JP2014118386A - Solid oil-in-water emulsion cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid oil-in-water emulsion cosmetic giving a fresh and cool feeling during use, being easy to remove from the skin with a smooth feeling of use in spite of excellent adhesivity to the skin, having an excellent shape retention property in continuous use, and being excellent in portability.SOLUTION: The solid oil-in-water emulsion cosmetic contains (a) 1.0 - 3.5% by weight of agar, (b) 0.05 - 1.0% by weight of an acrylic acid amide system water-soluble thickener, and (c) an oil solution.

Description

The present invention is excellent in the properties of oil-in-water emulsified cosmetics such as fresh and refreshing usability and adhesion to the skin, while the cosmetics are easy to remove from the applied body and have a smooth usability. The present invention relates to a solid oil-in-water emulsified cosmetic that has high form retention during use and excellent portability.

Conventionally, water-based cosmetics such as oil-in-water emulsified cosmetics have been widely used as cosmetic preparations that are fresh and have a refreshing and refreshing feeling and a natural finish.

As a form of conventional oil-in-water emulsified cosmetics, emulsion, liquid, cream, etc. are common. Further, the container form is mostly a bottle form or a tube form sealed with a cap, which is inconvenient from the viewpoint of usability and portability. In recent years, in addition to these cosmetic forms, a technique for providing an oil-in-water emulsified cosmetic made into a solid using a water-soluble solidifying agent such as agar or gelatin has been developed (see, for example, Patent Document 1).

Such solid oil-in-water emulsified cosmetics are fresh and have excellent refreshing usability and, in addition, good portability. On the other hand, when compared with solid water-in-oil emulsified cosmetics, when the cosmetics are taken with a coated body such as a finger or applicator, the coated body slides on the surface of the cosmetic and the cosmetics are removed. There was a fault that it was bad. Therefore, various ideas have been made to improve the removal of the oil-in-water emulsified solid cosmetic. For example, as in Patent Document 2, a water-holding sheet-like material is applied to the cosmetic surface before the oil-in-water cosmetic filled in the container is solidified, and after cooling and solidifying, the water-holding sheet-like material is peeled off to remove the surface layer. Techniques have been developed that improve the removal of cosmetics by removal.

JP-A-5-178723 JP-A-7-17828

However, in the technique of peeling the water-soluble sheet-like material affixed to the cosmetic surface of Patent Document 2, although the initial ease of using a new cosmetic is slightly improved, the water-soluble sheet-like material is peeled off. As for the ease of removal when the cosmetic material is repeatedly used, the improvement effect was not sufficient. In addition, because the cosmetics are insufficiently taken, a strong force is applied to the fingers and the applicator to take more cosmetics, and when the cosmetics are used repeatedly, the solid cosmetics break. However, there are problems such as collapse, and it is impossible to satisfy contradictory characteristics such as usability such as ease of removal and hardness that can withstand repeated use and portability.

For this reason, it is a characteristic of oil-in-water emulsified cosmetics, it has a fresh and refreshing usability, excellent adhesion to the skin, and it has a smooth and smooth feeling when taking the cosmetics on the coated body, and A solid oil-in-water emulsified cosmetic that has high form retention during continuous use and excellent portability has been desired.

In view of such circumstances, the present inventor has intensively studied, and as a result, the present invention provides an oil-in-water emulsified solid cosmetic that combines agar as a water-soluble solidifying agent with a water-soluble thickener based on an acrylic acid amide. It has a sensation of use, good removal of cosmetics on the coated body, high adhesion to the skin, smooth use, high form retention during continuous use, and excellent portability. I found.

Furthermore, the acrylic amide-based water-soluble thickener used in the present invention preferably contains a copolymer containing acryloyldimethyltaurine salt as a structural unit, more preferably acryloyldimethyltaurine salt and hydroxyacrylate. By containing one or two or more kinds selected from a copolymer having ethyl and / or acrylate as a structural unit, it is easy to remove the cosmetic from the applied body, and the form during continuous use The inventors have found that the retainability is remarkably improved and have completed the present invention.

That is, the present invention includes the following components (a) to (c);
(A) 1.0 mass% to 3.5 mass% of agar
(B) 0.05% by mass to 1.0% by mass of an acrylic acid amide-based water-soluble thickener
(C) An oil-in-water emulsified solid cosmetic comprising an oil.

Further, (b) the acrylic amide-based water-soluble thickener is preferably a copolymer containing acryloyldimethyltaurine salt as a structural unit, more preferably acryloyldimethyltaurine salt and hydroxyethyl acrylate and The oil-in-water emulsified solid cosmetic according to claim 1, wherein the oil-in-water emulsified solid cosmetic is one or more selected from copolymers having acrylate as a structural unit.

The oil-in-water type emulsified solid cosmetic according to the present invention has a fresh and refreshing usability, good removal of the cosmetic on the applied body, high adhesion to the skin and a smooth usability, and continuous use It is possible to provide a solid oil-in-water emulsified cosmetic that has high form retention and excellent portability.

Hereinafter, preferred embodiments of the oil-in-water emulsified solid cosmetic of the present invention will be described in detail.

The present invention comprises (a) 1.0% to 3.5% by weight of agar, (b) 0.05% to 1.0% by weight of an acrylic amide water-soluble thickener, and (c) an oil agent. It has a fresh, refreshing feel, good removal of cosmetics on the coated body, high adhesion to the skin, and a smooth feeling of use. It is a solid oil-in-water emulsified cosmetic that is highly portable and excellent in portability.

In the present invention, a water-soluble solidifying agent is used in order to solidify the oil-in-water emulsified cosmetic and to give hardness that can withstand usability and portability. As the water-soluble solidifying agent, (a) agar is particularly preferable from the viewpoint of use. Examples of (a) agar include Ultra Agar AX-200 (manufactured by Ina Food Industry Co., Ltd.) and the like as commercially available products.

The content of (a) agar used in the oil-in-water emulsified solid cosmetic of the present invention is preferably 1.0% by mass to 3.5% by mass in the total amount of the oil-in-water emulsified solid cosmetic. When it is less than 1.0% by mass, it is not preferable from the viewpoints of form retention and drop strength during continuous use. Moreover, when it exceeds 3.5 mass%, it is unpreferable from the viewpoint of the ease of taking off, a feeling of close_contact | adherence, and a feeling of use (smooth usability), and the form retainability at the time of continuous use.

Examples of the (b) acrylic acid amide water-soluble thickener used in the oil-in-water emulsified solid cosmetic of the present invention include (hydroxyethyl acrylate / acryloyldimethyltaurine Na) copolymer and (Na acrylate / acryloyldimethyl). Taurine Na) copolymer, (acryloyldimethyltauronium ammonium / VP) copolymer, (acryloyldimethyltaurine ammonium methacrylate behenes-25) crosspolymer, and the like. Among these, (hydroxyethyl acrylate / acryloyl dimethyl taurine Na) copolymer, (Na acrylate / acryloyl dimethyl taurine Na) copolymer are particularly preferable, and one kind selected from the above-mentioned acrylic amide water-soluble thickeners, Or 2 or more types can be used.

(B) Commercially available products may be used as the acrylic amide water-soluble thickener. For example, commercially available products of (hydroxyethyl acrylate / acryloyldimethyltaurine Na) copolymer include SEPINOV EMT10, SIMULGEL NS (manufactured by SEPPIC). Moreover, SIMULGEL EG (made by SEPPIC) etc. are mention | raise | lifted as a commercial item of the (acrylic acid Na / acryloyl dimethyltaurine Na) copolymer. (Acrytoyl dimethyl taurine ammonium / VP) copolymer as a commercial product, such as Aristoflex AVC (manufactured by Clariant), (Acryloyl dimethyl taurine ammonium methacrylate behenes-25) As a commercial product of cross polymer, Aristoflex HMB (manufactured by Clariant) Etc.

In the present invention, the content of the (b) acrylic acid amide water-soluble thickener is preferably 0.05% by mass to 1.0% by mass in the total amount of the oil-in-water emulsified solid cosmetic. When it is less than 0.05% by mass, it is not preferable from the viewpoint of easy removal and form retention during continuous use. Moreover, when it exceeds 1.0 mass%, it is unpreferable from a viewpoint of use feeling, such as the absence of a crispy feeling (smooth usability), and drop strength.

The oil agent (c) used in the oil-in-water emulsified solid cosmetic of the present invention is used for the purpose of a feeling of use such as emollient feeling and adhesion feeling, and is not particularly limited, and is usually used for cosmetics. Liquid oil, solid oil, and semi-solid oil can be used.

The liquid oil that can be blended in the present invention is not particularly limited as long as it is a liquid oil at room temperature and is usually used in cosmetics. Specifically, liquid oil such as liquid paraffin and squalane, malic acid Ester oil such as diisostearyl, isopropyl myristate, cetyl 2-ethylhexanoate, isopropyl palmitate, ethylhexyl palmitate, glyceryl tricaprylate / capric acid, glyceryl tri-2-ethylhexanoate, olive oil, castor oil, macadamia nut oil, Vegetable oils such as jojoba oil, higher alcohols such as oleyl alcohol, octyldodecanol and isostearyl alcohol, higher fatty acids such as isostearic acid and oleic acid, dimethylpolysiloxane, methylphenylpolysiloxane, decamethylcyclopentasiloxane Silicone oils such as emissions and the like. These liquid oil components can be used alone or in combination of two or more.

The solid oil and semi-solid oil that can be blended in the present invention are not particularly limited as long as they are usually used in cosmetics. Specifically, hydrocarbons such as petroleum jelly, paraffin wax, microcrystalline wax, and polyethylene are used. , Oils derived from plants such as hydrogenated castor oil, hydrogenated jojoba oil, carnauba wax and rice wax, esters such as glyceryl tribehenate and cholesterol fatty acid esters, higher fatty acids such as stearic acid and behenic acid, higher grades such as stearyl alcohol and behenyl alcohol Examples include alcohols, silicones such as alkyl-modified silicones, and acrylic-modified silicones. These solid oil and semi-solid oil components can be used alone or in combination of two or more.

In the oil-in-water emulsified solid cosmetic of the present invention, in addition to the essential components (a) to (c) described above, other components usually used in cosmetics, such as powder components, moisturizers, surfactants, etc. , UV absorbers, film forming agents, preservatives, vitamins, cosmetic ingredients, antioxidants, fragrances, and the like can be appropriately blended within the range that does not impair the effects of the present invention.

The powder component that can be blended in the present invention is not particularly limited as long as it is usually used in cosmetics. Specifically, mica, kaolin, synthetic mica, silica, calcium carbonate, magnesium carbonate, aluminum oxide. , Bengala, yellow iron oxide, black iron oxide, cobalt oxide, ultramarine, bitumen, titanium oxide, zinc oxide, pearl pigment (titanium mica, fish scale foil, bismuth oxychloride, etc.), boron nitride, organic pigment (red 228, red) 226, blue 404, etc.), polyethylene powder, polymethyl methacrylate, organopolysiloxane elastomer and the like. These powders may be a composite of two or more powders, and are subjected to a surface treatment by a known method using a silicone compound, a metal soap, an amino acid compound, a fluorine compound, or the like. Can also be used. These powders can be used singly or in combination of two or more in order to obtain a variety of feels of use, and when used as a cosmetic for makeup.

The humectant that can be blended in the present invention is not particularly limited as long as it is usually used in cosmetics. Specifically, glycerin, propylene glycol, 1,3-butylene glycol, dipropylene glycol, polyethylene glycol. Etc.

The use of the oil-in-water emulsified solid cosmetic of the present invention is not particularly limited, but it can be used as a cosmetic for skin care, makeup, hair, and the like. Preferably, it is suitable for foundation, eye shadow, teak, eyebrow, eyeliner, mascara, lipstick, foundation for foundation, and the like.

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. Prior to the description of the examples, the effect test method used in the present invention will be described.

<Evaluation method of oil-in-water emulsified solid cosmetic>
[Usability test]
Ten panelists specializing in cosmetics evaluation use the oil-in-water emulsified solid cosmetics of Examples and Comparative Examples, and “Ease of removal (removal of cosmetics on the applied body)”, “Feeling of adhesion to skin” With respect to each evaluation item of "With no feeling of crispness (smooth usability)", each person gave a five-point score according to the following evaluation criteria, and averaged the score of each obtained panel, Each item was determined in four stages based on this average score and the following criteria.
[Evaluation criteria]
Grades;
5 points: Very good 4 points: Good 3 points: Neither point 2: Somewhat bad 1 point: Bad [Criteria]
◎: Average point is 4.5 points or more ○: Average point is 3.5 points or more and less than 4.5 points △: Average point is 1.5 points or more and less than 3.5 points ×: Average point is less than 1.5 points

[Form retention during continuous use]
10 cosmetic panel evaluation specialists were asked to use the oil-in-water emulsified solid cosmetics of the Examples and Comparative Examples 50 times in succession, and whether the bulk form of the cosmetics is maintained or not. The grade of the stage was attached | subjected, the score of each obtained panel was averaged, and it judged in four steps based on this average score and the following criteria.
[Evaluation criteria]
Grades;
5 points: Very good 4 points: Slightly cracked in the bulk 3 points: Cracked in the bulk and the bulk peeled off as a small lump 2 points: The whole bulk cracked and the bulk peeled off as a lump 1 point: The whole bulk is cracked and the whole bulk is peeled off from the container [Criteria]
◎: Average point is 4.5 points or more ○: Average point is 3.5 points or more and less than 4.5 points △: Average point is 1.5 points or more and less than 3.5 points ×: Average point is less than 1.5 points

[Drop strength]
The bulk form maintainability after dropping the oil-in-water emulsified solid cosmetics of Examples and Comparative Examples from a height of 50 cm onto a plywood having a thickness of 15 mm in four steps based on the following evaluation criteria. evaluated.
[Evaluation criteria]
◎: No bulk collapse ○: Bulk surface is slightly collapsed Δ: Bulk is partially collapsed ×: Bulk is totally collapsed

[Stability over time]
The oil-in-water emulsified solid cosmetics of Examples and Comparative Examples were allowed to stand in a constant temperature bath at 40 ° C., the appearance after 3 months was observed, and evaluated based on the following evaluation criteria.
[Evaluation criteria]
○: Abnormal (water or oil separation, sweating, powder aggregation, etc.) No: Abnormal (water or oil separation, sweating, powder aggregation, etc.)

(Examples 1-10 and Comparative Examples 1-11)
The oil-in-water emulsified solid cosmetic (teak) was prepared according to the formulations shown in Table 1 and Table 2 below. About the obtained composition (evaluation sample), evaluation of each item was implemented based on the said evaluation method. The results are also shown in Tables 1 and 2.

In addition, about each raw material of (Note 1)-(Note 5) in Table 1 and Table 2, the following commercial item was used, respectively. Moreover, the compounding quantity numerical value in Table 1 and Table 2 shows the mass%.
(Note 1) SEPINOV EMT10; manufactured by SEPPIC (* 2) SIMULGEL EG; manufactured by SEPPIC (* 3) Aristoflex AVC; manufactured by Clariant (* 4) Aristoflex HMB; Made by Ina Food Industry Co., Ltd.

(Adjustment method) The compositions of Examples 1 to 5 and Comparative Examples 1 to 5 were prepared by the following method. After mixing 1 to 16 raw materials, warming, 15 and 16 are dissolved to form an aqueous phase part. The oil phase part which mixed each raw material of 17-29 and the said water phase part were mixed and emulsified. Next, the produced bulk was filled in a container, cooled and solidified to obtain an oil-in-water emulsified solid cosmetic.

(Adjustment method) The compositions of Examples 6 to 10 and Comparative Examples 6 to 11 were prepared by the following method. After mixing each raw material of 1 to 9, warming, 7 to 9 are dissolved to make an aqueous phase part. The oil phase part which mixed each raw material of 10-22, and the said water phase part were mixed and emulsified. Next, the produced bulk was filled in a container, cooled and solidified to obtain an oil-in-water emulsified solid cosmetic.

  As is apparent from Tables 1 and 2, Examples 1 to 10, which are examples of the present invention, are easy to remove, have a feeling of close contact, no crispness, shape retention during continuous use, drop strength, time Good results were obtained in all the stability evaluation items. On the other hand, Comparative Examples 1-11 which do not satisfy | fill the structure of this invention were not able to satisfy all the evaluation items.

  Specifically, Comparative Examples 1 to 6 and 11 lack any of the components (a) to (c) that are essential components of the present invention. In Comparative Example 1, since the amide amide water-soluble thickener (component (b)) was lacking, there was a problem in ease of removal and form retention during continuous use. In Comparative Examples 2 to 5 using a thickener other than the acrylamide-based water-soluble thickener, compared with Examples 1 to 10 in terms of ease of removal, feeling of adhesion, form retention during continuous use, and stability over time The result was far inferior. In particular, it was not possible to obtain a satisfactory result satisfying both conflicting characteristics such as easy removal and improved form retention during continuous use.

  Moreover, in Comparative Example 6 using a water-soluble solidifying agent other than agar as the component (a), there were problems in ease of removal, adhesion, form retention during continuous use, and stability over time. In Comparative Example 11, since the oil agent as component (c) was lacking, there was a problem with the lack of adhesion and a feeling of crispness.

  Examples 11 to 13 are shown below as other examples of the present invention.

[Example 11: Foundation]
(Compounding ingredients) (mass%)
(1) Butylene glycol 15.0
(2) Glycerin 6.0
(3) Preservative Appropriate amount (4) Water Residual (5) Hyaluronic acid Na (1% by weight aqueous solution) 2.0
(6) (Hydroxyethyl acrylate / acryloyldimethyltaurine Na) copolymer (Note 1) 0.3
(7) Xanthan gum 0.05
(8) Agar (Note 5) 1.5
(9) Gellan gum 0.15
(10) PEG-60 hydrogenated castor oil 1.2
(11) Squalane 1.0
(12) Vaseline 1.0
(13) Carnauba 0.2
(14) Sorbitan isostearate 0.1
(15) Cyclopentasiloxane 1.0
(16) Trimethylsiloxysilicic acid 1.0
(17) Ethylhexyl methoxycinnamate 4.0
(18) Octocrylene 2.0
(19) Diethylaminohydroxybenzoyl hexyl benzoate 1.0
(20) Natural vitamin E 0.02
(21) Silicone-treated titanium oxide 7.0
(22) Silicone-treated yellow iron oxide 2.4
(23) Silicone-treated red iron oxide 0.36
(24) Silicone-treated black iron oxide 0.18
(25) Silicone-treated mica 1.0
(26) Silica 2.0
(27) Hydrogenated lecithin 1.9

(Manufacturing method) After mixing the blending components (1) to (9), warming is performed, and (8) and (9) are dissolved to form an aqueous phase part. The oil phase part mixed with (10) to (27) and the aqueous phase part were mixed and emulsified. Next, the produced bulk was filled in a container, cooled and solidified to obtain a foundation.

  The foundation of the above Example 11 has a fresh and refreshing usability, excellent adhesion to the skin, good use of the cosmetic on the applied body, a smooth usability, and retention of form during continuous use It was a highly basic foundation.

[Example 12: Eye shadow]
(Compounding ingredients) (mass%)
(1) Butylene glycol 6.0
(2) Glycerin 3.0
(3) Preservative Appropriate amount (4) Water Residue (5) (Hydroxyethyl acrylate / acryloyldimethyltaurine Na) copolymer (Note 1) 0.2
(6) Xanthan gum 0.1
(7) Agar (Note 5) 2.1
(8) Gellan gum 0.1
(9) PEG-60 hydrogenated castor oil 1.2
(10) Cetyl ethylhexanoate 5.0
(11) Dimethicone 0.5
(12) Natural vitamin E 0.02
(13) Sorbitan isostearate 0.2
(14) Silicone-treated yellow iron oxide 0.15
(15) Silicone-treated red iron oxide 0.12
(16) Red No. 226 0.12
(17) Silicone-treated mica 1.5
(18) Titanium oxide coated glass powder 12.0
(19) Titanium oxide coated mica 3.0
(20) Hydrogenated lecithin 0.5

(Manufacturing method) After mixing the compounding components (1) to (8), warming is performed, and (7) and (8) are dissolved to form an aqueous phase part. The oil phase part mixed with (9) to (20) and the aqueous phase part were mixed and emulsified. Next, the produced bulk was filled in a container, cooled and solidified to obtain an eye shadow.

  The eye shadow of Example 12 above has a fresh and refreshing usability, excellent adhesion to the skin, good cosmetic use and a smooth usability, and a form of continuous use The eye shadow was highly retainable.

[Example 13: Eye cream]
(Compounding ingredients) (mass%)
(1) Butylene glycol 4.0
(2) Glycerin 6.0
(3) Dipropylene glycol 3.0
(4) Hyaluronic acid Na (1% by weight aqueous solution) 2.0
(5) Preservative Appropriate amount (6) Water Residue (7) (Hydroxyethyl acrylate / acryloyldimethyltaurine Na) copolymer (Note 1) 0.6
(8) Agar (Note 5) 3.0
(9) Gellan gum 0.3
(10) PEG-60 hydrogenated castor oil 1.0
(11) Cetyl ethylhexanoate 2.0
(12) Jojoba oil 1.0
(13) Squalane 3.0
(14) Cetostearyl alcohol 0.5
(15) Natural vitamin E 0.01

(Manufacturing method) After mixing the blending components (1) to (9), warming is performed, and (8) and (9) are dissolved to form an aqueous phase part. The oil phase part mixed with (10) to (15) and the aqueous phase part were mixed and emulsified. Next, the produced bulk was filled in a container, cooled and solidified to obtain an eye cream.

  The eye cream of Example 13 has a fresh and refreshing usability, has excellent adhesion to the skin, has a good and smooth feel when applied to the coated body of cosmetics, and a form during continuous use It was an eye cream with high retention.

Claims (3)

An oil-in-water emulsified solid cosmetic comprising the following (a) to (c):
(A) 1.0 mass% to 3.5 mass% of agar
(B) 0.05% by mass to 1.0% by mass of an acrylic acid amide-based water-soluble thickener
(C) Oil agent The oil-in-water emulsified solid cosmetic according to claim 1, wherein the component (b) is a copolymer containing acryloyldimethyltaurine salt as a structural unit. The component (b) is one or two or more selected from copolymers comprising acryloyldimethyltaurine salt and hydroxyethyl acrylate and / or acrylate as structural units. Item 2. The oil-in-water emulsified solid cosmetic according to Item 1.