JP2003034615A - Pack cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pack cosmetic having a good usability (ease of use and a moisturizing effect). SOLUTION: The pack cosmetic contains a thickening agent of an alkali- soluble emulsified polymer, salts and/or amino acids and water-soluble derivatives thereof having a moisturizing effect, and a moisturizer of a water-soluble polyhydric alcohol having more than two hydroxyl groups within the molecule. The alkali-soluble emulsified polymer is further characterized by that it is a copolymer of (A) acrylic acid and/or methacrylic acid, (B) one or more selected from alkyl acrylic ester and/or alkyl methacrylic ester, and (C) an ester of polyoxyalkylene monoalkyl ether and acrylic acid or ester of polyoxyalkylene monoalkyl ether and methacrylic acid.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention has excellent usability and use even when a salt having moisture retention property or a water-soluble polyhydric alcohol is added by adding a specific alkali-soluble emulsion polymer thickener. The present invention relates to a pack cosmetic having a feeling.

[0002]

2. Description of the Related Art Conventionally, pack cosmetics containing a large amount of moisturizing ingredients have been used in order to supply a sufficient moisturizing ingredient to the skin. In addition, as a method of using the pack cosmetic, it has been practiced to remove it after applying it to the skin or to use it as it is. Such pack cosmetics are
The need arises to remain on the skin for a period of time to allow the moisturizer to penetrate. For this reason, a water-soluble polymer is often blended so that it does not flow on the skin or fall off.

[0003]

However, water-soluble polyhydric alcohols, sugars and highly moisturizing salts, amino acids and their derivatives, which are generally used as moisturizers in pack cosmetics, have a strong influence on the state of the water system. For this reason, when a large amount is blended, the properties of the water-soluble polymer are greatly changed, and the viscosity is lowered, which may impair the function and usability as a pack cosmetic. In addition, when the amount of the water-soluble polymer is increased to increase the viscosity, the elongation during use becomes heavy, and the water-soluble polymer causes stickiness after use, which adversely affects usability and feel. On the other hand, the transparency of the appearance is also an important factor for bringing a refreshing feeling and freshness to cosmetics. In particular, when such an appearance is embodied in a cosmetic containing a lot of moisturizing agents such as water-soluble polyhydric alcohols, sugars and highly moisturizing salts, amino acids and water-soluble derivatives thereof, water-soluble polymer In many cases, aggregation occurred and the appearance became cloudy. Therefore, water-soluble polyhydric alcohols, sugars and highly moisturizing salts,
It is desirable to develop pack cosmetics that contain a lot of moisturizers such as amino acids and their derivatives, spread well and spread on the skin, have excellent usability such as adhesion to the skin, and have excellent moisturizing feeling. It was rare.

[0004]

[Means for Solving the Problems] In view of such circumstances,
As a result of intensive studies to overcome the above drawbacks, the present inventors have found that an alkali-soluble emulsion polymer thickener, moisturizing salts and / or amino acids and water-soluble derivatives thereof, and water-soluble polyhydric alcohols. It has been found that the above-mentioned problems can be solved by blending with a system moisturizer, and the present invention has been completed based on this finding.

That is, the present invention relates to an alkali-soluble emulsion polymer thickener, a moisturizing salt and / or amino acid and a water-soluble derivative thereof, and a water-soluble polyvalent compound having two or more hydroxyl groups in the molecule. A pack cosmetic comprising an alcohol-based moisturizer as an essential component.
Further, the alkali-soluble emulsion polymer thickener has the following (A),
The pack cosmetics are characterized in that they are the copolymers of (B) and (C). (A) Acrylic acid and / or methacrylic acid (B) Acrylic acid alkyl ester and / or one or more kinds selected from methacrylic acid alkyl ester (C) Ester of polyoxyalkylene monoalkyl ether and acrylic acid, or The ester of polyoxyalkylene monoalkyl ether and methacrylic acid is more preferable, and the compounding ratio of the alkali-soluble polymer thickener and the moisturizing salt and / or amino acid and its water-soluble derivative is 1 as the mass ratio of the solid content. / 10 to 5
It is a pack cosmetic that is 0/1. More preferably, it is a pack cosmetic having a transparent appearance.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The structure of the present invention will be described below. The alkali-soluble emulsion polymer thickener used in the present invention imparts excellent usability with little change in viscosity even when a large amount of moisturizing salt or water-soluble polyhydric alcohol is blended in the pack cosmetic. , Is an essential component for giving a more transparent appearance.

The alkali-soluble emulsion polymer thickener used in the present invention is a low-viscosity polymer aqueous dispersion itself, and is a cloudy to slightly cloudy liquid called a polymer emulsion. This product thickens and becomes transparent when an alkali agent is added. The alkali-soluble emulsion polymer thickener used in the present invention can be used without particular limitation as long as it is transparent and thickened by the addition of an alkali agent as described above, but if it is specifically illustrated. , A polymer emulsion containing a copolymer of acrylic acid and an alkyl acrylate as a polymer component, a polymer emulsion containing a copolymer of acrylic acid and an alkyl methacrylate as a polymer component, acrylic acid, an alkyl acrylate and an alkyl methacrylate Polymer emulsion containing a copolymer of ester as a polymer component, polymer emulsion containing a copolymer of acrylic acid, methacrylic acid and alkyl acrylate as a polymer component, acrylic acid, alkyl acrylate and polyethylene glycol ester acrylate Polymer Polymer emulsion containing a polymer component, a polymer emulsion containing acrylic acid, a methacrylic acid alkyl ester and a copolymer of acrylic acid (polyoxyethylene monoalkyl ether) ester as a polymer component, acrylic acid, a methacrylic acid alkyl ester and a methacrylic acid (polyester). Oxyethylene monoalkyl ether) ester copolymer emulsion polymer, itaconic acid, acrylic acid alkyl ester and methacrylic acid (polyoxyethylene monoalkyl ether)
The polymer emulsion having a copolymer of ester as a polymer component, the polymer emulsion having a copolymer of acrylic acid, an alkyl acrylate ester and an itaconic acid (polyoxyethylene monoalkyl ether) ester as a polymer component can be exemplified. Then, these 1 type (s) or 2 or more types can be used.

Among these, in order to obtain the excellent usability and transparent appearance which are the effects of the present invention, the alkali-soluble emulsion polymer thickener is a polymer of the following three-component copolymer. It is preferably a polymer emulsion to be used. (A) Acrylic acid and / or methacrylic acid (B) Acrylic acid alkyl ester and / or one or more kinds selected from methacrylic acid alkyl ester (C) Ester of polyoxyalkylene monoalkyl ether and acrylic acid, or Ester of polyoxyalkylene monoalkyl ether and methacrylic acid

The copolymer obtained by copolymerizing the above-mentioned three kinds of components is ICID (International Co
smectic Indigenous Diction
ary) listed acrylate / cetes-20 methacrylate copolymer (ACRYLATES / CETETH-
20 METHACRYLATE COPOLYME
R), acrylate / stearless-50 acrylate copolymer (ACRYLATES / STEARETH-50
ACRYLATE COPOLYMER), acrylate / stearless-20 methacrylate copolymer (AC
RYLATES / STEARETH-20 METHA
CRYLATE COPOLYMER), acrylate / behenes-25 methacrylate copolymer (ACRYL
ATES / BEHENETH-25 METHACRY
LATE COPOLYMER) and the like, and in the form of a polymer emulsion, commercially available products such as Aculin 22 and Aculin 28 (all manufactured by Rohm & Haas Co.)
It is specifically exemplified and can be suitably used for the product of the present invention. Further, although it is not a copolymer of (A), (B), and (C) described above, ICID (International Cosm)
etic Ingredient Dictionar
y) Listed acrylate / steareth-20 itaconic acid copolymer (ACRYLATES / STEARETH-2
0 ITACONATE COPOLYMER), acrylate / cetes-20 itaconic acid copolymer (ACRY
LATES / CETETH-20 ITACONATE
Copolymers such as COPOLYMER) are also preferred as the alkali-soluble emulsion polymer thickener of the present invention. Such a copolymer has a STR in the form of a polymer emulsion.
Commercially available products such as UCTURE 3001 (manufactured by National Starch) are specifically exemplified and can be suitably used for the product of the present invention.

The solid content of the alkali-soluble emulsion polymer thickener used in the present invention is not particularly limited, but preferably 0.1 to 3% by mass (hereinafter, simply referred to as "%").

The alkali-soluble emulsion polymer thickener is added by adding an inorganic basic substance such as sodium hydroxide or potassium hydroxide or an organic basic substance such as triethanolamine, isopropanolamine or arginine to the p
The viscosity can be increased by setting it to H7 or more.

The moisturizing salts and / or amino acids and their water-soluble derivatives used in the present invention are essential components for imparting an excellent moisturizing effect. In addition, the moisturizing effect is synergistically improved by using together with a water-soluble polyhydric alcohol moisturizer having two or more hydroxyl groups in the molecule.

The moisturizing salts used in the present invention are
Specific examples thereof include, but are not limited to, hydroxyacetic acid, lactic acid, β-hydroxypropionic acid, α-hydroxybutyric acid, α-hydroxyisobutyric acid, α-hydroxyisocaproic acid, oxalic acid, malonic acid, succinic acid, and glutaric acid. , Adipic acid, pimelic acid, suberic acid, azelaic acid, fumaric acid, maleic acid, malic acid, tartronic acid,
Examples thereof include sodium salts, potassium salts, triethanolamine salts, ammonium salts and the like of citric acid, tartaric acid, pyrrolidonecarboxylic acid and the like. These may be used alone or in combination of two or more, if necessary.
Among these, sodium lactate, sodium pyrrolidonecarboxylate, sodium malate, and sodium citrate are preferable in order to obtain more excellent moisturizing properties.

The amino acids and their water-soluble derivatives used in the present invention are not particularly limited, but specific examples include glycine, alanine, valine, leucine, isoleucine, phenylalanine, tyrosine, threonine, serine, proline and hydroxyproline. , Tryptophan,
Examples thereof include amino acids such as thyroxine, methionine, cystine, cystine, aspartic acid, glutamic acid, asparagine, glutamine, lysine, arginine and histidine, and water-soluble derivatives of amino acids such as trimethylglycine and N-acetyl-glutamic acid. They are,
If necessary, one kind or a combination of two or more kinds can be used. Among these, serine, trimethylglycine, and N-acetyl-glutamic acid are preferable in order to obtain more excellent moisturizing properties.

The amount of the moisturizing salt and / or amino acid and its water-soluble derivative used in the present invention is not particularly limited, but preferably 0.01 to 10
%.

The water-soluble polyhydric alcohol moisturizer having two or more hydroxyl groups in the molecule used in the present invention is an essential component for imparting an excellent moisturizing effect. When used in combination with moisturizing salts and / or amino acids and water-soluble derivatives thereof, the moisturizing effect is synergistically improved.

The water-soluble polyhydric alcohol-based humectant used in the present invention may be one having two or more hydroxyl groups in the molecule, and specifically, polypropylene glycol such as propylene glycol, dipropylene glycol and tripropylene glycol. , 1,3-butylene glycol,
Butylene glycol such as 1,4-butylene glycol, pentane diol such as 1,2-pentanediol and 1,3-pentanediol, and glycerin, diglycerin containing three or more hydroxyl groups in the molecule,
Triglycerin, polyglycerin such as tetraglycerin, maltose, maltitol, sucrose, fructose, mannitol, xylitol, sorbitol, maltotriose, slateol, erythritol, polyethylene glycol, and glucose derivatives such as polyoxyalkylene alkyl glycosides. To be These may be used alone or in combination of two or more, if necessary. Among these, glycerin, 1,3-butylene glycol, dipropylene glycol, sorbitol, mannitol, and polyoxyethylene methyl glucoside are preferable in order to obtain more excellent moisturizing properties.

The amount of the water-soluble polyhydric alcohol-based humectant having two or more hydroxyl groups in the molecule used in the present invention is not particularly limited, but is preferably 1 to 30%.

Further, in order to obtain more excellent usability and moisturizing effect, the compounding ratio of the alkali-soluble polymer thickener to the moisturizing salts and / or amino acids and their water-soluble derivatives is solid content. 1/10 to 50/1 as mass ratio
Is preferred. More preferably 1/2 to 20 /
It is 1.

Further, the appearance of the pack cosmetic of the present invention is preferably transparent for the purpose of giving a refreshing feeling, freshness and the like. The transparent appearance here means a wavelength of 60.
It shows that the transmittance at 0 nm is 70% or more.
(Measured with a spectrophotometer, and the transmittance of purified water is 100%)

In the pack cosmetic of the present invention, in addition to the above-mentioned essential components, if desired, a surfactant usually used in cosmetics,
Oil agents, polymers other than the above, powder, water, preservatives, colorants,
A cooling agent, a stabilizer, an alcohol, a drug, a fragrance and the like can be added as appropriate.

[0022]

EXAMPLES The present invention will be further described with reference to the following examples. These do not limit the present invention in any way.

Examples 1 to 7 and Comparative Examples 1 to 5: Pack cosmetics Pack cosmetics were prepared by the compositions shown in Tables 1 and 2 and the following production method. The obtained pack cosmetics were evaluated for (1) usability (ease of use) and (2) feeling of use (moisturizing feeling) by the following methods, and the results are also shown in Tables 1 and 2.

[0024]

[Table 1]

[0025]

[Table 2]

(Production method) Components 1 to 18 are uniformly mixed at room temperature.

(Evaluation method) Ten specialized panels were given (1)
With respect to usability (ease of use) and (2) feeling of use (moisturizing feeling), the following (a) evaluation criteria were used to evaluate 5 grades, and the average score of each sample was used (b) 4 grade judgment criteria It was judged.

[0028] (B) 4-step judgment standard (average value of scores): (judgment) 3.0 or more: ◎ 2.0 or more, less than 3.0: ○ 1.0 or more, less than 2.0: △ less than 1.0: ×

As is clear from the results shown in Tables 1 and 2,
Examples 1 to 7 according to the present invention have usability (ease of use),
The pack cosmetic had an excellent feeling of use (moisturizing feeling).

[0030]   Example 8: Transparent moisturizing pack material       (Component) (%) (1) Ethanol 10 (2) Polyoxyethylene (60) hydrogenated castor oil 0.1 (3) Perfume proper amount (4) 1,3-butylene glycol 10 (5) Dipropylene glycol 5 (6) Acrylate / Steareth-20 Methacrylate       Copolymer (30%) aqueous solution (Note 1) 5 (7) Sodium hydroxide suitable amount (8) Polyoxyethylene (10) methyl glucoside 2 (9) N-acetyl-L-glutamic acid 0.3 (10) Preservative suitable amount (11) Purified water Remaining amount Note 1. Akyrin 22 (made by Rohm & Haas)

(Production Method) A: Components (1) to (3) are uniformly mixed. B: Components (4) to (11) are mixed uniformly. C: A was added to B and mixed uniformly to obtain a transparent moisturizing pack material.

The transparent moisturizing pack material obtained in Example 8 was
The pack cosmetic was excellent in usability, easy to use, excellent in moisturizing feeling after use, and transparent in appearance.

[0033]   Example 9: Transparent moisturizing pack material       (Component) (%) (1) 1,3-butylene glycol 10 (2) Polyoxyethylene (60) hydrogenated castor oil 3 (3) Tri-2-ethylhexanoic acid glyceride 0.5 (4) Perfume proper amount (5) Glycerin 5 (6) 70% sorbitol aqueous solution 5 (7) Acrylate / Steares-20 Methacrylate       Copolymer (30%) aqueous solution (Note 1) 5 (8) Sodium hydroxide suitable amount (9) Sodium lactate (50%) aqueous solution 1 (10) L-serine 1 (11) Preservative suitable amount (12) Purified water Remaining amount Note 1. Akyrin 22 (made by Rohm & Haas)

(Production Method) A: Components (1) to (4) are uniformly mixed. B: Components (5) to (12) are uniformly mixed. C: A was added to B and mixed uniformly to obtain a transparent moisturizing pack material.

The transparent moisturizing pack material obtained in Example 9 was
The pack cosmetic was excellent in usability, easy to use, excellent in moisturizing feeling after use, and transparent in appearance.

[0036]

As described above, the pack cosmetic of the present invention has excellent usability (ease of use) and feeling of use (moisturizing effect), and has excellent quality as a pack cosmetic. Met.

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Claims (4)

[Claims] 1. An alkali-soluble emulsion polymer thickener, a moisturizing salt and / or amino acid and a water-soluble derivative thereof, and a water-soluble polyhydric alcohol moisturizer having two or more hydroxyl groups in the molecule. A pack cosmetic comprising: 2. The pack cosmetic according to claim 1, wherein the alkali-soluble emulsion polymer thickener is a copolymer of the following (A), (B) and (C). (A) Acrylic acid and / or methacrylic acid (B) Acrylic acid alkyl ester and / or one or more kinds selected from methacrylic acid alkyl ester (C) Ester of polyoxyalkylene monoalkyl ether and acrylic acid, or Ester of polyoxyalkylene monoalkyl ether and methacrylic acid 3. The mixing ratio of the alkali-soluble polymer thickener and the moisturizing salts and / or amino acids and their water-soluble derivatives is 1/10 to 50 as a mass ratio of solid content.
The pack cosmetic according to claim 1 or 2, which is / 1. 4. The pack cosmetic according to any one of claims 1 to 3, which has a transparent appearance.