JP2009179564A - Oily solid cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oily solid cosmetic giving sufficient hardness to a product by a small blending amount of wax, having an excellent shape-holding property and excellent in usability such as spreadability, glossiness, etc. <P>SOLUTION: This oily solid cosmetic is provided by containing ≥0.1 and ≤8 mass% rice bran wax, and setting the total amount of the wax in the cosmetic to ≥5 and ≤8 mass%. Both of the iodine value and acid value of the rice bran wax are preferably ≤3.0. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an oily solid cosmetic, and more particularly to an oily solid cosmetic excellent in shape retention and usability.

As oily solid cosmetics, for example, lipstick, gloss, lip balm, foundation, stick foundation, pencil-type cosmetics, and hair sticks are known.
These include a liquid oil (for example, castor oil, jojoba oil, squalane, lanolin, various synthetic ester oils, liquid paraffin, silicone oil) and a semi-solid oil (for example, lanolin fatty acid octyldodecyl, petroleum jelly) and a wax (solid agent: for example, , Carnauba wax, candelilla wax, ceresin, microcrystalline wax, hardened animal oil, hardened vegetable oil, beeswax), and powder and optionally emulsified particles are dispersed (for example, Patent Documents 1 to 3).

JP 2002-302415 A JP 2006-335747 A JP 2006-248997 A

  The oily-type solid cosmetics must satisfy the required shape-retaining property and feeling of use (particularly, the spread and gloss when applied) by adjusting the mixing ratio of the wax and the liquid oil.

However, it is very difficult to satisfy both sufficient shape retention and usability at the same time. This is because the wax is an essential component for solidifying the liquid oil, and a sufficient amount must be blended in order to maintain the shape of the product during use (shape retention). However, if the amount of the wax is large, the spread at the time of application becomes heavy, and the glossy feeling that is exhibited by the liquid oil is reduced.
Therefore, due to this contradiction phenomenon, it is extremely difficult to provide an oily solid cosmetic that satisfies both the shape retention and the feeling of use.

Oil-based solid cosmetics with excellent shape retention and feeling of use have been demanded by the market for many years, and development efforts by many researchers have been made.
For example, as one of the methods for solving the above-mentioned problems, a method of solidifying a liquid oil component with a wax that provides sufficient shape retention with a small amount (a wax that increases hardness with a small amount) can be considered. However, since such a wax has a high melting point, there is a problem that it is difficult to produce a product.
The present invention has been made in response to such a conventional situation, and an object thereof is to provide an oily solid cosmetic material that is extremely excellent in shape retention and usability.

  As a result of intensive studies to solve the above problems, the present inventor has found that when the rice bran wax is blended in an amount of 0.1% by mass or more and 8% by mass or less, the total amount of wax in the cosmetic is 5% by mass or more and 8% by mass. It was found that the oil-based solid cosmetic having excellent shape retention and excellent usability can be obtained without problems due to the high melting point described above.

  That is, the present invention is an oily solid cosmetic comprising rice bran wax in an amount of 0.1% by mass to 8% by mass, and the total amount of wax in the cosmetic is 5% by mass to 8% by mass. .

  The oily solid cosmetic of the present invention gives a product with sufficient hardness by using a specific amount of a specific wax, and has excellent shape retention and ease of use such as stretch and gloss. It becomes possible to provide an oily solid cosmetic.

Hereinafter, the present invention will be described in detail.
The rice bran wax used in the present invention can be obtained by purifying a dewax obtained by extracting from rice bran. Depending on the degree of purification, the color varies from yellow to white, and the acid value and iodine value differ, but rice bran wax having an iodine value and acid value of 3.0 or less is preferred.

  When rice bran wax has an iodine value and an acid value of 3.0 or less, particularly excellent shape retention and good usability such as stretch and gloss can be obtained.

  The compounding amount of rice bran wax in the oily solid cosmetic of the present invention is 0.1% by mass or more and 8% by mass or less. When blended in such a blending amount range, the total amount of wax in the cosmetic is 5% by mass or more and 8% by mass or less, having a sufficient shape retention even at a considerably lower concentration than before, and extending, Oily solid cosmetics with excellent usability such as gloss can be obtained.

  The rice bran wax of the present invention has sufficient hardness even if it is blended singly, but further contains one or more waxes selected from microcrystalline wax, paraffin wax, Fischer-Tropsch wax, polyethylene wax and candelilla wax. When added in an amount of 1 to 100% by weight based on rice bran wax, an oily solid cosmetic having higher shape retention and excellent usability can be obtained as compared with the case of adding rice bran wax alone. The candelilla wax here may be one having a high degree of purification for the purpose of deodorization, decolorization, and the like. Further, in order to obtain an oily solid cosmetic having more excellent shape retention and usability, the average carbon number of the paraffin wax and Fischer-Tropsch wax used is preferably 30 or more and 40 or less, more preferably 34 or more and 38 or less. is there.

  When the mass ratio of the wax to rice bran wax is less than 1% by mass or more than 100% by mass, a sufficient hardness increasing effect by addition and the characteristics of the product itself may not be clearly obtained.

  The oily solid cosmetic of the present invention is mixed with a liquid oil component at room temperature (15 ° C.). Such oil is not particularly limited as long as it is a liquid oil used in solid cosmetics. For example, glyceryl tri-2-ethylhexanoate, glyceryl diisostearate, diisostearyl malate, dimethylpolysiloxane, decamethylpentasiloxane, macadamia nut oil, trimethylolpropane trioctanoate, diglyceryl triisostearate, oxystearyl oxystearate, jojoba oil , Squalane, liquid lanolin, methylphenyl polysiloxane, glyceryl triisostearate, pentaerythritol tetra-2-ethylhexanoate, polybutene, castor oil and the like.

Particularly for lipsticks, liquid lanolin, methylphenyl polysiloxane, glyceryl triisostearate, polybutene and the like having a high refractive index are preferable.
In order to improve the long-lasting makeup, cyclic silicone oils such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane, which are volatile liquid oils, are also preferable.

  In addition to the liquid oil, the oily solid cosmetic of the present invention may be used in combination with a solid oil or a semi-solid oil as needed for the purpose of improving the feeling and the feeling. Examples of semi-solid oils include dimer dilinoleic acid di (phytosteryl / isosteryl / cetyl / stearyl / behenyl), lanolin fatty acid octyldodecyl, etc. Solid oils other than rice bran wax include paraffin wax, polyethylene wax, and Fischer-Tropsch wax. And microcrystalline wax.

  In the present invention, a liquid oil or a semi-solid oil is blended. Among oils, oils having an oil viscosity of 1000 mPa · s or more and 20000 mPa · s or less, such as diisostearyl malate, triisostearan glyceryl, N-lauroyl-L-glutamate di (phytosteryl-2-octyldodecyl), One or two or more kinds of oils selected from dimer dilinoleic acid di (phytosteryl / isosteryl / cetyl / stearyl / behenyl) which is a semi-solid oil is preferable, and when such oil is blended in an amount of 5% by mass to 50% by mass Thus, an oily solid cosmetic material that is particularly excellent in terms of shape retention and usability can be obtained. If it is less than 5% by mass, it is difficult to obtain the effect, and if it exceeds 50% by mass, production may be difficult.

  In addition to the above essential components, the oily solid cosmetics of the present invention may contain other waxes, other oils, moisturizers, antiseptics, antioxidants, ultraviolet rays, as long as the effects of the present invention are not impaired. Absorbers, polymers, surfactants, dyes, pigments, powders, drugs, alcohols, solvents, and fragrances can be blended as appropriate, and can be produced by conventional methods according to the type of product.

  Specific examples of the oily solid cosmetic of the present invention include makeup cosmetics such as lipsticks, lip glosses, lip balms, foundations, teaks, funniers, and eye shadows. Hair cosmetics such as hair sticks and pomades are listed. Although it will not specifically limit if it is an oily solid cosmetic, A stick-like oily solid cosmetic is preferable, and especially the lipstick, foundation, eye shadow, and teak which mix | blend a powder coloring material are preferable.

  The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto. Unless otherwise specified, the amount is shown in mass%.

Examples 1 to 20, Comparative Example 1
With the prescription shown in the following Tables 1 to 11, oily solid cosmetics were produced, and the effects were examined by an evaluation method described later. The results are also shown in Tables 1 to 11.
As the rice bran wax used in the formulations of Tables 1 to 11, rice bran wax (1) is a commercially available purified rice bran wax (TOWAX-3p3: Toa Kasei Co., Ltd.) (iodine value: 1.3, acid value: 1.0), Rice bran (2) used had an iodine value of 6 and an acid value of 7. The average carbon number of Fischer-Tropsch wax (1) is about 35, and the average carbon number of Fischer-Tropsch wax (2) is about 39.

[Methods for producing oil-based solid cosmetics of Tables 1-8 and Tables 10-11]
Each component was dissolved at 120 ° C. and mixed with a disperser. This mixture was deaerated, poured into a mold or a container, and cooled to produce a solid cosmetic.

[Method for producing lipstick in Table 9]
The components (1) to (7) and (10) to (18) were dissolved at 90 to 100 ° C. and mixed with a disperser. (8) and (9) were added to this mixture and dispersed. This was deaerated and then poured into a lipstick container and cooled to produce an emulsified stick lipstick.

[Shape retention]
Visual evaluation was made.
(Evaluation criteria)
A: Excellent (excellent solid state)
○: Slightly superior (slightly superior solid state)
Δ: Inferior (paste-like to soft)
X: Extremely inferior (liquid)

[Growth during application]
Special panelists (20 persons) performed a 5-step sensory evaluation (score) using solid cosmetics. The average score was determined according to the following evaluation criteria.
(Score)
5 points: Light spreading during application.
4 points: The spread during application is slightly light.
3 points: Normal spread during application.
2 points: The spread during application is slightly heavy.
1 point: The spread during application is heavy.

(Evaluation criteria)
A: 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 Δ: Score (average value) 2.0 or more and less than 3.0 points ×: Score (average value) 1.0 or more and less than 2.0 points

[luster]
Special panelists (20 persons) performed a five-step sensory evaluation (score) using solid cosmetics. The average score was determined according to the following evaluation criteria.
(Score)
5 points: There is gloss.
4 points: Slightly glossy.
3 points: Normal gloss.
2 points: Not glossy.
1 point: No gloss.
(Evaluation criteria)
A: 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 Δ: Score (average value) 2.0 or more and less than 3.0 points ×: Score (average value) 1.0 or more and less than 2.0 points

  As can be seen from Tables 1 to 11, the oily solid cosmetic of the present invention is excellent in shape retention, spreading at the time of application, and gloss.

Claims (5)

  An oily solid cosmetic comprising 0.1% by mass or more and 8% by mass or less of rice bran wax, wherein the total amount of wax in the cosmetic is 5% by mass or more and 8% by mass or less.   The oily solid cosmetic according to claim 1, wherein the rice bran wax has an iodine value and an acid value of 3.0 or less.   Further, one or more kinds of waxes selected from microcrystalline wax, paraffin wax, Fischer-Tropsch wax, polyethylene wax and candelilla wax are blended in an amount of 1% by mass to 100% by mass with respect to the rice bran wax. The oily solid cosmetic according to claim 1, wherein   The oily solid cosmetic according to claim 3, wherein the paraffin wax and the Fischer-Tropsch wax have an average carbon number of 30 or more and 40 or less.   One or two selected from diisostearyl malate, triisostearin sanglyceryl, N-lauroyl-L-glutamate di (phytosteryl 2-octyldodecyl), dimer dilinoleate (phytosteryl / isosteryl / cetyl / stearyl / behenyl) The oily solid cosmetic according to any one of claims 1 to 4, wherein the oil component of at least a seed is blended in an amount of 5% by mass or more and 50% by mass or less.