Oily solid cosmetic and hardness improver for oily solid cosmetic

Abstract

The present invention provides an oily solid cosmetic characterized by containing component (1): one or more waxes selected from plant-based waxes that are solid at 25°C and animal-based waxes that are solid at 25°C, and component (3): an oligoester obtained by esterification of component A, which is glycerin, component (B), which is a C2-12 dicarboxylic acid, component (C), which is one or more fatty acids selected from the group consisting of caprylic acid, ethylhexanoic acid, isononanoic acid, isopalmitic acid, and isostearic acid, and component (D), which is one or more fatty acids selected from C10-24 linear saturated fatty acids, the oligoester being obtained by esterification of 0.65-0.8 mol of the component (B) and a total of 1.2-1.7 mol of the component (C) and the component (D) per mol of the component (A), the mass ratio of the component (C) and the component (D) used in the esterification being component (C):component (D)=10:90-99.9-0.1, and the oligoester having an acid value of 5 mg KOH / g or lower, a saponification value of 420-510 mg KOH / g, and a hydroxyl value of 60 mg KOH / g or lower.

Description

Oil-based solid cosmetics and hardness enhancers for oil-based solid cosmetics

[0001] The present invention relates to an oily solid cosmetic containing an oligoester.

[0002] In recent years, many naturally derived cosmetics have appeared on the market from the standpoint of safety and aesthetics. Amid this market trend, consumer demand for naturally derived oily solid cosmetics has also increased. For example, Patent Document 1 discloses an oily solid lip cosmetic that combines formability and usability by containing sunflower wax, a paste-like dimer acid ester, and a monoglycerin or polyglycerin ester. While the technology described in Patent Document 1 can combine formability and usability, it is difficult to achieve a glossy texture because it requires the inclusion of a large amount of paste oil. Furthermore, no consideration has been given to the prevention of oil stains.

[0003] Patent Document 2 discloses a lipstick composition that contains natural wax, mineral oil, and castor oil, thereby providing excellent aesthetic performance and lip protection. However, although the composition provides excellent aesthetic performance and lip protection, it has the problem of poor oxidative stability due to the large amount of castor oil it contains.

[0004] Patent Document 3 discloses a technology for improving shape retention even with a small amount of wax by using selected rice bran wax, but rice bran wax that meets this performance requirement is difficult to obtain, making it impractical.

[0005] Meanwhile, oligoesters have been used in cosmetics for a long time due to their skin moisturizing effect, high safety, and excellent pigment dispersibility. A typical example of an oligoester incorporated into cosmetics is an oligoester that functions as a gelling or solidifying agent for liquid oil (Patent Document 4).

[0006] Patent No. 7072845 JP 6-316509 JP 2009-179564 JP 7-126604

[0007] An object of the present invention is to provide an oily solid cosmetic that contains a vegetable wax or an animal wax, has excellent shape retention, is effective in inhibiting oil stains during use, and has a good feel when used. Another object of the present invention is to provide a hardness improver that has an excellent hardness-improving effect when mixed with the vegetable wax or the animal wax.

[0008] As a result of intensive research conducted by the present inventors to solve the above-mentioned problems, they discovered that an oligoester obtained by an esterification reaction between glycerin, a dicarboxylic acid having 2 to 12 carbon atoms, and a specific combination of two or more fatty acids has excellent shape retention, inhibition of oily stains during use, and a good feel when used, and also has excellent oxidation stability for an oil-based solid cosmetic composition containing a vegetable wax or an animal wax that is solid at 25°C, and thus completed the present invention.

[0009] That is, the present invention encompasses the following aspects: [1] Component (1): one or more waxes selected from vegetable waxes that are solid at 25°C and animal waxes that are solid at 25°C; and Component (3): an oligoester obtained by esterifying component (A) glycerin, component (B) a dicarboxylic acid having 2 to 12 carbon atoms, component (C) one or more fatty acids selected from the group consisting of caprylic acid, ethylhexanoic acid, isononanoic acid, isopalmitic acid, and isostearic acid, and component (D) one or more fatty acids selected from linear saturated fatty acids having 10 to 24 carbon atoms, wherein the esterification reaction is carried out in an amount of 0.65 to 0.8 moles of component (B) and 1.2 to 1.7 moles of the total amount of component (C) and component (D) per mole of component (A). a mass ratio of the component (C) to the component (D) used in the esterification reaction is component (C):component (D)=10:90 to 99.9:0.1, preferably component (C):component (D)=10:90 to 99:1, more preferably component (C):component (D)=25:75 to 99:1, even more preferably component (C):component (D)=40:60 to 99:1, still more preferably component (C):component (D)=40:60 to 70:30, most preferably component (C):component (D)=50:50 to 70:30, and also preferably component (C):component (D)=10:90 to 70:30; an oligoester having an acid value of 5 mgKOH / g or less, preferably 0 to 3 mgKOH / g, and more preferably 0 to 2 mgKOH / g, a saponification value of 420 to 510 mgKOH / g, preferably 420 to 490 mgKOH / g, and more preferably 430 to 490 mgKOH / g, and a hydroxyl value of 60 mgKOH / g or less, preferably 0 to 60 mgKOH / g, more preferably 0 to 40 mgKOH / g, even more preferably 0 to 35 mgKOH / g, and still more preferably 0 to 20 mgKOH / g.[2] The oil-based solid cosmetic according to [1] above, characterized in that the component (1) is one or more waxes selected from carnauba wax, rice bran wax, candelilla wax, sunflower seed wax, and beeswax. [3] The oil-based solid cosmetic according to [1] or [2] above, characterized in that the vegetable wax is one or more waxes selected from carnauba wax, rice bran wax, candelilla wax, and sunflower seed wax. [4] The oil-based solid cosmetic according to any one of [1] to [3] above, characterized in that the oil-based solid cosmetic does not contain any hydrocarbon wax (excluding vegetable waxes containing naturally-derived hydrocarbon components and animal waxes containing naturally-derived hydrocarbon components). [5] The oil-based solid cosmetic according to any one of [1] to [4] above, characterized in that the component (B) is succinic acid. [6] The oil-based solid cosmetic according to any one of [1] to [5] above, characterized in that the component (C) is caprylic acid. [7] The oil-based solid cosmetic preparation according to any one of [1] to [6] above, wherein the component (D) is capric acid. [8] The oil-based solid cosmetic preparation according to any one of [1] to [7] above, wherein the component (B) is succinic acid, the component (C) is caprylic acid, and the component (D) is capric acid. [9] The oil-based solid cosmetic preparation according to any one of [1] to [8] above, further comprising: component (2): an oil component that is liquid or pasty at 20°C (excluding component (3)).

[10] The oily solid cosmetic according to any one of [1] to [8] above, wherein the content of component (1) is 5 to 30% by mass, preferably 5% by mass or more and less than 30% by mass, more preferably 10 to 30% by mass, more preferably 10% by mass or more and less than 30% by mass, and even more preferably 14 to 20% by mass, relative to the total mass of the oily solid cosmetic, and the content of component (3) is 10 to 90% by mass, preferably 20 to 90% by mass, and more preferably 20 to 60% by mass.

[11] The oily solid cosmetic according to [9] or

[10] above, wherein the content of component (1) relative to the entire oily solid cosmetic is 5 to 30% by mass, preferably 5% by mass or more but less than 30% by mass, more preferably 10 to 30% by mass, more preferably 10% by mass or more but less than 30% by mass, and even more preferably 14 to 20% by mass; the content of component (2) is more than 0% by mass but not more than 60% by mass, preferably more than 0% by mass but not more than 50% by mass, and more preferably more than 0% by mass but not more than 40% by mass; and the content of component (3) is 10 to 90% by mass, preferably 20 to 90% by mass, and more preferably 20 to 60% by mass.

[12] The oily solid cosmetic according to any one of [9] to

[11] above, wherein the mass ratio of component (3) to the total amount of component (2) and component (3) ([content (g) of component (3)] / ([content (g) of component (2)]+[content (g) of component (3)]) is 0.2 to 1.0.

[13] The oily solid cosmetic according to any one of [1] to

[12] above, further comprising: component (4): one or more selected from the group consisting of 1,2-hexanediol, caprylyl glycol, ethylhexylglycerin, and phenoxyethanol.

[14] The oily solid cosmetic according to any one of [1] to

[13] above, wherein the oily solid cosmetic is a stick-type cosmetic.

[15] A hardness enhancer for enhancing the hardness of an oil-based solid cosmetic, comprising an oligoester obtained by esterification reaction of component (A) glycerin, component (B) a dicarboxylic acid having 2 to 12 carbon atoms, component (C) one or more fatty acids selected from the group consisting of caprylic acid, ethylhexanoic acid, isononanoic acid, isopalmitic acid, and isostearic acid, and component (D) one or more fatty acids selected from linear saturated fatty acids having 10 to 24 carbon atoms, The esterification reaction is an esterification reaction of 0.65 to 0.8 moles of the component (B) and 1.2 to 1.7 moles of the total amount of the component (C) and the component (D) relative to 1 mole of the component (A), and the mass ratio of the component (C) to the component (D) used in the esterification reaction is component (C):component (D)=10:90 to 99.9:0.1, and preferably component (C):component (D)= the ratio of components (C):component (D) is preferably 10:90 to 99:1, more preferably 25:75 to 99:1, even more preferably 40:60 to 99:1, still more preferably 40:60 to 70:30, most preferably 50:50 to 70:30, and it is also preferred that the ratio of components (C):component (D) is 10:90 to 70:30; the oligoester has an acid value of 5 mgKOH / g or less, preferably 0 to 3 mgKOH / g, and more preferably 0 to 2 mgKOH / g, a saponification value of 420 to 510 mgKOH / g, preferably 420 to 490 mgKOH / g, and more preferably 430 to 490 mgKOH / g, and a hydroxyl value of 60 mgKOH / g or less, preferably 0 to 60 mgKOH / g, more preferably 0 to 40 mgKOH / g, even more preferably 0 to 35 mgKOH / g, and still more preferably 0 to 20 mgKOH / g; and the oil-based solid cosmetic is an oil-based solid cosmetic containing one or more waxes selected from plant-based waxes that are solid at 25°C and animal-based waxes that are solid at 25°C.

[16] Use of an oligoester as a hardness enhancer for enhancing the hardness of an oil-based solid cosmetic, wherein the oligoester is obtained by an esterification reaction of glycerin as component (A), a dicarboxylic acid having 2 to 12 carbon atoms as component (B), one or more fatty acids selected from the group consisting of caprylic acid, ethylhexanoic acid, isononanoic acid, isopalmitic acid, and isostearic acid as component (C), and one or more fatty acids selected from linear saturated fatty acids having 10 to 24 carbon atoms as component (D), wherein the esterification reaction is carried out by esterifying 0.65 to 0.8 moles of component (B) and 1.2 to 1.7 moles of the total amount of component (C) and component (D) per mole of component (A), The mass ratio of the component (C) to the component (D) used in the esterification reaction is component (C):component (D)=10:90 to 99.9:0.1, preferably component (C):component (D)=10:90 to 99:1, more preferably component (C):component (D)=25:75 to 99:1, even more preferably component (C):component (D)=40:60 to 99:1, still more preferably component (C):component (D)=40:60 to 70:30, most preferably component (C):component (D)=50:50 to 70:30, and it is also preferable that component (C):component (D)=10:90 to 70:30. The oligoester has an acid value of 5 mgKOH / g or less, preferably 0 to 3 mgKOH / g, and more preferably 0 to 2 mgKOH / g, a saponification value of 420 to 510 mgKOH / g, preferably 420 to 490 mgKOH / g, and more preferably 430 to 490 mgKOH / g, and a hydroxyl value of 60 mgKOH / g or less, preferably 0 to 60 mgKOH / g, more preferably 0 to 40 mgKOH / g, even more preferably 0 to 35 mgKOH / g, and still more preferably 0 to 20 mgKOH / g; and the oily solid cosmetic is an oily solid cosmetic containing one or more waxes selected from plant-based waxes that are solid at 25°C and animal-based waxes that are solid at 25°C.

[0010] According to the present invention, it is possible to provide an oily solid cosmetic that contains a plant-based wax or an animal-based wax, has excellent shape retention, is effective in inhibiting oil stains during use, and has a good feel when used. Furthermore, according to the present invention, it is possible to provide a hardness enhancer that has an excellent hardness-enhancing effect on one or more waxes selected from plant-based waxes that are solid at 25° C. and animal-based waxes that are solid at 25° C.

[0011] In the present invention and the specification of this application, a numerical range of "A or more and B or less (A and B are real numbers satisfying A<B)" may be expressed as "A to B." For example, when it is written as "1 to 10 parts by mass," it means a numerical range from 1 part by mass to 10 parts by mass that includes the lower limit (1 part by mass) and the upper limit (10 parts by mass), that is, "1 part by mass or more and 10 parts by mass or less."

[0012] <Oil-based solid cosmetic> An overview of the oil-based solid cosmetic of this embodiment will be described. The oil-based solid cosmetic of this embodiment contains the following specific wax (component (1)) and specific oligoester (component (3)). Furthermore, the oil-based solid cosmetic of this embodiment preferably contains the following component (2) in addition to the following components (1) and (3). Component (1): One or more waxes selected from plant-based waxes that are solid at 25°C and animal-based waxes that are solid at 25°C. Component (2): An oil-based component that is liquid or pasty at 20°C (excluding component (3)). Component (3): An oligoester obtained by an esterification reaction of component (A): glycerin, component (B): a dicarboxylic acid having 2 to 12 carbon atoms, component (C): one or more fatty acids selected from the group consisting of caprylic acid, ethylhexanoic acid, isononanoic acid, isopalmitic acid, and isostearic acid, and component (D): one or more fatty acids selected from linear saturated fatty acids having 10 to 24 carbon atoms, and having an acid value of 5 mgKOH / g or less, a saponification value of 420 to 510 mgKOH / g, and a hydroxyl value of 60 mgKOH / g or less.

[0013] (Component (1)) The wax of component (1) contained in the oil-based solid cosmetic of this embodiment is one or more waxes selected from vegetable waxes that are solid at 25°C and animal waxes that are solid at 25°C. By incorporating vegetable waxes or animal waxes together with the specific oligoester of component (3), an oil-based solid cosmetic that is excellent in shape retention, oil stain prevention during use, and usability can be obtained. The wax of component (1) contained in the oil-based solid cosmetic of this embodiment may be one type, or two or more types. The "vegetable wax" and "animal wax" refer to waxes derived from plants or animals, respectively. It is preferable that the oil-based solid cosmetic of this embodiment does not contain hydrocarbon waxes such as ozokerite, ceresin, paraffin, petrolatum, microcrystalline wax, Fischer-Tropsch wax, polyethylene wax, ethylene-propylene copolymer, etc. However, vegetable waxes containing naturally occurring hydrocarbon components and animal waxes containing naturally occurring hydrocarbon components are not included in the hydrocarbon waxes and can be used as the wax of component (1). For example, an example of a vegetable wax containing naturally occurring hydrocarbon components is candelilla wax hydrocarbon.

[0014] The wax of component (1) is not particularly limited as long as it is a vegetable wax or animal wax that is solid at 25° C. and melts to a liquid at 120° C. Among vegetable waxes or animal waxes, the wax of component (1) is preferably a wax having a melting point in the range of 50° C. to 100° C., and more preferably a wax having a melting point in the range of 60° C. to 90° C. By having a melting point in the above range, an oily solid cosmetic product can be obtained that has better shape retention, a greater effect in inhibiting oil staining during use, and an extremely good feel when used.

[0015] The melting point of the wax used in the present invention and the present embodiment can be measured according to "71. Melting Point Determination Method, Method 2" of the Quasi-drug Ingredients Standards 2021. Specifically, the measurement is performed as follows. First, the sample (the wax whose melting point is to be measured) is melted at a low temperature and then drawn up to a height of approximately 10 mm into a capillary tube approximately 120 mm long with both ends open. The sample is then left at 10°C or below for 24 hours or ice-cooled for at least 2 hours. Next, the sample is attached to an immersion thermometer or a fully submerged thermometer so that the sample is positioned outside the center of the mercury bulb. The sample is then placed in a 250 mL beaker containing water, with the top end of the sample held 10 mm below the water surface. The water in the beaker is heated while constantly stirring. When the temperature reaches 5°C below the predicted melting point, heating is continued at a rate of 1°C per minute. The melting point is determined as the temperature at which the sample floats up in the capillary tube.

[0016] Examples of plant-based waxes having a melting point of 50°C to 100°C that can be used as the wax of component (1) include carnauba wax, rice bran wax, candelilla wax, candelilla wax hydrocarbon, sunflower seed wax, hydrogenated jojoba oil, and Japan wax. Examples of animal-based waxes having a melting point of 50°C to 100°C include beeswax and spermaceti, and one or more of these can be used. Of these, the wax of component (1) is preferably one, two or more, three or more, or four or more selected from carnauba wax, rice bran wax, candelilla wax, sunflower seed wax, and beeswax.

[0017] The content of component (1) in the oil-based solid cosmetic of this embodiment is not particularly limited and can be set appropriately taking into consideration the desired quality characteristics of the oil-based solid cosmetic. For example, the content (mass ratio) of component (1) relative to the entire oil-based solid cosmetic is preferably 5 to 30% by mass, more preferably 5 to less than 30% by mass, more preferably 10 to 30% by mass, more preferably 10 to less than 30% by mass, and even more preferably 14 to 20% by mass. By having the content of component (1) relative to the entire oil-based solid cosmetic within the above range, it becomes easy to obtain an oil-based solid cosmetic that has sufficient hardness and can be applied smoothly.

[0018] (Component (3)) The oligoester of component (3) contained in the oily solid cosmetic of this embodiment is an oligoester obtained by an esterification reaction between glycerin as component (A), a dicarboxylic acid having 2 to 12 carbon atoms as component (B), one or more fatty acids selected from the group consisting of caprylic acid, ethylhexanoic acid, isononanoic acid, isopalmitic acid, and isostearic acid as component (C), and one or more fatty acids selected from linear saturated fatty acids having 10 to 24 carbon atoms as component (D). The esterification reaction for obtaining the oligoester of component (3) is carried out by esterifying 0.65 to 0.8 moles of component (B) and 1.2 to 1.7 moles of the total amount of component (C) and component (D) with respect to 1 mole of component (A), and the mass ratio of component (C) to component (D) used in the esterification reaction is component (C):component (D)=10:90 to 99.9:0.1, and preferably, component (C) is 0.8 to 0.8 moles. ):Component (D)=10:90 to 99:1, more preferably, component (C):component (D)=25:75 to 99:1, even more preferably, component (C):component (D)=40:60 to 99:1, still more preferably, component (C):component (D)=40:60 to 70:30, most preferably, component (C):component (D)=50:50 to 70:30, and it is also preferred that component (C):component (D)=10:90 to 70:30. The oligoester of component (3) has an acid value of 5 mgKOH / g or less, preferably 0 to 3 mgKOH / g, and more preferably 0 to 2 mgKOH / g; a saponification value of 420 to 510 mgKOH / g, preferably 420 to 490 mgKOH / g, and more preferably 430 to 490 mgKOH / g; and a hydroxyl value of 60 mgKOH / g or less, preferably 0 to 60 mgKOH / g, more preferably 0 to 40 mgKOH / g, even more preferably 0 to 35 mgKOH / g, and even more preferably 0 to 20 mgKOH / g.

[0019] The oligoester of component (3) has the effect of increasing the hardness of the oil-based solid cosmetic (the effect of increasing the hardness of the oil-based solid cosmetic). Therefore, the oil-based solid cosmetic of the present embodiment containing this oligoester has a sufficiently higher hardness and can improve shape retention compared to an oil-based solid cosmetic that does not contain this oligoester.

[0020] The oligoester of component (3) is liquid at 20° C. Furthermore, the oligoester of component (3) has good low-temperature stability, and crystal precipitation is suppressed even at low temperatures. Therefore, the oil-based solid cosmetic preparation of the present embodiment containing this oligoester is suppressed from crystal precipitation even at low temperatures, and is maintained stably.

[0021] The oligoester of component (3) has excellent pigment dispersibility, and therefore, by adding the oligoester of component (3) to an oil-based solid cosmetic preparation containing a pigment, the dispersibility of the pigment is improved, and the pigment can be dispersed uniformly throughout the oil-based solid cosmetic preparation.

[0022] The oligoester of component (3) contained in the oily solid cosmetic of this embodiment may be one type or two or more types.

[0023] Component (B), which is used as a raw material for the oligoester of component (3), is a dicarboxylic acid having 2 to 12 carbon atoms. Examples of dicarboxylic acids having 2 to 12 carbon atoms include oxalic acid (ethanedioic acid), malonic acid (propanedioic acid), succinic acid (butanedioic acid), glutaric acid (pentanedioic acid), adipic acid (xanedioic acid), pimelic acid (heptanedioic acid), veric acid (octanedioic acid), azelaic acid (nonanedioic acid), sebacic acid (decanedioic acid), phthalic acid (benzene-1,2-dicarboxylic acid), isophthalic acid (benzene-1,3-carboxylic acid), and terephthalic acid (benzene-1,4-dicarboxylic acid). Succinic acid is particularly preferred as component (B), which is used as a raw material for the oligoester of component (3), from the viewpoint of further improving hardness.

[0024] Component (C), which is used as a raw material for the oligoester of component (3), is one or more fatty acids selected from the group consisting of caprylic acid, ethylhexanoic acid, isononanoic acid, isopalmitic acid, and isostearic acid. Caprylic acid is particularly preferred as component (C), which is used as a raw material for the oligoester of component (3). Furthermore, the oligoester of component (3) has better color and odor than oligoesters obtained by esterification of unsaturated fatty acids with components (A) and (B).

[0025] Component (D), which is used as a raw material for the oligoester of component (3), is one or more fatty acids selected from linear saturated fatty acids having 10 to 24 carbon atoms. Specific examples of such fatty acids include capric acid (n-decanoic acid), lauric acid, myristic acid, palmitic acid, stearic acid, and behenic acid. Capric acid is particularly preferred as component (D), which is used as a raw material for the oligoester of component (3).

[0026] The acid value of the oligoester of component (3) is 5 mgKOH / g or less (0 to 5 mgKOH / g). If the acid value is higher than 5 mgKOH / g, there is a risk of odor generation. Since the oligoester of component (3) has an acid value of 5 mgKOH / g or less, it does not have a distinctive odor. Therefore, the oil-based solid cosmetic of this embodiment can be provided with excellent shape retention due to the oligoester of component (3) without compromising the desired fragrance quality. The acid value of the oligoester of component (3) can be adjusted to within the above range by sampling the reaction product during the esterification reaction, measuring its acid value, and terminating the esterification reaction when the desired acid value is reached. The acid value of the oligoester of component (3) is 5 mgKOH / g or less, preferably 0 to 3 mgKOH / g, and more preferably 0 to 2 mgKOH / g.

[0027] The saponification value of the oligoester of component (3) is 420 to 510 mgKOH / g, preferably 420 to 490 mgKOH / g, and more preferably 430 to 490 mgKOH / g. When the saponification value is within this range, the oligoester exhibits a hardness-improving effect. The saponification value of the oligoester of component (3) can be adjusted by the amount charged in the esterification reaction.

[0028] The hydroxyl value of the oligoester of component (3) is 60 mgKOH / g or less, preferably 0 to 60 mgKOH / g, more preferably 0 to 40 mgKOH / g, even more preferably 0 to 35 mgKOH / g, and even more preferably 0 to 20 mgKOH / g. If the hydroxyl value is too high, wax solubility may be poor. By having a hydroxyl value of 60 mgKOH / g or less, the oligoester of component (3) has good wax solubility. The hydroxyl value of the oligoester of component (3) can be adjusted by the amount charged in the esterification reaction.

[0029] Commercially available products can be used for each of these components (A) to (D). Plant-derived glycerin and linear saturated fatty acids are commonly available, and succinic acid is also mass-produced industrially by fermentation. Therefore, by using succinic acid as component (B), the oligoester of component (3) can be produced using a combination of inexpensive raw materials. In particular, from the viewpoints of environmental impact and sustainability of supply, it is preferable to use glycerin as component (A), succinic acid as component (B), caprylic acid, a linear saturated fatty acid, as component (C), and capric acid as component (D) as raw materials for the oligoester of component (3).

[0030] The degree of crosslinking and the number of side chains of the oligoester of component (3) can be adjusted by changing the amounts of raw materials charged in the esterification reaction, thereby obtaining an oligoester with various effects. Specifically, the degree of crosslinking of the obtained oligoester of component (3) can be adjusted by changing the amounts of components (A) and (B) charged. Furthermore, the degree of crosslinking and the number of added side chains can be adjusted by changing the amount of fatty acid charged as component (C).

[0031] In the esterification reaction to produce the oligoester of component (3), 0.65 to 0.8 moles of component (B) and 1.2 to 1.7 moles of the total of components (C) and (D) are esterified relative to 1 mole of component (A). The mass ratio of component (C) to component (D) is 10:90 to 99.9:0.1, preferably 10:90 to 99:1, more preferably 25:75 to 99:1, even more preferably 40:60 to 99:1, still more preferably 40:60 to 70:30, and most preferably 50:50 to 70:30. It is also preferred that the mass ratio be 10:90 to 70:30.

[0032] If the amount of component (B) charged per mole of component (A) is less than 0.65 moles, the resulting oligoester may not have the effect of improving the hardness of the oil-based solid cosmetic preparation. On the other hand, if more than 0.8 moles of component (B) are used, crosslinking between component (A) and component (B) may proceed too far, causing the resulting oligoester to become cloudy.

[0033] If the amount of component (C) charged per mole of component (A) exceeds 1.7 moles, transesterification may occur, and synthesis may not proceed to the desired degree of crosslinking. On the other hand, if the amount of component (C) charged is less than 1.2 moles, the amount of unreacted hydroxyl groups may increase, and the wax solubility of the resulting oligoester may be poor.

[0034] The mass ratio of the components (C) and (D) charged is 10:90 to 99.9:0.1, preferably 10:90 to 99:1, more preferably 25:75 to 99:1, even more preferably 40:60 to 99:1, even more preferably 40:60 to 70:30, and most preferably 50:50 to 70:30. It is also preferred that the mass ratio of component (C): component (D) is 10:90 to 70:30. In the mass ratio of the components (C) and (D), the mass ratio of component (D) ([mass of component (D)] / ([mass of component (C)]+[mass of component (D)])) may be less than 0.1. On the other hand, when the mass ratio of component (C) ([mass of component (C)] / ([mass of component (C)]+[mass of component (D)])) in the charged mass ratio of component (C) to component (D) is 8 or less (component (C):component (D)=8:92), the obtained oligoester is prone to crystallization in a low-temperature environment and has poor low-temperature stability, which is not preferred.

[0035] The oligoester of component (3) can be produced, for example, by charging 0.65 to 0.8 moles of component (B) and 1.2 to 1.7 moles of the total of components (C) and (D) per mole of component (A), and reacting them at a temperature of 180 to 240°C in the presence or absence of a catalyst. The catalyst can be an acid, alkali, or other catalyst known per se in the field of organic chemistry, which is used in the esterification reaction of alcohols and fatty acids. The esterification reaction can be carried out in a solvent that does not adversely affect the esterification of alcohols and fatty acids, or it can be carried out without a solvent. The solvent can be a solvent known per se in the field of organic chemistry, which is used in the esterification reaction of alcohols and fatty acids.

[0036] The reaction time for the esterification reaction to produce the oligoester of component (3) can usually be 20 to 30 hours. The reaction time may be 20 hours or less or 30 hours or more, depending on the raw material used (linear or branched), the presence or absence of a catalyst, the esterification temperature, the amount of excess acid, and other factors. After completion of the reaction, if a catalyst was used, it may be removed by filtration, adsorption, or the like.

[0037] By subjecting components (A) to (D) to an esterification reaction, a reaction product containing an oligoester of component (3) can be obtained. Purification of the reaction product by conventional purification methods can yield a purified oligoester. For example, the reaction product of the esterification reaction can be purified by removing excess unreacted raw materials by distillation. Furthermore, if it is desired to improve the color, etc., of the esterified product, the color can be improved by conventional decolorization treatment.

[0038] The content of component (3) in the oil-based solid cosmetic of this embodiment is not particularly limited, as long as it is an amount that exhibits the hardness-improving effect of the oligoester of component (3). For example, the content of component (3) relative to the entire oil-based solid cosmetic is preferably 10 to 90% by mass, more preferably 20 to 90% by mass, and even more preferably 20 to 60% by mass.

[0039] (Component (2)) In addition to components (1) and (3), the oil-based solid cosmetic of this embodiment can also contain, as component (2), an oily component that is liquid or pasty at 20°C. When component (2) is contained, the oily component of component (2) is not particularly limited as long as it is an oily substance other than component (3), and can be appropriately selected from various oily components that are liquid or pasty at 20°C and are commonly blended in cosmetics. The oily component of component (2) contained in the oil-based solid cosmetic of this embodiment may be one type, or two or more types.

[0040] Examples of the oily component (2) that is liquid or pasty at 20°C include hydrocarbons, fatty acid esters, triglycerides, fatty acids, higher alcohols, silicone oils, fluorine-based oils, and derivatives thereof, and one or more of these can be used.Specifically, castor oil, olive oil, avocado oil, palm oil, cocoa oil, liquid paraffin, liquid branched paraffin, petrolatum, squalane, hydrogenated polyisobutene, hydrogenated polydecene, di(caprylic / capric) propanediol, neopentyl glycol dicaprate, polyglyceryl-6 octacaprylate, tri(caprylic / capric) glyceryl, triethylhexanoin, butyl stearate, ethylhexyl palmitate, coco-alkyl (caprylic / capric) acid, caprylyl (caprylic / capric) acid, myristyl Octyldodecyl Phosphate, Isopropyl Myristate, Isopropyl Lanolinate, Hexyl Lanolinate, Diisopropyl Adipate, Diisopropyl Sebacate, Isotridecyl Isononanoate, Isononyl Isononanoate, Polyglyceryl Decaisostearate, 2-Octyldodecanol, Diisostearyl Malate, Polyglyceryl-2 Triisostearate, Polyglyceryl-2 Diisostearate, Dipentaerythrityl Pentaisostearate, Dipentaerythrityl Tetraisostearate, Tetraisostearin Pentaerythrityl Triisostearate, Trimethylolpropane Triisostearate, Dipentaerythrityl Hexahydroxystearate / Hexastearate / Hexarosinate, Cholesteryl Hydroxystearate, Phytosteryl Macadamia Seed Oil Fatty Acids, Bis(Behenyl / Isostearyl / Phytosteryl) Dimer Dilinoleyl Dimer Dilinoleate, Phytosteryl / Octyldodecyl / Behenyl Lauroyl Glutamate, Glyceryl Ethylhexanoate / Stearate / Adipic Acid, Oleyl Alcohol, Dimethylpolysiloxane Examples of suitable cleansers include methyl phenyl polysiloxane, dimethyl cyclopolysiloxane, methyl hydrogen polysiloxane, perfluoropolyether, di(phytosteryl / octyldodecyl) lauroyl glutamate, dipentaerythrityl hexahydroxystearate, dipentaerythrityl tetra(hydroxystearate / isostearate), dipentaerythrityl tri-polyhydroxystearate, mineral oil, cetyl ethylhexanoate, phenyl trimethicone, cyclopentasiloxane, and isododecane.

[0041] The oily component (2) contained in the oil-based solid cosmetic of this embodiment is one or more selected from the group consisting of castor oil, diisostearyl malate, polyglyceryl-2 triisostearate, polyglyceryl-10 decaisostearate, tri(caprylic / capric)glyceryl, macadamia seed oil, glyceryl (ethylhexanoate / stearate / adipic) and di(caprylic / capric)propanediol. is preferred, and one or more selected from polyglyceryl-2 triisostearate, polyglyceryl-10 decaisostearate, glyceryl tri(caprylic / capric acid), and macadamia seed oil is more preferred, and one or more selected from polyglyceryl-2 triisostearate, polyglyceryl-10 decaisostearate, glyceryl tri(caprylic / capric acid), and macadamia seed oil is even more preferred.

[0042] The content of component (2) in the oil-based solid cosmetic of this embodiment is not particularly limited, as long as it is an amount that allows the hardness-improving effect of the oligoester of component (3) to be exhibited, and can be set appropriately in consideration of the desired quality characteristics of the oil-based solid cosmetic. When the oil-based solid cosmetic of this embodiment contains component (2), for example, the content of component (2) relative to the entire oil-based solid cosmetic is preferably more than 0% by mass and not more than 60% by mass, more preferably more than 0% by mass and not more than 50% by mass, and even more preferably more than 0% by mass and not more than 40% by mass.

[0043] (Component (4)) The oily solid cosmetic of this embodiment may contain the following component (4) in addition to component (1) and component (3), or in addition to component (1), component (2), and component (3), or in addition to component (1), component (2), component (3), and an ultraviolet absorber described below. These alcohols are alcohols that are generally added to cosmetics as preservatives. Component (4): One or more selected from the group consisting of 1,2-hexanediol, caprylyl glycol, ethylhexylglycerin, and phenoxyethanol.

[0044] The content of component (4) in the oil-based solid cosmetic of this embodiment is not particularly limited, as long as it is an amount that allows the hardness-improving effect of the oligoester of component (3) to be exhibited, and can be set appropriately in consideration of the desired quality characteristics of the oil-based solid cosmetic. For example, the content of component (4) relative to the entire oil-based solid cosmetic is preferably more than 0% by mass and not more than 5.0% by mass, more preferably more than 0% by mass and not more than 2.0% by mass, and even more preferably more than 0% by mass and not more than 1.0% by mass.

[0045] In the oil-based solid cosmetic of this embodiment, the content of component (1) relative to the entire oil-based solid cosmetic is 5 to 30% by mass, preferably 10 to 30% by mass, and more preferably 14 to 20% by mass; the content of component (2) relative to the entire oil-based solid cosmetic is 0 to 60% by mass, preferably 0 to 50% by mass, and more preferably 0 to 40% by mass; and the content of component (3) relative to the entire oil-based solid cosmetic is 10 to 90% by mass, preferably 20 to 90% by mass, and more preferably 20 to 60% by mass; An oil-based solid cosmetic is preferred in which the mass ratio of component (3) to the total amount of component (2) and component (3) ([content (mass) of component (3)] / ([content (mass) of component (2)]+[content (mass) of component (3)]) is 0.2 to 1.0; and the content of component (4) relative to the entire oil-based solid cosmetic is 0 to 5.0 mass%, preferably 0 to 2.0 mass%, more preferably 0 to 1.0 mass%. Note that "a content of component (X) of 0 mass%" means that component (X) is not contained.

[0046] (Ultraviolet Absorber) The oily solid cosmetic preparation of the present embodiment preferably contains an ultraviolet absorber in addition to component (1) and component (3), or in addition to component (1), component (2), and component (3), or in addition to component (1), component (2), component (3), and component (4).

[0047] The ultraviolet absorber contained in the oil-based solid cosmetic preparation of the present embodiment is not limited to the following, but examples thereof include benzoic acid-based ultraviolet absorbers such as para-aminobenzoic acid (hereinafter abbreviated as PABA), PABA monoglycerin ester, N,N-dipropoxy PABA ethyl ester, N,N-diethoxy PABA ethyl ester, N,N-dimethyl PABA ethyl ester, N,N-dimethyl PABA butyl ester, and N,N-dimethyl PABA ethyl ester; anthranilic acid-based ultraviolet absorbers such as homomenthyl-N-acetylanthranilate; amyl salicylate; salicylic acid-based ultraviolet absorbers such as salicylate, menthyl salicylate, homomenthyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, and p-isopropanol phenyl salicylate; octyl cinnamate, ethyl-4-isopropyl cinnamate, methyl-2,5-diisopropyl cinnamate, ethyl-2,4-diisopropyl cinnamate, methyl-2,4-diisopropyl cinnamate, propyl-p-methoxycinnamate, isopropyl-p-methoxycinnamate, isoamyl-p-methoxycinnamate, cinnamic acid-based ultraviolet absorbers such as 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxy ... benzophenone-based ultraviolet absorbers such as 2-hydroxy-4,4'-dimethoxybenzophenone, 2,2',4,4'-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-4'-methylbenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonate, 4-phenylbenzophenone, 2-ethylhexyl-4'-phenyl-benzophenone-2-carboxylate, 2-hydroxy-4-n-octoxybenzophenone, and 4-hydroxy-3-carboxybenzophenone;3-(4'-methylbenzylidene)-d,l-camphor, 3-benzylidene-d,l-camphor, urocanic acid, urocanic acid ethyl ester, 2-phenyl-5-methylbenzoxazole, 2,2'-hydroxy-5-methylphenylbenzotriazole, 2-(2'-hydroxy-5'-t-octylphenyl)benzotriazole, 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, dibenzalazine, dianisoylmethane, 4-methoxy-4'-t-butyldibenzoylmethane, 5-(3 ,3-dimethyl-2-norbornylidene)-3-pentan-2-one, and 2,4,6-trianilino-p-(carbo-2'-ethylhexyl-1'-oxy)1,3,5-triazine, 4-tent-butyl-4'-methoxydibenzoylmethane, ethylaminohydroxybenzoylhexyl benzoate, ethylhexyl triazine, t-butylmethoxydibenzoylmethane, bisethylhexyloxyphenol methoxyphenyl triazine, diethylhexylbutamido triazone, oxybenzone-3, etc. The ultraviolet absorber may be used alone or in combination of two or more.

[0048] The content of the ultraviolet absorber in the oil-based solid cosmetic of this embodiment is not particularly limited as long as it is an amount that allows the hardness-improving effect of the oligoester of component (3) to be exhibited, and can be appropriately set in consideration of the desired quality characteristics of the oil-based solid cosmetic. For example, the content of the ultraviolet absorber relative to the entire oil-based solid cosmetic is preferably more than 0% by mass and not more than 5.0% by mass, more preferably more than 0% by mass and not more than 2.0% by mass, and even more preferably more than 0% by mass and not more than 1.0% by mass.

[0049] (Powder) The oil-based solid cosmetic of the present embodiment may contain a powder in addition to component (1) and component (3), or in addition to component (1), component (2), and component (3), or in addition to component (1), component (2), component (3), and component (4). The oligoester of component (3) has good pigment dispersibility, so by blending a powder into the oil-based solid cosmetic of the present embodiment, an oil-based solid cosmetic in which the powder is uniformly dispersed throughout the cosmetic can be obtained.

[0050] As the powder, extender pigments, color pigments, and pearl pigments can be used.

[0051] Examples of extender pigments include inorganic pigments such as silicic acid, silicic anhydride, magnesium silicate, talc, sericite, mica, kaolin, clay, bentonite, bismuth oxychloride, zirconium oxide, magnesium oxide, zinc oxide, aluminum oxide, calcium sulfate, barium sulfate, magnesium sulfate, calcium carbonate, and magnesium carbonate, and composite powders thereof; organic powders such as polyamide, polyester, polypropylene, polystyrene, polyurethane, nylon, silicone resin, vinyl resin, urea resin, phenolic resin, silicon resin, acrylic resin, melamine resin, epoxy resin, polycarbonate resin, divinylbenzene-styrene copolymer, silk powder, cellulose, Nε-lauroyl-L-lysine, long-chain alkyl phosphate metal salt, N-mono long-chain alkyl acyl basic amino acid, and metal soap, and composite powders thereof; and composite powders of the above inorganic and organic powders. The particle shape of these powders may be any shape, such as spherical, plate-like, acicular, granular, or irregular.

[0052] Examples of coloring pigments include metal oxides such as titanium oxide, zinc oxide, yellow iron oxide, red iron oxide, black iron oxide, Prussian blue, ultramarine, chromium oxide, and chromium hydroxide; metal complexes such as manganese violet and cobalt titanate; inorganic pigments such as carbon black; organic pigments such as tar-based dyes and lake pigments; and natural pigments such as carmine.

[0053] As the pearl pigment, there can be used pearl pigments in which mica, synthetic phlogopite, etc. are coated with a colorant such as titanium oxide, iron oxide, silicon oxide, Prussian blue, chromium oxide, carmine, organic pigments, etc. These powders may be subjected to various surface treatments such as water repellency treatment and water / oil repellency treatment by a conventional method before use.

[0054] By incorporating a powder having an ultraviolet ray shielding effect, such as a metal oxide powder, it is also possible to produce a sunscreen cosmetic (a cosmetic for preventing sunburn). The metal oxide powder having an ultraviolet ray shielding effect is not particularly limited, and examples thereof include titanium oxide, zinc oxide, zirconium oxide, and cerium oxide, and one or more of these can be used.

[0055] The shape of the metal oxide powder having the UV-shielding effect is not particularly limited, and examples thereof include spherical, needle-like, spindle-like, plate-like, and flaky shapes. The powder may be treated with an inorganic compound such as silica or alumina to reduce its surface activity. Furthermore, it is more preferable for the metal oxide powder to have an average particle size of 10 to 100 nm, since this prevents the powder from appearing white when applied to the skin.

[0056] The oil-based solid cosmetic of this embodiment may contain one type of powder, or two or more types. The content of the powder in the oil-based solid cosmetic of this embodiment is not particularly limited, as long as it is an amount that allows the hardness-improving effect of the oligoester of component (3) to be exerted, and can be set appropriately taking into consideration the desired quality characteristics of the oil-based solid cosmetic. For example, the content of the powder relative to the entire oil-based solid cosmetic (total mass) is preferably 0 to 50% by mass, more preferably 0 to 40% by mass, and even more preferably 0 to 30% by mass.

[0057] (Other Additives) The oil-based solid cosmetic of this embodiment may contain additives other than components (1) to (4), UV absorbers, and powders, as long as the effect of the oligoester of component (3) is not impaired. One or more of these additives may be appropriately selected from known additives used in cosmetics, hygiene products, pharmaceuticals, etc. Specific examples of such additives include gelling agents (excluding component (1)), surfactants, antioxidants, antioxidant aids, preservatives, alcohols (excluding component (4)), water-soluble polymers, pH adjusters, inorganic salts or organic acid salts, chelating agents, vitamins, organic solvents, fragrances, various extracts, and UV scattering agents.

[0058] The gelling agent contained in the oily solid cosmetic preparation of this embodiment may be behenyl behenate, glyceryl tribehenate, dextrin ethylhexanoate, dextrin palmitate, dextrin myristate, dextrin isostearate, inulin palmitate, inulin stearate, higher fatty acids, metal soaps of higher fatty acids, silica silylate, dibutyl ethylhexanoyl glutamide, dibutyl lauroyl glutamide, etc., and may be used alone or in combination of two or more.

[0059] The surfactant contained in the oily solid cosmetic preparation of this embodiment may be a nonionic surfactant, anionic surfactant, cationic surfactant, amphoteric surfactant, or the like, which may be used alone or in combination of two or more.

[0060] Examples of nonionic surfactants include monoglycerides, sorbitan fatty acid esters, sucrose fatty acid esters, polyglycerin fatty acid esters, alkanolamides, amine oxides, polyoxyethylene alkyl ethers, polyethylene glycol fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene propylene glycol mono-fatty acid esters, polyoxyethylene hydrogenated castor oil, polyoxyethylene fatty acid amides, polyoxyethylene alkylamines, alkylsaccharides, α-monoalkylglyceryl ethers, dimethylpolysiloxane-polyoxyalkylene copolymers, dimethylpolysiloxane-monoalkylglyceryl ether copolymers, and sorbitan sesquiisostearate.

[0061] Examples of anionic surfactants include alkylbenzene sulfonates, alkylnaphthalene sulfonates, polyoxyethylene alkyl ether sulfates, and polyoxyethylene lauryl ether phosphates.

[0062] Examples of cationic surfactants include primary, secondary and tertiary amine salts and quaternary ammonium salts having an aliphatic hydrocarbon group.

[0063] Examples of amphoteric surfactants include sodium β-laurylaminopropionate, lauryldimethylaminoacetic acid betaine, and 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine.

[0064] Other surfactants that can be used include lecithins, soybean saponin, etc. Examples of lecithins include lecithin, hydrogenated lecithin, hydroxide lecithin, lysolecithin, hydrogenated lysolecithin, etc. Examples of hydrogenated lecithins include hydrogenated soybean phospholipid, hydrogenated rapeseed phospholipid, and hydrogenated egg yolk phospholipid.

[0065] Among the surfactants contained in the oily solid cosmetic preparation of the present embodiment, nonionic surfactants such as polyoxyethylene-modified silicone, polyglycerin fatty acid ester, polyoxyethylene alkyl, polyoxyethylene fatty acid ester, and polyoxyethylene hydrogenated castor oil are preferred.

[0066] The antioxidant contained in the oily solid cosmetic preparation of the present embodiment is not particularly limited, and examples thereof include oil-soluble vitamin C derivatives, tocopherols and their derivatives and salts, dibutylhydroxytoluene, butylhydroxyanisole, and gallic acid esters, etc. One type of antioxidant may be used alone, or two or more types may be used in combination.

[0067] The antioxidant aid contained in the oily solid cosmetic preparation of the present embodiment is not particularly limited, and examples thereof include phosphoric acid, citric acid, maleic acid, malonic acid, succinic acid, fumaric acid, cephalin, hexametaphosphate, phytic acid, ethylenediaminetetraacetic acid, etc. One type of antioxidant aid may be used alone, or two or more types may be used in combination.

[0068] The preservative contained in the oily solid cosmetic preparation of the present embodiment is not particularly limited, and examples thereof include methylparaben, ethylparaben, butylparaben, etc. One type of preservative may be used alone, or two or more types may be used in combination.

[0069] The alcohol contained in the oily solid cosmetic preparation of the present embodiment is not particularly limited, and may be a monohydric alcohol or a polyhydric alcohol.

[0070] The monohydric alcohol may be a lower alcohol or a higher alcohol. Examples of lower alcohols include methanol, ethanol, propanol, isopropanol, isobutyl alcohol, and t-butyl alcohol. Examples of higher alcohols include cetanol (cetyl alcohol, palmityl alcohol), stearyl alcohol (octadecyl alcohol), isostearyl alcohol (isooctadecanol), oleyl alcohol, cetostearyl alcohol, octyldodecanol, decyltetradecanol, hexyldecanol, behenyl alcohol, lauryl alcohol, lanolin alcohol, and hydrogenated lanolin alcohol. One type of monohydric alcohol may be used alone, or two or more types may be used in combination.

[0071] Examples of polyhydric alcohols include propylene glycol (1,2-propanediol), 1,3-propanediol, 1,3-butylene glycol (1,3-butanediol), pentylene glycol (1,2-pentanediol), neopentylene glycol (2,2-dimethyl-1,3-propanediol), isoprene glycol (3-methyl-1,3-butanediol), dipropylene glycol, glycerin, diglycerin, polyglycerin, polyethylene glycol, pentaerythritol, dipentaerythritol, sorbitol, sorbitan, etc. One type of polyhydric alcohol may be used alone, or two or more types may be used in combination.

[0072] The water-soluble thickener may be a natural water-soluble polymer, a semi-synthetic water-soluble polymer, or a synthetic water-soluble polymer. The water-soluble thickener contained in the oil-based solid cosmetic preparation of the present embodiment may be used alone or in combination of two or more types.

[0073] Examples of natural water-soluble polymers include plant-based polymers such as agar, glucomannan, gum arabic, tragacanth gum, galactan, guar gum, carob gum, karaya gum, carrageenan, pectin, quince seed (quince), algae colloid (cassow extract), and starch (rice, corn, potato, wheat); microbial-based polymers such as xanthan gum, dextran, succinoglucan, and pullulan; and animal-based polymers such as collagen, casein, albumin, and gelatin.

[0074] Examples of semi-synthetic water-soluble polymers include starch-based polymers such as carboxymethyl starch and methylhydroxypropyl starch; cellulose-based polymers such as methyl cellulose, nitrocellulose, methylhydroxypropyl cellulose, sodium cellulose sulfate, hydroxypropyl cellulose, carboxymethyl cellulose, sodium carboxymethyl cellulose, crystalline cellulose and cellulose powder; and alginic acid-based polymers such as sodium alginate and propylene glycol alginate.

[0075] Examples of synthetic water-soluble polymers include vinyl polymers such as polyvinyl alcohol, polyvinyl methyl ether, polyvinylpyrrolidone, and carboxyvinyl polymers; polyoxyethylene polymers such as polyethylene glycol 20,000, 40,000, and 60,000; polyoxyethylene-polyoxypropylene copolymer polymers; acrylic polymers such as sodium polyacrylate, polyethyl acrylate, and polyacrylamide; polyethyleneimine; and cationic polymers.

[0076] Examples of pH adjusters include edetic acid, edetate disodium, citric acid, sodium citrate, sodium hydroxide, potassium hydroxide, triethanolamine, etc. The pH adjusters may be used alone or in combination of two or more.

[0077] Examples of inorganic salts include sodium chloride, potassium chloride, magnesium chloride, sodium sulfate, potassium sulfate, magnesium sulfate, etc. Examples of organic acid salts include citric acid, malic acid, tartaric acid, and salts thereof, ascorbic acid and salts thereof, and ascorbic acid derivatives and salts thereof.

[0078] Examples of the chelating agent include disodium edetate, edetate salts, hydroxyethanediphosphonic acid, etc. The chelating agents may be used alone or in combination of two or more.

[0079] Examples of vitamins include vitamin A, vitamin B1, vitamin B2, vitamin B6, vitamin E, vitamin K and derivatives thereof, pantothenic acid and derivatives thereof, and biotin.

[0080] Examples of extracts include plant extracts such as aloe vera, witch hazel, hamamelis, cucumber, lemon, lavender, and rose.

[0081] (Method for Producing Oil-Based Solid Cosmetics) The oil-based solid cosmetic of this embodiment can be produced, for example, by heat-mixing the oligoester of component (3), the wax of component (1), and other ingredients until uniform, and then filling the resulting liquid or paste-like mixture into a container for forming the desired shape and cooling it. The raw material components may be mixed all at once or sequentially. The oil-based solid cosmetic of this embodiment containing component (2) can be produced, for example, by heat-mixing the oligoester of component (3), the wax of component (1), the oily component of component (2), and other ingredients until uniform, and then filling the resulting liquid or paste-like mixture into a container for forming the desired shape and cooling it. The raw material components may be mixed all at once or sequentially.

[0082] The shape of the oily solid cosmetic preparation of the present embodiment is not particularly limited, and it can be molded into various shapes, such as a rod shape, a plate shape, or a shape formed by pouring into a dish-like object.

[0083] The oil-based solid cosmetic of the present embodiment is not particularly limited, and examples thereof include makeup cosmetics such as lipstick, foundation, concealer, blush, eyebrow makeup, eyeshadow, and eyeliner; body care cosmetics such as UV care products, deodorant products, body skin care products, body fragrance products, and body cleansing products; cleansing products such as cleansing balms, whitening cosmetics, UV care cosmetics, anti-aging products, and skin care cosmetics such as skin care balms; hair care cosmetics such as hair styling wax, hair tics, hair treatment agents, one-day hair color agents, and hair gloss; fragrance cosmetics such as perfumes, eau de toilette, eau de cologne, eau de parfum, and stick-type solid perfumes; topical skin preparations such as ointments and sunscreens. In addition to lipstick, lip cosmetics can also be used as primer cosmetics and finishing gloss cosmetics known as lip balms, lip glosses, lip colors, and the like. The oily solid cosmetic of this embodiment is particularly preferably a stick-type cosmetic such as lipstick or lip gloss, because it has excellent shape retention.

[0084] <Hardness Improver> The oligoester of component (3) can improve the hardness of oil-based solid cosmetics containing one or more waxes selected from the above-mentioned plant-based waxes that are solid at 25°C and animal-based waxes that are solid at 25°C. Therefore, the oligoester of component (3) can be used as a hardness improver for oil-based solid cosmetics. Even when an oil-based solid cosmetic contains the above-mentioned oily component that is liquid or pasty at 20°C, the hardness can be improved by incorporating the oligoester of component (3). Therefore, the oligoester of component (3) can be used as a hardness improver for oil-based solid cosmetics containing one or more waxes selected from the above-mentioned plant-based waxes that are solid at 25°C and animal-based waxes that are solid at 25°C, and the above-mentioned oily component that is liquid or pasty at 20°C.

[0085] That is, the hardness enhancer of this embodiment is a hardness enhancer that enhances the hardness of an oil-based solid cosmetic, and comprises an oligoester obtained by an esterification reaction of glycerin as component (A), a dicarboxylic acid having 2 to 12 carbon atoms as component (B), one or more fatty acids selected from the group consisting of caprylic acid, ethylhexanoic acid, isononanoic acid, isopalmitic acid, and isostearic acid as component (C), and one or more fatty acids selected from linear saturated fatty acids having 10 to 24 carbon atoms as component (D). The esterification reaction is carried out by esterifying 0.65 to 0.8 moles of the component (B) with 1 mole of the component (A) and 1.2 to 1.7 moles of the total amount of the component (C) and the component (D), and the mass ratio of the component (C) to the component (D) used in the esterification reaction is component (C):component (D)=10:90 to 99.9:0.1, preferably component (C):component (D)=10:90 to 99.9:0.1. The ratio of components (C):(D) is preferably 0:90 to 99:1, more preferably 25:75 to 99:1, even more preferably 40:60 to 99:1, even more preferably 40:60 to 70:30, and most preferably 50:50 to 70:30, and also preferably 10:90 to 70:30. The oligoester has an acid value of 5 mgKOH / g or less, a saponification value of 420 to 510 mgKOH / g, and a hydroxyl value of 60 mgKOH / g or less. The hardness enhancer of this embodiment enhances the hardness of an oil-based solid cosmetic containing one or more waxes selected from plant-based waxes that are solid at 25°C and animal-based waxes that are solid at 25°C.

[0086] Components (A) to (D) and the reaction conditions for the esterification reaction thereof are the same as those for the oligoester of component (3).

[0087] By mixing the hardness enhancer of this embodiment into an oil-based solid cosmetic containing one or more waxes selected from plant-based waxes that are solid at 25° C. and animal-based waxes that are solid at 25° C., the hardness of the resulting oil-based solid cosmetic can be made higher than the hardness of an oil-based solid cosmetic obtained by mixing castor oil into an oil-based solid cosmetic of the same composition. The plant-based waxes that are solid at 25° C. and the animal-based waxes that are solid at 25° C. can be the same as those listed for component (1) above. Furthermore, by mixing the hardness enhancer of this embodiment into an oil-based solid cosmetic containing one or more waxes selected from plant-based waxes that are solid at 25° C. and animal-based waxes that are solid at 25° C., and an oily component that is liquid or pasty at 20° C., the hardness of the resulting oil-based solid cosmetic can be made higher than the hardness of an oil-based solid cosmetic obtained by mixing castor oil into an oil-based solid cosmetic of the same composition. The plant-based wax that is solid at 25°C and the animal-based wax that is solid at 25°C can be the same as those listed in component (1) above, and the oil-based component that is liquid or pasty at 20°C can be the same as those listed in component (2) above.

[0088] The present invention will be described in more detail below with reference to examples. It goes without saying that the scope of the present invention is not limited to these examples. In the following examples, parts and % represent parts by mass or % by mass unless otherwise specified.

[0089] In the following experiments, the acid value, saponification value, and hydroxyl value of the esterification reaction products were measured in accordance with the Standards for Quasi-drug Ingredients 2006.

[0090] In the following experiments, the waxes (vegetable waxes that are solid at 25°C or animal waxes that are solid at 25°C) as component (1) and the oily components (oily components that are liquid or pasty at 20°C) as component (2) that are relatively frequently used are shown in Table 1. For components (1) and (2) that are not listed in Table 1, the trade names, manufacturers, or distributors are listed in each example.

[0091]

[0092] Synthesis Example 1 Production of Oligoester A 1-L four-neck flask equipped with a stirrer, a thermometer, a nitrogen gas inlet tube, and a water separator was charged with 191.9 g of glycerin, 172.3 g of succinic acid (purity: 99.5%, trade name "Succinic Acid", manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), 291.5 g of caprylic acid (purity: 99% by mass or more, trade name "PALMAC99-08", manufactured by IOI Acidchem), and 194.3 g of capric acid (purity: 99% by mass or more, trade name "PALMAC99-10", manufactured by IOI Acidchem), and the mixture was heated to 230 to 240° C. under a nitrogen stream, and an esterification reaction was carried out for about 20 hours while removing the generated water. After the reaction was completed, excess acid was removed to obtain the target esterified product, oligoester ((caprylic acid / capric acid / succinic acid) triglyceryl). The obtained oligoester had an acid value of 0.7 mg KOH / g, a saponification value of 461, and a hydroxyl value of 6.3 mg KOH / g.

[0093] Synthesis Examples 2 to 4: Preparation of oligoesters Using the molar amounts and charge amounts shown in Table 2, esterification reactions were carried out in the same manner as in the preparation of oligoesters in Synthesis Example 1 to prepare oligoesters in Synthesis Examples 2 to 4.

[0094]

[0095] <Evaluation of Oligoesters> The oxidation stability of the oligoesters synthesized in Synthesis Example 1 was evaluated by a CDM test (standard fat and oil test method: 120°C, air: 20 L / h). In the test, the evaluation was performed by measuring the conductivity over time using a Rancimat 743 (manufactured by Metrohm). In the CDM test, the time to the inflection point where the conductivity rises sharply over time (induction time) is measured. It can be said that the longer the induction time, the better the oxidation stability, and those that do not show a large increase in conductivity have the best oxidation stability.

[0096]

[0097] The evaluation results are shown in Table 3. The oligoester of Synthesis Example 1 was superior to castor oil and diisostearyl malate in oxidation stability. Furthermore, the oligoester of Synthesis Example 1 showed no change in color before and after the test, and the change in odor was slight. Castor oil showed a yellowing of its color before and after the test, and emitted a deterioration odor, clearly indicating poor oxidation stability.

[0098] [Examples 1 to 9, Comparative Examples 1 to 7] Oily solid cosmetic preparations were produced according to the formulations shown in Tables 5 and 6, and a test of the solidification ability was carried out when combined with a plant-based wax or an animal-based wax.

[0099] <Production of Oil-Based Solid Cosmetic Preparations> Based on the formulations in Tables 5 and 6, all of the raw material ingredients were stirred and mixed while heated to 90°C, poured into a polypropylene container (diameter 36 mm, depth 11 mm), and cooled to room temperature to produce cylindrical oil-based solid cosmetic preparations.

[0100] <Evaluation of Hardness> Using a gel hardness tester (product name "Small Tabletop Tester EZ-Test EZ-SX", manufactured by Shimadzu Corporation), the oily solid cosmetic in the polycarbonate container was left to stand overnight in a thermostatic bath at 20°C, and then the maximum stress (gf) when a flat plunger with a diameter of 3 mm was pressed 0.4 mm into the oily solid cosmetic in the polycarbonate container was taken as the hardness.

[0101] <Evaluation of Hardness Improvement Effect> The hardness of oil-based solid cosmetics varies depending on the plant-based wax or animal-based wax used. Therefore, the hardness improvement effect of the oligoester blended in the produced oil-based solid cosmetic was evaluated by measuring the hardness of oil-based solid cosmetics made with castor oil and various plant-based waxes or animal-based waxes, and calculating the relative hardness value, with the hardness set to 1.

[0102] The hardness improvement effect was evaluated according to the following evaluation criteria: When the evaluation was a or b, it was determined that the hardness improvement effect was high.

[0103] Evaluation criteria for hardness improvement effect a: Relative hardness value of 1.05 or more b: Relative hardness value of 0.95 or more and less than 1.05 c: Relative hardness value less than 0.95.

[0104] Table 4 shows the hardness (gf) (basic data) of the oily solid cosmetic preparations used as the standard for the hardness-improving effect.

[0105]

[0106] <Evaluation of Oil Stain> The oil stains of the produced oil-based solid cosmetics were evaluated. Specifically, pressure was applied to the measurement sample with the index finger, and it was evaluated whether liquid oil seeped out around the area where pressure was applied. Products that seeped out liquid oil when pressure was applied tend to cause a deterioration in the feeling of use and makeup to come off. A rating of a or b was determined to have a high oil stain suppression effect.

[0107] Evaluation criteria for oil stains a: No liquid oil seeps out even when pressure is applied b: A small amount of liquid oil seeps out when pressure is applied c: Liquid oil clearly seeps out when pressure is applied

[0108]

[0109]

[0110] The evaluation results for each oil-based solid cosmetic preparation are shown in Tables 5 and 6. The oil-based solid cosmetic preparations prepared using the oligoesters of Synthesis Examples 1 to 3 and a vegetable wax or animal wax had a good hardness-enhancing effect and were resistant to oil staining. It has been known that castor oil can be combined with a vegetable wax or animal wax to prepare an oil-based solid cosmetic preparation with high hardness and good shape retention, but the oligoesters of Synthesis Examples 1 to 3 demonstrated even better performance (Examples 1 to 9).

[0111] On the other hand, the relative hardness values ​​of the oil-based solid cosmetics in which diisostearyl malate was blended instead of the oligoester of Synthesis Example 1 were all less than 1, and blending diisostearyl malate did not have any effect on improving hardness, and when combined with rice bran wax, beeswax, etc., the hardness was extremely low (Comparative Examples 1 to 5).

[0112] Furthermore, the relative hardness values ​​of oil-based solid cosmetics in which the oligoester of Synthesis Example 4 corresponding to component (2) was blended instead of the oligoester of Synthesis Example 1 and candelilla wax or beeswax was used as the wax were all less than 1, and blending the oligoester of Synthesis Example 4 did not have any effect in improving hardness (Comparative Examples 6 and 7).

[0113] Examples 10 to 27, Comparative Examples 8 to 10 Lip Cream Lip cream, an oily solid cosmetic product, was produced using the oligoesters of Synthesis Examples 1 to 3.

[0114] <Production of Lip Balm> Based on the formulations in Tables 7 to 10, all raw ingredients were mixed and stirred at 90°C, poured into a polypropylene container (diameter 36 mm, depth 11 mm), and cooled to room temperature to produce cylindrical lip balms. These cylindrical lip balms were used for hardness measurements and oil stain evaluations.

[0115] <Evaluation of Hardness> Using a gel hardness tester (product name "Small Desktop Tester EZ-Test EZ-SX", manufactured by Shimadzu Corporation), a flat plunger with a diameter of 3 mm was pressed 0.4 mm into the cylindrical lip balm in the polycarbonate container after it had been left standing overnight in a thermostatic chamber at 20°C. The maximum stress (gf) when this was done was taken as the hardness of the lip balm.

[0116] The hardness was evaluated according to the following evaluation criteria: When the evaluation was a, b, or c, it was determined that the hardness was sufficiently high and the shape retention was high.

[0117] Hardness evaluation criteria a: Hardness of 300 gf or more b: Hardness of 250 gf or more and less than 300 gf c: Hardness of 200 gf or more and less than 250 gf d: Hardness of 150 gf or more and less than 200 gf e: Hardness of 150 gf or less.

[0118] <Evaluation of Oil Stain> The oil stains of the produced oil-based solid cosmetics were evaluated. Specifically, pressure was applied to the measurement sample with the index finger, and it was evaluated whether liquid oil seeped out around the area where pressure was applied. Products that seeped out liquid oil when pressure was applied tend to cause a deterioration in the feeling of use and makeup to come off. A rating of a or b was determined to have a high oil stain suppression effect.

[0119] Evaluation criteria for oil stains a: No liquid oil seeps out even when pressure is applied b: A small amount of liquid oil seeps out when pressure is applied c: Liquid oil clearly seeps out when pressure is applied

[0120]

[0121]

[0122]

[0123]

[0124] The evaluation results of the lip balms are shown in Tables 7 to 10. The lip balms of Examples 10 to 27 had good hardness and resistance to oil staining. It was found that the hardness-improving effect and oil stain-inhibiting effect obtained by combining the oligoesters of Synthesis Examples 1, 2, and 3 with a plant-based wax or an animal-based wax are not significantly affected by other ingredients, and will likely be similarly exhibited in cosmetics with various compositions.

[0125] Example 28, Comparative Examples 11 and 12 Stick-type lip cream Using the oligoesters of Synthesis Examples 1 to 3, stick-type lip creams, which are oily solid cosmetics, were produced.

[0126] <Production of Lip Balm> Based on the formulation in Table 11, all raw materials were mixed and heated to 90°C, poured into a bullet-shaped lipstick mold, and cooled to room temperature to obtain a stick-shaped lip balm. At the same time, this was poured into a polypropylene container (diameter 36 mm, depth 11 mm) and cooled to room temperature to produce a cylindrical lip balm. The stick-shaped lip balm was used for evaluating the feel of use. The cylindrical lip balm was also used for measuring hardness and evaluating oil stains.

[0127] In Table 11, 1,2-hexanediol was "KMO-6" manufactured by Kankosha, and caprylyl glycol was "OC-Diol" manufactured by Ochem Trading Co., Ltd.

[0128] <Evaluation of Hardness> The hardness of each lip balm was evaluated in the same manner as in Example 10.

[0129] <Evaluation of Oily Stain> Oily stain of each lip cream was evaluated in the same manner as in Example 10.

[0130] <Evaluation of Usability> A panel of five experts compared each lip balm against commercially available lip balms in terms of "resistance to oil stains," "good adhesion," "good spreadability," and "high gloss" using a three-point scale: "excellent," "equal," or "inferior." The results are shown in Table 11.

[0131] Evaluation criteria for usability: a: 3 or more out of 5 people rated it as "superior" to commercially available lip balms. b: Not applicable to either a or c. c: 3 or more out of 5 people rated it as "inferior" to commercially available lip balms.

[0132]

[0133] The evaluation results of each lip balm are shown in Table 11. The lip balm of Example 28 had sufficient hardness as a stick-type cosmetic product, caused little oily staining during use, and had a good feel when used. In addition, there was no problem with the antiseptic properties.

[0134] Example 29 Lipstick (Stick Type) Using the oligoester of Synthesis Example 1, a stick type lipstick, which is an oily solid cosmetic product, was produced.

[0135] <Production of Lipstick> Based on the formulation in Table 12, all raw materials were mixed and stirred at 90°C until they were thoroughly homogenized, and then the mixture was degassed under reduced pressure and poured into a mold. The mold was then cooled to 20°C to obtain a lipstick (stick type).

[0136] In Table 11, pentaerythrityl tetraisostearate was "Salacos 5418V" manufactured by The Nisshin Oillio Group, Ltd., dipentaerythrityl hexa(hydroxystearate / stearic acid / rosinate) was "Cosmol 168ARV" manufactured by The Nisshin Oillio Group, Ltd., glyceryl (ethylhexanoate / stearic acid / adipate) was "Nomcort LAH" manufactured by The Nisshin Oillio Group, Ltd., di(phytosteryl / octyldodecyl) lauroyl glutamate was "Eldew PS-203" manufactured by Ajinomoto Co., Inc., sorbitan sesquiisostearate was "Cosmol 182V" manufactured by The Nisshin Oillio Group, Ltd., and caprylyl glycol was "OC-Diol" manufactured by Ochem Trading Co., Ltd.

[0137]

[0138] The lipstick produced had sufficient hardness for a stick-type cosmetic product, and had good application, spreadability, and gloss with little oil staining during use. It also provided long-lasting moisturizing sensation and good makeup wear.

[0139] Example 30 Lipstick (Stick Type) Using the oligoester of Synthesis Example 1, a stick type lipstick, which is an oily solid cosmetic, was produced.

[0140] <Production of Lipstick> Based on the formulation in Table 13, a lipstick (stick type) was obtained in the same manner as the lipstick of Example 29.

[0141] In Table 13, neopentyl glycol dicaprate was "Estemol N-01" manufactured by The Nisshin Oillio Group, phenyl trimethicone was "SH556 Fluid" manufactured by Toray Dow Corning, dipentaerythrityl pentaisostearate was "Salacos DP-518N" manufactured by The Nisshin Oillio Group, hydrogenated polyisobutene was "Pearleam 18" manufactured by NOF Corp., octyldodecanol was "N-Jecol 200A" manufactured by New Japan Chemical Co., Ltd., dipentaerythrityl hexahydroxystearate was "Cosmol 168M" manufactured by The Nisshin Oillio Group, dipentaerythrityl tetra(hydroxystearate / isostearate) was "Nisshin Oillio" The oils used were "Cosmol 168EV" manufactured by Nisshin Oillio Group, "Salacos WO-6" manufactured by Nisshin Oillio Group for dipentaerythrityl tri-polyhydroxystearate, "Plandool-G" manufactured by Nippon Fine Chemicals for dimer dilinoleyl bis(behenyl / isostearyl / phytosteryl) dimer dilinoleate, "OC-Diol" manufactured by Ochem Trading Co., Ltd. for caprylyl glycol, and "Nomcoat NW" manufactured by Nisshin Oillio Group for behenyl behenate.

[0142]

[0143] The produced lipstick had sufficient hardness as a stick-type cosmetic product, caused little oily staining during use, and had good adhesion, spreadability and gloss.

[0144] Example 31 Oil-Based Foundation The oligoester of Synthesis Example 1 was used to produce an oil-based foundation, which is an oil-based solid cosmetic product.

[0145] <Preparation of Oil-Based Foundation> Based on the formulation in Table 14, an oil-based foundation was obtained in the same manner as in Example 29, except that a metal dish was used instead of the mold.

[0146] In Table 14, the mineral oil used was "Carnation" manufactured by SONNEBORN, the cetyl ethylhexanoate used was "Salacos 816T" manufactured by Nisshin Oillio Group, and the caprylyl glycol used was "OC-Diol" manufactured by Ochem Trading Co., Ltd.

[0147]

[0148] The oil-based foundation produced had sufficient shape retention as an oil-based solid cosmetic product, and had little oil staining during use, and it spread well and was easy to apply. When the oil-based foundation was used, it left a beautiful finish with a natural luster, was not shiny, and the makeup lasted well. It also had a high effect of covering blemishes.

[0149] Example 32 Lip liner pencil Using the oligoester of Synthesis Example 1, a lip liner pencil, which is an oily solid cosmetic, was produced.

[0150] <Production of lip liner pencil> Based on the formulation in Table 15, the materials were kneaded together, and all ingredients except the volatile oil were melted at 100°C and mixed by stirring. The volatile oil was added to the resulting mixture, and the mixture was mixed by stirring at 80°C, filled into a container, and molded into a core body.

[0151] In Table 15, cyclopentasiloxane was "KF-995" manufactured by Shin-Etsu Chemical Co., Ltd., isododecane was "Marukasol R" manufactured by Maruzen Petrochemical Co., Ltd., sorbitan sesquiisostearate was "Cosmol 182V" manufactured by Nisshin Oillio Group, Ltd., and caprylyl glycol was "OC-Diol" manufactured by Ochem Trading Co., Ltd.

[0152]

[0153] The lip liner pencil thus produced had sufficient shape retention as a pencil-type cosmetic, caused little oily staining during use, and had good adhesion, spreadability, and gloss. The cosmetic also lasted well.

[0154] According to the present invention, it is possible to provide an oily solid cosmetic that contains a plant wax or an animal wax, has excellent shape retention, is effective in inhibiting oil stains during use, and has a good feel when used, and a hardness enhancer that is useful for producing the oily solid cosmetic.

Claims

1. Component (1): one or more waxes selected from vegetable waxes that are solid at 25°C and animal waxes that are solid at 25°C; and Component (3): an oligoester obtained by esterification reaction of component (A) glycerin, component (B) a divalent carboxylic acid having 2 to 12 carbon atoms, component (C) one or more fatty acids selected from the group consisting of caprylic acid, ethylhexanoic acid, isononanoic acid, isopalmitic acid, and isostearic acid, and component (D) one or more fatty acids selected from linear saturated fatty acids having 10 to 24 carbon atoms, wherein the esterification reaction is carried out by reacting component (A) with component (B) a divalent carboxylic acid having 2 to 12 carbon atoms, component (C) one or more fatty acids selected from the group consisting of caprylic acid, ethylhexanoic acid, isononanoic acid, isopalmitic acid, and isostearic acid, and component (D) one or more fatty acids selected from linear saturated fatty acids having 10 to 24 carbon atoms.

1. An oil-based solid cosmetic preparation comprising an oligoester having an acid value of 5 mgKOH / g or less, a saponification value of 420 to 510 mgKOH / g, and a hydroxyl value of 60 mgKOH / g or less, the mass ratio of the component (C) to the component (D) used in the esterification reaction being component (C):component (D)=10:90 to 99.9, the oligoester having an acid value of 5 mgKOH / g or less, a saponification value of 420 to 510 mgKOH / g, and a hydroxyl value of 60 mgKOH / g or less.

2. The oil-based solid cosmetic preparation according to claim 1, wherein the component (1) is one or more selected from the group consisting of carnauba wax, rice bran wax, candelilla wax, sunflower seed wax, and beeswax.

3. The oil-based solid cosmetic preparation according to claim 1, wherein the vegetable wax is one or more selected from the group consisting of carnauba wax, rice bran wax, candelilla wax, and sunflower seed wax.

4. The oil-based solid cosmetic according to claim 1, characterized in that the oil-based solid cosmetic does not contain any hydrocarbon wax (excluding vegetable waxes containing naturally derived hydrocarbon components and animal waxes containing naturally derived hydrocarbon components).

5. The oily solid cosmetic preparation according to claim 1, wherein the component (B) is succinic acid.

6. The oily solid cosmetic preparation according to claim 1, wherein the component (C) is caprylic acid.

7. The oily solid cosmetic preparation according to claim 1, wherein the component (D) is capric acid.

8. The oily solid cosmetic preparation according to claim 1, wherein said component (B) is succinic acid, said component (C) is caprylic acid, and said component (D) is capric acid.

9. The oil-based solid cosmetic preparation according to claim 1, further comprising: component (2): an oil-based component that is liquid or pasty at 20°C (excluding component (3)).

10. The oil-based solid cosmetic according to claim 1, wherein the content of said component (1) is 5 to 30 mass % and the content of said component (3) is 10 to 90 mass % based on the total mass of the oil-based solid cosmetic.

11. The oil-based solid cosmetic according to claim 9, wherein the content of said component (1) is 5 to 30 mass%, the content of said component (2) is more than 0 mass% and not more than 60 mass%, and the content of said component (3) is 10 to 90 mass%, based on the entire oil-based solid cosmetic.

12. The oil-based solid cosmetic preparation according to claim 9, wherein the mass ratio of said component (3) to the total amount of said component (2) and said component (3) ([content (g) of component (3)] / ([content (g) of component (2)]+[content (g) of component (3)]) is 0.2 to 1.

0.

13. The oil-based solid cosmetic preparation according to claim 1, further comprising: Component (4): one or more selected from the group consisting of 1,2-hexanediol, caprylyl glycol, ethylhexylglycerin, and phenoxyethanol.

14. The oily solid cosmetic according to any one of claims 1 to 13, which is a stick-type cosmetic.

15. A hardness enhancer for improving the hardness of an oil-based solid cosmetic, comprising an oligoester obtained by esterification reaction of glycerin as component (A), a divalent carboxylic acid having 2 to 12 carbon atoms as component (B), one or more fatty acids selected from the group consisting of caprylic acid, ethylhexanoic acid, isononanoic acid, isopalmitic acid, and isostearic acid as component (C), and one or more fatty acids selected from linear saturated fatty acids having 10 to 24 carbon atoms as component (D), wherein the esterification reaction is carried out by esterification reaction of 0.65 to 0.8 moles of component (B) and 1.2 to 1.7 moles of the total amount of component (C) and component (D) per mole of component (A), wherein the mass ratio of component (C) to component (D) used in the esterification reaction is component (C):component (D)=10:90 to 99.9, the oligoester has an acid value of 5 mgKOH / g or less, a saponification value of 420 to 510 mgKOH / g, and a hydroxyl value of 60 mgKOH / g or less; and the oil-based solid cosmetic is an oil-based solid cosmetic containing one or more waxes selected from a vegetable wax that is solid at 25°C and an animal wax that is solid at 25°C.

16. Use of an oligoester as a hardness enhancer for enhancing the hardness of an oil-based solid cosmetic, wherein the oligoester is obtained by an esterification reaction between glycerin as component (A), a divalent carboxylic acid having 2 to 12 carbon atoms as component (B), one or more fatty acids selected from the group consisting of caprylic acid, ethylhexanoic acid, isononanoic acid, isopalmitic acid, and isostearic acid as component (C), and one or more fatty acids selected from linear saturated fatty acids having 10 to 24 carbon atoms as component (D), wherein the esterification reaction is an esterification reaction of 0.65 to 0.8 moles of component (B) and 1.2 to 1.7 moles of the total amount of components (C) and (D) per mole of component (A), wherein the mass ratio of components (C) to (D) used in the esterification reaction is component (C):component (D)=10:90 to 99.9:0.1, The oligoester has an acid value of 5 mgKOH / g or less, a saponification value of 420 to 510 mgKOH / g, and a hydroxyl value of 60 mgKOH / g or less, and the oil-based solid cosmetic preparation is an oil-based solid cosmetic preparation containing one or more waxes selected from a plant-based wax that is solid at 25°C and an animal-based wax that is solid at 25°C.

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