KR102464015B1 - Sun screening cometic composition comprising a polyglyceryl-based emulsifier and a sorbitan-based emulsifier - Google Patents

Abstract

It relates to a cosmetic composition for UV protection, comprising an oil, an emulsifier, an inorganic sunscreen and an aqueous phase, and wherein the emulsifier includes a polyglyceryl-based emulsifier and a sorbitan-based emulsifier, wherein the UV-blocking effect is excellent, and the skin No irritation, excellent formulation stability.

Description

Cosmetic composition for UV protection comprising a polyglyceryl-based emulsifier and a sorbitan-based emulsifier {SUN SCREENING COMETIC COMPOSITION COMPRISING A POLYGLYCERYL-BASED EMULSIFIER AND A SORBITAN-BASED EMULSIFIER}

The present specification includes an oil, an emulsifier, an inorganic sunscreen and an aqueous phase, and the emulsifier includes a polyglyceryl-based emulsifier and a sorbitan-based emulsifier, a cosmetic composition for UV protection is disclosed.

Recently, as concerns about the safety of chemicals in various industries such as food and sanitary products are increasing, many efforts are being made to exclude ingredients that may threaten skin or human health in cosmetics.

In particular, in the case of sunscreens for adult customers with sensitive skin, infants and children, concerns about skin irritation of organic sunscreens, we have developed a number of water-in-oil type sunscreen cosmetics containing only inorganic sunscreens. In order to improve the dispersibility of the barrier component and secure the emulsion stability, many emulsifiers with PEG groups (PEG-based emulsifiers) with excellent emulsification and dispersibility were used.

However, as a safety issue occurred, a product excluding the PEG-based emulsifier was developed, but negative feeling of use such as tight application or cloudiness was dominant, formulation stability was remarkably reduced, and the oil included to secure the stability of the formulation Alternatively, there was a disadvantage in that the wax for the purpose of thickening is precipitated.

Therefore, there is a need for research on a cosmetic composition that has improved usability and formulation stability compared to the prior art while excluding PEG-based emulsifiers.

Korean Patent Publication No. 10-2017-0003295

In one aspect, an object of the present invention is to provide a cosmetic composition having excellent usability and excellent formulation stability without including a PEG-based emulsifier, including a polyglyceryl-based emulsifier and a sorbitan-based emulsifier.

In another aspect, it is an object of the present invention to provide a cosmetic composition containing an inorganic sunscreen, which has no irritation to the skin and has an excellent sunscreen effect.

In one aspect, the present invention provides a cosmetic composition for sunscreen, comprising an oil, an emulsifier, an inorganic sunscreen and an aqueous phase, and the emulsifier includes a polyglyceryl-based emulsifier and a sorbitan-based emulsifier.

In one aspect, the cosmetic composition for sunscreen of the present invention, including a polyglyceryl-based emulsifier and a sorbitan-based emulsifier, has excellent usability and excellent formulation stability without including a PEG-based emulsifier. In addition, since it contains an inorganic sunscreen as a sunscreen, it has excellent sunscreen effect without irritation to the skin.

1a and 1b are photographs showing the precipitation stability of cosmetic compositions according to Example 1 and Comparative Example 1 of the present invention.
2a and 2b are photographs showing formulation stability of cosmetic compositions according to Example 1 and Comparative Example 6 of the present invention.

Term Definition

In the present specification, when a part "includes" a certain component, this means that other components may be further included rather than excluding other components unless otherwise stated.

exemplary of embodiments Explanation

Hereinafter, the present invention will be described in detail.

In exemplary embodiments of the present invention, the present invention includes an oil, an emulsifier, an inorganic sunscreen and an aqueous phase, and the emulsifier includes a polyglyceryl-based emulsifier and a sorbitan-based emulsifier. .

In general, unlike inorganic sunscreens that physically prevent ultraviolet rays from penetrating into the skin by scattering and reflecting them, organic sunscreens prevent ultraviolet rays from penetrating into the skin by chemical absorption.

Therefore, the cosmetic composition of the present invention contains inorganic sunscreens instead of organic sunscreens that may cause irritation or toxicity to the skin by chemical action, so it can be safely used on the skin of infants, sensitive skin, and skin after dermatological procedures. made it possible

However, when the inorganic sunscreen is included, there is a problem in formulation stability such as a stiff feeling of use or oil or wax precipitation during the manufacturing process. Therefore, there have been concerns about the case that components such as 1,4-dioxane produced as a dispersion in the synthesis process are not properly removed.

Therefore, the present inventors include an inorganic sunscreen without irritation to the skin, without using a conventionally used PEG-based emulsifier, and include a polyglyceryl-based emulsifier and a sorbitan-based emulsifier together with excellent formulation stability, while protecting against UV rays A cosmetic composition for blocking UV rays with excellent effects was invented.

In one embodiment, the polyglyceryl-based emulsifier is polyglyceryl-2dipolyhydroxystearate, laurylpolyglyceryl-3polydimethylsiloxyethyldimethicone, diisostearoyl polyglyceryl-3 Dimer dilinoleate, polyglyceryl-4 diisostearate/holyhydroxystearate/sebacate, polyglyceryl-2triisostearate, polyglyceryl-3diisostearate, polyglyceryl-2di It may include at least one selected from the group consisting of isostearate and polyglyceryl-3 polydimethylsiloxyethyldimethicone.

The sorbitan-based emulsifier consists of sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan tristearate, sorbitan monooleate, sorbitan sesquioleate and sorbitan isostearate. It may be one or more selected from the group, preferably sorbitan isostearate.

In particular, the polyglyceryl-based emulsifier has a bulky structure, while the sorbitan-based emulsifier has a linear structure, so one or more polyglyceryl-based emulsifiers having different structures and one or more sorbitan-based emulsifiers having a linear structure In the case of including, it is possible to prepare a cosmetic composition having excellent formulation stability and excellent dispersibility at high temperatures.

In one embodiment, the content of the total emulsifier may be 1 to 20% by weight based on the total weight of the cosmetic composition, for example, 2 to 19% by weight, 3 to 18% by weight, 4 to 17% by weight, 5 to 16% by weight, 6 to 15% by weight, 7 to 14% by weight or 8 to 13% by weight. When the content of the emulsifier is less than 1% by weight, it is difficult to secure the stability of the formulation such as precipitation of waxes or separation of water over time after the preparation of the cosmetic composition. may be difficult to apply.

In one embodiment, the oil is C12-15 alkyl benzoate, coco-caprylate/caprate, dicapryl ether, cocoglyceride, methyl trimethicone, butylene glycol dicaprylate/dicaprate and capryl It may include one or more selected from the group consisting of ric/capric triglycerides, and the content of the oil may be 10 to 40% by weight based on the total weight of the cosmetic composition, for example, 11 to 35% by weight, 12 to 30% by weight, or 13 to 25% by weight. If the content of the oil is less than 10% by weight, a stiff feeling may be realized, and if the content of the oil is more than 40% by weight, shine may appear when the skin is applied.

In one embodiment, the inorganic sunscreen agent may be at least one selected from the group consisting of titanium dioxide, zinc oxide and iron oxide, and the content of the inorganic sunscreen agent may be 10 to 40% by weight based on the total weight of the cosmetic composition. , for example, 11 to 35% by weight, 12 to 30% by weight, or 13 to 25% by weight. If the content of the inorganic sunscreen is less than 10% by weight, the sunscreen effect may be insignificant, and if it is more than 40% by weight, the feeling of use and formulation safety may be deteriorated.

In one embodiment, the aqueous phase part may include one or more selected from the group consisting of water, hydrogen chloride, butylene glycol, ethylhexyl glycerin, and glyceryl caprylate, and the content of the aqueous phase part is the total weight of the cosmetic composition. It may be 20 to 50% by weight, for example, 23 to 47% by weight, 26 to 44% by weight, or 30 to 40% by weight. If the content of the aqueous phase is less than 20% by weight, oily feeling and sticky feeling may be felt, dispersibility may be reduced, and if it is more than 50% by weight, separation of the oil phase and the aqueous phase may occur.

In one embodiment, the cosmetic composition may further include one or more of a powder, a wax, and an inorganic thickener.

In one embodiment, the powder is for the feeling of use of the cosmetic composition for UV protection, from the group consisting of silica, vinyl dimethicone/methicone silsesquioxane crosspolymer, polymethylsilsesquioxane and polymethylmethacrylate It may be one or more selected. The content of the powder may be 1 to 10% by weight based on the total weight of the cosmetic composition, for example, 1.5 to 9% by weight, 2 to 8% by weight, 2.5 to 7% by weight or 3 to 6.5% by weight. . The powder can prevent precipitation in the formulation while softening the feeling of use of the cosmetic composition within the above content.

In one embodiment, the wax may be one or more selected from hydrogenated vegetable oil and trihydroxystearin, and the content of the wax may be 0.5 to 5% by weight based on the total weight of the cosmetic composition, for example, 1 to 4.5 wt%, 1.5 to 4 wt% or 2 to 3.5 wt%. The wax can prevent precipitation in the formulation while softening the feeling of use within the above content.

In one embodiment, the inorganic thickener may be a hectorite-based inorganic thickener, preferably disteardimonium hectorite, and the content of the inorganic thickener is 0.5 to 5 based on the total weight of the cosmetic composition % by weight, such as 1 to 4.5% by weight, 1.5 to 4% by weight or 2 to 3.5% by weight. The inorganic thickener may prevent wax precipitation within the above content, and may not interfere with the feeling of use.

In one embodiment, the cosmetic composition for sunscreen may be a water-in-oil type. Therefore, the aqueous component in the cosmetic composition for sunscreen does not evaporate and has good affinity with the skin.

Hereinafter, the present invention will be described in more detail through the following examples. However, the following examples are provided only for the purpose of illustration to help the understanding of the present invention, and the scope and scope of the present invention are not limited thereto.

Example - For UV protection cosmetics composition preparation

The cosmetic compositions of Examples 1 to 5 and Comparative Examples 1 to 8 were prepared according to the formulations of Tables 1 and 2 below.

Raw material name comparative example
One Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Example 1 oil C12-15 Alkyl Benzoate - To 100 To 100 To 100 To 100 To 100 To 100 Coco-Caprylate/Caprate To 100 5.00 5.00 5.00 5.00 5.00 5.00 Dicaprylyl Ether 5.00 5.00 5.00 5.00 5.00 5.00 5.00 Cocoglycerides 3.00 - - - - - - Methyl Trimethicone - 3.00 3.00 3.00 3.00 3.00 3.00 BUTYLENE GLYCOL DICAPRYLATE/DICAPRATE - 3.00 3.00 3.00 3.00 3.00 3.00 Caprylic/Capric Triglycerides* 13 12 12 12 12 12 12 water-in-oil type
emulsifier Polyglyceryl-2 Dipolyhydroxystearate 2.00 2.00 2.50 3.50 2.00 - 1.00 Lauryl polyglyceryl-3 Polydimethylsiloxyethyl Dimethicone - 1.00 2.50 3.50 - - 1.00 SORBITAN IOSTEARATE - - - - - 1.00 1.00 DIISOSTEAROYL POLYGLYCERYL-3 DIMER DILINOLEATE - - - - 5.00 5.00 5.00 POLYGLYCERYL-4 DIISOSTEARATE/POLYHYDROXYSTEARATE/SEBACATE - - - - - 1.00 1.00 sunscreen Titanium Dioxide 7.2 5.7 5.7 5.7 5.7 5.7 5.7 Zinc Oxide 10.2 7.8 7.8 7.8 7.8 7.8 7.8 powder SILICA 2.00 2.00 2.00 2.00 2.00 2.00 2.00 VINYL DIMETHICONE/METHICONE SILSESQUIOXANE CROSSPOLYMER - 2.00 2.00 2.00 2.00 2.00 2.00 wax Hydrogenated Vegetable Oil 1.50 - - - - - - Trihydroxystearin 0.50 - - - - - - inorganic thickener Disteadimonium Hectorite - 1.80 1.80 1.80 1.80 1.80 1.80 Prime Minister
WATER 34 30 30 30 30 30 30 SODIUM CHLORIDE 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Butylene Glycol 9.00 5.00 5.00 5.00 5.00 5.00 5.00 Ethylhexylglycerin 0.05 0.05 0.05 0.05 0.05 0.05 Glyceryl Caprylate 0.10 0.10 0.10 0.10 0.10 0.10 0.10

Raw material name Example 2 Example 3 Example 4 Comparative Example 7 Example 5 Comparative Example 8 oil C12-15 Alkyl Benzoate To 100 To 100 To 100 To 100 To 100 To 100 Coco-Caprylate/Caprate 5.00 5.00 5.00 5.00 5.00 5.00 Dicaprylyl Ether 5.00 5.00 5.00 5.00 5.00 5.00 Methyl Trimethicone 3.00 3.00 1.5 - 3.00 3.00 BUTYLENE GLYCOL DICAPRYLATE/DICAPRATE 3.00 3.00 1.5 - 3.00 3.00 Caprylic/Capric Triglycerides* 12 12 12 12 12 12 water-in-oil type
emulsifier Polyglyceryl-2 Dipolyhydroxystearate 1.00 1.00 2.00 4.00 1.00 1.00 Lauryl polyglyceryl-3 Polydimethylsiloxyethyl Dimethicone 1.00 1.00 2.00 4.00 1.00 1.00 SORBITAN IOSTEARATE - - 1.00 4.00 1.00 1.00 SORBITAN STEARATE 1.00 - - - - - SORBITAN SESQUIOLEATE - 1.00 - - - - DIISOSTEAROYL POLYGLYCERYL-3 DIMER DILINOLEATE 5.00 5.00 6.00 6.00 5.00 5.00 POLYGLYCERYL-4 DIISOSTEARATE/POLYHYDROXYSTEARATE/SEBACATE 1.00 1.00 2.00 4.00 1.00 1.00 sunscreen Titanium Dioxide 5.7 5.7 5.7 5.7 5.7 5.7 Zinc Oxide 7.8 7.8 7.8 7.8 7.8 7.8 powder SILICA 2.00 2.00 2.00 2.00 2.00 2.00 VINYL DIMETHICONE/METHICONE SILSESQUIOXANE CROSSPOLYMER 2.00 2.00 2.00 2.00 2.00 2.00 inorganic thickener Disteadimonium Hectorite 1.80 1.80 1.80 1.80 2.5 6.0 Prime Minister WATER 30 30 30 30 30 30 SODIUM CHLORIDE 1.00 1.00 1.00 1.00 1.00 1.00 Butylene Glycol 5.00 5.00 5.00 5.00 5.00 5.00 Ethylhexylglycerin 0.05 0.05 0.05 0.05 0.05 0.05 Glyceryl Caprylate 0.10 0.10 0.10 0.10 0.10 0.10

Experimental example 1 - Formulation stability observation

The dispersibility and formulation stability of the cosmetic composition for UV protection prepared by the above formulation were observed and shown in Tables 3 and 4 below, and pictures of the observed stability of precipitation of Example 1 and Comparative Example 1 are shown in FIGS. 1A and 1B. , Example 1 and Comparative Example 6, and pictures of the observation of the emulsion stability are shown in Figures 2a and 2b.

Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Example 1 emulsion stability
(Acceleration) error error error error Good Good High temperature stability (4 weeks) oil separation
poor dispersion oil separation
poor dispersion poor dispersion oil separation
poor dispersion poor dispersion Good

Example 2 Example 3 Example 4 Comparative Example 7 Example 6 Comparative Example 8 stability Good Good Good low viscosity Good poor dispersion

Referring to Tables 3 and 4 above, when only two types of emulsifiers were used (Comparative Examples 2 to 5), emulsion stability was not ensured and cycling shaking was performed for 3 days (-0 ℃ ~ 45 ℃ 1 cycle/24) time, rotation at 150 rpm), the emulsified particles were broken and water was separated.

When DIISOSTEAROYL POLYGLYCERYL-3 DIMER DILINOLEATE emulsifier having a bulky structure was used as the main surfactant and an auxiliary emulsifier having a bulky structure and a linear structure was used (Comparative Example 6), emulsion stability was secured, but dispersibility was lowered at high temperature.

Finally, in the case of Example 1 in which four types of polyglyceryl-based emulsifiers having different structures and a linear auxiliary emulsifier were additionally used, both dispersibility and emulsion stability at high temperature were secured.

In addition, excellent effects in emulsification stability and high temperature dispersibility were confirmed even when other sorbitan-based emulsifiers were used among the linear auxiliary emulsifiers (Examples 2 and 3). In addition, when the polyglyceryl-based and sorbitan-based emulsifiers were increased to 13% by weight (Example 4) and 22% by weight (Comparative Example 7), effects similar to those of Example 1 in emulsion stability and dispersibility could be realized. However, in the case of Comparative Example 7, the viscosity of the contents was formed too low, and it was difficult to implement the quality as a product due to stickiness and stiff feeling.

When the inorganic thickener is increased, when it is used at 2.5% by weight (Example 5), it is possible to secure stability and feel similar to Example 1, but when used in an amount exceeding 5% by weight (Comparative Example 8) High temperature Dispersibility was inhibited.

Therefore, the content of the emulsifier is 1 to 20% by weight, and the content of the inorganic thickener is 0.5% to 5% by weight in order to realize an appropriate feeling of use and secure stability as a product to overcome the limitations of the prior art.

Experimental example 2 - Measurement of formulation stability and UV protection effect

Formulation stability, accelerated stability, and UV protection effect at room temperature of the cosmetic compositions according to Example 1 and Comparative Example 1 of the present invention were measured and shown in Table 5 below.

Comparative Example 1 Example 1 Room temperature (6 months) precipitation no precipitation Acceleration stability (4 weeks) oil separation Good UV protection effect SPF 32 45 PA ++ ++

When comparing the UV blocking effect of Comparative Example 1 to which the prior art is applied and Example 1 in which both dispersibility and emulsification limitation at high temperature are secured, the UVB blocking effect increases, and the PA, which is the UVA blocking effect, secures the same grade Could. Therefore, it was confirmed that the cosmetic composition for UV protection according to the present invention has excellent UV protection effect compared to the conventional cosmetic composition for UV protection without using a PEG-based emulsifier.

Claims (16)

oil, emulsifier, sunscreen and water phase,
The emulsifier includes a polyglyceryl-based emulsifier and a sorbitan-based emulsifier,
The content of the polyglyceryl-based emulsifier is 8 to 12% by weight based on the total weight of the composition,
The polyglyceryl-based emulsifier is polyglyceryl-2dipolyhydroxystearate, laurylpolyglyceryl-3polydimethylsiloxyethyldimethicone, diisostearoyl polyglyceryl-3 dimer dilinoleat, Polyglyceryl-4 diisostearate/holyhydroxystearate/sebacate, polyglyceryl-2triisostearate, polyglyceryl-3diisostearate, polyglyceryl-2diisostearate and poly It contains 4 or more selected from the group consisting of glyceryl-3 polydimethylsiloxyethyldimethicone,
The oils include C12-15 alkyl benzoates, coco-caprylate/caprate, dicapryl ether, cocoglyceride, methyl trimethicone, butylene glycol dicaprylate/dicaprate and caprylic/capric triglycone. At least one selected from the group consisting of cerides,
The sunscreen is an inorganic sunscreen,
A cosmetic composition for sunscreen.
delete According to claim 1,
The sorbitan-based emulsifier consists of sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan tristearate, sorbitan monooleate, sorbitan sesquioleate and sorbitan isostearate. A cosmetic composition for sunscreen comprising at least one selected from the group.
According to claim 1,
The content of the emulsifier is a cosmetic composition for sunscreen, characterized in that more than 8% by weight and not more than 20% by weight based on the total weight of the cosmetic composition.
delete According to claim 1,
The content of the oil is a cosmetic composition for sunscreen, characterized in that 10 to 40% by weight based on the total weight of the cosmetic composition.
According to claim 1,
The inorganic sunscreen cosmetic composition for sunscreen, characterized in that at least one selected from the group consisting of titanium dioxide, zinc oxide and iron oxide.
According to claim 1,
The amount of the inorganic sunscreen is 10 to 40% by weight based on the total weight of the cosmetic composition.
According to claim 1,
The water phase part is a cosmetic composition for UV protection comprising at least one selected from the group consisting of water, hydrogen chloride, butylene glycol, ethylhexyl glycerin, and glyceryl caprylate.
According to claim 1,
The amount of the aqueous phase part is a cosmetic composition for sunscreen, characterized in that 20 to 50% by weight based on the total weight of the cosmetic composition.
According to claim 1,
The cosmetic composition is a cosmetic composition for sunscreen, characterized in that it further comprises one or more of powder, wax, and inorganic thickener.
12. The method of claim 11,
The amount of the powder is 1 to 10% by weight based on the total weight of the cosmetic composition.
12. The method of claim 11,
The amount of the wax is 0.5 to 5% by weight based on the total weight of the cosmetic composition.
12. The method of claim 11,
The inorganic thickener is a cosmetic composition for UV protection, characterized in that it is a hectorite-based inorganic thickener.
12. The method of claim 11,
The amount of the inorganic thickener is 0.5 to 5% by weight based on the total weight of the cosmetic composition.
According to claim 1,
The cosmetic composition for sunscreen is a cosmetic composition for sunscreen, characterized in that it is a water-in-oil type.

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