KR102369493B1 - O/w type emulsion cosmetic composition uniformly stabilizing the viscosity - Google Patents

Abstract

The present invention provides an oil-in-water emulsion cosmetic composition which enables long-term storage by uniformly stabilizing the viscosity of the oil-in-water emulsion cosmetic composition. Accordingly, the oil-in-water emulsion cosmetic composition according to the present invention comprises an aqueous phase, an oil phase, and an emulsifier, wherein the emulsifier comprises potassium cetyl phosphate.

Description

Oil-in-water emulsion cosmetic composition that uniformly stabilizes viscosity

The present invention relates to a cosmetic composition, and more particularly, to an oil-in-water (O/W) emulsion cosmetic composition that uniformly stabilizes the viscosity at room temperature and high temperature.

The skin is divided into three layers of epidermis, dermis, and subcutaneous adipose tissue, and functions to protect against external stimuli and control the evaporation of about 65-70% of the moisture of the human body outside the body. In addition, the epidermis of the skin is divided from the outside into the stratum corneum, granular layer, stratum corneum, and basal layer, among which the stratum corneum of the epidermis contains approximately 10-20% of water and is a thin layer made of sebum from the sebaceous glands and sweat from sweat glands. Because it is surrounded by a natural protective film, it functions to suppress the evaporation of moisture from outside the body and to block the penetration of foreign substances.

However, this stratum corneum easily loses its function due to lifestyle factors such as washing face or bathing, environmental factors such as dry air pollutants, and intrinsic diseases such as atopic skin or senile skin. As it occurs, the skin becomes dry, the surface becomes rough, and the appearance of dullness occurs. Furthermore, the functions of the sebaceous and sweat glands are reduced, and the amount of excreted sebum and sweat is reduced, so that a natural protective film cannot be formed, and the protective power against skin hydration is lost, and the skin becomes more drier. Such a decrease in the moisturizing function of the skin causes a decrease in the elasticity of the skin, and furthermore, it becomes a major factor in skin aging, so a skin moisturizer composition is required. In response to these needs, various moisturizer cosmetics have been researched, developed, and used to maintain proper skin moisture.

Among cosmetic compositions, the emulsifier type uses water as the external phase and oil is dispersed therein (Oil-in-water (O/W) emulsion), and vice versa, has oil as the external phase and water is dispersed in it. There is a Water-in-Oil (W/O) emulsion. The characteristic of O/W emulsifier type is that it has a refreshing and light feeling of use, and is generally used in lotions, creams, essences, and basic formulations. The characteristic of the W/O formulation is that it has a waterproof function that makes-up are not easily removed by sweat or water rather than the O/W formulation, so it is widely used in makeup products and sunscreens.

The O/W formulation contains an oil phase, an aqueous phase, an emulsifier and a powder, and is used to have a viscosity between a lotion and a cream. However, since the trauma is made of water, it is easily smeared after application to the skin, or the film component that enhances the durability is easily erased by water or sweat due to its water solubility, so the durability is poor.

In addition, in the case of O/W formulation, when emulsion stability is not achieved properly, the oil component of the inner box does not achieve stabilization, and the oil component is partially separated from the outside of the outer box and is discharged unevenly together with the formulation. As the purified water evaporates, the oil and powder, which are the inner phases, agglomerate and form significantly higher than the viscosity at room temperature.

Therefore, in the O/W formulation, it is important to uniformly stabilize the viscosity at the same high temperature as at room temperature, but related studies are still insufficient.

Patent Publication No. 10-2020-0119856, Title of Invention: Solid-stabilized oil-in-water type emulsion using particle mixture and method for preparing stabilized oil-in-water type emulsion {SOLID-STABILIZED OIL-IN-WATER TYPE EMULSION USING PARTICLE MIXTURES AND METHOD FOR PRODUCING STABILIZED OIL-IN-WATER TYPE EMULSION}

The present invention is to solve the problems of the prior art, and an object of the present invention is to provide an oil-in-water emulsion cosmetic composition that uniformly stabilizes the viscosity of the oil-in-water emulsion cosmetic composition at both room temperature and high temperature.

The emulsion cosmetic composition according to the present invention includes an aqueous phase, an oil phase, and an emulsifier, and the emulsifier includes potassium cetyl phosphate. In this case, the content of the potassium cetyl phosphate may be 0.3 to 2.0% by weight based on the total weight of the cosmetic composition. As such potassium cetyl phosphate is used as the main emulsifier, the viscosity at room temperature and high temperature is uniformly formed, and the total emulsifier content can be reduced because multiple emulsifiers are not used.

In addition, the emulsion cosmetic composition further comprises cetearyl alcohol and glyceryl stearate as an emulsion stabilizer. Accordingly, the viscosity uniformity and stability at room temperature and high temperature are further improved. In this case, the content of cetearyl alcohol may be 2.0 to 3.5% by weight based on the total weight of the cosmetic composition. Furthermore, the weight % ratio of cetearyl alcohol and glyceryl stearate may be 1.0:0.1.

In addition, the total content of the potassium cetyl phosphate, the cetearyl alcohol, and glyceryl stearate may be 3.0 to 5.0% by weight based on the total weight of the cosmetic composition.

On the other hand, in the emulsion cosmetic composition according to the present invention, the aqueous phase may contain 1 to 3% by weight of butylene glycol, 1.3 to 1.8% by weight of glycerin, and 0.1 to 0.2% by weight of xanthan gum relative to the total weight of the cosmetic composition. In this case, the oil phase preferably contains 17 to 25% by weight of the sunscreen component, 6 to 8% by weight of C12-15 alkylbenzoate, and 3 to 5% by weight of dibutyl adipate, based on the total weight of the cosmetic composition.

In addition, the oil-in-water emulsion cosmetic composition according to the present invention may further include a thickener. The thickener is a mixture of purified water, sodium polyacrylate, dimethicone, cyclopentasiloxane, trideceth-6, and sebum/sebum-18/18 dimethicone, and is 0.5 to 0.5 to the total weight of the cosmetic composition. 1.5% by weight. Furthermore, the oil-in-water emulsion cosmetic composition according to the present invention may further include a pH adjusting agent.

In addition, the viscosity of the oil-in-water emulsion cosmetic composition can be maintained at 15,000 to 35,000 cps at room temperature and high temperature.

In addition, the formulation of the oil-in-water emulsion cosmetic composition may be provided as a product formed in at least one of liquid to viscous lotion, emulsion, and cream.

The oil-in-water emulsion cosmetic composition according to the present invention contains appropriate amounts of potassium cetylphosphate, cetearyl alcohol and glyceryl stearate as emulsifiers to uniformly stabilize the viscosity of the oil-in-water emulsion cosmetic composition at low and high temperatures, and to stabilize the oil-in-water emulsion cosmetic The formulation stability of the composition is maintained continuously.

1 is a graph showing the viscosity change at 25 ℃ according to the Examples and Comparative Examples of the present invention.
2 is a graph showing the change in viscosity at 45° C. according to Examples and Comparative Examples of the present invention.
3 and 4 are photographs of cosmetic compositions according to Comparative Example 1 and Examples immediately after taking out from 25° C., respectively.
5 and 6 are photographs of cosmetic compositions according to Comparative Example 1 and Examples immediately after taking out from 45° C., respectively.

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement them. Since the present invention can have various modifications and can have various embodiments, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Hereinafter, an oil-in-water emulsion cosmetic composition according to the present invention will be described. The oil-in-water emulsion cosmetic composition according to the present invention is an oil-in-water formulation, and is characterized in that it exhibits viscosity stability like a water-in-oil formulation while maintaining a light and moist feeling of use. Accordingly, the oil-in-water emulsion cosmetic composition according to the present invention includes an aqueous phase, an oil phase, and an emulsifier, and the greatest feature is that it contains potassium cetyl phosphate as an emulsifier.

Potassium cetyl phosphate has the empirical formula C16H34O4PK and the following structural formula.

Potassium cetyl phosphate is a potassium salt component of a complex mixture of esters of phosphoric acid and cetyl alcohol, and is responsible for dispersing and emulsifying immiscible components by adsorbing to the interface of cosmetic components to reduce surface tension. In addition, potassium cetyl phosphate according to the present invention is combined with the emulsion stabilizer according to the present invention to uniformly stabilize the viscosity of the cosmetic composition.

At this time, the content of potassium cetyl phosphate is formed in an amount of 0.3 to 2.5% by weight based on the total weight of the cosmetic composition. At this time, when the content of potassium cetyl phosphate is less than 0.3% by weight, the content of the emulsifier is relatively small compared to the oil content, and as time goes by, the aqueous phase and the oil phase are separated at room temperature and high temperature, and the content exceeds 2.5% by weight. In the case of emulsion, the appearance is a high-viscosity cream shape immediately after making the emulsion, and as time passes, the viscosity at high temperature rises rapidly. This is because the appearance of the cosmetic composition was different, and the surface of the cosmetic composition became matte, resulting in a change to the extent of feeling uncomfortable when discharged from the tube container. Furthermore, even in the case of formulations other than the present invention, there is room for improvement in stability even if only 0.5% of potassium cetyl phosphate is additionally added to the formulation in which several emulsifiers are used. A possible beneficial effect is derived.

Furthermore, the cosmetic composition according to the present invention is characterized in that cetearyl alcohol and glyceryl stearate are used as emulsion stabilizers. Cetearyl alcohol is an aliphatic alcohol in which cetyl alcohol and stearyl alcohol are mixed. It helps to emulsify potassium cetyl phosphate and maintains the same physical properties at room temperature and high temperature. In addition, cetearyl alcohol removes stickiness symptoms, applies it to the skin with a smooth feeling, and helps to produce a radiant skin.

Glyceryl stearate is a mixture of two components, glycerin and stearic acid, and is a mild, mild natural ingredient derived from coconut and soybean oil. Like cetearyl alcohol, glyceryl stearate is used as an emulsifier that improves the stability of the product by reducing the surface tension of the emulsified substance while managing the smooth skin texture that gives elasticity and shine to the skin.

At this time, it is preferable that the content of cetearyl alcohol contains 2.0 to 3.5% by weight relative to the total content of the oil-in-water emulsion cosmetic composition according to the present invention.

If the content of cetearyl alcohol is less than 2.0, the viscosity is low, making it difficult to use in tube containers, etc., and depending on the formulation, when the content of oil is high, the degree of separation of the formulation is severe due to insufficient emulsification power, and the content is high. If it exceeds 3.5 wt %, the viscosity is rapidly increased and the appearance is matte.

Furthermore, when the content of cetearyl alcohol is increased alone, the emulsion cosmetic composition of the present invention has a limit in increasing the viscosity, so the weight% ratio of potassium cetyl phosphate and cetearyl alcohol is preferably 1:1.5 to 1:2.5 Do. More preferably, when the weight % ratio of potassium cetyl phosphate and cetearyl alcohol was 1:2, it was confirmed that the viscosity was best captured.

However, in this case, when the content of glyceryl stearate exceeds 2.5% by weight, the component of stearic acid of glyceryl stearate increases, thereby clogging pores and causing trouble. Furthermore, in the formulation, it is preferable to use the weight % of cetearyl alcohol and glyceryl stearate as an auxiliary emulsifier in a ratio of 1.0:0.1.

Furthermore, when the content ratio of potassium cetyl phosphate, cetearyl alcohol, and glyceryl stearate is 1.0: 2.0: 0.2, emulsification and stability can be optimally maintained without other auxiliary emulsifiers.

In addition, in the oil-in-water emulsion cosmetic composition according to the present invention, it is important to appropriately control the total content of potassium cetyl phosphate, cetearyl alcohol, and glyceryl stearate for uniform viscosity stabilization.

In this case, the total content of potassium cetyl phosphate, cetearyl alcohol, and glyceryl stearate is preferably 3.0 to 5.0% by weight based on the total weight of the cosmetic composition. Furthermore, the content (wt%) ratio is more preferably 1.0: 2.0: 0.2.

When their total content is less than 3.0% by weight, the content of the emulsifier is relatively small compared to the oil content, so the aqueous and oil phases do not mix properly and the emulsion is not formed, resulting in a low viscosity. If the content exceeds 5.0% by weight, the amount of purified water must be sufficient so that potassium cetyl phosphate can be uniformly dissolved. In addition, as the total content of the emulsifier increases, stirring is not performed well during emulsification, and as the viscosity increases at a high temperature over time, there is a problem in that it is difficult to maintain a uniform property during discharge.

Furthermore, the aqueous phase of the oil-in-water emulsion cosmetic composition according to the present invention contains 1 to 3% by weight of butylene glycol, 1.3 to 1.8% by weight of glycerin, and 0.1 to 0.2% by weight of xanthan gum.

Butylene glycol and glycerin are representative moisturizers used in cosmetics, helping to make the skin smooth and moist by creating a skin moisturizing film. The use of a small amount of polyol such as butylene glycol and glycerin lowers the freezing point of the formulation and improves the stability at low temperatures. After applying sunscreen on the skin, the color base makeup is sometimes pushed away. Therefore, in the present invention, the total content of the polyol was used in the range of 2.3 to 4.8 wt%.

Xanthan gum is a natural thickener extracted from sugar cane, in powder form, and is a thickener that can increase adhesion and viscosity in cosmetic formulations, prevent oil separation, or improve the spreadability of the skin. If xanthan gum is prescribed at 0.05 wt% or less, the contribution to stability improvement may be insignificant due to insignificant increase in the feeling of use and viscosity. use.

In addition, the oily phase of the oil-in-water emulsion cosmetic composition according to the present invention contains 17 to 25% by weight of a sunscreen component, 6 to 8% by weight of C12-15 alkylbenzoate, and 3 to 5% by weight of dibutyl adipate.

For sunscreen ingredients, 4-methylbenzylidene camphor, benzophenone-3, bis-ethylhexyloxyphenol methoxyphenyltriazine, diethylaminohydroxybenzoylhexylbenzoate, and ethylhexyltriazone are used. In order to uniformly dissolve the sunscreen material and prevent it from precipitating, a solvent with good compatibility with the sunscreen material must be added.

In order to homogenize the stability of the formulation, C12-15 alkylbenzoate and dibutyl adipate were added to the oil-in-water emulsion cosmetic composition according to the present invention. If you use a large amount of the ingredient, an oily and sticky feeling occurs despite the O/W formulation. If you use a small amount of the ingredient, the powdery sunscreen ingredient may appear temporarily dissolved, but As time passes, the UV-blocking component may precipitate at low temperatures or in places with severe temperature changes, which may break the stability of the formulation.

In the case of dimethicone, it is a type of silicone oil and is used as a raw material that gives lubricity, slippage, and good feeling of use. Instead, it is preferable to add C12-15 alkyl benzoate and dibutyl adipate, which are compatible with the sunscreen material. Meanwhile, in the present invention, as an emulsifier that does not contain wax, polyethylene may not be used as an oil component in order to uniformly stabilize the viscosity.

Furthermore, the oil-in-water emulsion cosmetic composition according to the present invention may further include a pH adjusting agent. pH is a measure to distinguish the hydrogen ion concentration. Acidic pH is 1.0 to 6.0, neutral pH is 7.0, and basic pH is 8.0 to 14.0, and the most ideal pH for skin is 5.0 to 6.0. Germs such as bacteria and bacteria cannot survive in the skin's weakly acidic environment because they are alkaline. At this time, the skin barrier is weakened and the closer it is to basicity, the easier it is for bacteria to multiply, resulting in pimples, acne, and troubles.

At this time, the present invention can adjust the overall product pH with the content of the pH adjuster using at least one raw material selected from triethanolamine, arginine, tromethamine, sodium hydroxide, and potassium hydroxide as an alkaline pH adjuster. The emulsion of the O/W formulation maintains the pH at a pH of 3.0 to 9.0, preferably 4.0 to 8.0, and more preferably 5.0 to 8.0, so that in the case of potassium cetyl phosphate, a pH adjuster is not used in the product without a separate use of pH 5.0 to 8.0 The most uniform viscosity is maintained at When a raw material that requires a pH adjuster such as carbomer or acid is added to the formulation or the pH of the product drops to 5.0 or less due to acidity, one of the pH adjusters listed above is used to adjust the final pH of the formulation to 5.0 to 8.0.

On the other hand, the oil-in-water emulsion cosmetic composition according to the present invention may further include a thickener. In this case, the thickener is preferably composed of a mixture of purified water, sodium polyacrylate, dimethicone, cyclopentasiloxane, trideceth-6, and PEG/Sebum-18/18 dimethicone.

In this case, the thickener preferably contains 0.5 to 1.5% by weight based on the total weight of the cosmetic composition. If the ?t amount of the thickener is less than 0.5, the emulsion stabilization becomes unstable and the formulation is separated. There is a problem in that an oily and sticky feeling of use appears rather than a refreshing feeling of use.

Accordingly, the oil-in-water emulsion cosmetic composition according to the present invention reduces the difference in viscosity at room temperature and high temperature according to the stabilization of potassium cetyl phosphate, cetearyl alcohol, and glyceryl stearate so that the viscosity is uniformly stabilized for a long period of time. and maintaining the viscosity at high temperature from 15,000 to 35,000 cps.

Meanwhile, the formulation of the oil-in-water emulsion cosmetic composition according to the present invention may be provided as a product formed in at least one of liquid to viscous lotion, emulsion, and cream.

Hereinafter, an experimental example of the present invention will be described.

Preparation of oil-in-water emulsion cosmetic composition

According to the Examples and Comparative Examples of the present invention in the following way, an oil-in-water emulsion cosmetic composition having a uniform viscosity was prepared, and the raw materials and contents of the prepared composition are shown in [Table 1].

(1) First, the aqueous phase was heated to dissolve and mix the water-soluble components.

(2) While maintaining the water phase temperature above 80℃, while operating the Homo mixer at a low speed of 1000rpm, the potassium cetylphosphate is slowly divided and stirred evenly until the raw material is completely dispersed and invisible. At this time, if the homo rpm is operated at a high speed, it is impossible to check whether the potassium cetyl phosphate is completely dissolved due to foaming, so it proceeds at a low speed rpm.

(3) After heating sufficiently to 80℃~85℃ enough to completely dissolve the oil phase component, the emulsification operation was carried out while slowly pouring it into the aqueous phase. At this time, the emulsification operating temperature was set to 75 ℃ or higher. At this time, the homo rpm is gradually increased to 2500 rpm, and the first emulsification is uniformly performed for about 10 minutes.

(4) After the emulsification operation, the second emulsification operation was carried out at 3000 rpm for about 5 minutes while slowly adding the thickener.

(5) A powder phase was added and further homogenization was performed at 3000 rpm for about 3 minutes.

(6) After the temperature is cooled to 60°C, a preservative and fragrance are added and stirred.

division Raw material name comparative example
One comparative example
2-1 Example comparative example
2-2 comparative example
2-3 Awards
ingredient Purified water To 100 To 100 To 100 To 100 To 100 Butylene Glycol 2.00 2.00 2.00 2.00 2.00 glycerin 1.50 1.50 1.50 1.50 1.50 Disodium EDIT 0.05 0.05 0.05 0.05 0.05 xanthan gum 0.15 0.15 0.15 0.15 0.15 main
emulsifier Potassium Cetyl Phosphate - 0.30 1.50 2.70 3.50
emulsifier Polysorbate 60 1.50 - - - - Glyceryl Stearate (and)
PEG-100 Stearate 1.00 - - - - Sorbitan Stearate 1.80 - - - - cetearyl alcohol 2.00 0.60 3.00 5.40 7.00 Glyceryl Stearate - 0.06 0.3 0.54 0.7 paid
ingredient polyethylene 0.30 - - - - UV protection ingredient 21.00 21.00 21.00 21.00 21.00 dimethicone 10.00 - - - - C12-15 Alkylbenzoate - 6.00 6.00 6.00 6.00 dibutyl adipate - 4.00 4.00 4.00 4.00 thickener Purified water (and)
Sodium polyacrylate (and)
dimethicone (and)
Cyclopentasiloxane (and)
Trideceth-6(and)PG/PG-18/18 dimethicone 1.00 1.00 1.00 1.00 1.00 powder polymethylsilsesquioxane 1.00 1.00 1.00 1.00 1.00 antiseptic antiseptic 1.00 1.00 1.00 1.00 1.00 air freshener Spices appropriate amount appropriate amount appropriate amount appropriate amount appropriate amount

Comparative Example 1 is a basic water-in-water type sunscreen formulation. The emulsifier of Comparative Example 1 is cetearyl alcohol, polysorbate 60, glyceryl stearate (and) PEG-100 stearate, sorbitan stearate and polyethylene, which is a wax. was used.

In Comparative Examples 2-1 to 2-2, Examples, and Comparative Examples 2-3 to 2-4, emulsifiers were used as cetearyl alcohol and potassium cetyl phosphate, and the content of potassium cetyl phosphate was 0.3%, 1.5%, The amount was increased to 2.7% and 3.5%, and cetearyl alcohol was added to 0.6% to 7.0% together with the increasing content of potassium cetyl phosphate, and the properties and physical properties were observed.

Viscosity change experiment

go. After preparing the cosmetics of Comparative Examples 1 and 2-1 to 2-3 and Example 1 and checking 25°C with a thermometer, the same-day and next-day viscosity and subsequent measurements are measured after storing 25°C in a thermostat. . DV2T (Brookfield Viscometer DV2T) was used as the viscometer, and the viscosity of the cosmetic was measured at the same pin and rpm and for 1 minute, which is shown in FIGS. 1 and 2 .

me. 45°C was measured from the first week, and the high-temperature physical properties were stored in a 25°C thermostat for 6 hours so that the physical properties could be sufficiently recovered.

At this time, as in FIGS. 1 and 2, only the viscosity of the Examples is kept constant, and when the content of potassium cetyl phosphate is absent or low, the viscosity decreases or when the content of potassium cetyl phosphate is high, it was found that the viscosity gradually increases. .

25℃ day
Viscosity next day
Viscosity 1Week 2Week 1 Month 2Month 3Month Comparative Example 1 17,330 20,670 23,250 25,920 23,580 21,580 24,170 Comparative Example 2-1 11,050 12,170 10,980 9,967 6,716
Formulation separation 4,777
Formulation separation 4,313
Formulation separation Example 26,920 25,750 26,670 28,250 27,000 26,080 28,170 comparative example
2-2 42,750 43,060 44,590 46,650 45,750 47,310 48,900 comparative example
2-3 59,350 60,920 61,790 63,560 64,150 64,550 66,550

45℃ day
Viscosity next day
Viscosity 1Week 2Week 1 Month 2Month 3Month Comparative Example 1 - - 12,580 11,080 10,060 8,917 6,619 comparative example
2-1 - - 8,897 6,747
Formulation separation 4,716
Formulation separation 3,777
Formulation separation 2,313
Formulation separation Example - - 28,000 29,580 29,650 29,920 30,020 comparative example
2-2 - - 49,470 51,500 54,850 56,333 59,670 comparative example
2-3 - - 63,177 64,350 65,790 67,580 70,680

Long-term storage stability

In order to observe the long-term storage stability of each of the formulations prepared in Examples to Comparative Example 1 and Comparative Examples 2-1 to 2-3, room temperature, 4 ℃, 45 ℃, cycling 3 times (Cycling ~ 72 hours -10 ℃, 48 Time 25 ℃, 48 hours 45 ℃) into each formulation was put in a thermostat, the stability for 3 months was observed, and it is shown in [Table 4] below.

division Comparative Example 1 Comparative Example 2-1 Example Comparative Example 2-2 Comparative Example 2-3 room temperature ◎ X ◎ △ △ 4℃ ○ △ ◎ ○ △ 45℃ X X ○ X X cycling ○ X ◎ ○ △

◎: Very stable, ○: Stable, △: Normal, X: Separation or abnormal properties

At this time, FIGS. 3 and 4 are photographs of Comparative Example 1 and Example immediately after taking out from 25° C., respectively, and FIGS. 5 and 6 are photographs of Comparative Example 1 and Example immediately after taking out from 45° C., respectively.

As shown, there is a difference in the viscosity values of Comparative Example 1 and Example immediately after taking out from 25 ° C in FIGS. .

Immediately after taking out from 45° C. in FIGS. 5 and 6, in Comparative Example 1 of FIG. 5, the viscosity was lowered, resulting in fluidity of a flowable mucus phase, and recovered when placed at room temperature, but when about 3 months had passed, the emulsion was separation could be confirmed. In the case of Examples, the viscosity and properties similar to those of 25 °C were maintained even after 3 months had elapsed.

Experiment result

In Comparative Example 1, when the viscosity and properties of 25 degrees and 45 degrees were observed at intervals of 1 week, 2 weeks, 1 month, 2 months, and 3 months, it was confirmed that the properties immediately after the experiment were the viscosity between the lotion and the cream. . When the formulation was stored in a high temperature 45°C incubator, it was found that the viscosity decreased like a liquid within 72 hours. When the formulation was stored again at 25°C, the consistency between the lotion and the cream returned to the original properties.

However, as time passed, the viscosity did not recover as much as the original physical properties, and it was confirmed that it gradually decreased. As the viscosity decreased, the stability became unstable, and eventually, the properties of the formulation were separated after about 3 months.

In order to improve the unstable physical properties of the formulation at high temperature, an improvement experiment was conducted by adding potassium cetyl phosphate, cetearyl alcohol, and glyceryl stearate.

In the case of Comparative Example 2-1, 0.3% by weight of potassium cetyl phosphate, 0.6% by weight of cetearyl alcohol, and 0.06% by weight of glyceryl stearate were prescribed compared to the oil content, and the total emulsifier content was small, so it was separated without emulsification.

In the case of the example, the most similar physical properties to those of the comparative example were obtained, and it was confirmed that the uniform viscosity physical property with the smallest deviation at 25°C and 45°C was exhibited when the 3-month stability was observed. It was confirmed that it applied more gently on the

In the case of Comparative Example 2-2, when 2.5 wt% of potassium cetyl phosphate, 5.0 wt% of cetearyl alcohol, and 0.5 wt% of glyceryl stearate were added, it was confirmed that the viscosity was higher than that of Example, and at 45 °C From the first week, it was found that the viscosity was higher than 25 °C. The difference was insignificant at the first week, but gradually increased when observed for a month or two. From the second month on, when the appearance was observed with the naked eye, the viscosity increased and the surface was changed to a matte appearance. In the case of conventional sunscreen, a lot of it is used in a tube container, but there was a change in the degree of discomfort to the extent that it was discharged.

In Comparative Example 2-3, when a content of 3.5 wt% of potassium cetyl phosphate, 7.0 wt% of cetearyl alcohol, and 0.7 wt% of glyceryl stearate was prescribed, potassium cetyl was added to purified water at a high temperature of 80 to 90 °C. The dissolution of the phosphate must be carried out, but since the content is as high as 3.5% by weight, it took a long time for the experiment to dissolve sufficiently. Although the experiment was completed in Comparative Example 2-3, the appearance was so high that the viscosity could be felt from the appearance, and when the stability was continuously observed, the surface gradually began to change as if the surface was matte when observing the appearance properties from the first month, Comparative Example 2 It was found that the trend of -2 accelerated more rapidly.

In light of the experimental results, in the case of using potassium cetyl phosphate at 0.3 wt% or less, cetearyl alcohol at 1.5 wt% or less, and glyceryl stearate at 0.1 wt% or less, the total emulsifier content during manufacturing is insufficient, and the emulsion formation is unstable. Separation was found, and when more than 2.5 wt% of potassium cetyl phosphate and 5.0 wt% or more of cetearyl alcohol were prescribed, a phenomenon was found that the physical properties at 25°C and 45°C were different as time passed. When properly used in the formulation of weight % to 2.0 weight % and cetearyl alcohol 1.0 to 3.5 weight %, various formulations from thin to creamy can be implemented, and a sunscreen with stable and uniform physical properties at each temperature can be manufactured. .

As described above, preferred embodiments of the present invention have been disclosed in the present specification and drawings, and although specific terms are used, these are only used in a general sense to easily explain the technical content of the present invention and to help the understanding of the present invention. , it is not intended to limit the scope of the present invention. It will be apparent to those of ordinary skill in the art to which the present invention pertains that other modifications based on the technical spirit of the present invention can be implemented in addition to the embodiments disclosed herein.

Claims (13)

Awards;
paid;
emulsifiers;
emulsion stabilizer; and
sunscreen ingredients;
including,
The emulsifier includes potassium cetyl phosphate,
The emulsion stabilizer includes cetearyl alcohol and glyceryl stearate,
The total content of the potassium cetyl phosphate, the cetearyl alcohol, and glyceryl stearate is 3.0 to 5.0% by weight based on the total weight of the cosmetic composition,
The content of potassium cetyl phosphate is 1.5 to 2.0% by weight based on the total weight of the cosmetic composition,
The sunscreen component contains 20% by weight or more based on the total weight of the cosmetic composition,
The oil-in-water emulsion cosmetic composition, characterized in that the viscosity of the oil-in-water emulsion cosmetic composition is maintained at 15,000 to 35,000 cps.
delete delete According to claim 1,
The content of the cetearyl alcohol is an oil-in-water emulsion cosmetic composition, characterized in that 2.0 to 3.5% by weight relative to the total weight of the cosmetic composition.
5. The method of claim 4,
The oil-in-water emulsion cosmetic composition, characterized in that the weight% ratio of cetearyl alcohol and glyceryl stearate is 1.0:0.1.
delete According to claim 1,
The aqueous phase is an oil-in-water emulsion cosmetic composition, characterized in that it contains 1 to 3% by weight of butylene glycol, 1.3 to 1.8% by weight of glycerin, and 0.1 to 0.2% by weight of xanthan gum relative to the total weight of the cosmetic composition.
According to claim 1,
The oil phase is an oil-in-water emulsion cosmetic, characterized in that it contains 17 to 25% by weight of a sunscreen component, 6 to 8% by weight of C12-15 alkylbenzoate, and 3 to 5% by weight of dibutyl adipate, based on the total weight of the cosmetic composition composition.
According to claim 1,
The oil-in-water emulsion cosmetic composition is an oil-in-water emulsion cosmetic composition, characterized in that it further comprises a thickener.
10. The method of claim 9,
The thickener is a mixture of purified water, sodium polyacrylate, dimethicone, cyclopentasiloxane, trideceth-6, and PEG/Sebum-18/18 dimethicone, and 0.5 based on the total weight of the cosmetic composition To 1.5 wt% oil-in-water emulsion cosmetic composition, characterized in that it contains.
According to claim 1,
The oil-in-water emulsion cosmetic composition has a pH of 5.0 to 8.0.
delete According to claim 1,
The formulation of the oil-in-water emulsion cosmetic composition is an oil-in-water emulsion cosmetic composition, characterized in that it can be provided as a product formed in at least one of a liquid to viscous lotion, emulsion, and cream.

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