KR101133067B1 - Cosmetic formulation of a W/O/W multiple emulsion containing olive oil by one-step process - Google Patents

Abstract

The present invention relates to a cosmetic composition capable of producing multiple emulsions in the form of W / O / W in an emulsion using olive oil which is safe for skin. In the conventional production of multiple emulsions of W / O / W type, there is a disadvantage in that the preparation time is long and the formulation stability is low. On the contrary, the cosmetic composition of the present invention can obtain a cosmetic composition having excellent formulation stability while having the same manufacturing time as an emulsion of a general O / W form in a single process that overcomes the disadvantages of the conventional manufacturing method.

W / O / W multiple emulsions, single process, olive oil, cosmetics

Description

Cosmetic composition of a single process Ｗ / O / W multiple emulsions using olive oil

1 is a micrograph of one of the emulsions prepared by an embodiment of the present invention.

The present invention relates to a cosmetic composition in which raw materials are mixed to enable a single process production in preparing W / O / W multiple emulsions using olive oil.

In the conventional production of multiple emulsions, a method of preparing and stabilizing a W / O emulsion in a first step is generally followed by dispersing the W / O emulsion in an aqueous phase in a second step to obtain a final emulsion. However, in this case, the manufacturing time is long, the energy loss is large, the manufacturing method is complicated, and the use of many surfactants and raw materials is inevitable compared to simple O / W emulsions, and thus the skin safety is impaired. In addition, the prepared multiple emulsions have limitations in development since it is difficult to obtain a long-term stabilized formulation. The cosmetic composition of the present invention can be produced in a single process to overcome these disadvantages and can be obtained W / O / W multiple emulsion with excellent formulation stability by the use of waxes and thickeners.

Multiple emulsions are emulsions in emulsions in which the dispersed phase particles have smaller dispersed particles. These multiple emulsions have both the moisturizing effect of the W / O emulsion and the refreshing feel of the O / W emulsion, and enable continuous release control of the active ingredient dissolved in the inner water phase, and provide different active ingredients in the inner and outer water phases. While it can be used, it has the advantage that the irritation caused by the active ingredient is alleviated. For this reason, multiple emulsions are widely used in food, cosmetics and medicine.

Multiple emulsions can be produced in a single process or a total of two stages. Existing single processes are prepared by D phase emulsification or PIT (Phase Inversion Temperature) emulsification, but both have limited reproducibility and limited applications. In addition, even in the case of multiple emulsions produced in a total two-step process, large and multi-dispersed particles are thermodynamically unstable, so that the aqueous phase simply diffuses through the oily membrane or the aqueous phase particles move to the external phase due to the collapse of the oily film. It is unstable compared to general emulsions because it strongly indicates the tendency to aggregate, coalesce and cream together. Due to these problems, the production of stable multi-emulsions is limited, and in particular, a single process has a lot of limitations in the application to commercial products that need to be stable in the long term due to lack of systematic research.

Therefore, in order to alleviate this disadvantage, a method of increasing stability by adding a thickener to the external water to prevent aggregation and coalescence between particles is generally used. Korean Patent Application No. 2003-0032699 (Publication No. 2004-100394) uses dimethicone, cetyl octanoate as oil and carbomer as a thickener, and stabilizes W / A at 25 °, 37 ° and 45 ° for 1 month. O / W multiple emulsions were prepared in a single process, and Korean Patent Application No. 2001-0077151 (Publication No. 2003-464863) uses caprylic / caprictri glycerides as oils and is also stable using multiple thickeners. An emulsion was prepared. However, in the multiple emulsions of these patents, when the stability of the W / O particles is low, one large particle is formed by coalescence between the water-in-water particles, resulting in a loss of commodity value and also due to diffusion into the outer water phase. The stability of the emulsion becomes low. In order to prevent this phenomenon, it is necessary to reinforce the oil-water interface membrane by adding an emulsifier, in which case there is a problem that the skin safety is lowered.

In view of the above problems, the present invention is a manufacturing method by a single process that enhances the advantages of the multiple emulsion while overcoming the limitations of the conventional multiple emulsion production method, using olive oil to increase skin stability, wax An object of the present invention is to provide a cosmetic composition which improves stability of an oil phase and improves long-term formulation stability by increasing the viscosity of an external aqueous phase with a thickener.

In order to achieve the above object, the present invention provides a composition capable of producing a W / O / W multiple emulsion in a single process, the emulsifier in the raw material is 0.2 to 5% by weight of polyglyceryl-40 stearate, 0.2 to 5 sorbitan sesquioleate % By weight, glyceryl stearate 0.1-5%, polyglyceryl-30 dipolyhydroxystearate 0.1-2% by weight, 0.1-5% by weight stearic acid purified with fatty acids, 0.5-10% by weight wax, olive oil 1 To 20% by weight, and 0.02 to 5% by weight thickener is provided.

When using less than 0.2% by weight of polyglyceryl-40 stearate and sorbitassesquioleate and less than 0.1% by weight of glyceryl stearate and polyglyceryl-30 dipolyhydroxystearate Insufficient alignment of surfactants at the oil phase or oil phase-out-water interface results in low long-term formulation stability or incomplete or no W / O / W multiple emulsions. Raw materials may be used when at least 5% by weight of polyglyceryl-40 stearate and sorbitan sesquioleate and glyceryl stearate are used and when at least 2% by weight of polyglyceryl-30 dipolyhydroxystearate is used. Precipitates or W / O / W multiple emulsions are not incompletely produced or produced. The use of purified stearic acid at less than 0.1% by weight is not effective in increasing formulation stability, and when used at 5% by weight or more, W / O / W multiple emulsions are not produced or incompletely produced and the long-term formulation stability is also lowered. do. If the wax is used in less than 0.5% by weight does not show the effect of increasing the formulation stability, when used in more than 10% by weight rather lower the formulation stability, using less than 1% or 20% by weight of olive oil In this case, no W / O / W multiple emulsions are produced. If the thickener is used at less than 0.02% by weight, it does not increase and the formulation stability is not enhanced. If the thickener is used at more than 5% by weight, the product value as a cosmetic is low due to stickiness and late absorption.

The wax used in the multiple emulsion composition of the present invention may include one or two or more selected from bees wax, microcrystalline wax, paraffin wax, candelilla wax. ,

Thickeners in the present invention include carbomer, acrylate / C10-30 alkyl acrylate copolymer (Acrylates / C10-30 alkyl acrylate polymer), ammonium acrylol dimethyl taurate / vinylpyrrolidine copolymer ( 1 type selected from ammonium acryloyldimethyltaurate / VP copolymer, hydroxypropyl starch phosphate, tapioca starch, xanthan gum, gellan gum, hydroxyethylcellulose, sodium polyacrylate Or it can mix and use 2 or more types.

The manufacturing process of the multiple emulsion according to the said prescription is as follows. First, the oil phase part composed of an emulsifier combination, fatty acid, wax and oil, etc. and the water phase part including the thickener are dissolved and uniformly mixed at 70-80 degrees, respectively, and then the water phase part is slowly stirred at 15 to 50 rpm with a paddle mixer. After the oil phase is added, the emulsion is emulsified for 3 to 10 minutes at 1000 to 6000 rpm using a homomixer and cooled to obtain a multiple emulsion in the form of W / O / W.

Alternatively, the oil phase portion, which is composed of an aqueous phase, an emulsifier combination, fatty acid, wax, and oil, etc., except for a thickener, is dissolved at 70 to 80 degrees, respectively, and uniformly mixed, and the oil phase is gradually stirred with a paddle mixer 15 to 50 rpm. After the addition, emulsify for about 3 to 10 minutes at 1000 to 6000 rpm with a homomixer and add a thickener, and then mix at about 3 to 10 minutes at 1000 to 6000 rpm with a homomixer, and then cool and multiply in the form of W / O / W. Get an emulsion

Hereinafter, the present invention will be described in more detail based on Examples and Test Examples. However, these Examples and Test Examples are merely to illustrate the invention, the technical scope of the present invention is not limited to these.

Examples and Comparative Examples

It was prepared according to the method described above with the prescription of Table 1, one of the photomicrographs of the emulsion prepared according to the embodiment is shown in Figure 1, the long-term stability was evaluated by the following evaluation method and evaluation criteria.

<Stability Evaluation Method>

Example 3 and Comparative Examples 1 and 2 were stored in a 25 degree, 37 degree and 45 degree incubator for 3 months and observed under a microscope (Table 2).

O: The same state of multiple emulsions as immediately after preparation.

(Triangle | delta): The oily particle which is a state of multiple emulsions or a water-resistant phase can be seen.

X: Not in a multiple emulsion state.

The single-step manufacturing of the multi-emulsion of the W / O / W type according to the present invention significantly reduces the time and cost compared to the conventional manufacturing method by a total of two steps, and improves the long-term stability of the formulation by using waxes and thickeners. By dramatically increasing the barriers to commercial product production and using olive oil, skin safety can be improved and psychological satisfaction can be obtained better than general emulsions. Therefore, the production technology of the multi-emulsion of the W / O / W form by the cosmetic composition of the present invention is expected to provide a breakthrough breakthrough in commercial product production.

Claims (4)

A composition capable of producing W / O / W multiple emulsions in a single process, wherein the emulsifier in the raw material is 0.2 to 5% by weight of polyglyceryl-40 stearate, 0.2 to 5% by weight of sorbitan sesquioleate, and 0.1 to 5% of glyceryl stearate 5% by weight, 0.1-2% by weight of polyglyceryl-30 dipolyhydroxystearate, 0.1-5% by weight of stearic acid purified with fatty acids, 0.5-10% by weight of wax, 1-20% by weight of olive oil, and 0.02 thickener To 5% by weight of W / O / W multiple emulsion composition. The W / O / W type multiple emulsion composition according to claim 1, wherein the wax contains one or two or more selected from beeswax, microcrystalline wax, paraffin wax, and candelilla wax. The thickener of claim 1 wherein the thickener is carbomer, acrylate / C10-30 alkyl acrylate copolymer, ammonium acryloldimethyltaurate / vinylpyrrolidine copolymer, hydroxypropyl starch phosphate, tapioca starch, xanthan gum , Gellan gum, hydroxyethyl cellulose, and sodium polyacrylate, one or two or more of the multiple emulsion composition of the W / O / W characterized by using a mixture. The emulsifier combination according to any one of claims 1 to 3, an oil phase portion composed of fatty acids, waxes and olive oils, and an aqueous phase portion containing a thickener are dissolved at 70 to 80 ° C, respectively, and uniformly mixed, and then the aqueous phase portion is a paddle mixer. (Paddle mixer) After adding the oil phase while stirring slowly at 15 to 50 rpm, emulsifying and cooling at 1000 to 6000 rpm for about 3 to 10 minutes with a homomixer to obtain a multi-emulsion in the form of W / O / W, or The emulsifier combination according to any one of claims 1 to 3 and the oil phase portion consisting of fatty acids, waxes and olive oil and the water phase portion except for the thickener are dissolved at 70 to 80 ° C, respectively, and uniformly mixed, and the water phase portion is a paddle mixer. mixer) After adding the oil phase part slowly stirring at 15 to 50 rpm, emulsifying at about 1000 to 6000 rpm for about 3 to 10 minutes with a homo mixer, and adding a thickener and then about 3 to 1000 to 6000 rpm with a homo mixer. Method of preparing a W / O / W multiple emulsion composition, characterized in that for 10 minutes to mix and then cooled to obtain a multiple emulsion in the form of W / O / W.

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