JP2008247833A - Emulsified cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an emulsified cosmetic which is high in a moisture-retaining effect and its persistency, gives moderate tensive touches and the like, and gives excellent senses of use. <P>SOLUTION: This emulsified cosmetic is characterized by containing a component (a): an olefin homopolymer comprising propylene or 1-butene as a monomer and having a weight-average mol.wt. (Mw) of 25,000 to 100,000 and a melting point of 60 to 100°C, and a component (b): a pasty water-holding oil having a melting point of ≥35°C. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an emulsified cosmetic containing a specific olefin polymer and a specific water-holding oil. More specifically, the moisturizing effect and its sustainability are high, and a feeling of use such as an appropriate elasticity can be obtained. In particular, the present invention relates to an emulsified cosmetic.

  Human skin is exposed to a dry environment all year round due to the effects of dryness in the winter and cooling in the summer. In response to this situation, skin care preparations that moisturize the skin have been developed to improve the dryness of the skin. So far, as ingredients to be incorporated into cosmetics for the purpose of moisturizing, water-soluble moisturizers such as amino acids, mucopolysaccharides, organic acid salts and glycols, and ester oils with high water retention are generally known. It has been. (For example, see Patent Documents 1 and 2)

  On the other hand, the device which suppresses moisture transpiration by forming a film on the skin and improves the moisturizing effect has been made. For example, a technique for blending a water-soluble polymer such as carboxyvinyl polymer, gum arabic, guar gum, xanthan gum (for example, see Patent Document 3), a technique for blending an oily base material such as petroleum jelly with a coating feeling (for example, Patent Document 4) has been reported.

  In addition, in order to improve the adhesion of cosmetics themselves and the durability of the cosmetic film, paste oils such as polybutene, solid oils such as polyethylene wax, resin components such as rosin acid resins, maleic acid-modified ester gum, etc. It has been. (For example, see Patent Document 5)

JP-A-9-208423 JP 2005-132730 A JP 2002-265319 A JP 2003-128533 A JP 2006-248997 A

However, when these components were used in combination with emulsified cosmetics, the emulsified cosmetics containing a water-holding oil had a moisturizing effect on the skin, but had problems in terms of feeling of use such as stickiness, and moisturizing. The sustainability of the effect was not satisfactory. In addition, emulsified cosmetics formulated with water-soluble polymers provide a moisturizing effect and a feeling of firmness due to the film. There was a problem that the film was stuck after the material was dried. In addition, emulsified cosmetics containing solid oil and resin components are excellent in adhesion and durability of cosmetics, but they are heavy in use and have poor cosmetic films due to solid oil crystallinity and resin compatibility. Since it became uniform, there was also a problem in terms of sustaining the moisturizing effect.
Therefore, it has been desired to develop a cosmetic that has a high moisturizing effect and its sustainability and also has an excellent feeling of use.

  In such a situation, the present inventors have conducted intensive research, and as a result, emulsified cosmetics containing a specific olefin polymer and a specific oil agent have excellent adhesion, high moisturizing effect and high sustainability, and are soft. The present invention has been completed by finding that the film has an excellent feeling of use, such as being able to obtain an appropriate elasticity.

That is, the present invention includes the following components (a) and (b);
Component (a) Olefin polymer component (b) which is a homopolymer having propylene or 1-butene as a monomer, has a weight average molecular weight (Mw) of 25,000 to 100,000 and a melting point of 60 ° C. to 100 ° C. The present invention provides an emulsified cosmetic characterized by containing a hydrated oil agent exhibiting a shape.

  The emulsified cosmetic of the present invention has a high moisturizing effect and its sustainability by combining a high-molecular weight olefin polymer having a low melting point, which has not been used in cosmetics, and has an appropriate elasticity. It is extremely excellent in use feeling.

Hereinafter, the present invention will be described in detail.
The component (a) olefin polymer used in the present invention is a homopolymer of propylene or 1-butene. In the present invention, the adhesion to the skin is imparted, and the component (b) interacts. By forming a flexible film, it is blended for the purpose of imparting firmness and sustaining moisturizing effect.

  The weight average molecular weight (Mw) of the component (a) used for this invention is 25000-100,000, As a preferable range, it is 30000-70000. If the weight average molecular weight (Mw) is less than 25000, the weight average molecular weight (Mw) may be sticky. The weight average molecular weight (Mw) was calculated using a GPC measurement apparatus (column: TOSO GMHHR-H (S) HT, detector: RI detector for liquid chromatogram WATERS 150C), and the detailed measurement conditions were 1 as a solvent. , 2,4-trichlorobenzene, measurement temperature is 145 ° C., flow rate is 1.0 ml / min, sample concentration: 2.2 mg / ml, injection amount is 160 microliters, calibration curve is Universal Calibration, analysis program: HT-GPC (Ver. 1.0).

  The melting point of the component (a) used in the present invention is in the range of 60 ° C to 100 ° C, and a preferable range is 70 ° C to 80 ° C. When the melting point is less than 60 ° C., it may be sticky, and when it exceeds 100 ° C., the melting point becomes high, and problems such as poor handling and crystal precipitation occur when blended into cosmetics. The melting point was measured by using a differential scanning calorimeter (DSC), holding the sample at −10 ° C. for 5 minutes in a nitrogen atmosphere, and then raising the temperature at 10 ° C./min. The melting point (Tm) is defined as the peak top of the peak observed on the side.

  Component (a) used in the present invention has a molecular weight distribution (Mw / Mn) measured by GPC method of 4 or less, more preferably 3.5 or less, and particularly preferably 3.0 or less. If the molecular weight distribution (Mw / Mn) exceeds 4, stickiness may occur.

  The polymerization method of the olefin polymer used in the present invention is not particularly limited, and any method such as a slurry polymerization method, a gas phase polymerization method, a bulk polymerization method, a solution polymerization method and a suspension polymerization method may be used. From the viewpoint of molecular weight distribution, a synthesis method using a metallocene complex is preferable, and for example, it can be produced based on the methods described in International Publication WO2003 / 070788 and International Publication WO2003 / 091289.

Moreover, the olefin polymer of this invention has the following characteristics.
The intrinsic viscosity [η] measured at 135 ° C. in a tetralin solvent is 0.01 to 0.5 deciliter / g, and this intrinsic viscosity [η] is preferably 0.1 to 0.5 deciliter / g, particularly Preferably it is 0.2-0.4 deciliter / g. When the intrinsic viscosity [η] is less than 0.01 deciliter / g or more than 0.5 deciliter / g, the adhesion and applicability of the cosmetic may be poor.

  Although the compounding quantity of the component (a) in this invention is not specifically limited, Preferably, it is 0.1-40 mass% (henceforth only "%"), More preferably, it is 0.5-20%. . Within this range, an emulsified cosmetic with excellent adhesion and excellent moisturizing effect can be obtained.

  The water-holding oil agent of component (b) used in the present invention is an oil agent that shows a paste at 20 ° C., and is blended to impart a moisturizing effect. In the present invention, the water retention refers to the water retention (%) measured by the following water retention test. The water-holding power test method involves weighing 10 g of a sample heated to 50 ° C. into a 200 ml beaker and gradually adding water at 50 ° C. while stirring at 3000 rpm with a Despera mixer until the water drains from the sample. The maximum amount (weight) at which water does not drain was measured, and this value was divided by 10 g of the sample and multiplied by 100 to obtain the water holding power (%).

  The water-holding oil of component (b) of the present invention may be any oil as long as it can hold water in itself. Especially when the water-holding power is 100% or more, water equal to or more than its own weight. Is preferable because it can retain water. Specifically, for example, lanolin, reduced lanolin, lanolin fatty acid, lanolin alcohol, lanolin acetate, lanolin derivatives such as hydroxy lanolin and those modified with polyoxyalkylene, macadamian nut oil fatty acid phytosteryl, lauroyl glutamate dioctyldodecyl, Amino acid phytosterol, castor oil, stearic acid hydrogenated castor oil, polyhydric alcohol fatty acid ester such as shea butter, hexaglycerin fatty acid ester, decaglycerin fatty acid ester, dipentaerythritol fatty acid ester, cholesteryl hydroxystearate, etc. These may be used alone or in combination of two or more as required. Among these, from the viewpoint of a moisturizing effect, N-lauroyl-L-glutamic acid (cholesteryl or phytosteryl behenyl octyldodecyl), dipentaerythritol fatty acid ester, stearic acid hydrogenated castor oil, macadamian nut oil fatty acid phytosteryl, Cholesteryl hydroxystearate is preferred.

  Although the compounding quantity of the component (b) in this invention is not specifically limited, Preferably it is 0.01 to 20%, More preferably, it is 0.1 to 10%. If it is this range, the emulsification cosmetics with the very high moisturizing effect and the usability | use_condition will be obtained.

  The phospholipid of component (c) used in the present invention functions as an emulsifier, and can be suitably used in the present invention from the viewpoints of affinity for skin and imparting firmness. As the phospholipid of the present invention, any phospholipid used in normal cosmetics can be used. Specifically, soybean-derived phospholipid, soybean-derived hydrogenated phospholipid, soybean-derived lysophospholipid, soybean-derived hydrogenated lysophospholipid, egg yolk-derived phospholipid, egg yolk-derived hydrogenated phospholipid, egg yolk-derived lysophospholipid, egg yolk-derived hydrogenated Examples thereof include lysophospholipids, and one or more of them can be used.

  Although the compounding quantity of the component (c) in this invention is not specifically limited, 0.01 to 10% is preferable and 0.1 to 5% is more preferable. When the content of the phospholipid is within this range, an emulsified cosmetic with better emulsifying power and stability over time can be obtained.

  The component (d) petrolatum used in the present invention is blended for the purpose of improving the sustainability of the moisturizing effect of the cosmetic. The petrolatum of this invention should just be used for normal cosmetics, and 0.1-40% is preferable and, as for the compounding quantity of the component (d) in this invention, 0.5-20% is more preferable. When the content of petrolatum is within this range, an emulsified cosmetic that is more excellent in the moisturizing effect and the feeling of use can be obtained.

  Furthermore, the emulsified cosmetic of the present invention must contain water. The amount of the emulsified cosmetic varies depending on the properties of the cosmetic and is not particularly limited, but is preferably 10 to 90%, more preferably 30 to 80%. It is.

  In addition to the above components, the emulsified cosmetic of the present invention includes an aqueous component, an oily component, a surfactant, a water-soluble polymer, a powder component, an antioxidant, an ultraviolet absorber, a powder, a fragrance, a preservative, Ingredients used in normal cosmetics such as colorants, cosmetic ingredients, and pH adjusters can be blended in a quantitative and qualitative range that does not impair the effects of the present invention.

  The properties of the emulsified cosmetic of the present invention are not particularly limited, and examples thereof include liquid, emulsion, cream, gel, spray, and solid. The dosage form of the emulsified cosmetic may be an oil-in-water type, a water-in-oil type, or a multiple emulsion system.

  The use of the emulsified cosmetic of the present invention is not particularly limited, and examples thereof include lotion, milky lotion, serum, pack, cream, sunscreen, cleansing, foundation, makeup base, eye shadow, mascara and the like. Of these, skin care cosmetics such as creams and serums are preferred because the excellent effects of the present invention can be realized.

  EXAMPLES Next, although an Example is given and this invention is demonstrated still in detail, this invention is not limited at all by these.

Production Example 1
Propylene polymer was produced in accordance with the method described in International Publication WO2003 / 091289. The resulting propylene polymer had a melting point of 80 ° C. and a weight average molecular weight (Mw) of 30000.

Production Example 2
The 1-butene polymer was produced according to the method described in International Publication WO2003 / 070788. The obtained 1-butene polymer had a melting point of 70 ° C. and a weight average molecular weight (Mw) of 70000.

Example 1 (Invention products 1 to 7 and Comparative products 1 to 3): Cream (oil-in-water type)
Creams were prepared according to the composition shown in Table 1 and the following production method. The resulting cream was evaluated for (1) moisturizing effect, (2) persistence of moisturizing effect, and (3) firmness by the following methods, and the results are shown in Table 1.

(Production method)
A: Components (1) to (11) are heated to 70 ° C.
B: Components (12) to (17) are heated to 70 ° C.
C: B is added to A and emulsified.
D: After cooling C, components (18) and (19) were added to obtain a cream.

(Evaluation methods)
After cleaning the face with a specific lotion and milky lotion by 10 professional evaluation panels, apply each sample of the present invention products 1-6 and comparative products 1-3 to the entire face to the extent of a rice grain. received. For each sample, the evaluation items of (1) moisturizing effect immediately after application, (2) persistence of moisturizing effect when 3 hours have passed after application, and (3) firmness immediately after application are as follows: The sensory evaluation was performed in 5 stages, and the average score of each sample was further determined in 4 stages using the following criteria (b).

(B) Evaluation criteria [Evaluation results] [Score]
Very good: 5 points Good: 4 points Normal: 3 points Somewhat bad: 2 points Bad: 1 point (b) Judgment criteria [Average score] [Judgment]
4.5 or more: ◎
3.5 or more and less than 4.5: ○
1.5 or more and less than 3.5: △
Less than 1.5: ×

  As is clear from the results in Table 1, the products 1 to 7 of the present invention are all creams that are excellent in moisturizing effect, durability of moisturizing effect, good usability, and can feel a firmness of the skin. . On the other hand, the comparative product 1 in which the paraffin wax was blended in place of the component (a) had a particularly low moisturizing effect. Moreover, the comparative product 2 which does not mix | blend a component (b) and the comparative product 3 which does not mix | blend components (a) and (b) were inferior in all the items.

Example 2 Latex (oil-in-water type)
(Ingredient) (%)
1. Soybean hydrogenated lysophospholipid 1
2. Sorbitan monooleate 1.5
3. Cetostearyl alcohol 1
4). Squalane 5
5. Olefin polymer of Production Example 2 5
6). Cholesteryl hydroxystearate 5
7). Natural vitamin E 0.5
8). Vaseline 2
9. Edetate disodium 0.1
10. Glycerin 8
11. Dipropylene glycol 8
12 Purified water remaining amount 13. Xanthan gum 0.2
14 Ethanol 5
15. Preservative appropriate amount 16. Perfume

(Production method)
A: Components 1 to 8 are dissolved by heating at 70 ° C.
B: Components 9 to 13 are heated and dissolved at 70 ° C., then added to A and emulsified.
C: After cooling B to room temperature, components 14 to 16 were added to obtain an emulsion.

  The emulsion of Example 2 was an emulsion that was excellent in moisturizing effect and its sustainability, had a smooth feeling of use, was not sticky, and had an excellent feeling of use such as moderate elasticity.

Example 3 Cream (water-in-oil type)
(Ingredient) (%)
1. Soybean-derived hydrogenated phospholipid 0.5
2. Glycerin 10
3.1,3 Butylene glycol 5
4). N-lauroyl-L-glutamate phytosterol 3
5. Olefin polymer of Production Example 2 7
6). Polyethylene glycol dipolyhydroxystearate 1
7). Decamethylcyclopentasiloxane 15
8). Glyceryl tri-2-ethylhexanoate 5
9. Dipentaerythritol fatty acid ester 8
10. Purified water remaining amount 11. Sodium lactate 2
12 Edetate disodium 0.1
13. Preservative appropriate amount14. Dimethyl distearyl ammonium hectorite 0.5
15. Ethanol 2
16. Perfume

(Production method)
A: Components 1 to 4 are heated and dissolved at 70 ° C.
B: Components 5 to 9 are heated and dissolved at 70 ° C., and then added to A and mixed.
C: Components 10 to 13 are heated and dissolved at 70 ° C., then added to B and emulsified.
D: After cooling C to room temperature, ingredients 14 to 16 were added to obtain a cream.

  The cream of Example 3 was excellent in the moisturizing effect and its sustainability, and also excellent in the firmness of the skin.

Example 4 Cosmetic liquid (oil-in-water type)
(Ingredient) (%)
1. Egg yolk-derived hydrogenated phospholipids 0.2
2. Glycerin 5
3. Macadamian nut oil fatty acid phytosteryl 0.5
4). Trimethylolpropane triisostearate 0.2
5. Isotridecyl isononanoate 0.2
6). Olefin polymer of Production Example 1 0.5
7). Vaseline 0.5
8). Alkaligenes-producing polysaccharide 0.03
9. Polyethylene glycol 1
10.1,3 Butylene glycol 10
11. Propylene glycol 10
12 Purified water remaining amount 13. Preservative appropriate amount14. Ethanol 10
15. Perfume

(Production method)
A: Components 1 to 7 are dissolved by heating at 70 ° C.
B: Components 8 to 13 are heated and dissolved at 70 ° C., then added to A and emulsified.
C: After cooling B to room temperature, ingredients 14 and 15 were added to obtain a cosmetic liquid.

  The essence of Example 4 was an excellent essence that was excellent in moisturizing effect and its sustainability and felt moderately firm.

Claims (6)

An emulsified cosmetic comprising the following components (a) and (b):
Component (a) Olefin polymer component (b) which is a homopolymer having propylene or 1-butene as a monomer, has a weight average molecular weight (Mw) of 25,000 to 100,000 and a melting point of 60 ° C. to 100 ° C. Water-repellent oil   The emulsified cosmetic according to claim 1, wherein the olefin polymer of the component (a) has a molecular weight distribution (Mw / Mn) by gel permeation chromatography of 4 or less.   The emulsified cosmetic according to claim 1 or 2, wherein the water-containing oil agent of component (b) is capable of holding water equal to or more than its own weight at 50 ° C.   The component (b) water-holding oil is N-lauroyl-L-glutamic acid (cholesteryl or phytosteryl behenyl octyldodecyl), dipentaerythritol fatty acid ester, stearic acid hydrogenated castor oil, macadamian nut oil fatty acid phytosteryl The emulsified cosmetic according to any one of claims 1 to 3, which is one or more selected from cholesteryl hydroxystearate.   The emulsified cosmetic according to any one of claims 1 to 4, further comprising a component (c) phospholipid.   Furthermore, component (d) petrolatum is contained, The emulsified cosmetics in any one of Claims 1-5 characterized by the above-mentioned.