JP2002275023A - Cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a cosmetic having a good use feeling, also imparting a flexibility to a cosmetic membrane after its application for suppressing the phenomenon of collapse of the cosmetic with time in a site having an intense skin movement and capable of maintaining the initial state of make up. SOLUTION: This cosmetic contains the following components (A) and (B): (A) a copolymer of a long chain alkyl (meth)acrylate with a fluorinated alkyl (meth)acrylate, (B) a silicone-based polymer having a rubber elasticity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD [0001] The present invention has a good feeling of use,
Moreover, the present invention relates to a cosmetic that imparts flexibility to a cosmetic film after application, suppresses a phenomenon in which the cosmetic collapses or folds over time even in areas where the skin moves rapidly, and can maintain the initial state of the makeup. .

[0002]

2. Description of the Related Art Generally, the causes of loss of cosmetic ingredients such as pigments and the deterioration of the face with time such as shininess of the face, floating of oil, and color fading are caused by the action of human secretions such as sweat, tears and sebum. And external factors such as skin movement, contact with hands or clothing, and contact with rain and the like. Among these factors, liquid perfluoro organic compounds have recently been used for the purpose of imparting water resistance, sebum resistance and oil resistance to cosmetics (JP-A-61-234928, Kaisho 63-
No. 107911). Further, with respect to external factors, the disappearance of pigments and the like due to contact is improved by the formation of a non-migratory film (Japanese Patent Application Laid-Open Nos. 10-194930 and 10-194930).
No. 7-187954) has been proposed. However, in either case, the effect is only temporary, or the effect of poor adaptation to the skin or the peeling of the film is observed, and the sustained effect on the face, particularly in the region where the skin moves rapidly, is weak. There was a disadvantage. Also, a cosmetic for hiding wrinkles (Japanese Patent Application Laid-Open No. 3-5412) has been proposed, which uses high molecular weight silicone or the like to make fine wrinkles less noticeable. However, this cosmetic has a problem that the effect of hiding the continuous wrinkles after makeup is insufficient, and there is no effect at all depending on the type of makeup cosmetic.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to realize a uniform and clean finish when applying a foundation or makeup, to have a high degree of safety, to have good skin familiarity, and to provide a cosmetic effect even in a region where the skin moves rapidly. An object of the present invention is to provide a cosmetic having excellent durability.

[0004]

SUMMARY OF THE INVENTION The present inventors have found that when a fluorine-containing copolymer and a silicone-based elastic polymer are used in combination, a flexible film is formed after coating, and good stability and It has been found that a cosmetic having a feeling of use can be obtained.

The present invention relates to the following components (A) and (B): (A) a copolymer of a long-chain alkyl (meth) acrylate and an alkyl (meth) acrylate fluoride, and (B) a silicone having rubber elasticity. An object of the present invention is to provide a cosmetic containing a polymer.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The component (A) used in the present invention is a copolymer of a long-chain alkyl (meth) acrylate and a (meth) acrylate having a fluorinated alkyl group bonded thereto. A film can be formed when applied. As the long-chain alkyl (meth) acrylate, an ester of a linear or branched alkyl alcohol having 8 or more carbon atoms (more preferably 8 to 22) and (meth) acrylic acid is preferable. For example, octyl alcohol, decyl alcohol, lauryl Examples include esters of (meth) acrylic acid with long-chain alcohols such as alcohol, cetyl alcohol, stearyl alcohol, and behenyl alcohol. Among them, esters with a long-chain alkyl alcohol having 16 to 22 carbon atoms are preferable.

[0007] Alkyl fluoride (meth) acrylate
Is a polyfluoroalkyl group or a perfluoroalkyl
Group, preferably a polyfluoroalkyl having 4 to 12 carbon atoms
(Meth) acrylic compound having a methyl group or a perfluoroalkyl group
Related, for example, CH_Two= CHCOOC_TwoH_FourC
₆F₁₃, CH_Two= CHCOOC_TwoH_FourC₈F₁₇, CH_Two= CHCOOC_TwoH_FourC_TenF_{twenty one}, CH_Two
= CHCOOC_TwoH_FourC₁₂F_{twenty five}, CH_Two= C (CH_Three) COOC_TwoH_FourC₆F₁₃, CH_Two= C (CH
_Three) COOC_TwoH_FourC₈F₁₇, CH_Two= C (CH_Three) COOC_TwoH_FourC_TenF_{twenty one}, CH_Two= C (C
H_Three) COOC_TwoH_FourC₁₂F_{twenty five}, CH_Two= CHCOOC_TwoH_Four-(CF_Two)_Four-H, CH _Two= CHCO
OC_TwoH_Four-(CF_Two)_Five-H, CH_Two= C (CH_Three) COOC_TwoH_Four-(CF_Two)_Four-H, CH_Two= C
(CH_Three) COOC_TwoH_Four-(CF_Two)_Five-H and the like.

[0008] The copolymerization ratio of the long-chain alkyl (meth) acrylate and the alkyl fluoride (meth) acrylate is as follows:
10: 1 to 1: from the point of good solubility and no stickiness
5 (weight ratio) is preferred. Particularly preferably, 7: 1 to 1:
It is one. The average molecular weight of the component (A) is from 1,000 to 2,000, from the viewpoint of good rub resistance and no stickiness.
000 is preferable, and 10,000 to 50 is more preferable.
000. Here, the average molecular weight is 2 at 105 ° C.
It refers to the value measured by gel permeation chromatography (solvent: tetrahydrofuran, standard substance: polystyrene) for a sample dried for a period of time.

The cosmetic of the present invention may contain two or more types of component (A), and the content thereof is 0.1 to 5% by weight (hereinafter, simply referred to as%), preferably 0.2% by weight. It is better to be 3%.

The component (B) used in the present invention has a polysiloxane chain in the main chain or side chain of the polymer, and is a silicone polymer capable of forming a film having rubber elasticity. Here, rubber elasticity refers to a temperature of 20 ° C. and a relative humidity of 6
When the elongation percentage is in the range of 0 to 15% at 5%, it does not cause fracture or plastic deformation. Here, the elongation rate is 0 to 15
Whether or not plastic deformation occurs within the range of% can be confirmed, for example, by the following method. That is, a polymer is melted or dissolved in a solvent to prepare a cast film, and a sample piece having a thickness of 0.2 to 0.3 mm, a length of 20 mm (measurement length) and a width of 5 mm is prepared, and a temperature of 20 ° C. While recording the stress-strain curve under the condition of the relative humidity of 65%, the crosshead is extended at a crosshead speed of 20 mm / min by 3 mm (15%), and immediately thereafter, the crosshead is returned at the same speed. After 10 minutes, extend again
If the stress-strain curve at the time of the second elongation follows the same trajectory as the first curve, it has been completely recovered, and no plastic deformation has occurred. On the other hand, when plastic deformation occurs, the first reciprocating movement has already caused extension,
In the second elongation, the stress is delayed and as a result, the stress-strain curve does not follow the same trajectory.

Examples of the silicone-based polymer having rubber elasticity include a so-called silicone rubber which exhibits rubber elasticity by partial intramolecular crosslinking, and a polymer which causes intermolecular crosslinking by a bond other than a covalent bond. (See JP-A-10-139650). In particular, those having a hydrophilic segment and an organopolysiloxane segment in the molecule are preferred. Examples of the hydrophilic segment include segments such as poly (N-acylalkyleneimine), polyalkylene glycol, polyalkylene glycol monoalkyl ether and a residue derived from sugar, acrylic acid, methacrylic acid, N, N-dimethylacrylamide, and dimethylaminoethyl. Methacrylate, quaternized dimethylaminoethyl methacrylate, methacrylamide, Nt-butylacrylamide, maleic acid, maleic anhydride, half esters of maleic anhydride, crotonic acid, itaconic acid, acrylamide, acrylate alcohols, hydroxyethyl methacrylate , Diallyl dimethyl ammonium chloride, vinyl pyrrolidone, vinyl ethers, vinyl pyridine, vinyl imidazole, styrene sulfonate, allyl alcohol, vinyl alcohol Le, include segments derived from one or more units selected from vinyl caprolactam, and N- alkylene carbobetaine. Preferably, poly (N-acylalkyleneimine), polyalkylene glycol, polyalkylene glycol monoalkyl ether and a residue derived from sugar, acrylic acid, N, N-dimethylacrylamide, dimethylaminoethyl methacrylate, quaternized dimethylaminoethyl methacrylate, Vinylpyrrolidone and N-
It is derived from units such as alkylenecarbobetaine.

The weight ratio of the hydrophilic segment to the organopolysiloxane segment in the component (B) is from 1/50 to 20.
/ 1, preferably 1/40 to 2/1 and an average molecular weight of 500 to 500,000, preferably 1,000 to 3
Thousands are preferred from the viewpoint of use feeling. Here, the average molecular weight is determined by gel permeation chromatography (solvent: chloroform, standard substance: polystyrene)
It is measured by the following.

Specific examples include poly (N-acylalkyleneimine) -modified silicone, alkylpyrrolidone-modified silicone, silicone having a sugar-derived residue, and vinyl copolymer obtained by using a vinyl monomer having a silicone group. And the like. Particularly, poly (N-acylalkylimine) -modified silicone is preferable.

Poly (N-acylalkyleneimine) -modified silicones can be prepared by known methods (JP-A-2-276824, JP-A-4-85334, JP-A-4-853).
No. 35, JP-A-5-112423, JP-A-7
JP-A-133352), for example, by the following method. First, the segment of poly (N-acylalkyleneimine) is represented by the following formula:
General formula (2);

[0015]

Embedded image

(Wherein R ¹ is a hydrogen atom and has 1 to 22 carbon atoms)
Represents an alkyl group, a cycloalkyl group, an aralkyl group, or an aryl group, and n is 2 or 3. ) Is obtained by ring-opening polymerization of a cyclic imino ether compound (2-oxazoline or 2-oxazine).

The molecular weight of the molecular chain of the poly (N-acylalkyleneimine) is 150 to 150 in terms of polarity and ease of production.
50,000 is preferred, but more preferably 500 to 1
000 is appropriate.

Thus, the poly (N-acylalkyleneimine) -modified silicone can be obtained by reacting the produced polymerization active species with an organopolysiloxane having a functional group capable of reacting therewith.

Examples of the functional group capable of reacting with the above-mentioned polymerization active species include a primary, secondary or tertiary amino group, a mercapto group, a hydroxyl group and a carboxylate group. Among them, an amino group or a mercapto group is preferred. is there. Organopolysiloxanes containing an amino group or a mercapto group in the molecule have a molecular weight of 300 to 400,000 in terms of reactivity.
0 is preferred, and more preferably 800 to 250,000.
0 is appropriate, and the amino group or mercapto group may be introduced at any position of the main chain and the side chain.

The component (B) may contain two or more components in the cosmetic of the present invention.
30%, preferably 0.005-20%, especially 0.05
It is good to make it 10%.

The cosmetic of the present invention comprises these components (A),
(B) In addition to oils, surfactants, wetting agents, preservatives, antioxidants, fragrances, powders, water, aqueous solvents, and other appropriately used components, liquid cosmetics and oils Water-type emulsified cosmetics,
It is prepared into cosmetics such as oil-in-water emulsified cosmetics, solid powder cosmetics, and oil-based cosmetics. In particular, water-in-oil emulsified cosmetics are preferred from the viewpoint of long-lasting cosmetics at sites where the skin moves rapidly.

The cosmetic of the present invention can be suitably used as a makeup cosmetic such as a foundation, makeup base, blush, eyeshadow, eyebrow, lipstick and the like.

[0023]

EXAMPLES Example 1 (Liquid makeup base) The liquid makeup base shown in Table 1 was prepared, and three expert panelists conducted a sensory evaluation on use feeling and makeup durability according to the following criteria. Evaluation ◎ Very good ○ Good △ Normal × Poor

[0024]

[Table 1]

Before use, the liquid cosmetic base of the product 1 of the present invention was a two-layer liquid cosmetic, but could be used as a water-in-oil emulsion cosmetic by shaking lightly up and down during use. All three expert panelists evaluated that the product of the present invention was very good in both feeling of use and long-lasting makeup.
In addition, the makeup lasting was visually evaluated for the state of the change of the makeup and the makeup collapse 6 hours after the face application.

Example 2 (W / O type emulsified liquid foundation) A liquid foundation shown in Table 2 was prepared and evaluated in the same manner as in Example 1.

[0027]

[Table 2]

The product of the present invention was very good in both feeling of use and long-lasting makeup.

Example 3 (Eye Shadow: Solid Powder Type) (Composition) Zinc Stearate 8.5% Nylon Powder 5 Hydrophobized Ultramarine 10 Hydrophobized Iron Oxide 0.4 Mica Titanium 41.5 Sericite Balance Dimethyl Poly Siloxane 5 Stearyl methacrylate / 2- (perfluorooctyl) ethyl methacrylate copolymer 0.5 Poly (N-propionylethyleneimine) / methyl polysiloxane copolymer 1 Ethanol 2

Example 4 (lipstick: oil type) (Composition) Candelilla wax 5% ceresin 15 Stearyl methacrylate · 2- (perfluorooctyl) ethyl methacrylate copolymer 1.5 Light liquid isoparaffin 4 Decamethylcyclopentane Siloxane 10 Jojoba oil Balance BHT 0.02 Poly (N-propionylethyleneimine) / methylpolysiloxane copolymer 5 Ethanol 5 Mica titanium 4 Siliconized titanium oxide 4 Red No. 104 4 Isotridecyl isononanoate 20 Hydrogenated lanolin 6

The cosmetics of Examples 3 and 4 did not lose their makeup and had good persistence in application and good feeling in use.

[0032]

Industrial Applicability The cosmetic of the present invention has a good feeling in use, and imparts flexibility to the applied cosmetic film, and the cosmetic breaks down or erodes over time in areas where the skin moves rapidly. The phenomenon can be suppressed and the initial state of makeup can be maintained.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Mipu Sasaki 2-1-3 Bunka, Sumida-ku, Tokyo F-term in Kao Corporation Research Laboratories 4C083 AA122 AB232 AB242 AB432 AB442 AC012 AC022 AC102 AC122 AC242 AC352 AC472 AC842 AD042 AD072 AD091 AD092 AD151 AD152 AD161 AD162 AD172 AD332 AD512 CC01 CC03 CC12 CC13 CC14 DD05 DD23 DD27 DD32 EE01 EE06

Claims (3)

[Claims] 1. The following components (A) and (B): (A) a copolymer of a long-chain alkyl (meth) acrylate and an alkyl (meth) acrylate fluoride, and (B) a silicone polymer having rubber elasticity. Cosmetics containing. 2. The cosmetic according to claim 1, wherein the component (B) is a silicone polymer having a hydrophilic segment and an organopolysiloxane segment in the molecule. 3. The cosmetic according to claim 1, wherein the component (B) is a poly (N-acylalkylenimine) -modified silicone.