JP2002348204A - Solid cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To satisfy both the shape sustainability and the sense of use of a solid cosmetic. SOLUTION: The solid cosmetic contains (a) a Fischer Tropsch wax having an average molecular weight of 300-1200, (b) a microcrystalline wax at the ratio (a):(b)=60:40-99.9:0.1 by mass.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a solid cosmetic. More specifically, the present invention relates to a solid cosmetic having extremely excellent shape retention and feeling of use (especially, spreadability and gloss during application).

[0002]

2. Description of the Related Art Solid cosmetics include, for example, lipsticks, lip balms, foundations, pencil-type cosmetics,
Hair sticks are known.

[0003] Among these, oil-based solid cosmetics include liquid oils (for example, castor oil, jojoba oil, squalane, lanolin, various synthetic ester oils, and liquid paraffin).
And a wax (solid agent: for example, carnauba wax, candelilla wax, ceresin, microcrystalline wax, hardened animal oil, hardened vegetable oil, beeswax), and the powder is dispersed.

[0004]

The above-mentioned oily type solid cosmetics provide the required shape retention and use feeling (especially spreadability and gloss during application) of the product by adjusting the mixing ratio of wax and liquid oil. Must be satisfied. However, it is very difficult to simultaneously satisfy sufficient shape retention and feeling of use.

[0005] Because wax is an essential component for solidifying the liquid oil component, it must be incorporated in a sufficient amount to maintain the shape of the product during use (retention). However, when the compounding amount of the wax is large, the spread at the time of application becomes heavy, and the gloss exerted by the liquid oil component is reduced. Therefore, it is extremely difficult to provide a solid cosmetic that satisfies both shape retention and feeling of use due to this reciprocal phenomenon.

[0006] There is a long-felt need in the market for solid cosmetics having excellent shape retention and usability, and many researchers have been developing them. In order to solve the above-mentioned problem, a method of solidifying the liquid oil with a small amount of a wax that provides sufficient shape retention (a small amount of wax that has high hardness) is considered. However, such a wax has a problem that it is difficult to manufacture a product because of its high melting point. That is, when a wax having a high melting point is used, the solid cosmetic must be dissolved at a high temperature and filled in a container. Along with this,
The following serious problems occur. : The shape retention, breakage, and usability of the cosmetic are greatly affected by various temperature conditions during filling (the temperature of the cosmetic at the time of filling, the temperature of the container, the cooling temperature gradient, etc.). Therefore, detailed manufacturing conditions are determined for each prescription, but when the melting point of wax is high, the range of these conditions is narrowed, which may cause a problem. : In the case of an emulsion composition, water in the solid cosmetic evaporates. : Filling containers and manufacturing equipment must be made of high-temperature durable materials. Therefore, the manufacturing cost is high. An object of the present invention is to provide a solid cosmetic having extremely excellent shape retention and feeling of use. It is a further object of the present invention to provide a solid cosmetic which can avoid the above production problems without using a high melting point wax.

The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems. As a result, when the liquid oil was solidified with a wax obtained by mixing Fischer-Tropsch wax and microcrystalline wax having an average molecular weight of 300 to 1200 at a specific ratio, It was discovered that the hardness increased dramatically. The wax composition of the present invention can provide a product with sufficient hardness with a small amount of compounding, and can produce a solid cosmetic having excellent shape retention and excellent stretch gloss without the above-mentioned problem of the melting point.

[0008]

The present invention is as follows. 1: (a) Fischer-Tropsch wax having an average molecular weight of 300 to 1200 and (b) microcrystalline wax, (a) :( b) = 60: 40 to 99.9:
Solid cosmetics containing at a mass ratio of 0.1. 2: The above solid cosmetic further containing a liquid oil component. 3: The solid cosmetic containing only the wax as a solid agent. 4: The solid cosmetic, wherein the solid cosmetic is a lipstick further containing a coloring agent. 5: (a) Fischer-Tropsch wax having an average molecular weight of 300 to 1200, and (b) microcrystalline wax, (a) :( b) = 60: 40 to 99.9:
A wax composition mixed at a mass ratio of 0.1.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

The Fischer-Tropsch wax (a) is a synthetic waxy hydrocarbon produced by the Fischer-Tropsch process. The average molecular weight of the wax used in the present invention is 300 to 1200. The preferred average molecular weight is 400 to 1100, and the particularly preferred average molecular weight is 500 to 700. When the average molecular weight is less than 300, the solidifying power of the liquid oil becomes low. Average molecular weight of 1200
If it exceeds, the melting point is too high and the production becomes difficult. The average molecular weight means a number average molecular weight determined by a conventional method.
It does not matter if the number average molecular weight of the wax satisfies the above range, but a wax having a sharp molecular weight distribution curve is preferable so that the molecular weight distribution approaches monodispersion.

A commercially available Fischer-Tropsch wax can be used. Specifically, the average molecular weight is 300
The following commercially available products of １1200 are used. "Paraflint C77", "Paraflint C80", "Paraflint H"
1 "(both manufactured by Schumann Sasol). "FT1
00 "and" MDP-7010 "(both manufactured by Nippon Seiro Co., Ltd.). The amount of the component (a) is appropriately determined depending on the amount of the component (b) so as to satisfy the mass ratio which is a requirement of the present invention.
To 29.97% by mass, preferably 0.6 to 19.98% by mass, and more preferably 3.0 to 14.98% by mass.

The microcrystalline wax (b) is a hydrocarbon widely used in cosmetics such as lipstick and cream. Preferably the melting point is 70 ° C or higher and lower than 100 ° C,
More preferably, microcrystalline wax having a temperature of 80 ° C. or more and 95 ° C. or less is used. Commercially available products can be used in the present invention. The blending amount of the component (b) is appropriately determined, but is usually 0.01 to 12% by mass, preferably 0.05 to 8% by mass, and more preferably 0.25% by mass based on the total amount of the solid cosmetic.
６6% by mass.

The components (a) and (b) are combined with (a):
(B) A wax composition mixed at a mass ratio of 60:40 to 99.9: 0.1 is used as a solid agent in the solid cosmetic of the present invention. The preferred mass ratio is (a) :( b) = 8
0:20 to 99.8: 0.2. A more preferable mass ratio is (a) :( b) = 90: 10 to 95: 5.
When the component (a) and the component (b) are mixed at the above-mentioned mass ratio, the product hardness has a critical significance, and the wax composition exhibits an extremely excellent effect as a solid agent. Mixing is
What is necessary is just to stir the component (a) and the component (b) at the above-mentioned mass ratio. The mixed wax composition may be blended with a solid cosmetic. Further, the solid cosmetic may be produced by separately mixing the component (a) and the component (b) with the liquid oil and stirring.

The wax composition can give a sufficient hardness to the solid cosmetic even with a small amount of the compound, so that the spread and gloss of the liquid oil are not impaired and a solid cosmetic having excellent shape retention can be provided. Furthermore, in the production of solid cosmetics, there is no problem from the viewpoint of the melting point. Since the wax composition of the present invention has an excellent effect as a solid agent, it has a large use value as a substitute for a conventional solid agent (particularly, ceresin which is frequently used).

The amount of the wax composition (the total amount of the components (a) and (b)) is appropriately determined depending on the type of the solid cosmetic. 0.1 to 3 based on the total amount of solid cosmetic
It is preferably 0% by mass, more preferably 1 to 20% by mass, and particularly preferably 5 to 15% by mass. If the amount is less than 0.1% by mass, the composition does not function as a solid agent, and a problem may occur in the shape retention of the product. 30% by mass
If it exceeds, the product may be too hard or the gloss may be hindered.

The liquid oil used in the present invention is at room temperature (15 ° C.)
Is a liquid oil. It is not limited as long as it is a liquid oil used in a solid cosmetic. Preferred liquid oils are as follows. Glyceryl tri-2-ethylhexanoate, glyceryl diisostearate, diisostearyl malate, dimethylpolysiloxane, decamethylpentasiloxane, macadamia nut oil, trimethylolpropane trioctanoate, diglyceryl triisostearate, oxystearyl oxystearate, jojoba oil, squalane , Liquid lanolin, tri (hydrogenated rosin / isostearate) glyceryl, methylphenylpolysiloxane, glyceryl triisostearate, polybutene. For lipstick, liquid lanolin, tri (hydrogenated rosin / isostearate) glyceryl, methylphenylpolysiloxane, glyceryl triisostearate, and polybutene are particularly preferable. A volatile liquid oil (a cyclic silicone oil such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, or dodecamethylcyclohexasiloxane) is also preferable for improving the makeup of the lipstick. The amount of the liquid oil is usually 30 to 99.9% by mass based on the total amount of the solid cosmetic,
Preferably it is 50 to 99% by mass. When the blending amount of the liquid oil is small, the spread tends to deteriorate, so the blending amount is preferably 50% by mass or more. The solid cosmetic of the present invention may contain, in addition to the liquid oil, a solid oil and a semi-solid oil, if necessary.

The solid cosmetic of the present invention may contain, if necessary, other waxes, other oils, humectants, preservatives, antioxidants, in addition to the above essential components, as long as the effects of the present invention are not impaired. , An ultraviolet absorber, a polymer, a surfactant, a dye, a pigment, a powder, a drug, an alcohol, a solvent, and a fragrance are appropriately blended, and the mixture can be produced by a conventional method according to the type of product.

Specific examples of the solid cosmetic of the present invention are as follows. Makeup cosmetics such as lipstick, lip gloss, lip balm, foundation, and eye shadow. Hair cosmetics such as hair sticks and pomades. It is not limited as long as it is a solid cosmetic. A stick-shaped solid cosmetic is preferred. In particular, a lipstick containing a powder coloring material is preferable.

The solid cosmetic composition of the present invention achieves excellent shape retention and feeling of use by the wax composition comprising the component (a) and the component (b) having a specific average molecular weight. The reason is unknown, but is presumed as follows. That is, in the solid cosmetics composed of the wax and the liquid oil, fine crystals of the wax are connected to each other in a network to form a skeleton. A liquid oil component is contained in the skeleton, and the whole is kept in a solid state. Since the structure and properties of the solid cosmetics are affected by the microcrystalline structure and size of the wax and the type of the liquid oil, the wax composition of the present invention is presumed to have optimal shape retention and feel. It is presumed that the liquid oil is solidified.

[0020]

EXAMPLES Next, the present invention will be described more specifically with reference to examples, but the present invention is not limited to the following examples. Unless otherwise specified, the amounts are shown in mass%.

"Solid Agent: Wax Composition" The liquid oil was solidified by wax compositions having different mixing ratios of the components (a) and (b). The component (a) has an average molecular weight of 530.
Fischer-Tropsch wax (Paraflint C77 manufactured by Schumann Sazole) was used. The hardness of a solid obtained by mixing 10% by mass of the wax composition and 90% by mass of a liquid oil (glyceryl tri-2-ethylhexanoate) (which can be directly applied as lip gloss) was measured. The hardness meter used was a card meter (model M-301AR) manufactured by Iio Electric Co., Ltd. A sample left at 37 ° C. for 1 hour was measured with a pressure-sensitive axis of 3φ and a weight of 800 g.

The results are shown in Table 1. The amount of wax in the table is the concentration in the wax composition. As is clear from the results, the mixing ratio is (a) :( b) = 60: 40-9.
9.9: 0.1, preferably (a) :( b) = 80:
20-99.8: 0.2, more preferably (a):
(B) When the ratio is 90:10 to 95: 5, the hardness of the solid material increases dramatically. When the mixing ratio of the wax composition is within the above range, the composition exhibits remarkable hardness, and in the present invention, the above value has a critical significance. It is an unpredictable fact that the hardness of the liquid oil solid has a maximum value when the component (a) and the component (b) are mixed, and the wax composition having a mixing ratio showing the maximum value Are preferred. Further, the melting point of the wax composition has no problem in production.

[0023]

[Table 1]

"Solid cosmetics" Solid cosmetics shown in the respective tables were produced, and the effects of the present invention were examined. [Method for producing solid cosmetics of Tables 2 to 9]
And mixed with a disperser. This mixture was degassed, poured into a mold or a container, and cooled to produce a solid cosmetic. [Method for producing lipstick in Table 10] (1) to (7), (10) to
Each component of (16) was dissolved at 90 to 100 ° C and mixed with a disperser. (8) and (9) were added to this mixture and dispersed. After degassing, the mixture was poured into a lipstick container and cooled to produce an emulsified stick lipstick.

The Fischer-Tropsch wax used in the formulations of Tables 2 to 10 is as follows. “Fischer-Tropsch wax (1)” → “Paraflint C77 (number-average molecular weight 530)” “Fisher-Tropsch wax (2)” → “Paraflint C80 (number-average molecular weight 630)” “Fischer-Tropsch wax (3)” → “ Paraflint H1 (number average molecular weight 1060) "

[Retainability] Evaluation was made visually. (Evaluation criteria) ：: Excellent (excellent solid state) ○: Somewhat excellent (somewhat excellent solid state) △: Inferior (pasty to soft) ×: Extremely inferior (liquid)

[Expansion at the time of application] Specialized panelist (20
5) performed a five-level sensory evaluation (score) using a solid cosmetic. Judgment was made according to the following evaluation criteria based on the average value of the scores. (Score) 5 points: The spread at the time of application is light 4 points: The spread at the time of application is slightly light 3 points: The spread at the time of application is normal 2 points: The spread at the time of application is slightly heavy 1 point: The spread at the time of application is heavy (Evaluation criteria) ：: Score (average value) 4.0 or more and 5.0 points or less ：: Score (average value) 3.0 or more and less than 4.0 points △: Score (average value) 2.0 or more and 3.0 Less than point ×: Score (average value) 1.0 or more and less than 2.0 points

[Gloss] Using a solid cosmetic, a professional panelist (20 persons) performed a five-point sensory evaluation (score). Judgment was made according to the following evaluation criteria based on the average value of the scores. (Score) 5 points: glossy 4 points: glossy 3 points: glossy 2 points: glossy 1 point: glossy (Evaluation criteria) ◎: score (average value) 4.0 or more 5.0 points or less ○: Score (average value) 3.0 or more and less than 4.0 points Δ: Score (average value) 2.0 or more and less than 3.0 points ×: Score (average value) 1.0 or more and 2. Less than 0 points

Lipstick

[Table 2]

Lipstick

[Table 3]

Lip gloss

[Table 4]

Lip balm

[Table 5]

[0033] Foundation

[Table 6]

Eyebrow pencil

[Table 7]

Hair stick

[Table 8]

Lipstick

[Table 9] * 1: “Non-aqueous polymer dispersion A” A non-aqueous polymer dispersion prepared as follows was used. 15% by mass of methyl methacrylate monomer, 25% by mass of ethyl acrylate monomer, 0.1% by mass of polymerization initiator, 5% by mass of dimethylpolysiloxane graft polymer (molecular weight: about 150,000) as dispersion stabilizer Decamethylcyclopentasiloxane as dispersion medium 54.9% by mass and stirred at 120 ° C. for 10 hours to carry out polymerization. Next, after performing a demonomerization treatment under reduced pressure, the polymerization solution is cooled to 25 ° C., and a non-aqueous polymer dispersion using a volatile silicone having a milky white appearance and an average particle diameter of dispersed polymer particles of 1 μm as a dispersion medium. A was obtained.

Emulsified stick lipstick

[Table 10]

[0038]

(1) The solid cosmetic of the present invention is excellent in shape retention and feeling of use. In particular, it has excellent lipstick gloss and shape retention. (2) The wax composition of the present invention is an excellent solid agent for liquid oil. (3) According to the present invention, there is no production problem caused by using a high melting point wax.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) A61K 7/032 A61K 7/032 7/06 7/06 F term (Reference) 4C083 AA122 AB172 AB232 AB242 AB432 AB442 AC011 AC012 AC022 AC122 AC342 AC372 AC392 AC422 AC792 AD022 AD152 AD162 AD172 AD492 AD512 AD532 CC13 CC14 CC33 DD11 DD21 DD27 DD28 EE06 EE07 EE11 FF05

Claims (5)

[Claims] 1. A method according to claim 1, wherein (a) a Fischer-Tropsch wax having an average molecular weight of 300 to 1200 and (b) a microcrystalline wax are used: (a) :( b) = 60: 40 to 9
A solid cosmetic containing a mass ratio of 9.9: 0.1. 2. The solid cosmetic according to claim 1, further comprising a liquid oil component. 3. The solid cosmetic according to claim 1, which contains only the wax according to claim 1 as a solid agent. 4. The solid cosmetic according to claim 1, wherein the solid cosmetic is a lipstick further containing a coloring agent. 5. A method comprising: (a) a Fischer-Tropsch wax having an average molecular weight of 300 to 1200 and (b) a microcrystalline wax, (a) :( b) = 60: 40 to 9
A wax composition mixed at a weight ratio of 9.9: 0.1.