JP2002284629A - Cosmetics - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide cosmetics applied by spreading a membrane having extremely less sense of discomfort in appearance or feel that fulfills both adaptability and feel after application. SOLUTION: The cosmetics include a membrane forming agent and a powder with <=2 kgf/mm<2> of 10% deforming stress. The storage elastic modulus E' of dried membrane formed by spreading on a smooth plate is 1×10<5> -5×10<7> Pa and tangent loss tan δ is <=0.5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cosmetic composition for hair and skin, which has good followability to hair and skin, has no stickiness, and forms a film having a very small appearance and feel.

[0002]

2. Description of the Related Art Conventionally, various film-forming polymers have been used in cosmetics such as hair cosmetics, make-up cosmetics and medicated cosmetics. However, when used on hair or skin, the film does not easily follow the movement of the skin or hair, causing wrinkles, twisting, and feeling of discomfort and stickiness due to the adhesion of the film. there were. In particular, when used on the skin, these problems are remarkable due to subtle irregularities on the skin.

[0003] It is an object of the present invention to provide a cosmetic composition which simultaneously satisfies the followability and the feel after application of a film, and which has a very small uncomfortable appearance and feel.

[0004]

The present invention provides a film forming agent,
And a powder having a 10% deformation stress of 2 kgf / mm ² or less,
Storage elastic modulus E 'of dry film formed by coating on smooth plate
Is 1 × 10 ^{5 to} 5 × 10 ⁷ Pa, and the tangent loss tan δ is 0.
Provide a cosmetic that is 5 or less.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Film-forming agent] The film-forming agent used in the present invention is not particularly limited as long as it is a polymer having a film-forming property at the skin surface temperature (36 ± 5 ° C). It can be used regardless of the water dispersion type. The film properties of the film-forming agent are preferably softer in order to enhance the skin following property when combined with the powder, and the storage elastic modulus E ′ at the skin surface temperature is preferably 1 × 10 ⁷ Pa or less, preferably 1 × 10 ⁷ Pa or less. 10 ⁴ ~
5 × 10 ⁶ Pa is more preferable. There are no particular restrictions on the type of polymer as long as the storage elasticity is in this range.

[0006] The storage elastic modulus E 'of the film-forming agent was measured by first measuring about 2 cm on a fluororesin (PFA) petri dish having a diameter of 5 cm.
g of the sample (film forming agent) was cast, allowed to stand in a horizontal place, dried at 25 ° C. for 24 hours to form a film, and the film was formed using a dynamic viscoelasticity measuring apparatus DVA-200 (IT measurement control). (Measurement conditions: 36 ° C., about 30 mm × 5 mm × 0.5 m)
The sample (m) was subjected to vibration at a frequency of 10 Hz at a rate of temperature increase of 2 ° C./min (measured with a mark length of 20 mm).

Specific examples of the film-forming agent include (meth) acrylic (co) polymers, polyvinyl alcohol and its derivatives / copolymers, vinyl acetate polymers and copolymers, polyurethane, (meth) acryl-polyurethane Urethanes such as polyvinylpyrrolidone-polyurethane, polyester-polyurethane, polyether-polyurethane,
Synthetic rubber such as styrene-butadiene rubber and isoprene rubber, natural rubber, high polymerization degree methylpolysiloxane, silicone rubber such as acryl-silicone and derivatives thereof, and fluoropolymers are exemplified. These film forming agents can be used alone or in combination of two or more. These film-forming agents can also be used in the form of an aqueous polymer emulsion.

[0008] The content of the film-forming agent in the cosmetic composition of the present invention is preferably 5 to 60% by weight from the viewpoints of the film pressure of the film-forming agent, long-lasting makeup, followability to the skin, appropriate viscosity and usability. Preferably, 10 to 50% by weight is more preferable, and 10 to 40% by weight.
% By weight is particularly preferred.

[Powder] The powder used in the present invention has a 10% deformation stress of 2 kgf / mm ² or less, preferably ² kgf / mm ² , from the viewpoint of maintaining soft film properties and obtaining good followability to the skin. 1 kgf / mm ^2, more preferably not more than 0.8 kgf / mm ^2. The lower limit is preferably 0.001 kgf / mm ² or more,
More preferably, a relatively soft powder of 0.005 kgf / mm ² or more is desirable.

The 10% deformation stress of the powder was measured using MCTM-200 manufactured by Shimadzu Corporation. The measurement conditions are
Test mode: 1 (powder of 1 kgf / mm ² or more), 3 (1 kgf / mm2)
/ Mm ² less powder), indenter: plane 50 [mu] m, load: 2 g
f, load rate constant: 0.029 gf / sec, displacement scale: 10 μm, determined by an average value measured five times.

The composition of the powder is not particularly limited as long as the 10% deformation stress is in the above range. Specific examples of the powder include a polyamide resin powder (nylon powder) and a copolymer resin of styrene and acrylic acid. Organic powders such as powders, polyurethane powders, silicone rubber powders, crosslinked natural rubber powders, styrene-butadiene rubber powders, polyisoprene rubber powders, cellulose powders, crosslinked alkyl (meth) acrylate powders, etc. Can be used. Among them, preferred powders are silicone rubber powder, polyurethane powder, and crosslinked alkyl (meth) acrylate powder having 6 to 12 carbon atoms. These powders may be subjected to surface silica, silicone treatment, coating with a polymer, or the like. These powders can be used alone or in combination of two or more. The shape of these powders is not particularly limited, and spheres, needles, scales, irregular shapes and the like can be used.

Although the average particle size of the powder is not particularly limited, it is preferably 0.01 to 100 μm because single particles are not visually recognized and are unlikely to cause discomfort or white residue.
0.1-50 μm is more preferable, and 0.1-30 μm is particularly preferable. Here, the average particle size of the powder indicates the volume average particle size, that is, the average value of the diameter of the sphere corresponding to the volume of the measured particles. Laser diffraction method for powder of 1 μm or more, 1μ
For powders less than m, this is a value determined by a laser scattering method using ethanol as a dispersion medium.

The cosmetic of the present invention has a 10% deformation stress of 2 kg.
The amount of the powder of f / mm ² or less is preferably from 25 to 200 parts by weight, more preferably from 30 to 150 parts by weight, based on 100 parts by weight of the film-forming agent from the viewpoint of obtaining good skin followability and feeling of use. Is more preferable, and 30 to 100 parts by weight is particularly preferable.

The content of the above-mentioned powder in the cosmetic of the present invention is determined so as to prevent the gloss (shininess) of the formed film and the unnaturalness in appearance with hair and skin, and to obtain a good film-forming property. To 1% by weight or more, more preferably 1 to 80% by weight, particularly preferably 10 to 70% by weight,
0% by weight is most preferred.

[Other components] In addition to the above-mentioned film-forming agent and powder, the cosmetic of the present invention comprises a coloring agent such as a dye or pigment, a plasticizer, a humectant, a cooling agent, a warming agent, an emollient component, Preservatives, oily components such as fragrances, viscosity modifiers, and the like can be added to such an extent that the physical properties of the film are not changed.

As the dyes and pigments, "Ministerial Ordinance for Specifying Tar Dyes that can be Used in Pharmaceuticals, etc." (Showa 41
Tar-based pigments and dyes described in the Ministry of Health and Welfare Ordinance No. 30, August 31, 2008). In addition, zinc oxide, titanium dioxide, red iron oxide, iron titanate, γ-iron oxide, yellow iron oxide, loess, black iron oxide, carbon black, lower titanium oxide, mango violet, cobalt violet, chromium oxide, chromium hydroxide, Inorganic pigments selected from cobalt titanate, ultramarine, navy blue, fish scale foil, titanium oxide-coated mica, and titanium oxide-coated talc may also be contained in an amount of 0.01 to 0.5% by weight to the extent that the physical properties of the film are not changed. preferable.

As the plasticizer, cellosolves, carbitols, phthalates and the like can be used, and as the humectant, glycerin, ethylene glycol and aloe extract can be used. Known cooling sensation agents such as l-menthol, and known heating sensation agents such as pepper extract and vanillyl butyl ether are used.

Other emollient components include hydrocarbon oils such as squalane and liquid paraffin; isostearyl myristate, isotridecyl nonanoate, neopentyl glycol dicaprate, dipentaerythot hexaoxystearate, trimethylolpropane triisostearate, Ester oils such as isostearyl isostearate, diisostearyl malate, stearyl methacrylate, di (cholesteryl, octyldodecyl) N-lauroyl-L-glutamate, octyl paramethoxycinnamate; castor oil, jojoba oil, macadamian nut oil, evening primrose Animal and vegetable oils such as oil, olive oil, peppermint oil and liquid lanolin; silicone oils such as dimethylpolysiloxane and methylphenylpolysiloxane; perfluoropolyether;
Fluorinated oils such as fluorine-modified silicones; alcohols,
Polyol, diglyceride, triglyceride and the like can be mentioned. The oil component can be used alone or in combination of two or more.

Examples of thickeners for adjusting viscosity include inorganic thickeners such as smectite and laponite, and polymer thickeners such as sodium acrylate copolymer gel, acrylic emulsion, and polysaccharide thickener. Can be The viscosity modifier can be used alone or in combination of two or more.

In addition, surfactants, ethanol, antiperspirants, ultraviolet absorbers, ultraviolet scattering agents, antioxidants, antiseptic germicides, pH adjusters, vitamins, blood circulation promoters, whitening agents,
A skin activator, a medicinal agent, an extract from animals and plants, water and the like can be appropriately blended.

[Cosmetic] The cosmetic of the present invention is formed by applying the cosmetic of the present invention to a smooth plate from the viewpoint of obtaining a natural finish with good followability to the skin, no uncomfortable feeling. The storage elastic modulus E ′ of the film is 1 × 10 ^{5 to} 5 × 10 ⁷ Pa,
It is preferably 1 × 10 ⁵ to 1 × 10 ⁷ Pa, and the tangent loss tan δ is 0.5 or less, preferably 0.3 or less, and more preferably 0.01 or more. Within such a range, the film does not become harder than the skin, the elasticity of the film and the ability to follow the skin are good, and no uncomfortable feeling is felt. Can be

In the present invention, the storage elastic modulus E 'and the tangent loss tan δ of the dried film of the cosmetic are measured in the same manner as the measurement of the film-forming agent.
A) About 2 g of a sample (cosmetic) is cast on a petri dish,
It was allowed to stand on a horizontal surface, dried at 25 ° C. for 24 hours to form a film, and this film was measured using a dynamic viscoelasticity measuring device DVA-2.
It was determined by a tensile test using 00 (IT Measurement Control Co., Ltd.). The measurement conditions are the same as the measurement of the film forming agent.

The cosmetic of the present invention can be used for makeup cosmetics such as foundation, concealer, blush, eyeshadow, lipstick and the like.

[0024]

EXAMPLES Synthesis of film-forming agent Synthesis example 1: Synthesis of poly (N-propionylethyleneimine) -modified organopolysiloxane 3.75 g of diethyl sulfate and 22.2 g of 2-ethyl-2-oxazoline were dissolved in 125 g of dehydrated ethyl acetate. And
The mixture was heated under reflux in a nitrogen atmosphere for 5 hours, and the terminal reactive poly (N-
(Propionylethyleneimine), where the side chain 1
A 50% ethyl acetate solution of 200 g of a grade aminopropyl-modified polydimethylsiloxane (molecular weight: 110,000, amine equivalent: 9840) was added, and the mixture was heated under reflux for 8 hours and concentrated under reduced pressure to obtain 257 g of an N-propionylethyleneimine-dimethylsiloxane polymer. Was. The resulting N-propionylethyleneimine-dimethylsiloxane polymer had a silicone segment content of 90% and a weight average molecular weight of 118,000. The storage modulus was 5 × 10 ⁵ Pa.

Synthesis Example 2 of Film Forming Agent: Synthesis of Acrylic Polymer Emulsion 150 g of water and 0.5 g of sodium dodecyl sulfate were placed in a reaction vessel.
g, and potassium persulfate 0.5 g, and dissolved oxygen was removed by flowing nitrogen gas. 15 g of methyl methacrylate, 80 g of n-butyl acrylate, 5 acrylic acid
g. The temperature of the reaction vessel was raised to 75 ° C. with stirring,
After the monomer was dropped from the dropping funnel over 3 hours, aging was performed for 3 hours. After cooling, 35% of acrylic acid was neutralized with an aqueous NaOH solution, and then some aggregates were removed to obtain a polymer emulsion having a solid content of 45%. The emulsion was dried and formed into a film.
Tg was -34 ° C. In addition, an attempt was made to measure the storage elastic modulus, but it could not be measured due to stretching when peeled from the Teflon (registered trademark) plate.

Synthesis Example 3 of Film Forming Agent: Synthesis of Silicone-Acrylic Polymer Emulsion A reaction vessel was charged with 50 g of methyl ethyl ketone and 0.5 g of lauroyl peroxide, and nitrogen gas was flowed to remove dissolved oxygen. 20 g of methyl methacrylate, 60 g of n-butyl acrylate, 10 g of acrylic acid, and 10 g of reactive silicone (Silaprene FM0711; manufactured by Chisso Corporation) were charged into the dropping funnel. The temperature of the reaction vessel was raised to 75 ° C. with stirring, the monomer was added dropwise from a dropping funnel over 3 hours, and the mixture was aged for 3 hours. After cooling, add 1N-
70 mL of NaOH was charged and added dropwise to the reaction solution with stirring (neutralized 50% of acrylic acid), and 500 g of ion-exchanged water was added.
Was added to perform phase inversion emulsification. Thereafter, methyl ethyl ketone was removed by an evaporator to obtain a polymer emulsion having a solid content of 45%. The emulsion was dried to form a film, and the film was measured by DSC. As a result, the Tg was -30 ° C. In addition, an attempt was made to measure the storage elastic modulus, but it could not be measured due to stretching when peeled from the Teflon plate.

Synthesis Example 4 of Film-Forming Agent: Synthesis of Acrylic Polymer Emulsion The same reaction was conducted by changing 15 g of methyl methacrylate to 80 g and 80 g of n-butyl acrylate to 15 g in Synthesis Example 2 to obtain a solid content of 45%. A polymer emulsion was obtained. The emulsion was dried to form a film, and the Tg was 68 ° C. as measured by DSC. The storage modulus is 7 ×
It was 10 ⁸ Pa.

Examples 1 to 7 and Comparative Examples 1 to 4 Liquid foundations having the compositions shown in Table 1 were produced, and their storage elastic moduli E ′ and tangent losses tan δ were measured. In addition, the finish, the followability to the skin and the feeling of use when using these foundations were evaluated by the following methods. Table 1 shows the results.

<Evaluation Method> (1) Finish The finish when each foundation was applied to the face by 10 specialized panelists, ie, wrinkles, fine lines,
The degree of conspicuousness of skin unevenness due to pores was evaluated on the following five scales, and the average score was obtained. The average score was 4 or more, “◎”, 3 or more, less than 4 was “○”, and 2 or more, less than 3 was “△”. , Less than 2 was marked as "x". 5: almost unnoticeable, 4: not very noticeable, 3:
Neither can be said, 2: noticeable, 1: very noticeable.

(2) Followability to skin Each foundation was applied to the face, and the degree of wrinkle hiding after performing 30 winks was evaluated by the following five steps by 10 expert panelists, and the average score was obtained. The average score was 4 or more, "◎", 3 or more but less than 4 was "○", 2 or more and less than 3 was "△", and 2 or less was "x". 5: almost unnoticeable, 4: not very noticeable, 3:
Neither can be said, 2: noticeable, 1: very noticeable.

(3) Feeling of Use The feeling (the presence or absence of a film feeling) when each foundation was applied to the face was evaluated by a professional panel of 10 persons on the following five scales, and the average score was obtained. The above was evaluated as “◎”, 3 or more and less than 4 as “○”, 2 or more and less than 3 as “△”, and 2 or less as “x”. 5: Very good, 4: Good, 3: Neither,
2: Somewhat bad, 1: Bad.

[0032]

[Table 1]

Note) * 1; Cross-linked polydimethylsiloxane emulsion (solid content: 45%), manufactured by Shin-Etsu Chemical Co., Ltd., storage modulus: 7 × 10 ⁵
Pa. * 2: Plastic Powder D800 [manufactured by Toshi Pigment Co., Ltd.] * 3: Nylon SP500 [manufactured by Toray Industries, Inc.] * 4: KMP-600 [manufactured by Shin-Etsu Chemical Co., Ltd.] * 5: Tospearl 145A [GE-Toshiba] Silicone Co., Ltd.
* 6; X50-809B [manufactured by Shin-Etsu Chemical Co., Ltd.] As is clear from Table 1, all of Examples 1 to 7 were excellent in finish, followability to skin, and feeling upon use.

[0034]

The cosmetic of the present invention comprises a soft film-forming agent mixed with a soft powder, which is soft but elastic.
It can form a powder-containing film. When actually used as a cosmetic, it has excellent ability to follow the movement of the skin, so its effect lasts even when used for a long time, and at the same time, it has excellent usability and makes wrinkles and pores less noticeable. You can do it.

 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor: Satoshi Sugawara 2-1-3 Bunka, Sumida-ku, Tokyo F-term in Kao Corporation Research Laboratories 4C083 AB232 AD011 AD072 AD092 AD152 AD162 AD262 BB21 CC12 EE06 FF01

Claims (4)

[Claims] 1. A film-forming agent and a 10% deformation stress of 2 kg
The storage modulus E 'of a dry film formed by applying a powder of f / mm ² or less to a smooth plate is 1 × 10 ^{5 to} 5 × 10 ⁷ P
a, a cosmetic having a tangent loss tan δ of 0.5 or less. 2. 10% based on 100 parts by weight of a film forming agent
The cosmetic of claim 1, wherein the deformation stress contains 25 to 200 parts by weight of 2 kgf / mm ² or less powder. 3. The cosmetic according to claim 1, wherein the content of the powder having a 10% deformation stress of 2 kgf / mm ² or less is 1 to 80% by weight. 4. The content of the film-forming agent is 5 to 60% by weight.
The cosmetic according to any one of claims 1 to 3, which is