsification, the function of the surfactant is lowered, and the penetration of the interfacial membrane weakens the interface membrane, thereby reducing the stability of the emulsion system. The stability of the emulsion was drastically reduced, such as oil phase was easily separated or developed into an oil-in-water type, and a satisfactory practical formulation could not be obtained.

Therefore, in the water-in-oil cosmetics, for the purpose of usability corresponding to the feel of oil-in-water cosmetics, to improve the stability of the emulsion system, to limit the oil content, and to limit the type of surfactant blended in the oil phase And a method of blending an oil thickener has been sought.

As another example, Korean Patent Application Publication No. 95-26504 discloses a carboxyvinyl polymer and its water phase while reducing the amount of oil and increasing the amount of water (80% or more) in the water phase for the purpose of feeling the use of oil-in-water cosmetics. A method of combining and stabilizing derivatives is proposed. However, since the oil-in-water type exhibits a usability that is inferior to that of the oil-in-water type, and since a large amount of water-based components are emulsified to high viscosity due to widening of the surface area by artificial mechanical force, most of the formulations are limited to creams, thereby increasing the variety of products. Not satisfied In addition, high-viscosity cream type is easily phased into oil-in-water emulsion during manufacture, it is difficult to operate the emulsifier with too much internal phase, so that it does not mix, it takes a long time to emulsify. In addition, there is a fear that the viscosity decreases with time and the change over time occurs severely, degrading the value as a product.

Accordingly, the inventors of the present invention, while studying the water-in-oil emulsion having excellent low viscosity stability showing usability corresponding to the feel of oil-in-water cosmetics while maintaining the persistence and water resistance of the water-in-oil cosmetics, carboxyvinyl polymer in the water phase While acryl-based organic thickeners are compounded, silicone-based and ester-based oil phases are blended with silicone-based surfactants having strong lipophilic and water resistance properties to retain the aqueous phase particles in the oil phase, thereby preventing the incorporation into the oil phase. The present invention has been completed by discovering that low water-in-oil emulsification is possible even when a large amount of internal phase is used.

Accordingly, an object of the present invention is to provide a water-in-oil type cosmetic composition having excellent stability of low viscosity exhibiting usability corresponding to the feel of oil-in-water cosmetics while maintaining the durability and water resistance of the water-in-oil cosmetic.

In order to achieve the above object, the water-in-oil cosmetic composition according to the present invention,

5 to 20% by weight of an oil phase mixed with a lipophilic surfactant, a volatile silicone oil and an ester or triglyceride polar oil;

As a water-in-oil type cosmetic consisting of an acrylic organic thickener and its aqueous phase containing 80 to 95% by weight containing a neutralizer and a polyol,

The lipophilic surfactant is a silicone-based lipophilic surfactant having an HLB value of 2 to 6, and is blended in an amount of 0.5 to 10.0% by weight;

The acrylic organic thickener is at least one selected from the group consisting of carboxyvinyl polymer, acrylate / C _10-30 alkyl acrylate crosslinked polymer, and glyceryl polymethacrylate / propylene glycol crosslinked polymer, In amounts of%;

The neutralizing agent is at least one selected from the group consisting of sodium hydroxide, potassium hydroxide, ammonium hydroxide and triethanolamine, and is formulated so that the pH of the composition is 5.0 to 7.5;

The polyol is one or more selected from the group consisting of glycerin, propylene glycol, 1,3-butylene glycol and sorbitol, and is characterized in that it is blended in an amount of 1.0 to 50% by weight.

Hereinafter, each component which comprises the water-in-oil cosmetic composition of this invention is demonstrated more concretely.

The present invention provides a water-in-oil emulsion, and the lipophilic surfactant blended in the oil phase is a dimethicone copolyol having an HLB value of 2 to 6, and ethylene or propylene oxide is added to the silicon main chain or the side chain at low viscosity and low molecular weight. It is. Among them, dimethicone copolyol is particularly preferable since it exhibits the lowest viscosity effect. It is mix | blended in the range of 0.5-10.0 weight% with respect to the total weight of a composition, Preferably it is 1.0-5.0 weight%.

In addition, volatile silicone oil which is a nonpolar oil which comprises an oil phase, and ester type or triglyceride type oil which are polar oils can be mix | blended suitably within the weight ratio range of 1: 99-99: 1 according to a formulation. Polar oils include cetylethylhexanoate, isopropyl myristate, isopropyl stearate, caprylic capric triglyceride, octyl palmitate, alkyl (14,16,18) 2-ethylhexanoate, octyldodecyl myri State, octyldodecanol, hexyllaurate and the like can be used.

The oil phase can be used in 5 to 20% by weight of the total weight of the composition, and when it exceeds 20% by weight, the feeling becomes heavy, and when it is less than 5% by weight, it is difficult to form an emulsion or a high-viscosity cream is formed. Will occur.

In addition, as the aqueous phase component used in the present invention, a polyol having a relatively high refractive index is used as compared to an outer phase made of an oil having a relatively small refractive index value in order to have a transparent or translucent appearance. An acrylic organic thickener is added to this, and it is neutralized and adjusted to pH 5.0-7.5.

Conventional water-in-oil emulsions compensate for their own feelings of weakness to maintain the same feeling as in oil-in-water types, but only high-viscosity creams are produced during manufacturing, which impedes emulsifiers and takes a lot of time to form formulations. . The present invention solves this problem by using the same amount of an aqueous component and an oily component is easy to manufacture, low viscosity, transparent or translucent formulation is possible to achieve a variety of formulations, as well as all made of a liquid room temperature It is possible to manufacture in. Therefore, it is possible to mix vitamin A palmitate, which is a skin active substance that is weak to heat, and can be produced in a simple manufacturing process that does not require heating or cooling.

Hereinafter, the configuration of the water-in-oil cosmetic composition according to the present invention and its working effects will be described in more detail based on Examples and Test Examples. However, the present invention is not limited to these examples.

<Examples 1-4 and Comparative Examples 1-4>

Raw material name Example Comparative example One 2 3 4 One 2 3 4 Oily ingredients Cyclomethiconethylethylhexanoatecapryliccaprictriglycerideoctylpalmitatefluidparaffinmethylphenylpolysiloxane sesquioleic acid sorbitan (HLB = 4.7) dimethicone cocopolyol (HLB = 4.0) Organic Hectorite Flavor 8.02.02.0 ---- 3.0--appropriate 8.02.02.0 ----- 3.0-appropriate 8.02.02.0 ---- 3.0--appropriate 8.04.0 ----- 3.0--appropriate 6.0--4.02.03.03.0 --- appropriate 6.0--4.02.03.03.0 --- appropriate 8.02.0--2.0--3.0-0.5 8.02.0--2.0 --- 3.00.5 Aqueous component Purified water Glycerin 1,3-butylene glycol preservative Carboxy vinyl polymer acrylate / C _10-30 alkyl acrylate crosslinked polymer sodium chloride potassium hydroxide to 1004.04.00.50.5--0.2 to 1004.04.00.50.5--0.2 to 1004.04.00.5-0.5-0.2 to 10025.025.00.50.5--0.2 to 1004.04.00.51.0--0.4 to 1004.04.00.5-1.0-0.4 to 1008.0-0.5--1.0- to 1008.0-0.5--1.0-

<Manufacturing method>

(1) the oily ingredients were mixed uniformly,

(2) separately added the remaining aqueous components to purified water and mixed uniformly;

(3) (2) was gradually added to (1) at room temperature under stirring, and a transparent or white emulsion was obtained.

<Test Example 1> Appearance and Usability Comparison

Relative comparative evaluation was performed on 50 women in their 20s and 40s by the sensory evaluation method. The results are shown in Table 1.

division Example Comparative example One 2 3 4 One 2 3 4 Appearance after application ◎◎◎◎◎ ◎◎◎◎◎ ◎◎◎◎◎ ◎ ○○ ◎◎ ○○○ △ ○ ○○○ △ ○ ○ △△ × ○ ○ △△ × ○ Co., Ltd. ◎: Very good, ○: Good, △: Normal, ×: Bad

From the results of the above table, it can be seen that the water-in-oil cosmetic of the present invention is far superior in usability than the conventional one.

<Test Example 2> Viscosity Comparison

After preparing the water-in-oil emulsions of the examples and the comparative examples, the viscosity at 30 ° C. was compared the next day. Viscosity is a value measured at 12 rpm for 2 minutes by Brookfield LVDVII ⁺ .

division Example Comparative example One 2 3 4 One 2 3 4 Viscosity (cps) 3,500 5,000 3,500 4,000 27,000 25,000 30,000 35,000

As shown in the table above, it can be seen that the water-in-oil cosmetic of the example is in the form of a low viscosity emulsion having excellent fluidity and ease of use, while the water-in-oil cosmetic of Comparative Example 5 has a considerably high viscosity having the appearance of a cream. It can be seen that.

<Test Example 3> Stability Comparison

With respect to the water-in-oil cosmetics obtained in Examples and Comparative Examples, the composition stability with temperature change was confirmed. The results are shown in Table 3.

division Example Comparative example One 2 3 4 One 2 3 4 Room temperature 1 month 3 months ◎◎ ◎◎ ◎◎ ◎◎ ◎◎ ◎◎ ◎◎ ◎◎ 0 ℃ 1 month 3 months ◎◎ ◎◎ ◎◎ ◎◎ ◎◎ ◎◎ ◎◎ ◎◎ 37 ℃ 1 month 3 months ◎◎ ◎◎ ◎◎ ◎◎ ◎ ○ ◎ ○ ◎ △ ◎ △ 45 ℃ 1 month 3 months ◎◎ ◎◎ ◎◎ ◎◎ ◎ ○ ◎ ○ △ × △ × Co., Ltd. ◎: Very good, ○: Good, △: Normal, ×: Separation

Based on the above test examples, the composition of this invention is shown as an Example which consists of several formulations.

<Example 5> Nutritional lotion

Raw material name Content (% by weight) Cyclomethiconethylethylhexanoatecapryliccaprictriglyceridedimethiconepolycopolyolpolymethylmethacrylateflavored glycerin1,3-butylene glycol paraoxybenzoic acid methylparaoxyan saccharic acid ester carboxyvinyl polymer potassium hydroxide 9.03.02.03.02.0 Suitable for 5.05.00.20.10.30.1to 100

<Example 6> Essence

Raw material name Content (% by weight) Cyclomethiconethylethylhexanoate isopropyl myristate dimethicone polycopolyol polymethyl methacrylate flavoring glycerin 1,3-butylene glycol paraoxybenzoic acid methyl paraoxyansulfonic acid ester carboxyvinyl polymer potassium hydroxide 8.05.02.03.01.0 Quantity 20.020.00.20.10.50.2to 100

<Example 7> Sun lotion

Raw material name Content (% by weight) Octylmethoxycinnamatecyclomethiconeisopropylmyristatedimethiconecopolyol flavorings titanium dioxide glycerin1,3-butylene glycol paraoxybenzoic acid methyl paraoxyansonic acid ester carboxyvinyl polymer potassium hydroxide 5.08.01.03.0 Suitable 3.03.02.00.20.10.30.15to 100

<Example 8> Hand lotion

Raw material name Content (% by weight) Cyclomethiconethylethylhexanoate dimethicone dimethiconecopolyolsilica flavored glycerin 1,3-butylene glycol paraoxybenzoic acid methyl paraoxyansulfonic acid ester carboxyvinyl polymer potassium hydroxide 6.02.06.03.01.0 quantity5.08.00.20.10.30.15to 100

<Example 9> Foundation

Raw material name Content (% by weight) Cyclomethicone dimethicone coco polyol lipophilic treatment titanium dioxide red iron oxide yellow iron oxide polymethyl methacrylate flavoring glycerin1,3-butylene glycol paraoxybenzoic acid methyl paraoxyansonic acid ester carboxyvinyl polymer potassium hydroxide 12.02.54.00.50.50.5suitability3.02.00.20.10.20.1to 100

As can be seen from the above examples and test examples, according to the present invention, while maintaining the durability and water resistance of the water-in-oil type cosmetics as it is, oil-in-oil excellent in stability of low viscosity showing usability corresponding to the feel of the oil-in-water type cosmetics A water droplet cosmetic composition is provided.

Claims (2)

In a water-in-oil cosmetic composition in which a volatile silicone oil and an ester or triglyceride-based polar oil are mixed in an oil phase, 5 to 20% by weight of an oil phase mixed with a lipophilic surfactant, a volatile silicone oil and an ester or triglyceride polar oil; As a water-in-oil type cosmetic consisting of an acrylic organic thickener and its aqueous phase containing 80 to 95% by weight containing a neutralizer and a polyol, The lipophilic surfactant is a silicone-based lipophilic surfactant having an HLB value of 2 to 6, and is blended in an amount of 0.5 to 10.0% by weight; The acrylic organic thickener is at least one selected from the group consisting of carboxyvinyl polymer, acrylate / C _10-30 alkyl acrylate crosslinked polymer, and glyceryl polymethacrylate / propylene glycol crosslinked polymer, In amounts of%; The neutralizing agent is at least one selected from the group consisting of sodium hydroxide, potassium hydroxide, ammonium hydroxide and triethanolamine, and is formulated so that the pH of the composition is 5.0 to 7.5; The polyol is one or more selected from the group consisting of glycerin, propylene glycol, 1,3-butylene glycol, and sorbitol, water-in-oil cosmetic composition, characterized in that it is blended in an amount of 1.0 to 50% by weight. The water-in-oil cosmetic composition according to claim 1, wherein the silicone-based lipophilic surfactant is dimethicone copolyol.