Cosmetics containing cationic polymers

Abstract

To provide cosmetics having excellent usability (spreading, familiarity with the skin, smoothness after familiarization, and moisturizing feeling) without making users feel unpleasant feelings such as a peculiar film feeling, a squeaky feeling, and a sticky feeling peculiar to a moisturizer.SOLUTION: Provided is a cosmetic comprising a copolymer and a moisturizer. The copolymer comprises a structural unit (A) derived from 2-(dimethylamino) ethyl methacrylate and a structural unit (B) derived from ethyl methacrylate. In the copolymer, with respect to 100% by mass of the total structural unit, the ratio of the structural unit (A) is 50 to 95% by mass, the ratio of the structural unit (B) is 5 to 50% by mass, and the ratio of other monomer-derived structural units is less than 5% by mass. The copolymer has a weight average molecular weight of 20,000 to 50,000.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a cosmetic preparation containing a cationic polymer and having an excellent feel when used. [Background technology]

[0002] In order to keep cosmetics hygienic until the very end, it is effective to incorporate antibacterial agents and preservatives to prevent the proliferation of microorganisms in the cosmetics. However, it is known that many antibacterial agents and preservatives are highly irritating to the skin and remain on the skin, causing skin problems such as rough skin. Therefore, materials that combine antibacterial and preservative effects with safety for the skin are being developed.

[0003] Patent Document 1 (JP Patent Publication No. 2016-183116 A) discloses a cationic polymer with excellent antibacterial properties and safety. The copolymer of 2-(dimethylamino)ethyl methacrylate and ethyl methacrylate disclosed in Patent Document 1 (JP Patent Publication No. 2016-183116 A) certainly has excellent antibacterial properties and safety. However, when blended into cosmetics, there is an issue with the unique feel of the polymer, that is, the polymer has a strong filmy feel and squeaky feel, compared to a cosmetic ingredient commercially available under the same INCI name (acrylates / dimethylaminoethyl methacrylate) copolymer.

[0004] In order to suppress the filmy feel and squeaky feel peculiar to polymers and impart smoothness, attempts have been made to incorporate high molecular weight silicone. For example, Patent Document 2 (JP Patent Publication 8-92044 A) proposes an aerosol type hair cosmetic that contains a hair styling resin and high molecular weight silicone, and Patent Document 3 (JP Patent Publication 2010-53083 A) proposes an aerosol spray type hair styling composition that contains a film-forming polymer, high polymerization silicone, hydrocarbon oil, and higher alcohol.

[0005] One of the purposes of using cosmetics is to prevent the skin from drying, regulate the moisture on the skin surface, and give the skin a moist feeling. For this reason, various ingredients are added to cosmetics as moisturizers. Moisturizers that are commonly used include polyhydric alcohols such as glycerin, 1,3-butylene glycol, and sorbitol, as well as biological moisturizing ingredients such as amino acids, organic acids, and hyaluronic acid. These moisturizers provide moisturizing effects while also giving the skin an unpleasant sticky feel. For this reason, various techniques have been proposed to prevent the skin from feeling sticky when these moisturizers are added. It has also been pointed out that moisturizers can give unpleasant feelings such as a slimy feel in addition to a sticky feel. For example, Patent Document 4 (JP Patent Publication No. 2001-354510) discloses that when a large amount of a general moisturizer is blended into a topical composition, the resulting topical composition has excellent skin moisturizing effects but produces a sticky feel when used, whereas when a sugar alcohol having 4 to 6 carbon atoms is blended with silicone oil, the resulting oil-in-water topical composition has a superior moisturizing effect on the skin and does not produce a sticky feel when used, compared to a topical composition obtained by simply blending a general moisturizer or mucopolysaccharide.

[0006] Patent Document 5 (JP 2017-014120 A) discloses that blending tripropylene glycol with a cosmetic preparation containing a moisturizer such as glycerin, diglycerin, polyglycerin, 1,3-butylene glycol, sorbitol, maltitol, mannitol, and glucose results in an excellent cosmetic preparation that reduces unpleasant sensations during use, such as sticky and slimy sensations, caused by the moisturizer.

[0007] As a result of intensive research, the present inventors have found that by combining a copolymer of 2-(dimethylamino)ethyl methacrylate and ethyl methacrylate with a moisturizer, it is possible to obtain a cosmetic product with an excellent feel when used, without the filmy or squeaky feeling peculiar to the copolymer of 2-(dimethylamino)ethyl methacrylate and ethyl methacrylate, or the sticky or slimy feeling caused by the moisturizer, while maintaining the antibacterial properties and safety of the copolymer of 2-(dimethylamino)ethyl methacrylate and ethyl methacrylate, and have completed the present invention. The present invention proposes a new cosmetic product based on these findings. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2016-183116 A [Patent Document 2] Japanese Patent Application Publication No. 8-92044 [Patent Document 3] JP 2010-53083 A [Patent Document 4] JP 2001-354510 A [Patent Document 5] JP 2017-014120 A Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention relates to a polymerizable composition having a structural unit (A) derived from 2-(dimethylamino)ethyl methacrylate represented by the following general formula (1) and a structural unit (B) derived from ethyl methacrylate represented by the following general formula (2), the proportion of the structural unit (A) is 50 to 95 mass%, the proportion of the structural unit (B) is 5 to 50 mass%, and the proportion of structural units derived from other monomers is less than 5 mass%, relative to 100 mass% of all structural units; The objective of the present invention is to provide a cosmetic which is excellent in feel when used (spreadability, compatibility with the skin, smooth feel after compatibility, moisturizing feel) without giving unpleasant feel when used, such as filmy feel and squeaky feel peculiar to copolymers having a weight-average molecular weight of 20,000 to 50,000, and sticky feel peculiar to moisturizing agents.

[0010] [ka]

[0011] [ka] [Means for solving the problem]

[0012] The means for solving the problems of the present invention are as follows. 1. A polymer having a structural unit (A) derived from 2-(dimethylamino)ethyl methacrylate represented by the following general formula (1) and a structural unit (B) derived from ethyl methacrylate represented by the following general formula (2), the proportion of the structural unit (A) is 50 to 95 mass%, the proportion of the structural unit (B) is 5 to 50 mass%, and the proportion of structural units derived from other monomers is less than 5 mass%, relative to 100 mass% of all structural units; A cosmetic preparation comprising a copolymer having a weight-average molecular weight of 20,000 to 50,000 and a moisturizing agent.

[0013] [ka]

[0014] [ka] 2. The cosmetic composition according to 1., characterized in that the moisturizing agent according to 1. contains one or more selected from polyhydric alcohols, sugar alcohols and sugars. 3. A cosmetic composition according to 1. or 2., characterized in that the moisturizing agent according to 1. contains one or more selected from polyhydric alcohols and one or more selected from sugar alcohols or sugars. 4. The cosmetic preparation according to any one of 1. to 3., characterized in that the moisturizing agent according to 1. contains one or more selected from polyhydric alcohols and two or more selected from sugar alcohols or sugars. 5. The cosmetic composition according to any one of 1. to 4., characterized in that the moisturizing agent according to 1. contains one or more selected from the group consisting of glycerin, diglycerin, dipropylene glycol, 1,2-pentanediol, 1,3-butylene glycol, maltitol, sorbitol, mannitol, glucose, raffinose, and trehalose. Effect of the Invention

[0015] The cosmetic of the present invention provides an excellent feeling of use (spreadability, compatibility with the skin, smooth feeling after compatibility, moisturizing feeling) without unpleasant sensations such as the filmy feeling and squeaky feeling peculiar to the copolymer of 2-(dimethylamino)ethyl methacrylate and ethyl methacrylate used in the present invention, or the sticky feeling peculiar to moisturizing agents. Furthermore, the antibacterial properties and safety to the skin of the copolymer of 2-(dimethylamino)ethyl methacrylate and ethyl methacrylate used in the present invention are maintained, allowing the cosmetic to be used hygienically to the end. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The cosmetic of the present invention can be formulated with a cationic polymer that combines antibacterial properties and safety, providing a pleasant feel when used, and can provide an excellent feel when used (ease of application, feeling of compatibility with the skin, smooth feeling after application, and moisturizing feeling).

[0017] The present invention relates to a cosmetic preparation containing a copolymer (INCI name: (acrylates / dimethylaminoethyl methacrylate) copolymer) of a structural unit (A) derived from 2-(dimethylamino)ethyl methacrylate represented by the following general formula (1) and a structural unit (B) derived from ethyl methacrylate represented by the following general formula (2), and a moisturizing agent.

[0018] [ka]

[0019] [ka] For 100% by mass of all structural units, The proportion of the structural unit (A) is 50 to 95 mass%, the proportion of the structural unit (B) is 5 to 50 mass%, and the proportion of structural units derived from other monomers is less than 5 mass%, The weight average molecular weight of this copolymer is 20,000 to 50,000.

[0020] <About the copolymer> The proportion of the structural unit (A) relative to 100% by mass of all structural units in the copolymer is 50 to 95% by mass, preferably 50 to 90% by mass, more preferably 50 to 75% by mass, and even more preferably 55 to 65% by mass. The proportion of the structural unit (B) relative to 100% by mass of all structural units in the copolymer is 5 to 50% by mass, preferably 10 to 50% by mass, more preferably 25 to 50% by mass, and even more preferably 35 to 45% by mass. In this specification, the expression "A to B" (A and B are numerical values) indicates a range that includes A and B.

[0021] The copolymer used in the present invention may have a structural unit (e) derived from another monomer (E) other than the structural unit (A) derived from 2-(dimethylamino)ethyl methacrylate and the structural unit (B) derived from ethyl methacrylate. The other monomer (E) is not particularly limited as long as it can be copolymerized with 2-(dimethylamino)ethyl methacrylate and ethyl methacrylate.

[0022] Examples of the monomer that can be used as the monomer (E) are given below. For example, there is an unsaturated monocarboxylic acid (salt), such as (meth)acrylic acid (salt). For example, alkyl (meth)acrylates can be mentioned as esters of (meth)acrylic acid and alkyl alcohols. In this case, the alkyl group may have a straight-chain structure or a branched structure, and preferably has 1 to 12 carbon atoms. For example, the above-mentioned (meth)acrylate esters of (meth)acrylic acid and alcohols may have a substituent, such as a hydroxyl group, an alkoxy group, an oxyalkylene group, or a sulfone group. For example, a monomer having two or more ethylenically unsaturated groups may be included. Examples of the polyol include esters of di- or more substituted hydroxyl groups of polyols such as ethylene glycol, propylene glycol, sorbitol, and 1,4-butanediol with (meth)acrylic acid; and ethers of di- or more substituted hydroxyl groups of the above polyols with unsaturated alcohols such as allyl alcohol and vinyl alcohol. These other monomers may be used alone or in combination of two or more kinds.

[0023] (Moisturizer) The moisturizing agent used in the present invention may be any substance that has the skin moisturizing function (wetting function) required for cosmetics. Such substances include polyhydric alcohols, sugar alcohols, saccharides, and various substances with moisturizing effects. Examples of substances with moisturizing effects other than polyhydric alcohols, sugar alcohols, and saccharides include collagen and amino acids.

[0024] (Polyhydric alcohol) Examples of polyhydric alcohols include glycols such as ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, isoprene glycol, 1,3-butylene glycol, 1,2-butanediol, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, and 1,2-decanediol; glycerins such as glycerin, diglycerin, and polyglycerin; and polyoxyalkylene alkyl glucosides. In the cosmetic composition of the present invention, from the viewpoint of excellent feel on the skin when used, preferred examples include glycerin, diglycerin, dipropylene glycol, 1,2-pentanediol, and 1,3-butylene glycol.

[0025] (Sugar alcohol) As sugar alcohol Examples of sugar alcohols include xylitol, maltitol, mannitol, sorbitol, erythritol, arabitol, ribitol, galactitol, glucitol, and erythritol. From the viewpoint of the feel when applied to the skin, mannitol, sorbitol and maltitol are preferred, and from the viewpoint of the sticky feel when applied to the skin and the smooth feel after absorption, mannitol and sorbitol are particularly preferred.

[0026] (Sugars) As the saccharide, monosaccharides such as glucose, fructose, etc., disaccharides such as sucrose, trehalose, etc., trisaccharides such as raffinose, etc., mucopolysaccharides such as hyaluronic acid, sodium hyaluronate, acetylated hyaluronic acid, etc. can be used. From the viewpoint of the high effect of suppressing the filmy feel and squeaky feel unique to the polymer used in the cosmetic of the present invention, and the smooth feel after application to the skin without a sticky feel, monosaccharides, disaccharides, and trisaccharides are preferred, and glucose, raffinose, and trehalose are more preferred.

[0027] Examples of amino acids include valine, leucine, isoleucine, threonine, methionine, phenylalanine, tryptophan, lysine, glycine, alanine, asparagine, glutamine, serine, cysteine, cystine, tyrosine, proline, hydroxyproline, aspartic acid, glutamic acid, hydroxylysine, arginine, ornithine, and histidine.

[0028] As the polyhydric alcohol, sugar alcohol and sugar used in the cosmetic of the present invention, it is preferable to combine one or more selected from polyhydric alcohols with one or more selected from sugar alcohols or sugars, and it is even more preferable to combine one or more selected from polyhydric alcohols with two or more selected from sugar alcohols or sugars, in that a more excellent feel can be obtained when used.

[0029] The concentration of the copolymer of 2-(dimethylamino)ethyl methacrylate and ethyl methacrylate used in the present invention is not particularly limited as long as it is within a range in which antibacterial activity can be expected, but the lower limit of the concentration is preferably 0.001% by mass or more, more preferably 0.01% by mass or more, based on the total mass% of the cosmetic. The upper limit of the concentration is preferably 20% by mass or less, more preferably 10% by mass or less, and particularly preferably 5% by mass or less, based on the total mass% of the cosmetic.

[0030] In the cosmetic of the present invention, the mass ratio of the moisturizer to 1 mass % of the copolymer of 2-(dimethylamino)ethyl methacrylate and ethyl methacrylate used in the present invention is preferably from 0.5 to 500, more preferably from 1 to 500. If the mass ratio is less than 0.5, the user may feel a squeaky feeling or filmy feeling unique to the polymer used in the present invention, whereas if it exceeds 500, the user may feel a sticky feeling derived from the moisturizer, resulting in a poor feel when used.

[0031] In the cosmetic of the present invention, the mass ratio of polyhydric alcohol to 1% by mass of the copolymer of 2-(dimethylamino)ethyl methacrylate and ethyl methacrylate used in the present invention is preferably 0.5 to 500, more preferably 1 to 400. In the cosmetic of the present invention, the mass ratio of sugar alcohol or sugar to 1% by mass of the copolymer of 2-(dimethylamino)ethyl methacrylate and ethyl methacrylate is preferably 0.5 to 500, more preferably 1 to 200.

[0032] When the polyhydric alcohol, sugar alcohol and sugar used in the cosmetic of the present invention are a combination of one or more selected from polyhydric alcohols and one or more selected from sugar alcohols or sugars, or a combination of one or more selected from polyhydric alcohols and two or more selected from sugar alcohols or sugars, it is preferable that the mass ratio of the polyhydric alcohol to 1 mass% of the copolymer of 2-(dimethylamino)ethyl methacrylate and ethyl methacrylate used in the present invention is 1 or more and 400 or less, and the mass ratio of the sugar alcohol or sugar to 1 mass% of the copolymer is 1 or more and 100 or less.

[0033] The cosmetic preparation of the present invention can be produced according to a commonly used formulation method, and can be in the form of a solution such as a lotion, milky lotion, cream, or gel, an emulsion, or a polymer gel preparation, as well as a foam preparation, a multi-layer preparation, a spray preparation, or a sheet or gel pack preparation in which nonwoven fabric or the like is impregnated.

[0034] The cosmetic composition of the present invention may contain, as long as the effects of the present invention are not impaired, fats and oils such as vegetable oils, higher fatty acids, higher alcohols, silicones, anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, preservatives, sequestering agents, powder components, ultraviolet absorbers, ultraviolet blocking agents, fragrances, pH adjusters, etc. It may also contain other medicinal and physiologically active ingredients such as vitamins, skin activators, blood circulation promoters, resident flora control agents, active oxygen scavengers, anti-inflammatory agents, whitening agents, and bactericides.

[0035] The cosmetic composition of the present invention can be produced by a conventional method.

[0036] The following are tests conducted by the inventors of the present application, The polymer has a structural unit (A) derived from 2-(dimethylamino)ethyl methacrylate represented by the following general formula (1) and a structural unit (B) derived from ethyl methacrylate represented by the following general formula (2), the proportion of the structural unit (A) is 50 to 95 mass%, the proportion of the structural unit (B) is 5 to 50 mass%, and the proportion of structural units derived from other monomers is less than 5 mass%, relative to 100 mass% of all structural units; The present invention will be described in detail with reference to the following examples, which show that a cosmetic preparation containing a copolymer having a weight-average molecular weight of 20,000 to 50,000 and a moisturizing agent provides an excellent feeling when used without giving a filmy feeling or squeaky feeling peculiar to the copolymer.

[0037] [ka]

[0038] [ka] EXAMPLES

[0039] <Gel Permeation Chromatography (GPC)> The weight average molecular weight (Mw) of the copolymer was measured by gel permeation chromatography (GPC) under the following conditions and apparatus: Equipment: Waters e2695 Detector: Differential Refractometer (RI) detector Column: Tosoh TSKgel α-M, α-2500 Column temperature: 40℃ Flow rate: 0.8mL / min Injection volume: 10 μL (eluent preparation solution with sample concentration of 0.4 wt%) Calibration curve: Polyethylene glycol manufactured by GL Sciences GPC software: Waters EMPOWER3 Eluent: 0.5M acetic acid + 0.2M Na nitrate / acetonitrile = 50 / 50 (v / v)

[0040] Cosmetics were prepared for Examples 1 to 41 and Comparative Examples 1 to 8 by blending the components in the mass ratios shown in Tables 1 to 4. The components used are as follows.

[0041] As the copolymer of 2-(dimethylamino)ethyl methacrylate and ethyl methacrylate used in the present invention, a copolymer manufactured by Nippon Shokubai Co., Ltd. was used, which has a molecular weight of about 30,000 and is composed of about 60% by mass of 2-(dimethylamino)ethyl methacrylate and about 40% by mass of ethyl methacrylate relative to 100% by mass of all structural units (hereinafter referred to as copolymer (1)); or a copolymer having a molecular weight of about 87% by mass of 2-(dimethylamino)ethyl methacrylate, about 10% by mass of ethyl methacrylate, and about 3% by mass of acrylic acid relative to 100% by mass of all structural units (hereinafter referred to as copolymer (2)).

[0042] The POE alkyl glucoside used in the test was MacBioBride MG-10E (manufactured by NOF Corp.). Other examples include MacBioBride MG-20E (manufactured by NOF Corp.) and NIKKOL BMG-10 (manufactured by Nikko Chemicals Co., Ltd.). The sorbitol used was Sorbitol D-70 manufactured by Mitsubishi Corporation Foodtech Co., Ltd. Sorbitol D-70 is a mixed raw material consisting of 70% by mass of sorbitol and 30% by mass of water.

[0043] Ten trained expert panelists took 1-2 drops of the prepared cosmetic from the eye dropper bottle onto the back of the hand or 2-4 drops onto the inside of the upper arm (each expert panelist decided on the amount and location of application that would allow them to judge the sensation of use) and spread it evenly over the skin, then evaluated the sensation of use during and after application according to the following criteria for seven items: film feel when applied to the skin, squeaky feeling, spreadability, skin compatibility, sticky feeling, smooth feeling after compatibility, and moisturizing feeling. Each item was evaluated according to the following criteria.

[0044] (membrane feeling) The filmy feeling is the skin sensation that occurs after a cosmetic preparation is applied and absorbed, in which the skin surface is covered with a film, causing a feeling of tightness. 5: I didn't mind 4: It didn't bother me much. 3: Neither 2: I was a little concerned 1: I was curious

[0045] (creaking sensation) The "squeaky feeling" refers to a physical discomfort felt at the application site after applying a cosmetic, such as excessive friction, and can also be felt when the surface of the application site is covered with a film or has many irregularities, losing smoothness and causing a rough feel. 5: I didn't mind 4: It didn't bother me much. 3: Neither 2: I was a little concerned 1: I was curious

[0046] (Stretch) Spreadability refers to the length and area of ​​a cosmetic that spreads when applied to the skin and then spread, and is evaluated according to the following criteria. 5: Good 4: Fairly good 3: Neither 2: Somewhat bad 1: Bad

[0047] (Feels good on the skin) The feeling of compatibility with the skin is the sensation of the cosmetic being absorbed and soaked into the skin when applied, which is the opposite of the sensation of the cosmetic being repelled and not feeling like there is any residual liquid after a certain amount of time has passed since application. 5: Good 4: Fairly good 3: Neither 2: Somewhat bad 1: Bad

[0048] (Sticky feeling) The sticky feeling is a viscous or sticky feeling that remains even after a certain period of time has passed after the cosmetic is applied to the skin. 5: I didn't mind 4: It didn't bother me much. 3: Neither 2: I was a little concerned 1: I was curious

[0049] (Smooth feeling after application) After applying the cosmetic to the skin, you will feel the aforementioned familiarity, and when you run your finger over the applied area, it will glide smoothly without resistance, which refers to the smoothness of the skin. 5: Good 4: Fairly good 3: Neither 2: Somewhat bad 1: Bad

[0050] (Moisturizing) It refers to the moisture of the skin after applying cosmetics to the skin, and is a sensation that is judged in a complex way, taking into account whether it is lacking, refreshing, moist, just right, or sticky. 5: Good 4: Fairly good 3: Neither 2: Somewhat bad 1: Bad

[0051] (comprehensive evaluation) The average scores of the seven sensory evaluation items mentioned above were calculated and rated according to the following criteria. If even one item received an "x" rating in the sensory evaluation, it was deemed that the product had problems with usability in practical use. ◎: Average score 4 or more ○: Average score 3 or more but less than 4 △: Average score 2 or more but less than 3 ×: Average score less than 2

[0052] (result)

[0053] [Table 1]

[0054] The copolymers (1) and (2) (copolymers of 2-(dimethylamino)ethyl methacrylate and ethyl methacrylate) used in the present invention have excellent antibacterial properties and safety, but compared to cosmetic raw materials commercially available under the same INCI name (acrylates / dimethylaminoethyl methacrylate) copolymer, there was a problem with the use sensation unique to the polymer, that is, the filmy feeling and squeaky feeling unique to the polymer were strongly felt. The moisturizers shown in Examples 1 to 12 were able to eliminate the filmy feeling and squeaky feeling unique to the polymer, and were highly evaluated for spreadability, compatibility with the skin, stickiness, smoothness after compatibility, and moisturizing feeling, and it was confirmed that the use sensation was excellent. On the other hand, it was confirmed that the polyquaternium-51 (2-methacryloyloxyethyl phosphorylcholine-butyl methacrylate copolymer liquid) shown in Comparative Example 2 could not suppress the squeaky feeling. In addition, it was confirmed that the film-like feel was slightly suppressed in the case of PCA glyceryl isostearate-25, silica, carbomer, and (ammonium acryloyldimethyltaurate / VP) copolymer shown in Comparative Examples 3 to 6. However, it was confirmed that PCA glyceryl isostearate-25 was rated low in terms of compatibility with the skin and moisturizing feel, and silica, carbomer, and (ammonium acryloyldimethyltaurate / VP) copolymer were rated low in terms of compatibility with the skin.

[0055] [Table 2] As shown in Examples 13 to 20, it was confirmed that even when the amount of polyhydric alcohol or sugar alcohol was as small as 1% by mass per 1% by mass of the copolymer (Examples 13 and 17), a cosmetic product with excellent usability was obtained without any filmy or squeaky feeling.

[0056] [Table 3] It was confirmed that, compared to Examples 21 and 22, when one or more selected from polyhydric alcohols and one or more selected from sugar alcohols or saccharides were combined as shown in Examples 23 to 26 and 28, the squeaky feeling peculiar to the copolymer was not felt, and in particular, the feeling of use, such as spreadability and moisturizing feeling, was improved. Furthermore, as shown in Examples 31 to 34, when one or more selected from polyhydric alcohols and two or more selected from sugar alcohols or saccharides were combined, the filmy feeling and squeaky feeling were not felt, and all evaluation items of the sensory test except for the evaluation of spreadability in Example 32 were rated the highest, confirming that a cosmetic product with an excellent feeling of use was obtained.

[0057] [Table 4] As shown in Examples 35 to 41, it was confirmed that even when the amount of polyhydric alcohol or sugar alcohol was as high as 400% by mass (Examples 35 to 38) per 1% by mass of the copolymer, a cosmetic product with excellent usability was obtained without any filmy or squeaky feeling.

[0058] Formulation example 1 (lotion) (Ingredients) (mass%) 1.Copolymer (1) 0.1 2. Glycerin 8 3.1.3-Butylene glycol 5 4. 1,2-Pentanediol 1 5. Mannitol 2 6. Sorbitol 2 7. Xanthan gum 0.08 8. Squalane 3 9. Dimethicone 1 10. Polysorbate 60 0.8 11. Sorbitan stearate 0.3 12. pH adjuster (appropriate amount) 13.Purified water remainder A milky lotion was obtained by a conventional method. The milky lotion of Formulation Example 1 was a milky lotion with good moisturizing properties that was not sticky and provided a long-lasting moist feeling. In addition, there was no filmy or squeaky feeling at all.

[0059] Formulation example 2 (particle-containing pack cosmetic) (Ingredients) (mass%) 1.Copolymer (1) 0.1 2.Polyethylene powder 0.12 3.1,3-Butylene glycol 5 4. 1,2-Pentanediol 1.5 5. Glycerin 10 6. Diglycerin 8 7. Mannitol 2 8. Sorbitol 2 9. Sodium Carboxymethyl Cellulose 4 10. Locust bean gum 0.15 11. pH adjuster (appropriate amount) 12.Purified water remainder All the ingredients were mixed uniformly to obtain a particle-containing pack cosmetic. The particle-containing pack cosmetic of Formulation Example 2 was not sticky, and even after rinsing, it left a moist feeling with no filmy or squeaky feeling.

[0060] Formulation example 3 (sheet mask) (Ingredients) (mass%) 1.Copolymer (1) 0.1 2.1,3-Butylene glycol 6 3. 1,2-Pentanediol 2 4. Glycerin 6 5. Tripropylene glycol 3 6. Mannitol 2 7. Sorbitol 2 8. Pentaerythrityl tetraethylhexanoate 5 9. Dimethicone 1 10. Phytosteryl / Octyldodecyl Lauroyl Glutamate 0.1 11. Polyglyceryl-10 Stearate 2 12. (Acrylates / C10-30 alkyl acrylate) crosspolymer 0.15 13. Potassium hydroxide 0.05 14. pH adjuster (appropriate amount) 15.Purified water remainder All ingredients were mixed uniformly to obtain a milky cosmetic. A nonwoven fabric was impregnated with the mixture to make a sheet mask. The mask of Formulation Example 3 was applied to the face for 15 minutes, and after being massaged into the skin and peeled off, it was not sticky, had excellent moisturizing effect, and lasted. There was no filmy or squeaky feeling at all.

[0061] Formulation example 4 (hair care treatment lotion) (Ingredients) (mass%) 1.Copolymer (1) 0.1 2.1,3-Butylene glycol 5 3. 1,2-Pentanediol 1.5 4. Diglycerin 1 5. Tripropylene glycol 5 6. Mannitol 2 7. Sorbitol 2 8. Stearyltrimethylammonium chloride 0.5 9. Methylphenylpolysiloxane 1 10. Dimethicone 1 11. pH adjuster (appropriate amount) 12.Purified water remainder All the ingredients were mixed uniformly to obtain a treatment lotion. The treatment lotion of Formulation Example 4 was not sticky even on hair and had an excellent moist feeling. In addition, there was no filmy feeling or squeaky feeling at all.

[0062] Formulation example 5 (beauty essence) (Ingredients) (mass%) 1.Copolymer (1) 0.1 2.1,3-Butylene glycol 2 3. 1,2-Pentanediol 1.5 4. Glycerin 10 5. Tripropylene glycol 15 6. Mannitol 2 7. Sorbitol 2 8. Hydrogenated lecithin 0.1 9. Dimethicone 2 10. SIMULGEL NS 2 11. pH adjuster (appropriate amount) 12.Purified water remainder All ingredients were mixed evenly to obtain a beauty essence. A non-sticky beauty essence with excellent moisturizing properties was obtained. There was no squeaky feeling at all. SIMUGEL NS is a premixed raw material made by SEPPIC that mainly contains (hydroxyethyl acrylate / sodium acryloyldimethyl taurate) copolymer.

[0063] Formulation example 6 (liquid foundation) (Ingredients) (mass%) 1.Copolymer (1) 0.1 2.1,3-Butylene glycol 10 3. Glycerin 10 4. Tripropylene glycol 8 5. Mannitol 2 6. Sorbitol 2 7. Cyclomethicone 10 8. Dimethicone Copolyol 3 9. Dimethicone 0.5 10. Neopentyl glycol dioctanoate 2.5 11. Hydrogenated lecithin 0.4 12. Sodium Hyaluronate 0.03 13. Hydrolyzed collagen 0.01 14. Mica 3 15. Talc 2 16. Hydroxide Al2 17. Aluminum distearate 0.2 18. Iron Oxide 1 19. Titanium dioxide 12 20.Purified water remainder All the ingredients were mixed uniformly to obtain a liquid foundation. The liquid foundation of Formulation Example 6 was neither sticky nor squeaky, and had an excellent moist feeling. In addition, there was no filmy feeling or squeaky feeling at all.

Claims

[Claim 1] The polymer has a structural unit (A) derived from 2-(dimethylamino)ethyl methacrylate represented by the following general formula (1) and a structural unit (B) derived from ethyl methacrylate represented by the following general formula (2), the proportion of the structural unit (A) is 50 to 95 mass%, the proportion of the structural unit (B) is 5 to 50 mass%, and the proportion of structural units derived from other monomers is less than 5 mass%, relative to 100 mass% of all structural units; A cosmetic preparation comprising a copolymer having a weight average molecular weight of 20,000 to 50,000 and a moisturizing agent, The cosmetic preparation is characterized in that the moisturizing agent contains at least one selected from the group consisting of glycerin, dipropylene glycol, and 1,3-butylene glycol, mannitol, and raffinose. 【Chemistry 1】 【Chemistry 2】

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