JP2003104860A - Emulsified composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an emulsified composition affording a silky feeling in use when applied onto the skin, having high moisturizing effect and safety and also flow stability with time. SOLUTION: This emulsified composition is obtained by compounding a combination of at least one component selected from polymethacryloyloxyethyl phosphorylcholine and 2-methacryloyloxyethyl phosphorylcholine/butyl methacrylate copolymer with an anionic thickening agent, a >=22C higher alcohol and a polyhydric alcohol.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an emulsified composition which has a deep feeling of use when applied to the skin, has a high moisturizing effect, is excellent in safety, and is excellent in flow stability over time. is there.

[0002]

2. Description of the Related Art Emulsion compositions for cosmetics must be emulsified during the production process to form an emulsion which is a dispersion system of water and oil. As the emulsifier to be added to the emulsified composition for the purpose of emulsification, various surfactants are currently generally used. As a selection criterion for using this surfactant as an emulsifier, it is needless to say that it is desirable to have an excellent emulsifying power, but it is necessary to use a surfactant having a safety that can sufficiently ensure the safety of the user. Is essential. Therefore, a surfactant having excellent emulsifying power and safety is currently blended as an emulsifier in the emulsion composition.

In order to further pursue safety, an attempt to make a stable emulsion composition by thickening with an anionic polymer and reducing the amount of surfactant, for example, thickening with carboxyvinyl polymer, and low amount of surfactant. However, attempts have been made to achieve stable emulsification.

[0004] In order to pursue even higher safety, an attempt is made to emulsify without compounding a surfactant, for example, instead of compounding a surfactant, the safety is high and the emulsifying power is high. Attempts to emulsify by adding the specific alkyl-modified carboxyvinyl polymer to the emulsified composition have been made at present (JP-A-8-21762).
4, JP-A-8-217627). However, with these means, the moisturizing power is still poor, and it is difficult to give a rich feeling in terms of sensory feeling.

Further, a homopolymer of 2-methacryloyloxyethylphosphorylcholine (hereinafter abbreviated as MPC) or a copolymer of MPC and a hydrophilic monomer or a hydrophobic monomer has a moisturizing effect on the skin and It is known that it shows a rough skin improving effect and can be used as a cosmetic (JP-A-5-70321 and JP-A-157269). Further, it is known that a stable multi-layer emulsion composition can be obtained by using a homopolymer of MPC, which is suitable for cosmetics and the like (JP-A-10-45525). Also, MPC
It has been disclosed that a copolymer of a monomer and a hydrophobic monomer can be used as a solubilizer, an emulsifier, and a dispersant (Japanese Patent Application Laid-Open No. H10 (1998) -107242).
-109029).

However, a homopolymer of MPC, or M
A copolymer of PC and a hydrophilic monomer or a hydrophobic monomer alone was not particularly sufficient as an emulsifier.

Further, when an anionic thickener and a copolymer of an MPC homopolymer or a hydrophobic monomer are combined, gelation occurs to easily solidify, and an emulsion or a beauty essence which requires a particular fluidity is produced. It was extremely difficult.

[0008]

DISCLOSURE OF THE INVENTION The present invention relates to an emulsified composition which has a poor feeling in use when applied to the skin, has a high moisturizing effect, is excellent in safety, and is excellent in fluidity over time. Is.

[0009]

Under the circumstances, as a result of intensive studies by the present inventors, one or two selected from polymethacryloyloxyethylphosphorylcholine or 2-methacryloyloxyethylphosphorylcholine / butyl methacrylate copolymer. A cosmetic containing a combination of one or more of the above, an anionic thickener, a higher alcohol having 22 or more carbon atoms, and a polyhydric alcohol has a deep feeling of use when applied to the skin, and has a high moisturizing effect and rough skin. Finding an effect that is excellent in improving effect and excellent in fluidity over time,
The present invention has been completed.

That is, the present invention has a strong feeling of use when applied to the skin, a high moisturizing effect, and excellent safety,
And is an emulsion composition having excellent fluidity over time, one or more selected from polymethacryloyloxyethylphosphorylcholine or 2-methacryloyloxyethylphosphorylcholine-butyl methacrylate copolymer, anionic thickener, carbon number An emulsion composition was prepared by combining 22 or more higher alcohols and polyhydric alcohols in combination.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. The polymethacryloyloxyethylphosphorylcholine or the 2-methacryloyloxyethylphosphorylcholine / butyl methacrylate copolymer used in the present invention is commercially available as Lipidure-HM and Lip.
idea-HM-500, Lipide-PMB
Those manufactured by Nippon Oil & Fats Co., Ltd. are available.

The amount of polymethacryloyloxyethylphosphorylcholine or 2-methacryloyloxyethylphosphorylcholine / butyl methacrylate copolymer in cosmetics is usually 0.001 to 10.0% by weight, preferably 0.005 to 5%. It is 0.0% by weight. Compounding amount 0.00
If it is less than 1% by weight, the effect is not sufficient, and 10.0
If it is blended in an amount of more than wt.%, It has sliminess and stickiness, and the feel is poor.

The anionic polymer used in the present invention is a carboxyvinyl polymer, an alkyl-modified carboxyvinyl polymer (for example, Hibiswako (manufactured by Wako Pure Chemical Industries, Ltd.), Carbopol 980, PEMUREN TR-).
1, PEMUREN TR-2 (both BFGoodr
ich)), polyacrylic acid (for example, Aron (Toagosei Co., Ltd.), sodium polyacrylate (for example, Aronbis (Nippon Paper Manufacturing Co., Ltd.)), carboxymethyl cellulose (for example, Sunrose (Nippon Paper Manufacturing)). , CMC
Daicel (manufactured by Daicel Chemical Industries, Ltd.), carrageenan (eg, carrageenin (San-Ei Gen FFI Co., Ltd.)
Manufactured), and these may be used alone or in combination of two or more. It is particularly preferable to use a carboxyvinyl polymer or an alkyl-modified carboxyvinyl polymer.

The amount of the anionic thickener blended is 0.001 to
It is 3% by mass, preferably 0.005 to 2.5% by mass, and more preferably 0.01 to 2% by mass. 0.
If it is less than 001% by mass, a sufficient thickening effect cannot be obtained and the stability over time is poor. If it exceeds 3% by mass, the sticky feeling may be increased or the fluidity may be affected.

Examples of the higher alcohol as the component (C) include behenyl alcohol and ceryl alcohol. Behenyl alcohol is particularly preferable.

Examples of the polyhydric alcohol as the component (D) include glycerin and propylene glycol. In particular, it is preferable to mix one or more selected from dihydric alcohols having 4 to 8 carbon atoms, specifically, for example, 3-methyl-1,3-butanediol, 1,3-
Butylene glycol, 1,2-pentanediol, 1,
3-pentanediol, 1,2-hexanediol,
1,3-hexanediol, 1,2-heptanol,
1,3-heptanol, 1,2-octanol, 1,3
-Octanol and the like. Of these, dihydric alcohols having 5 to 6 carbon atoms are particularly preferable.

The above dihydric alcohol is contained in the composition in an amount of 0.00
1 to 15% by mass, particularly 0.01 to 15% by mass, and further 0.1.
It is preferable to add 1 to 10% by mass because more sufficient prevention and improvement effects of rough skin can be obtained.

The cosmetics of the present invention are used in basic cosmetics such as lotions, milky lotions, beauty essences, creams, make-up cosmetics such as lipsticks and foundations, hair cleansing agents, and hair cosmetics such as hair restorers. Although it is not limited thereto, it is preferably used as an emulsion or a beauty essence.

In the cosmetic of the present invention, other components usually used in addition to the above-mentioned essential components can be appropriately blended within a range that does not impair the effects of the present invention, and are produced by a conventional method.

For example, avocado oil, corn oil, olive oil, rapeseed oil, castor oil, sunflower oil, rice bran oil, jojoba oil, cacao oil, coconut oil, squalane, squalene, beef tallow, mokuro, beeswax, candelilla wax,
Carnauba wax, spermaceti, lanolin, silicone oil, fluorine oil, liquid paraffin, ceresin, petrolatum, polyoxyethylene (8 mol) oleyl alcohol ether, oils such as glyceryl monooleate, sterols such as cholesterol and phytosterol, lauric acid, myristin Acids, palmitic acid, stearic acid, behenic acid, lanolin fatty acids, higher fatty acids such as linoleic acid, para-aminobenzoic acid, homomenthyl-7N-acetylalanthranilate, butylmethoxybenzoylmethane, di-paramethoxycinnamic acid-mono-2 -Glyceryl ethylhexanoate,
Amyl salicylate, octyl cinnamate, 2,4-
UV absorbers such as dihydroxybenzophenone, moisturizers such as polyethylene glycol, glycerin, sorbitol, xylitol, maltitol, trehalose, polyvinyl alcohol, thickeners such as methyl cellulose, ethyl cellulose, gum arabic, laponite, xanthan gum, and organic such as ethanol. Solvents, benzoic acid, salicylic acid, sorbic acid, paraoxybenzoic acid alkyl ester, antibacterial preservatives such as hexachlorophene, glycine, alanine, leucine, serine, phenylalanine, tyrosine, aspartic acid, asparagine, glutamine, taurine, arginine, histidine, etc. Amino acids and their alkali metal salts and hydrochlorides, organic acids such as acyl sarcosinic acid, glutathione, malic acid and tartaric acid, vitamin A and its derivatives, vitamin Emissions B6 hydrochloride, vitamin B6 tripalmitate, vitamin B6 dioctanoate, vitamin B2 and its derivatives, vitamin B12, vitamin B1
Vitamin Bs such as 5 and its derivatives, ascorbic acid and its derivatives, vitamin E and its derivatives, vitamin D
, Vitamins H, pantothenic acid, vitamins such as pantethine, various drugs such as nicotinamide, benzyl nicotinate, γ-oryzanol, bisabolol, pantothenyl ethyl ether, ethinyl estradiol, placenta extract, sorbitan fatty acid ester polyoxyethylene sorbitan Fatty acid ester, polyethylene glycol monooleate, polyoxyethylene alkyl ether,
Polyglycol diether, lauroyl diethanol amide, fatty acid isopropanol amide, maltitol hydroxy fatty acid ether, alkylated polysaccharide, alkyl glucoside, nonionic surfactant such as sugar ester, stearyl trimethyl ammonium chloride,
Cationic surfactants such as benzalkonium chloride and laurylamine oxide, sodium palmitate, sodium laurate, sodium lauryl sulfate, potassium lauryl sulfate, alkylsulfuric acid triethanolamine ether, linear dodecylbenzenesulfate, polyoxyethylene curing castor Oil maleic acid, anionic surfactants such as acylmethyl taurine, amphoteric surfactants, titanium dioxide,
Powdered components such as mica, talc, etc., any one or more selected from pigments, fragrances, and purified water are mixed with the above-mentioned essential components and produced by a conventional method depending on the intended dosage form of the cosmetic. You can

[0021]

EXAMPLES The present invention will be described in detail below based on examples and comparative examples. Further, the rough skin improving effect test and the sensory test used in the present invention are as follows.

[Rough skin improving effect test] [0026] 10 middle-aged and elderly subjects having rough skin on the lower legs were applied continuously for 4 weeks,
The effect was evaluated. That is, about 0.5 g of the sample was applied once a day to the test site on the outside of the left lower leg of the subject, and the skin condition before the start of the test and after the end of the test was evaluated according to the criteria in Table 1. The lower right leg served as a control without applying the sample.

[0023]

[Table 1]

By comparing the judgment results of the test site before and after the test and the control site, it is effective when the skin dryness is improved by two steps or more, and is effective when the skin dryness is improved by one step, and is invalid when there is no change. did. The test results were valid, and the number of subjects who became valid was examined, and the results were judged according to the following criteria.

[0025]

[Table 2]

[Sensory Test] An emulsion composition having the composition shown in Table 3 was prepared and used by 10 female panels on the skin after washing, and the feeling of use was evaluated according to the following criteria. (Evaluation criteria of feeling of use) ・ Moisture effect ◎: 80% or more of the panelists evaluated that it was moisturized. ◯: It was evaluated that 50% or more and less than 80% of the panelists were moist. Δ: It was evaluated that 30% or more and less than 50% of the panelists were moist. X: It was evaluated that less than 30% of the panelists were moist. -Emulsion composition rich ◎: 80% or more of the panelists evaluated that there was richness. ◯: 50% or more and less than 80% of the panelists evaluated that there was darkness. (Triangle | delta): 30% or more and less than 50% of the panelists evaluated that there was darkness. X: Less than 30% of the panelists evaluated that there was a thick body.

[Fluidity test] An emulsion composition having the composition shown in Table 3 was prepared, and a standard screw tube bottle (outer diameter: 35 m) was prepared.
m, inner diameter 20 mm, height 78 mm, inner volume 50 ml,
NO. After filling 40 ml in 7) and leaving it at 20 ° C. for 1 month,
Whether the fluidity of the emulsified composition was maintained was judged according to the following criteria. ⊚: The emulsion composition comes out within 5 seconds when tilted horizontally. X: The emulsified composition does not come out within 5 seconds when tilted horizontally.

[0028]

[Table 3]

From the results, based on Example 1, Comparative Examples 1 and 2 in which behenyl alcohol was replaced by another higher alcohol, Comparative Examples 3 and 2-methacryloyloxy in which an anionic thickener was not mixed were prepared. Compared with Comparative Example 4 in which the ethylphosphorylcholine / butyl methacrylate copolymer was not blended, Example 1 had a rough skin improving effect,
It was shown to be excellent in terms of moisturizing effect, body, and fluidity.

Further, Table 4 shows examples of the present invention.

[Table 4]

[0031]

Industrial Applicability As described above, the present invention provides an emulsified composition having a good feeling when used on the skin, a high moisturizing effect, an excellent safety and an excellent flow stability over time. Can be provided.

Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C08L 33/14 C08L 33/14 101/08 101/08 F term (reference) 4C083 AB032 AC022 AC061 AC072 AC112 AC122 AC242 AC342 AC392 AC422 AC442 AD091 AD092 AD532 CC04 CC05 DD31 EE01 EE06 EE10 EE12 4J002 AB01X AB05X BG01X BG07W EC047 EC057 EC066 GB00 HA05

Claims (7)

[Claims] 1. One or more selected from (A) polymethacryloyloxyethylphosphorylcholine or 2-methacryloyloxyethylphosphorylcholine / butyl methacrylate copolymer (B) anionic thickener (C) having 22 carbon atoms. An emulsified composition comprising the above-mentioned higher alcohol (D) polyhydric alcohol. 2. An emulsion composition, wherein the component (B) of claim 1 is one or more selected from alkyl-modified carboxyvinyl polymers and carboxyvinyl polymers. 3. An emulsified composition, wherein the component (C) according to claim 1 or 2 is behenyl alcohol. 4. The component (D) according to any one of claims 1 to 3 has 4 carbon atoms.
1 to 2 or more selected from the dihydric alcohols of No. 8 to 8. 5. The amount of the emulsified composition according to any one of claims 1 to 4 is (A) 0.001 to 10.0 mass% and (B), respectively.
0.001 to 3.0% by mass, (C) 0.1 to 3.0% by mass, and (D) 0.001 to 15% by mass, an emulsified composition. 6. An emulsion composition, wherein the emulsion composition according to any one of claims 1 to 5 is an emulsion or a beauty essence. 7. The method according to claim 1, which contains substantially no surfactant.
To 6 emulsified compositions.