JP6608310B2 - Oil-in-water emulsified cosmetic - Google Patents

Description

  The present invention relates to an oil-in-water emulsified cosmetic that has a feeling of thickness at the time of application and smoothness after being blended, has no stickiness after being blended, and has an excellent feeling of use.

  With regard to the composition for external use, it is considered as a very preferable characteristic as a preparation for external use that it has a good elongation when applied to the skin, and is thick and has no stickiness (Patent Document 1: Japanese Patent Application Laid-Open No. 2006-143632). An acrylic acid / alkyl methacrylate copolymer is known as one of the preferred components from the viewpoint of providing an optimum thickness during coating (Patent Document 2: JP 2014-148471 A, Patent Document 3: JP 2015). -98452). However, the acrylic acid / alkyl methacrylate copolymer alone cannot always give a sufficient thickness, and has a problem of stickiness after coating. With respect to the feeling of thickness, emphasis is particularly placed on massage cosmetics. Even if massage treatment is performed for a long time, the hardness of the cosmetic is maintained, stable treatment can be performed while always feeling the thickness of the cosmetic between the hand and the skin, and there is little skin friction during the massage treatment, and smooth It is regarded as a preferable property of massage cosmetics that a smooth skin can be obtained (Patent Document 4: JP 2012-36145 A). However, since the massage cosmetics are designed on the premise that they are washed away with water after the massage operation, familiarity with the skin is not considered. In general emulsions and creams, even if a thick feeling of use is required, smoothness after fitting and non-stickiness are required.

A water-in-oil cosmetic containing a dextrin fatty acid ester is known, and as a dextrin fatty acid ester, an isostearic acid dextrin ester is exemplified as a water-resistant active ingredient (Patent Document 5: JP-A-5-32520). Issue gazette).
A hair cosmetic containing a dextrin fatty acid ester, an amino-modified silicone, and a highly polymerized silicone compound is known, and the highly polymerized silicone is said to have an effect after finishing the hair cosmetic (Patent Document 6: Japanese Patent Laid-Open No. 2005-26883). 2013-91637).

JP 2006-143632 A JP 2014-148471 A Japanese Patent Laying-Open No. 2015-98452 JP 2012-36145 A Japanese Patent Laid-Open No. 5-32520 JP 2013-91637 A

  An object of the present invention is to obtain an oil-in-water emulsified cosmetic that is excellent in thickness when applied to the skin, has no stickiness after being applied, is smooth, and gives a feeling of elasticity.

  When the present inventors apply an oil-in-water emulsified cosmetic containing an (acrylates / alkyl acrylate (C10-30)) crosspolymer, dextrin isostearate, a highly polymerized dimethylpolysiloxane and a specific higher alcohol to the skin. The present invention was completed by finding that the material has an excellent thickness feeling, has no stickiness after being familiar, is smooth and gives a feeling of elasticity.

The main configuration of the present invention is as follows.
(1) An oil-in-water emulsified cosmetic containing the following (A) to (D).
(A) (Acrylates / alkyl acrylate (C10-30)) crosspolymer and / or salt thereof (B) Dextrin isostearate (C) Highly polymerized dimethylpolysiloxane having a degree of polymerization of 2500 to 10,000 (D) 14 carbon atoms The oil-in-water emulsified cosmetic according to (1), wherein the degree of polymerization of the highly polymerized dimethylpolysiloxane of the linear higher alcohol (2) to (C) component of 24 to 24 is 2500 to 3600.

  It was possible to provide an oil-in-water emulsified cosmetic that is excellent in thickness when applied to the skin, is smooth after being blended, has no stickiness, and gives a feeling of stickiness.

  In the present invention, the realization of “thickness” is an issue. “Thickness” is a kind of touch when a preparation is applied, and various definitions are made. As the definition of “thickness”, for example, “feeling of feeling the thickness of cosmetics between hand and skin” (Japanese Patent Laid-Open No. 2012-36145), “thickness” means applying cosmetics to the skin. When massaged, fingertips feel a sense of elasticity against cosmetics ”(Japanese Patent Laid-Open No. 2015-98452),“ Thickness of water-soluble polymer (resistance when massaged with fingers after being applied to skin) ) "(Japanese Patent Application Laid-Open No. 2000-143480)," Thickness and richness (feeling that the thickness of the agent is felt at the time of application, and that the skin does not come into contact with the hand), and the skin cleansing composition is placed on the skin by hand Consider the case of stretching and spreading, which corresponds to the case where the agent is sandwiched between two plates (model corresponding to skin and hands) and only one plate (hand) is moved. On the surface of the skin), the moving speed of the agent is 0. The moving speed of the agent on the surface of the moving plate (hand) is maximized, and on the surface of the moving plate (hand), the polymer chains and rod-like micelles stretched by shear and oriented in the flow direction are restored to their original shape. The stress caused by the force to return (tension) is also maximum, while no stress is generated on the surface of the fixed plate (skin) .Two such surfaces (hand and skin) The stress difference between them creates a pressure from the surface of the hand to the surface of the skin, which gives a feeling that the hand and the skin are difficult to touch, and uses a special mild feeling and richness. For example, ”(Japanese Patent Laid-Open No. 2011-178681) and the like. In the present application, the “thickness” is defined as “when the preparation is applied to the skin with a finger or hand, the thickness of the preparation is felt between the finger or hand and the skin, and the preparation flows smoothly, thereby causing the skin to rub. It is defined as “feeling not felt”.

  In the present invention, it is an object to realize a “smooth and non-sticky feel after familiarization”. It is important that there is a “thickness” when spreading, and it is important not to let the skin feel any friction. It is important not to let you feel. Therefore, in the present application, “smoothness after familiarization” and “non-stickiness after familiarity” are evaluated together with “thickness”.

The (acrylates / alkyl acrylate (C10-30)) crosspolymer or salt thereof used in the present invention is a co-polymer of one or more monomers consisting of acrylic acid, methacrylic acid or simple esters thereof and alkyl acrylate (C10-C30). Polymers crosslinked with sucrose allyl ether or pentaerythritol allyl ether, and salts thereof. The salt of the (acrylates / alkyl acrylate (C10-30)) crosspolymer is preferably an alkali metal salt such as sodium salt or potassium salt, a salt with an amine such as triethanolamine, a salt with a basic amino acid, or the like. Commercially available products can be used, such as AQUPEC HV-701ER manufactured by Sumitomo Seika, Carbopol 1342 polymer manufactured by Nippon Lubrizol, Carbopol 1382 polymer, Carbopol ETD 2020 Polymer Polymer, Carbopol Ultra 20 TR-1 Polymeric Emulsifier, Pemulen TR-2 Polymeric Emulsifier, etc. are mentioned.
The blending amount of the (acrylates / alkyl acrylate (C10-30)) crosspolymer or a salt thereof to be blended in the oil-in-water emulsified cosmetic of the present invention is preferably 0.02 to 0.2% by mass, and 0.05 to 0. .15% by mass is particularly preferred. If the amount is less than 0.02% by mass, the feeling of thickness may not be sufficient. If the amount exceeds 0.2% by mass, the smoothness after conforming and the non-stickiness after conforming may be impaired.

The dextrin isostearate used in the present invention is an ester of isostearic acid and dextrin. Commercially available products can be used, and examples of commercially available products include Unifilma HVY made by Chiba Milling.
0.01-0.5 mass% is preferable, and, as for the compounding quantity of the isostearic acid dextrin mix | blended with the oil-in-water emulsion type cosmetics of this invention, 0.03-0.3 mass% is especially preferable. If it is less than 0.01% by mass, the feeling of thickness may not be sufficient, and if it exceeds 0.5% by mass, the smoothness after conforming and the non-stickiness after conforming may be impaired.

The highly polymerized dimethylpolysiloxane having a degree of polymerization of 2500 to 10,000 used in the present invention is a polymer in which 2500 to 10,000 dimethylsiloxane units are polymerized, and both ends are trimethylsiloxane. A more preferable degree of polymerization is in the range of 2500 to 3600, and is about 2 million mm2 / s to about 20 million mm2 / s in terms of viscosity value.
Examples of commercially available highly polymerized dimethylpolysiloxane having a degree of polymerization of 2500 to 10,000 include BY11-040 (from the viscosity of 4 million mm2 / s of highly polymerized dimethylpolysiloxane dispersed in BY11-040 to the formula of AJ Barry. (Degree of polymerization calculated in J. Appl. Physics. 17.1020 [1946]) is 2800), BY11-003, BY11-007, BY11-026 (viscosity of highly polymerized dimethylpolysiloxane dispersed in BY11-026) The polymerization degree calculated from the AJ Barry equation (J. Appl. Physics. 17.1020 [1946]) from 10 million mm2 / s is 3200) (manufactured by Dow Corning Toray), KF9008, MK- 15H (highly polymerized dimethylpolysiloxane at a concentration of 20% by mass and a viscosity of 20 mm 2 The viscosity of the dispersion is 45,000 mPa · s, and the weight of the highly polymerized dimethylpolysiloxane in MK-15H obtained by analyzing MK15H by gel permeation chromatography. The average molecular weight was 590,000. The degree of polymerization of the highly polymerized dimethylpolysiloxane in MK-15H was obtained by dividing the weight average molecular weight of the highly polymerized dimethylpolysiloxane in MK-15H by the molecular weight 74 of the basic unit of dimethylpolysiloxane. 8,000 (made by Shin-Etsu Chemical Co., Ltd.), TSE-200, TSE-200A (made by Momentive Performance Materials Japan), etc. can be used.
As the highly polymerized dimethylpolysiloxane having a degree of polymerization of 2500 to 10000 used in the present invention, those previously dispersed in a low viscosity liquid can be used.
The blending amount of the highly polymerized dimethylpolysiloxane having a degree of polymerization of 2500 to 10,000 used in the present invention is preferably 0.05 to 1% by mass, particularly preferably 0.1 to 0.5% by mass.

Examples of the linear higher alcohol having 14 to 24 carbon atoms used in the present invention include myristyl alcohol, cetyl alcohol, stearyl alcohol, arachidyl alcohol, behenyl alcohol, and tetracosanol.
As for the compounding quantity of the C14-24 linear higher alcohol used for this invention, 0.1-2 mass% is preferable.

  Examples of the oil agent other than the component (C) and the component (D) to be blended in the oil-in-water emulsion cosmetic of the present invention include triglycerides, ester oils, hydrocarbon oils, silicone oils and the like.

Triglycerides include olive oil, macadamia nut oil, sunflower seed oil, avocado oil, safflower oil, rice bran oil, rice germ oil, wheat germ oil, castor oil, grape seed oil, almond oil, palm oil, palm oil, and tri (capril / Examples thereof include glyceryl capric acid and glyceryl tri-2-ethylhexanoate.
Examples of ester oils include cetyl ethylhexanoate, 1,3-butylene glycol diisononanoate, 1,3-butylene glycol di-2-ethylhexanoate, dipropylene glycol diisononanoate, dipropylene glycol di-2-ethylhexanoate, Isononyl isononanoate, neopentyl glycol dicaprate, ethylhexyl palmitate, isostearyl neopentanoate, dilauroyl glutamate (phytosteryl / octyldodecyl), pentaerythritol tetra-2-ethylhexanoate, isostearyl / phytosteryl hydrogenated dimerlinoleate, An example is jojoba oil.
Examples of the hydrocarbon oil include liquid paraffin, squalene, squalane, and microcrystalline wax.
Examples of silicone oils include linear polysiloxane dimethylpolysiloxane (excluding component (C)), methylphenyl polysiloxane, and the like, cyclic polysiloxane decamethylcyclopentasiloxane, cyclopentasiloxane, and the like.

  In the oil-in-water emulsified cosmetic of the present invention, a polyhydric alcohol can be arbitrarily blended within a range not inhibiting the effects of the present invention. Examples of the polyhydric alcohol include glycerin, diglycerin, dipropylene glycol, 1,3-butylene glycol, 1,2-pentanediol, propylene glycol, polyethylene glycol, sorbitol, maltitol, and methylgluces-10.

  The oil-in-water emulsified cosmetic of the present invention includes components usually used in cosmetics, for example, thickeners, antioxidants, ultraviolet absorbers, moisturizers, fragrances, and fragrances, as long as the effects of the invention are not impaired. Agents, preservatives, pH adjusters, blood circulation promoters, cooling agents, antiperspirants, fungicides, skin activators, other cosmetic ingredients, medicinal ingredients, and the like can be blended.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.
1. Preparation and evaluation of oil-in-water emulsified cosmetics (1) Oil-in-water emulsified cosmetics Cosmetics of Examples 1 to 8 and Comparative Examples 1 to 6 having the compositions shown in Table 1 were prepared. In each table, the unit of the amount of composition is mass%. The preparation procedure is as follows.
1, 2, 16 to 20, 22 are mixed at 80 ° C. to obtain an aqueous phase. 3-15, 21, 23-28 are mixed at 80 degreeC, and it is set as an oil phase. The mixture is stirred and emulsified with a homomixer while gradually adding the aqueous phase to the oil phase at 80 ° C. Cool to room temperature while stirring with a spatula to give an oil-in-water emulsified cosmetic.

(2) Evaluation of cosmetics Feeling of use Evaluate the feeling of thickness at the time of application of the obtained oil-in-water emulsified cosmetics, smoothness after familiarization, non-stickiness after familiarization, and firmness feeling to five professional panelists And determined according to the following criteria.

(Thickness at the time of application)
A: All five people judged that there was a feeling of thickness at the time of application.
○: Three to four people judged that there was a feeling of thickness at the time of application.
(Triangle | delta); 1-2 persons judged having a feeling of thickness at the time of application | coating.
X: It was determined that 0 persons had a feeling of thickness at the time of application.

(Smoothness after getting used)
A: It was judged that all 5 people were smooth after being familiar.
○: It was determined that 3-4 people were smooth after being familiar.
Δ: It was determined that 1 or 2 people were smooth after being familiar.
X: It was determined that the name was smooth after 0 people became familiar.

(No stickiness after familiarization)
A: After all 5 people were familiar, it was determined that there was no stickiness.
○: After 3 to 4 people became familiar, it was determined that there was no stickiness.
○: It was determined that there was no stickiness after 1 or 2 people became familiar.
X: It was determined that there was no stickiness after 0 people became familiar.

(Harness)
◎; It was judged that all 5 people felt a sense of elasticity.
○: It was determined that 3 to 4 people felt a sense of elasticity.
Δ: It was determined that 1 to 2 persons felt a sense of elasticity.
X: It was determined that 0 people felt a sense of elasticity.

* 1: Highly polymerized dimethylpolysiloxane dispersed at a concentration of 30% by mass in Toray Dow Corning Silicone BY11-026 * 2: Dispersed at a concentration of 15% by mass in Toray Dow Corning Silicone BY11-040 Highly polymerized dimethylpolysiloxane * 3: Shin-Etsu Silicone Highly polymerized dimethylpolysiloxane dispersed at a concentration of 20% by mass in MK-15H

(3) Results (A) Component (Acrylates / alkyl acrylate (C10-30)) Crosspolymer, (B) Component dextrin isostearate, (C) Component Highly polymerized dimethylpolysiloxane having a polymerization degree of 2500 to 10,000, D) Ingredients 1 to 8, which are oil-in-water emulsified cosmetics containing a linear higher alcohol having 14 to 24 carbon atoms, have a feeling of thickness at the time of application, smoothness after acclimation, and stickiness after acclimation. It was excellent both in the sense of lack and elasticity.
Component (A) Comparative Example 1 in which a carbomer was blended in place of the (acrylates / alkyl acrylate (C10-30)) crosspolymer was inferior in the thickness feeling at the time of coating and inferior in the firmness.
(B) component The comparative example 2 which mix | blended (palmitic acid / ethylhexanoic acid) dextrin instead of the dextrin isostearic acid was also inferior to the thickness feeling at the time of application | coating, and the inferior feeling was also inferior.
Component (C): Comparative Example 3 in which dimethylpolysiloxane 1000000 cs (polymerization degree 2200) was blended instead of highly polymerized dimethylpolysiloxane having a polymerization degree of 2500 or more and 10,000 or less, and Comparative Example 4 in which dimethylpolysiloxane 1000 cs was blended were both applied. It was inferior in the feeling of thickness at the time, and inferior in smoothness after being familiar.
(D) component Comparative example 5 which mix | blended octyldodecanol instead of the C14-24 straight chain higher alcohol, and the comparative example 6 which mix | blended cetyl palmitate were both inferior to the stickiness after being familiar, The feeling was inferior.

[Formulation Example 1] Emulsion component Blending amount (% by mass)
1. Dextrin isostearate 0.1
2. Mixture of highly polymerized dimethylpolysiloxane and cyclopentasiloxane * 4 2
3. Dimethylpolysiloxane 100cs 2
4). Behenyl alcohol 0.3
5. Meadow foam oil 1
6). Tocopherol 0.2
7. Macadamia nut fatty acid phytosteryl 0.5
8). Squalane 1
9. Isotridecyl isononanoate 2
10. Polysorbate 60 2
11. Glyceryl stearate 0.8
12 Glycerin 5
13. 1,2-Pentanediol 2
14 BG 8
15. Maltitol 5
16. Raffinose 3
17. Xanthan gum 0.05
18. Ethylhexyl glycerin 0.2
19. (Hydroxyethyl acrylate / acryloyldimethyltaurine Na)
Copolymer mixture * 5 1
20. (Acrylates / alkyl acrylate (C10-30)) crosspolymer 0.1
21. Hydroxide K as appropriate 22. Purified water residue

* 4 Toray Dow Corning Silicone BY11-040
* 5 SEPPIC SIMULGEL NS
Components 12 to 22 were gradually added to and mixed with components 1 to 11 heated and dissolved, and then stirred and cooled to obtain an oil-in-water emulsion.

[Prescription Example 2] Cream Ingredient Amount (% by mass)
1. Dextrin isostearate 0.3
2. Mixture of highly polymerized dimethylpolysiloxane and dimethylpolysiloxane 20cs * 6 2
3. Dimethylpolysiloxane 100cs 5
4). Arachidyl alcohol 2
5. Sunflower seed oil 1
6). Lauroyl glutamate di (phytosteryl / octyldodecyl) 3
7. Triisostearin 1
8). Squalane 3
9. Isotridecyl isononanoate 3
10. Polyglyceryl stearate-10 1
11. Hydrogenated lecithin 0.6
12 Glycerin 8
13. 1,2-Pentanediol 2
14 BG 10
15. Tuberose polysaccharide (1% aqueous solution) 1
16. Betaine 3
17. Xanthan gum 0.1
18. Phenoxyethanol 0.2
19. Dipotassium glycyrrhizinate 0.1
20. (Acrylates / alkyl acrylate (C10-30)) crosspolymer 0.1
21. Hydroxide K as appropriate 22. Purified water residue

* 6 Toray Dow Corning Silicone BY11-026
Components 12 to 20 were gradually added to and mixed with components 1 to 11 heated and dissolved, and then stirred and cooled to obtain a cream.

[Formulation Example 3] Cream component Compounding amount (mass%)
1. Dextrin isostearate 0.1
2. Mixture of highly polymerized dimethylpolysiloxane and dimethylpolysiloxane * 7 2
3. (Dimethicone / vinyl dimethicone) Mixture of cross polymer and dimethylpolysiloxane * 8 2
4). Behenyl alcohol 1
5. Macadamia seed oil 1
6). Tocopherol 0.2
7. Tri (caprylic acid / capric acid / myristic acid / stearic acid)
Glyceryl 2
8). Pentaerythrityl tetraethylhexanoate 1
9. Isotridecyl isononanoate 2
10. Polysorbate 60 2
11. Glyceryl stearate 0.8
12 Glycerin 8
13. 1,2-Pentanediol 2
14 BG 5
15. Diglycerin 5
16. PEG-75 3
17. Sclerotium gum 0.05
18. Ethylhexyl glycerin 0.2
19. Hyaluronic acid Na (1% aqueous solution) 1
20. (Acrylates / alkyl acrylate (C10-30))
Cross polymer 0.05
21. Hydroxide K as appropriate 22. Purified water residue

* 7 Shin-Etsu Silicone MK-15H
* 8 Shin-Etsu Silicone KSG-016F
Components 12 to 22 were gradually added and mixed into the components 1 to 11 dissolved by heating, and then stirred and cooled to obtain a cream.

[Prescription Example 4] Face mask component Compounding amount (mass%)
1. Dextrin isostearate 0.1
2. Mixture of highly polymerized dimethylpolysiloxane and dimethylpolysiloxane * 7 1
3. (Dimethicone / phenylvinyldimethicone) Mixture of cross polymer and diphenylsiloxyphenyl trimethicone * 9 0.5
4). Dimethylpolysiloxane 50cs 3
5. Behenyl alcohol 0.4
6). Tocopherol 0.1
7. Tetra (hydroxystearic acid / isostearic acid)
Dipentaerythrityl 1
8). Pentaerythrityl tetraethylhexanoate 1
9. Isotridecyl isononanoate 2
10. Polyglyceryl stearate-10 1.5
11. Glyceryl stearate 1
12 Glyceryl glucoside 4
13. 1,2-Pentanediol 2
14 BG 5
15. Diglycerin 5
16. Glycerin 2
17. Carbomer 0.02
18. CMD 1
19. (Hydroxyethyl acrylate / acryloyldimethyltaurine Na)
Copolymer mixture * 6 0.5
20. (Acrylates / alkyl acrylate (C10-30))
Cross polymer 0.05
21. Hydroxide K as appropriate 22. Purified water residue

* 9 Shin-Etsu Silicone KSG-18A
Components 12 to 22 were gradually added to and mixed with components 1 to 11 heated and dissolved, and then stirred and cooled, and impregnated into a nonwoven fabric sheet to obtain a face mask.

Claims (2)

An oil-in-water emulsified cosmetic containing the following (A) to (D).
(A) (Acrylates / alkyl acrylate (C10-30)) crosspolymer and / or salt thereof (B) Dextrin isostearate (C) Highly polymerized dimethylpolysiloxane having a degree of polymerization of 2500 to 10,000 (D) 14 carbon atoms ~ 24 straight chain higher alcohols The oil-in-water emulsified cosmetic according to claim 1, wherein the degree of polymerization of the highly polymerized dimethylpolysiloxane (C) is 2500 or more and 3600 or less.