JP2024012081A - Oily solid cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oily solid cosmetic which can be applied smoothly at a low temperature, does not collapse when applied at a high temperature, and maintains the shape even at a high temperatures of 60°C.

SOLUTION: There is provided an oily solid cosmetic which comprises (A) a synthetic hydrocarbon wax having a melting point of 90°C or more and (B) a hydrocarbon wax having a melting point of 50°C or more and 75°C or less, wherein the total bended amount of (A) a polyethylene wax and (B) a hydrocarbon wax is 8 mass% or more and 13 mass% or less based on the total amount of the oily solid cosmetic, the mass ratio (B)/[(A)+(B)] of the hydrocarbon wax (B) to the total blended amount of the polyethylene wax (A) and the hydrocarbon wax (B) is 50% or more and 70% or less, the hydrocarbon wax (B) contains less than 1 mass% of a microcrystalline wax based on the total amount of the oily solid cosmetic and has a penetration hardness of 40 g or more and 200 g or less as measured with a hardness meter.

SELECTED DRAWING: None

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to an oil-based solid cosmetic.

Oil-based solid cosmetics such as lip cosmetics such as lipsticks and glosses, makeup cosmetics such as cheeks and eye shadows, and cleansing cosmetics are mainly composed of oils such as solid oils, semi-solid oils, and liquid oils, and are filled in containers. , is a type of cosmetic that is molded. Oil-based solid cosmetics can have various physical properties by selecting the oil agent, adjusting the blending amount, or preparing various additives.

For example, wax, which is a solid oil, is an essential component for solidifying liquid oil, and must be blended in a sufficient amount to maintain the shape of the product during use (shape retention). However, when the amount of wax blended is large, the coating may feel hard during application and may not spread well. On the other hand, if the amount of wax blended is drastically reduced in order to reduce hardness and obtain a smooth feeling of use, creases are likely to occur, resulting in an oil-based solid cosmetic that is unsatisfactory in terms of shape retention and stability over time. I couldn't get it.

Therefore, by combining polyethylene wax and microcrystalline wax, an oil-based solid cosmetic has been proposed that has shape retention and usability (stretchability and gloss upon application) even with a small amount of wax (Patent Document 1). ). However, when microcrystalline wax is blended, even if the elongation at room temperature is improved, the stability over time may be lowered, and the elongation at low temperatures such as in winter may become worse.

Japanese Patent Application Publication No. 2008-133205

Furthermore, when improving the usability at low temperatures, the formulation becomes too soft at high temperatures such as in the summer, and may not maintain its shape during application and may collapse. Therefore, it has been extremely difficult to provide an oil-based solid cosmetic that is expected to be used in a wide temperature range and that satisfies the feeling of use, shape retention, and stability over time. In particular, it was very difficult to apply smoothly even at low temperatures, not crumble when applied at high temperatures, and maintain the shape even at high temperatures such as 60°C.

Therefore, the present invention was made in view of the above problems, and it can be applied smoothly even at low temperatures, does not collapse when applied even at high temperatures, and maintains its shape even at high temperatures such as 60 degrees Celsius. The purpose of the present invention is to provide an oil-based solid cosmetic.

As a result of intensive studies to solve the above problems, the present inventors have determined that a synthetic hydrocarbon wax with a melting point of 90°C or higher and a predetermined hydrocarbon wax with a melting point of 50°C or higher and 75°C or lower are used in a predetermined ratio. It was discovered that by combining these, it is possible to obtain an oil-based solid cosmetic that can be applied smoothly even at low temperatures, does not crumble when applied even at high temperatures, and maintains its shape even at high temperatures such as 60°C. .

(1) One aspect of the present invention is
(A) a synthetic hydrocarbon wax with a melting point of 90°C or higher;
(B) an oil-based solid cosmetic comprising a hydrocarbon wax with a melting point of 50° C. or higher and 75° C. or lower,
The total blending amount of (A) synthetic hydrocarbon wax and (B) hydrocarbon wax is 8% by mass or more and 13% by mass or less based on the total amount of the oil-based solid cosmetic;
The mass ratio (B)/[(A)+(B)] of (B) hydrocarbon wax to the total blending amount of (A) synthetic hydrocarbon wax and (B) hydrocarbon wax is 50% or more and 70% or less. ,
(B) The hydrocarbon wax contains microcrystalline wax in an amount of less than 1% by mass based on the total amount of the oil-based solid cosmetic,
The oil-based solid cosmetic has a needle penetration hardness of 40 g or more and 200 g or less on a hardness meter.

(B) The hydrocarbon wax preferably contains microcrystalline wax in an amount of 0.5% by mass or less based on the total amount of the oil-based solid cosmetic.

(2) In the aspect of (1) above, it may further contain (C) liquid oil and (D) paste oil.

(3) In the embodiment (1) above, component (B) preferably contains paraffin wax.

(4) In the aspect of (2) above, the blending amount of (C) liquid oil is 40% by mass or more and 90% by mass or less based on the total amount of the oil-based solid cosmetic;
(D) The blending amount of the paste oil agent is preferably 2% by mass or more and 40% by mass or less based on the total amount of the oily solid cosmetic.

(5) In the aspect of (1) above, the oil-based solid cosmetic of the present invention may be a lip cosmetic.

According to the present invention, it is possible to provide an oil-based solid cosmetic that can be applied smoothly even at low temperatures, does not crumble when applied even at high temperatures, and maintains its shape even at high temperatures such as 60°C. can.

Embodiments of the present invention will be described in detail below. Note that the solid cosmetic in the present invention means a composition that has no fluidity at room temperature (15° C. to 25° C.) and normal pressure.

<(A) Synthetic hydrocarbon wax with a melting point of 90°C or higher>
(A) The synthetic hydrocarbon wax has a melting point of 90°C or higher, more preferably 92°C or higher and 104°C or lower. These (A) synthetic hydrocarbon waxes are not particularly limited as long as they can be used in cosmetics and quasi-drugs, and may be used alone or in an appropriate combination of two or more. Furthermore, when two or more types of synthetic hydrocarbon waxes are used, the melting points of all of the waxes are 90°C or higher. If the wax has a range of melting points, the central value is taken as the melting point of the synthetic hydrocarbon wax.

(A) The synthetic hydrocarbon wax having a melting point of 90° C. or higher may be a commercially available product or one synthesized according to a conventional method. Commercially available products include, for example, PERFORMALENE PL POLYETHYLENE, PERFORMALENE 400, 500, 655, and 700EP manufactured by NEW PHASE TECHNOLOGIES, and SUNWAX 151-P, 171-P, and 131-P manufactured by Sanyo Chemical Industries, Ltd. , 161 -P, LIPWAX A-4 manufactured by Japan Natural Products Co., Ltd., and SASOLWAX H1, H1N6, H1N8, H8, C105, H105, and H5 manufactured by SASOL.

(A) The amount of synthetic hydrocarbon wax having a melting point of 90° C. or higher is preferably 4% by mass or more, more preferably 5% by mass or more, based on the total amount of the oil-based solid cosmetic, from the viewpoint of shape retention. Further, from the viewpoint of obtaining a sufficient coating amount, the amount is preferably 9% by mass or less, and more preferably 8% by mass or less.

<(B) Hydrocarbon wax with a melting point of 50°C or higher and 75°C or lower>
(B) The hydrocarbon wax has a melting point of 50°C or more and 75°C or less, more preferably 53°C or more and 71°C or less. (B) The hydrocarbon wax is not particularly limited as long as it can be used in cosmetics or quasi-drugs, and examples include paraffin wax, microcrystalline wax, polyethylene wax, ethylene propylene copolymer, ceresin, ozokerite, and Fischer-Tropsch. Examples include wax. Among these, paraffin wax is preferred from the viewpoint of elongation and stability at low temperatures. (B) The hydrocarbon wax may be used alone or in an appropriate combination of two or more. Further, when two or more types of hydrocarbon waxes are used, the melting points of all the waxes are 50°C or more and 75°C or less. If the wax has a range of melting points, the central value is taken as the melting point of the hydrocarbon wax.
Further, in the oil-based solid cosmetic of the present invention, the hydrocarbon wax (B) contains microcrystalline wax in an amount of less than 1% by mass based on the total amount of the oil-based solid cosmetic. The microcrystalline wax is preferably contained in an amount of 0.5% by mass or less, even more preferably 0.3% by mass or less, and 0.1% by mass or less based on the total amount of the oil-based solid cosmetic. is even more preferable, and it is particularly preferable that it is not included.

(B) The hydrocarbon wax may be a commercially available product or one synthesized according to a conventional method. Commercially available products include, for example, paraffin wax 125, 130, 135, 140, 150, 155 manufactured by Nippon Seiro Co., Ltd., HNP-3, 5, 9, 10, 11, 12, manufactured by Cirebelle Fine Chemicals Pty Ltd. Examples include CireWax60.

(B) The blending amount of hydrocarbon wax with a melting point of 50°C or more and 75°C or less is preferably 5% by mass or more, and 7% by mass based on the total amount of the oil-based solid cosmetic from the viewpoint of elongation and stability at low temperatures. % or more is more preferable.

In addition, the total blending amount of (A) synthetic hydrocarbon wax and (B) hydrocarbon wax should be 8% by mass or more and 13% by mass or less based on the total amount of the oil-based solid cosmetic from the viewpoint of feeling of use and shape retention. be. More preferably, it is 10% by mass or more and 12% by mass or less.

Furthermore, the mass ratio (B)/[(A)+(B)] of (B) hydrocarbon wax to the total blending amount of (A) synthetic hydrocarbon wax and (B) hydrocarbon wax is the point of stability over time. and is 50% or more and 70% or less. More preferably, it is 55% or more and 65% or less.

<(C) Liquid oil>
(C) Liquid oil is an oily component that is liquid at room temperature (25°C). (C) The liquid oil is not particularly limited as long as it can be used in cosmetics and quasi-drugs, and examples include hydrocarbon oils such as liquid paraffin, squalane, polybutene, and heavy liquid isoparaffin, and cetyl ethylhexanoate. , ester oils such as isotridecyl isononanoate and diisostearyl malate, triglycerides such as triethylhexanoin, olive oil and castor oil, higher alcohols such as octyldodecanol, higher fatty acids such as isostearic acid, methylpolysiloxane, and highly polymerized methylpolysiloxane. Examples include silicone oils such as siloxane and methylcyclopolysiloxane. (C) The liquid oil may be used alone or in an appropriate combination of two or more.

(C) As the liquid oil, hydrocarbon oils and ester oils are preferred in order to provide a smooth feel when used at low temperatures.

The amount of liquid oil (C) to be blended is preferably 40% by mass or more, more preferably 50% by mass or more, based on the total amount of the oil-based solid cosmetic, from the viewpoint of elongation at low temperatures. Further, in terms of shape retention at high temperatures, the content is preferably 90% by mass or less, more preferably 80% by mass or less.

<(D) Paste oil>
(D) Paste oil is an oily component that is semi-solid at room temperature (25°C). The semi-solid oily component is an oily component that is neither the solid oil nor the liquid oil among all oily components. (D) The paste oil agent preferably has a melting point of 30°C or more and 61°C or less from the viewpoint of adhesion on the skin. (D) Paste oils are not particularly limited as long as they can be used in cosmetics and quasi-drugs, and examples include petrolatum, hard lanolin, reduced lanolin, cholesteryl hydroxystearate, phytosteryl oleate, hexa(behenic acid) / benzoic acid / ethylhexanoate) dipentaerythrityl, tetra (hydroxystearic acid / isostearic acid) dipentaerythrityl, hexahydroxystearic acid dipentaerythrityl, hexa (hydroxystearic acid / stearic acid / rosin acid) dipentaerythrityl, tri (caprylic acid / capric acid / myristic acid) Glyceryl (ethylhexanoate/stearate/adipate), di(octyldodecyl/phytosteryl/behenyl) lauroylglutamate, dimer dilinoleic acid (phytosteryl/isostearyl/cetyl/stearyl/behenyl), Examples include dimer dilinoleyl bis(behenyl/isostearyl/phytosteryl) dilinoleic acid, bisdiglyceryl polyacyl adipate-2, and mixed fatty acid ester of diglyceryl adipate. They may be used alone or in a suitable combination of two or more.

(D) The paste oil agent preferably contains vaseline and pentaerythritol fatty acid ester from the viewpoint of improving the moisturizing effect. As the pentaerythritol fatty acid ester, dipentaerythrityl hexahydroxystearate and dipentaerythrityl hexa(hydroxystearic acid/stearic acid/rosin acid) are preferred, and dipentaerythrityl hexahydroxystearate is more preferred.

(D) The blending amount of the paste oil is preferably 2% by mass or more, more preferably 10% by mass or more, based on the total amount of the oily solid cosmetic, from the viewpoint of shape retention at high temperatures. Further, from the viewpoint of feeling when used at low temperatures, the content is preferably 40% by mass or less, more preferably 30% by mass or less.

<(E) Other ingredients>
The oil-based solid cosmetic of the present invention may contain fragrances, antifoaming agents, preservatives, antioxidants, surfactants, moisturizing agents, and other ingredients, as necessary, in addition to the above-mentioned ingredients, to the extent that the effects of the present invention are not impaired. agent, aqueous component, deodorant component, activating component, anti-inflammatory component, anti-allergy component, whitening component, vitamins, component that prevents and/or repairs DNA damage, astringent component, active oxygen suppressing component, anti-aging component Ingredients: UV absorber, UV protectant, film forming agent, anti-fading agent, water repellent, texture improving powder, thickener, pigment, blood circulation promoter, cooling agent, plant extract, polymer latex, ceramide Components that can be added to cosmetics and quasi-drugs, such as anti-wrinkle components, pH adjusters, antioxidants, and preservatives, can be blended. Further, one or more types of these various components can be used.

The penetration hardness of the oil-based solid cosmetic of the present invention measured by a hardness meter is 40 g or more and 200 g or less. More preferably, it is 60 g or more and 130 g or less. If the penetration hardness is less than 40g, the shape retention will be weak and it will become mushy, and if it exceeds 200g, it will not be possible to apply it smoothly. The penetration hardness of the oil-based solid cosmetic according to the hardness tester of the present invention was measured using TEST EZ-SX 100N (manufactured by Shimadzu Corporation) at 25°C, adapter φ2mm, and Table Speed: 60mm/min. This is the measured value.

The oil-based solid cosmetics of the present invention are not particularly limited, and include, for example, lip cosmetics such as lipsticks, glosses, lip balms, lipstick base coats, and lipstick overcoats, cheeks, eyeshadows, eyebrows, eyeliners, foundations, concealers, and white powders. , makeup cosmetics such as makeup bases, cleansing cosmetics, etc., makeup cosmetics and lip cosmetics are preferred, and lip cosmetics that exhibit particularly excellent effects are more preferred.

The shape of the oil-based solid cosmetic of the present invention is not particularly limited, and examples thereof include a glass or plastic jar, a plate shape such as a metal plate, a pencil shape or a stick shape. Among these, by using it in a rod shape, effects such as shape retention are fully exhibited.

Moreover, the oil-based solid cosmetic of the present invention can be manufactured by a general method for manufacturing oil-based solid cosmetics.

EXAMPLES Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to these Examples. In addition, the blending amounts in the following Examples and the like indicate mass % unless otherwise specified.

(Examples 1 to 9, Comparative Examples 1 to 13)
Lip balms of Examples 1 to 9 and Comparative Examples 1 to 13 were prepared by the following method. That is, each component in Tables 1 and 2 was heated and dissolved at 110° C. to prepare an oil mixture. After confirming complete dissolution, the mixture was filled into a container and solidified by cooling to obtain a lip balm which is an oil-based solid cosmetic of the present invention.

The lip balms of Examples 1 to 9 and Comparative Examples 1 to 13 prepared as described above were evaluated using the following method.

[Test Example 1] Evaluation of stability over time The lip balms of Examples 1 to 9 and Comparative Examples 1 to 13 filled in containers were stored under a 24-hour heating and cooling cycle at -5°C⇔40°C, and test start 1 The penetration hardness on the first day and one month after the start of the test was evaluated according to the following criteria. The results are shown in Tables 1 and 2.

(penetration hardness)
Each lip balm (a stick with a diameter of approximately 12 m) was tested for needle penetration hardness ( gf) was measured. The ratio of the penetration hardness after one month to the penetration hardness on the first day was calculated and divided into the following three levels. The larger the value, the better the stability over time.
◎:＞74%
○: 40% or more and 74% or less ×: <40%

[Test Example 2] Evaluation of shape retention under high temperature The lip balms (sticks with a diameter of about 12 m) of Examples 1 to 9 and Comparative Examples 1 to 13 filled in containers were tested in a constant temperature room at 60°C for 24 hours. After storing the lip balm in an erect, horizontal, inverted, or upright position with the entire amount rolled up, the condition of the lip balm was visually observed and evaluated using the following criteria. The results are shown in Tables 1 and 2.
(Evaluation criteria)
〇: It retains its shape in upright, sideways, and inverted positions, and does not melt or crumble even in the upright position when the entire amount is raised.
△: It retains its shape in the upright, sideways, and inverted states, but has some melting and crumbling in the upright state when the entire amount is raised.
×: There is no shape retention in the upright, sideways, and inverted states, or there is melting or collapse in the upright state with the entire amount raised.

[Test Example 3] Evaluation of usability (smoothness) at low temperatures Seven healthy panelists evaluated the results of Examples 1 to 9 and Comparative Examples 1 to 13, which were left in a constant temperature room at a low temperature (5°C) for 3 hours or more. Immediately after taking the lip balm out of the constant temperature room, it was applied to the lips, and the feeling of use at low temperatures was evaluated on a four-point scale based on the following rating criteria. The results are shown in Tables 1 and 2.
(Scoring criteria)
◎: Good usability (smoothness) at low temperatures.
○: The usability (smoothness) at low temperatures is somewhat good.
Δ: Feeling of use (smoothness) at low temperatures is not very good.
×: Feeling of use (smoothness) at low temperatures is not good.

From Tables 1 and 2, as shown in Examples 1 to 9, the oil-based solid cosmetics of the present invention have a smooth feel when used at low temperatures, and have good shape retention and stability over time at high temperatures. is recognized. In particular, it can be seen that when the amount of microcrystalline wax blended is less than 1% by mass, the product has an excellent smooth feel when used at low temperatures. In addition, the oil-based solid cosmetic of Example 2 contains a predetermined amount of (A) synthetic hydrocarbon wax, (B) hydrocarbon wax, (C) liquid oil, and (D) paste oil, and contains (B) component. Since it contains 8% by mass of paraffin wax, it is excellent in that it can be applied generously even at low temperatures, does not crumble when applied even at high temperatures, and is easy to apply.

(Prescription example)
Examples of formulations of the oil-based solid cosmetic of the present invention are listed below. The present invention is not limited to these formulation examples.

(Prescription example 1: lipstick)
(1) Polyethylene wax (melting point 95-105°C) 5.0%
(2) Paraffin wax (melting point 68.3-70.9°C) 7.0
(3) Hydrogenated polyisobutene 5.0
(4) Diisostearyl malate 35.0
(5) Vaseline 15.0
(6) Dipentaerythrityl hexahydroxystearate 8.0
(7) Red No. 202 0.5
(8) Red No. 201 0.5
(9) Yellow No. 4 0.5
(10) Titanium oxide 0.2
(11) BHT 0.1
(12) Mineral oil residue

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications and variations can be made within the scope of the gist of the present invention as described in the claims. Changes are possible.

Claims (6)

(A) a synthetic hydrocarbon wax with a melting point of 90°C or higher;
(B) a hydrocarbon wax with a melting point of 50°C or more and 75°C or less;
An oil-based solid cosmetic comprising,
The total amount of the synthetic hydrocarbon wax (A) and the hydrocarbon wax (B) is 8% by mass or more and 13% by mass or less based on the total amount of the oil-based solid cosmetic;
The mass ratio (B)/[(A)+(B)] of the (B) hydrocarbon wax to the total blending amount of the (A) synthetic hydrocarbon wax and the (B) hydrocarbon wax is 50% or more 70 % or less,
The hydrocarbon wax (B) contains microcrystalline wax in an amount of less than 1% by mass based on the total amount of the oil-based solid cosmetic,
An oil-based solid cosmetic whose penetration hardness on a hardness meter is 40 g or more and 200 g or less. The oil-based solid cosmetic according to claim 1, wherein the hydrocarbon wax (B) contains microcrystalline wax in an amount of 0.5% by mass or less based on the total amount of the oil-based solid cosmetic. The oil-based solid cosmetic according to claim 1, further comprising (C) a liquid oil and (D) a paste oil. The oil-based solid cosmetic according to claim 1, wherein the component (B) contains paraffin wax. The blending amount of the liquid oil (C) is 40% by mass or more and 90% by mass or less based on the total amount of the oil-based solid cosmetic,
The oil-based solid cosmetic according to claim 3, wherein the blending amount of the paste oil (D) is 2% by mass or more and 40% by mass or less based on the total amount of the oil-based solid cosmetic. The oil-based solid cosmetic according to claim 1, which is a lip cosmetic.