JP5138896B2 - Oil-in-water emulsified cosmetic - Google Patents

Description

  The present invention relates to an oil-in-water emulsified cosmetic containing a highly viscous oil agent, isotridecyl isononanoate, and polyethylene glycol. More specifically, the emulsification is highly effective in imparting firmness to the skin and improving elasticity and without stickiness. The present invention relates to an oil-in-water emulsified cosmetic having excellent stability.

Many cosmetics have been developed to restore the firmness and elasticity of loose skin such as the eyes, chest, and buttocks. As a technique for restoring the firmness and elasticity of the skin, there has been a technique for forming a film on the skin with a specific organopolysiloxane segment derivative and an active ingredient (see, for example, Patent Document 1). Moreover, there existed the technique (for example, refer patent document 2) which gives a firm feeling to skin using specific powder. On the other hand, high-viscosity oils have been used in makeup cosmetics such as lipsticks and have been used to improve gloss and moisture (see, for example, Patent Documents 3 to 5). Further, isotridecyl isononanoate is blended in an oil-in-water emulsified cosmetic, and has been used as an emulsification aid for emulsifying water in silicone oil (see, for example, Patent Documents 6 and 7). Furthermore, polyethylene glycol has been used as a humectant (see, for example, Patent Documents 8 and 9).
Japanese Patent No. 3472436 (pages 1 to 21) JP-A-11-180817 (pages 1 to 7) JP 2003-137733 A (pages 1 to 5) JP 2003-104843 A (page 1 to page 10) JP 2002-316910 A (pages 1 to 7) JP 2001-302489 A (page 1-8) JP-A-8-175953 (pages 1 to 5) Japanese Patent Laid-Open No. 5-170641 (page 1 to page 5) JP-A-8-310934 (pages 1 to 7)

However, in the technique of Patent Document 1, when applying elasticity with a film forming agent, there is a case where the film has less flexibility and the adhesion to the skin is weak, which may cause problems with the film over time due to the movement of the skin. there were. Moreover, in the technique of patent document 2, it is made to show the elasticity by the glossiness by the surface reflection of powder, and it did not improve elasticity which gives the skin elasticity. In the techniques of Patent Documents 3 to 5, 8, and 9, nothing is disclosed about giving elasticity to the skin and improving elasticity. Further, the techniques of Patent Documents 6 and 7 did not focus on the compatibility of isotridecyl isononanoate and a highly viscous oil agent. From the above, it has been desired to develop a cosmetic material that is effective in imparting firmness to the skin and improving elasticity, is excellent in use feeling, and is excellent in emulsion stability.

  In view of such circumstances, the present inventor has intensively studied, and as a result, a high-viscosity oil that gives firmness and elasticity and polyethylene glycol are combined with isotridecyl isononanoate to give firmness and elasticity. It has been found that the above-mentioned problems can be solved by combining high-viscosity oil, polyethylene glycol, and stickiness, and isotridecyl isononanoate, which has good compatibility with high-viscosity oil and improves stability, The present invention has been completed.

That is, the present invention includes the following components (A) to (C);
The present invention provides an oil-in-water emulsified cosmetic comprising (A) polybutene or heavy liquid isoparaffin (B) isotridecyl isononanoate (C) polyethylene glycol.

The kinematic viscosity at 100 ° C. of the component (A) is 300 to 5000 mm ² / s (hereinafter, unless otherwise specified, the kinematic viscosity is a value at 100 ° C.) Is to provide.

Moreover, the compounding quantity of a component (A) is 1-30 mass%, and the compounding quantity of a component (B) is 0.5-15 mass%, The oil-in-water type emulsion cosmetic characterized by the above-mentioned is provided. .

And the mixing | blending mass ratio of a component (A) and a component (B) is (A) / (B) = 0.1-20, It provides either of the said oil-in-water type emulsion cosmetics characterized by the above-mentioned. is there.

Furthermore, the oil-in-water emulsified cosmetic composition according to any one of the above, wherein the average molecular weight of the component (C) is 20,000 to 50,000.

  The oil-in-water emulsified cosmetic composition of the present invention has the advantages that it gives a firmness to the skin, has a high effect of improving elasticity, has no stickiness, and is excellent in emulsion stability.

In the oil-in-water emulsified cosmetic of the present invention, the highly viscous oil agent of component (A) is blended for the purpose of improving skin firmness and elasticity. The term “high viscosity” as used herein refers to a kinematic viscosity of 300 to 5000 mm ² / s from a liquid state to a high viscosity liquid state at room temperature. By blending the component (A) in this kinematic viscosity range, it is possible to obtain an oil-in-water emulsified cosmetic that gives the skin firmness and improved elasticity. Is a component (A), heavy liquid isoparaffin, polybutene is used. Commercially available products include polybutene 300H, polybutene 2000H food additive (kinematic viscosity 3804 mm ² / s) (made by Idemitsu Kosan Co., Ltd.), Pearl Ream 18 (kinematic viscosity 300 mm ² / s), Pearl Ream 24 (kinematic viscosity 800 mm ² / s) , Pearl Ream 46 (kinematic viscosity 4700 mm ² / s) (Nippon Yushi Co., Ltd.). The kinematic viscosity here is measured based on the crude oil and petroleum product-kinematic viscosity test method and viscosity index calculation method described in JIS-K-2283.

The amount of the component in the oil-in-water emulsified cosmetic composition of the present invention (A) is 1 to 30 mass% (hereinafter, abbreviated as "%" in the unit), and 3% to 15% is more preferable. When component (A) is blended in this range, an oil-in-water emulsified cosmetic with a better effect of imparting elasticity to the skin and improving elasticity can be obtained.

  The component (B) isotridecyl isononanoate used in the oil-in-water emulsified cosmetic of the present invention is an ester of isotridecyl alcohol and isononanoic acid, and is a liquid oil at 25 ° C. The component (B) is blended for the purpose of not only reducing stickiness but also increasing the compatibility with the highly viscous oil and improving the emulsion stability. Examples of commercially available products include Kurodamol TN (manufactured by Croda).

The amount of component (B) in the oil-in-water emulsified cosmetic composition of the present invention is 0.5 to 15%. When component (B) is blended in this range, an oil-in-water emulsified cosmetic with no stickiness and excellent emulsification stability can be obtained.

Moreover, it is preferable that the compounding mass ratio of a component (A) and a component (B) is (A) / (B) = 0.1-20. Within this range, an oil-in-water emulsified cosmetic that has no stickiness, gives skin firmness, improves elasticity, and is excellent in emulsion stability is obtained.

In the oil-in-water emulsified cosmetic of the present invention, the component (C) polyethylene glycol is contained for the purpose of imparting firmness to the skin and improving elasticity, and has an average molecular weight of 20,000 to 50,000. or less, giving firmness to the skin when formulated in this range, it is the effect of improving the elasticity obtain better oil-in-water type emulsified cosmetic. Here, the average molecular weight is a value determined by the method described in the Cosmetic Raw Material Standard Second Edition. Examples of such commercially available components (C) include polyethylene glycol 20000 (manufactured by NOF Corporation).

The amount of component (C) of the present invention is 0.01% to 5%. When component (C) is blended in this range, an oil-in-water emulsified cosmetic with a better effect of imparting elasticity to the skin and improving elasticity can be obtained.

  The oil-in-water emulsified cosmetic of the present invention contains water as an essential component in addition to the above components.

  In the oil-in-water emulsified cosmetic of the present invention, a surfactant can be blended as an emulsifier in addition to the above components. Such surfactants are used for the purpose of dispersants, feel control agents, etc., and are glycerin fatty acid esters and alkylene glycol adducts thereof, polyglycerin fatty acid esters and alkylene glycol adducts thereof, propylene glycol fatty acid esters and Nonionics such as alkylene glycol adducts, sorbitan fatty acid esters and alkylene glycol adducts thereof, fatty acid esters of sorbitol and alkylene glycol adducts thereof, polyalkylene glycol fatty acid esters, polyoxyalkylene-modified silicones, polyoxyalkylene alkyl co-modified silicones, etc. Surfactants, alkylbenzene sulfates, alkyl sulfonates, α-olefin sulfonates, dialkyl sulfosuccinates, α-sulfonated fats Fatty acid salt, acylmethyl taurine salt, N-methyl-N-alkyl taurine salt, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl phenyl ether sulfate, alkyl phosphate, polyoxyethylene alkyl ether phosphate, polyoxy Anionic surfactants such as ethylene alkylphenyl ether phosphate, N-acyl amino acid salt, N-acyl-N-alkyl amino acid salt, alkylamine salt, polyamine and alkanoylamine fatty acid derivative, alkylammonium salt, alicyclic Cationic surfactants such as ammonium salts, amphoteric surfactants such as lecithin, N, N-dimethyl-N-alkyl-N-carboxymethylammonium betaine, and the like are used, and these are used singly or in combination. be able to.

In addition to the above components, the oil-in-water emulsified cosmetic of the present invention has an oil agent other than component (A) and component (B) for the purpose of adjusting the feel, improving adhesion to the skin, improving makeup sustainability, etc. Can be blended. As such an oil agent, any oil can be used as long as it is usually used in cosmetics. For example, paraffin wax, ceresin wax, ozokerite, microcrystalline wax, montan wax, fisher trops wax, polyethylene wax, liquid paraffin, Natural waxes such as squalane, petrolatum, carnauba wax, beeswax, lanolin wax, candelilla wax, glyceryl tribehenate, pentaerythritol ester of rosin acid, jojoba oil, isononyl isononanoate, cetyl isooctanoate, isopropyl myristate, glyceryl trioctanoate, Esters such as neopentyl glycol dicaprate, diglyceryl triisostearate, dipentaerythritol fatty acid ester, stearic acid, behenic acid, 1 -Fatty acids such as hydroxystearic acid, higher alcohols such as cetanol, stearyl alcohol, and behenyl alcohol, oils and fats such as olive oil, castor oil, mink oil, and owl, lanolin derivatives such as lanolin fatty acid isopropyl and lanolin alcohol, N-laureuil Amino acid derivatives such as L-glutamic acid di (cholesteryl / behenyl / octyldodecyl), fluorine-based oils such as perfluoropolyether, perfluorodecane, and perfluorooctane, and the like are used. One or more of these are used. be able to. Of these, isononyl isononanoate, cetyl isooctanoate, glyceryl trioctanoate, and neopentyl glycol dicaprate can make the effects of the present invention more remarkable. When oils other than component (A) and component (B) are blended in the range of 1 to 40%, oil-in-water emulsified cosmetics are particularly effective in imparting elasticity to the skin and improving elasticity, and also in excellent emulsion stability. Can be obtained.

  In addition to the above components, the oil-in-water emulsified cosmetic of the present invention may contain a powder, an oil gelling agent, an ultraviolet absorber, and a water-soluble polymer.

  The form of the oil-in-water emulsified cosmetic of the present invention is not particularly limited, and is a liquid, emulsion, cream, eye cream, cosmetic liquid, pack, etc., basic cosmetics for face, limbs, body, foundation, eye shadow, eyeliner Makeup cosmetics such as Among them, eye creams and packs are the most effective cosmetics because they are easy to feel firmness.

  Hereinafter, the present invention will be described in more detail with reference to examples. Note that these do not limit the present invention.

Invention products 1 to 8 and comparative products 1 to 5: eye creams Eye creams having the compositions shown in Tables 1 and 2 were prepared by the following production methods, and "Emulsification stability", "Usage feeling (cone, elasticity, no stickiness" ) "Was evaluated and determined by the following evaluation methods and criteria, and the results are shown in Table 1 and Table 2.

(Production method)
a: Components 1 to 9 are heated to 80 ° C. and mixed.
b: Components 10 to 19 are heated to 80 ° C., added to a and emulsified.
c: This was cooled to 35 ° C. to obtain an eye cream.

[Evaluation Method 1]: Emulsification Stability Compared the viscosity measurement value of the sample after storage for 1 month in a constant temperature bath at 40 ° C. with the viscosity measurement value of the sample after storage for 1 month in a constant temperature bath at 15 ° C. The viscosity change was determined according to the following criteria.
Judgment criteria:
[Average score]: [Judgment]
Viscosity change is less than 5%: ◎
Viscosity change from 5% to less than 15%: ○
Viscosity change is 15% or more and less than 30%: Δ
Viscosity change is 30% or more: ×

[Evaluation method 2]: Usability (harness, elasticity, non-stickiness)
Applying about 3 g of the above-mentioned invention and comparative eye creams to 20 cosmetic panel specialists, and evaluating the feeling of use at that time (harness, elasticity, non-stickiness) according to the following evaluation criteria A score was assigned to each eye cream, and the average score of all panels was determined according to the following criteria.
Evaluation criteria:
[Evaluation Result]: [Score]
Very good: 5 points Good: 4 points Normal: 3 points Somewhat bad: 2 points Bad: 1 point Criteria:
[Average score]: [Judgment]
4.5 or more: ◎
3.5 or more and less than 4.5: ○
1.5 or more and less than 3.5: △
Less than 1.5: ×

  As is clear from the results of Tables 1 and 2, the eye creams of the inventive products 1 to 7 of the present invention are excellent in all items of “emulsification stability” and “use feeling (harness, elasticity, non-stickiness)”. It was an oil-in-water emulsified cosmetic. On the other hand, the comparative product 1 in which the component (A) was not blended and the comparative product 3 in which the component (C) was not blended were inferior in “use feeling (harness, elasticity)”. Moreover, in the comparative product 2 which does not mix | blend a component (B), it was inferior to "emulsification stability" and "use feeling (no stickiness)." Further, Comparative Product 4 in which component (B) was replaced with liquid paraffin was inferior in “emulsification stability” and “use feeling (no stickiness)”. Comparative product 5 in which component (C) was replaced with polyvinylpyrrolidone was inferior in “use feeling (harness, elasticity)”.

Body lift-up cream (ingredients) (%)
1.
Polyethylene glycol monostearate 2.0
2.
Microcrystalline wax 5.0
3.
Cetostearyl alcohol 2.0
4).
Vaseline 5.0
5.
Glyceryl tri-2-ethylhexanoate 3.0
6).
Isotridecyl isononanoate 8.0
7).
Polybutene (kinematic viscosity 3804 mm ² / s) (Note 1) 15.0
8).
1,3-butylene glycol 13.0
9.
Polyethylene glycol (molecular weight 20000) 1.0
10. Preservative appropriate amount11. Purified water remaining amount (Note 1) Polybutene 2000H food additive (Idemitsu Kosan Co., Ltd.)

(Production method)
a: Components 1 to 7 are heated to 80 ° C. and mixed and dissolved.
b: Components 8 to 11 are heated to 80 ° C. and added to a to emulsify.
c: B was cooled to 35 ° C. to obtain a body lift-up cream.

  The body lift-up cream of Example 2 obtained as described above was an oil-in-water emulsified cosmetic excellent in stability over time and feeling in use (cone, elasticity, and non-stickiness).

Oil-in-water emulsion (component) (%)
1. Polyoxyethylene (60) hydrogenated castor oil 0.5
2. Ethanol 10.0
3. Polyethylene glycol monostearate 2.0
4). Isotridecyl isononanoate 8.0
5. Cetostearyl alcohol 2.0
6). Heavy fluid isoparaffin (kinematic viscosity 4700mm ² / s) (Note 2) 5.0
7). Fragrance 0.01
8). Glycerin 3.0
9. Polyethylene glycol (molecular weight 50000) 1.0
10. Dipropylene glycol 4.0
11. Purified water remaining amount 12. Preservative appropriate amount (Note 2) Pearl Ream 46 (manufactured by NOF Corporation)

(Production method)
a: Components 1 to 7 are heated to 80 ° C. and mixed and dissolved.
b: Components 8 to 12 are heated to 80 ° C. and mixed and dissolved.
c: a is added to b and emulsified to obtain an oil-in-water emulsion.

The oil-in-water emulsion of Example 3 obtained as described above was an oil-in-water emulsified cosmetic excellent in stability with time and feeling of use (cone, elasticity, non-stickiness).

Claims (2)

The following components (A) to (C);
(A) Polybutene or heavy liquid isoparaffin having a kinematic viscosity at 100 ° C. of 300 to 5000 mm ² / s: 1 to 30% by mass
(B) Isotridecyl isononanoate : 0.5 to 15% by mass
(C) Polyethylene glycol having an average molecular weight of 20000 to 50000 : 0.01 to 5% by mass
An oil-in-water emulsified cosmetic comprising the following: Components (A) and (B) mixing mass ratio of (A) / (B) is oil-in-water emulsified cosmetic composition according to claim 1, characterized in that 0.1 to 20.