Oil-based solid hair cosmetic

Abstract

To provide an oil-based solid hair cosmetic that leaves hair non-greasy, is easy to comb through, dissolves easily, is easy to remove, has good high-temperature stability, and suppresses surface cracking and fissures. [Solution] The oily solid hair cosmetic contains (A) animal waxes and petroleum waxes that are solid at 25°C, (B) hydrocarbon oils and / or ester oils that are liquid at 25°C, (C) petrolatum and vegetable oils with an iodine value of 45 or less that are paste-like at 20°C, and (D) cholesterol, with the amount of component (D) being 0.05 to 2% by mass of the total amount of the oily solid hair cosmetic.

Description

Technical Field

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

Background Art

[0002] Oily solid hair cosmetics include preparations that are solid at room temperature, such as hair sticks and hair balms, and are known to mainly contain semi-solid to solid oils as the main component.

[0003] Conventional oily solid hair cosmetics contain a large amount of semi-solid to solid oils, so there are problems such as the hair being sticky, difficult to run the fingers through, difficult to handle, and the agent being difficult to remove. Therefore, there was a method of blending paste oil to achieve this (see, for example, Patent Document 1). However, this oily solid hair cosmetic had a problem of insufficient high-temperature stability. Therefore, there were attempts to solve the problem of high-temperature stability by examining the ratio of solid oil to liquid oil (see, for example, Patent Document 2). However, in this oily solid hair cosmetic, although the stickiness of the hair, poor finger-through, poor handling, difficulty in removing the agent, and poor high-temperature stability were improved, new problems such as surface cracks and fissures occurred.

[0004] On the other hand, although it is known that "cholesterol" is used to improve the setting property, resetting property, and adhesion of emulsifiers (see, for example, Patent Document 3), it has not been used in oily solid hair cosmetics.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

[0006] This invention has been made in view of the above circumstances, and aims to provide an oil-based solid hair cosmetic that does not leave hair sticky, has good manageability, is easy to handle and remove, has good high-temperature stability, and suppresses cracking and fissures on the surface. [Means for solving the problem]

[0007] In light of the above problems, the inventors conducted diligent research and found that by combining (A) solid animal waxes and petroleum waxes at 25°C, (B) liquid hydrocarbon oils and / or ester oils at 25°C, (C) petrolatum and vegetable oils with an iodine value of 45 or less that are paste-like at 20°C, and (D) cholesterol, the problems of sticky hair, poor manageability, difficulty in removing the agent due to poor handling, poor high-temperature stability, and surface cracking and fissures can be solved, thus completing the present invention.

[0008] In other words, the present invention is An oil-based solid hair cosmetic, It contains the following ingredients (A) to (D), The amount of ingredient (D) included is 0.05 to 2% by mass relative to the total amount of the oil-based solid hair cosmetic. (A) Animal waxes and petroleum waxes that are solid at 25°C (B) Liquid hydrocarbon oils and / or ester oils at 25°C (C) Petrolatum and vegetable oils with an iodine value of 45 or less that form a paste at 20°C (D) Cholesterol

[0009] Furthermore, it is preferable that the oily solid hair cosmetic composition of the present invention contains 5 to 25% by mass of component (A).

[0010] Furthermore, it is preferable that the oily solid hair cosmetic composition of the present invention contains 1 to 20% by mass of component (C).

[0011] Furthermore, it is preferable that the oily solid hair cosmetic composition of the present invention contains 70 to 85% by mass of component (B). [Effects of the Invention]

[0012] According to the present invention, it is possible to provide an oil-based solid hair cosmetic that does not leave hair sticky, has good manageability, is easy to handle and remove, has good high-temperature stability, and suppresses surface cracking and fissures. [Modes for carrying out the invention]

[0013] The present invention will now be described in detail. The present invention is not limited to the following embodiments. The present invention is not limited to the configurations described below, and various modifications are possible within the scope of the claims. Embodiments and examples obtained by appropriately combining the technical means disclosed in different embodiments and examples are also included in the technical scope of the present invention. Furthermore, unless otherwise specified in this specification, "A to B" representing a numerical range means "greater than or equal to A and less than or equal to B".

[0014] Furthermore, in this specification, "stickiness" refers to the ability to run fingers through the hair without snagging, and to feel no resistance or stiffness at the roots when pinched and pulled. Also, "melts easily by hand" refers to the ability to quickly turn into a liquid when the product is taken in the hand and spread, resulting in little resistance between the hands.

[0015] [Oil-based solid hair cosmetic] The oily solid hair cosmetic according to this embodiment contains (A) animal waxes and petroleum waxes that are solid at 25°C, (B) hydrocarbon oils and / or ester oils that are liquid at 25°C, (C) petrolatum and vegetable oils with an iodine value of 45 or less that are paste-like at 20°C, and (D) cholesterol.

[0016] [Ingredients (A)] In this embodiment, component (A) of the oily solid hair cosmetic is an animal wax and a petroleum wax, and it is essential that it exhibits a solid form at 25°C. Here, "solid form" refers to a crystalline form.

[0017] As solid animal waxes and petroleum waxes at 25°C, specifically, beeswax, whale wax, shellac wax, and candelilla wax can be cited as solid animal waxes at 25°C, and paraffin wax, microcrystalline wax, petrolatum, and slack wax can be cited as solid petroleum waxes at 25°C. Among these, a combination of beeswax and microcrystalline wax is preferable in terms of stickiness to hair, feel when passing through fingers, ease of handling and removal of the agent, high-temperature stability, and surface cracking and fissuring.

[0018] In the oil-based solid hair cosmetic according to this embodiment, the blending amount of the solid animal waxes and petroleum waxes, which are component (A), at 25°C is not particularly limited, but from the viewpoint of further suppressing the occurrence of surface cracking and fissuring, it is preferably 5 to 25% by mass, more preferably 10 to 20% by mass, based on the total amount of the oil-based solid hair cosmetic.

[0019] [Component (B)] Component (B) in the oil-based solid hair cosmetic according to this embodiment is a hydrocarbon oil and / or ester oil that is liquid at 25°C. Component (B) is generally blended in cosmetics for purposes such as hair conditioning agents, emollient agents, solubilizing agents, fatting agents, feel improvers, lubricants, surface modifiers, percutaneous absorption promoters, antioxidants, ultraviolet absorbers, etc., and in the oil-based solid hair cosmetic according to this embodiment, it dissolves or disperses component (A).

[0020] As the hydrocarbon oil that is liquid at 25°C, specifically, for example, α-olefin oligomers, squalane (synthetic squalane, vegetable squalane), squalene, liquid isoparaffin, liquid paraffin (mineral oil), (C13-15) alkane, isododecane, hydrogenated polyisobutene, hydrogenated polydecene, light isoparaffin (isododecane), light liquid isoparaffin, and liquid isoparaffin, etc. can be cited. Among these, it is preferably non-volatile at 25°C, and liquid paraffin, squalane, etc. are preferable.

[0021] The ester oil that is liquid at 25°C mainly consists of esters of fatty acids and alcohols. Specific examples thereof include esters of linear higher fatty acids and lower alcohols such as isopropyl myristate, butyl myristate, isopropyl palmitate, ethyl stearate, butyl stearate, ethyl oleate, ethyl linoleate, etc., esters of linear higher fatty acids and linear higher alcohols such as cetyl caprylate, hexyl laurate, decyl myristate, myristyl myristate, cetyl palmitate, stearyl stearate, decyl oleate, cetyl ricinoleate, laurin, etc., esters of linear fatty acids and branched alcohols such as isostearyl laurate, isotridecyl myristate, isocetyl myristate, isostearyl myristate, octyldodecyl myristate, octyl palmitate, isocetyl palmitate, isostearyl palmitate, isocetyl stearate, isodecyl oleate, octyldodecyl oleate, etc., esters of branched fatty acids and lower alcohols such as ethyl isostearate, isopropyl isostearate, etc., esters of branched fatty acids and linear higher alcohols such as cetyl octanoate, cetostearyl octanoate, stearyl octanoate, hexyl isostearate, etc., esters of fatty acids and polyhydric alcohols such as ethylene glycol dioctanoate, ethylene glycol dioleate, propylene glycol dicaprylate, propylene glycol dicaprate, propylene glycol dioleate, neopentyl glycol dicaprate, triethyl hexanoin, pentaerythrityl tetraethylhexanoate, etc., esters of branched fatty acids and branched alcohols such as octyldodecyl neopentanoate, isocetyl octanoate, isostearyl octanoate, octyl isopalmitate, octyldodecyl neodecanoate, isostearyl isostearate, etc., lactate esters such as lauryl lactate, myristyl lactate, cetyl lactate, etc., esters of dibasic acids such as triethyl citrate, trioctyl citrate, triisocetyl citrate, diisostearyl malate, dioctyl succinate, dioctyl sebacate, etc. Further, natural-derived ones include castor oil, jojoba oil, etc.

[0022] A single type of hydrocarbon oil and / or ester oil that is liquid at 25°C may be used, or two or more types may be used in combination.

[0023] In the oily solid hair cosmetic composition according to this embodiment, the amount of component (B), which is a hydrocarbon oil and / or ester oil that is liquid at 25°C, is not particularly limited, but from the viewpoint of further reducing stickiness of the hair and improving manageability, and improving ease of handling and removal of the agent, it is preferably 70 to 85% by mass of the total amount of the oily solid hair cosmetic composition.

[0024] [Component (C)] In this embodiment, component (C) of the oily solid hair cosmetic is petrolatum and a vegetable oil with an iodine value of 45 or less that is paste-like at 20°C. In this specification, "paste-like (semi-solid) at 20°C" refers to an oil that has a melting point at a temperature above 20°C and does not completely solidify at 20°C, thus distinguishing it from liquid oils and solid oils. Component (C) is mainly used as an ingredient that prevents hair from becoming sticky, allows for easy handling, dissolves easily in the hand and is therefore easy to remove, has good high-temperature stability, and does not crack or fissure on the surface.

[0025] Vaseline is an amorphous hydrocarbon oil whose main component is hydrocarbons with 24 to 34 carbon atoms. It is obtained by refining an ointment-like substance obtained when the residue of vacuum distillation of crude petroleum oil is dewaxed with a solvent. Commercially available refined Vaseline, commonly used in cosmetics, can be used.

[0026] Vegetable oils are oils obtained from plants, and their iodine value varies. The iodine value is the number of grams of iodine that can be added to 100g of oil or fat; a higher iodine value indicates a higher degree of unsaturation of fatty acids in the sample. Because of the differences in iodine value, it is necessary to select an oil that is appropriate for the intended purpose, considering the rate and degree of solidification.

[0027] Vegetable oils with an iodine value of 100 or less are classified as non-drying oils, meaning they do not solidify in the air. Examples include olive oil, tonsil oil, peanut oil, coconut oil, camellia oil, and rapeseed oil. Vegetable oils with an iodine value of 130 to 100 are classified as semi-drying oils. These react in the air, reducing their fluidity, but they do not solidify completely. Examples include corn oil, cottonseed oil, sesame oil, and soybean oil. Furthermore, vegetable oils with an iodine value of 130 or more are classified as drying oils, meaning they solidify completely in the air. Examples include linseed oil, tung oil, poppy seed oil, perilla oil, walnut oil, sesame oil, safflower oil, and sunflower oil.

[0028] The vegetable oil used in component (C) of the oily solid hair cosmetic according to this embodiment is paste-like at 20°C and has an iodine value of 45 or less. Vegetable oils with an iodine value of 45 or less exhibit a low iodine value among non-drying oils, are less prone to oxidation in air, and do not solidify. Examples of non-drying oils that are paste-like at 20°C and have an iodine value of 45 or less include palm kernel oil, Astrocaryum murumuru seed oil, and coconut oil.

[0029] The amount of petrolatum and vegetable oil with an iodine value of 45 or less, which are component (C) in the oily solid hair cosmetic composition according to this embodiment, is not particularly limited, but from the viewpoint of further suppressing the occurrence of cracks and fissures on the surface, it is preferably 1 to 20% by mass, and more preferably 2 to 20% by mass, relative to the total amount of the oily solid hair cosmetic composition.

[0030] [Component (D)] In this embodiment, component (D) in the oily solid hair cosmetic is cholesterol. Cholesterol contributes to maintaining the beautiful appearance of the oily solid hair cosmetic, that is, to preventing cracks and fissures on the surface. The amount of cholesterol, which is component (D) in the oily solid hair cosmetic according to this embodiment, is 0.05 to 2% by mass of the total amount of the oily solid hair cosmetic, and is preferably 0.1 to 1.5% by mass from the viewpoint of further suppressing cracks and fissures on the surface.

[0031] The oil-based solid hair cosmetic according to this embodiment contains the components (A), (B), (C), and (D) described above, and by setting the content of component (D) to 0.05 to 2% by mass relative to the total amount of the oil-based solid hair cosmetic, the following effects are achieved: the hair is not sticky, it is easy to comb, it is easy to dissolve and remove, it has good high temperature stability, and it suppresses cracks and fissures on the surface.

[0032] [Other ingredients] In addition to the above-mentioned components, the oil-based solid hair cosmetic composition according to this embodiment may also contain other components commonly used in oil-based solid hair cosmetic compositions, as long as they do not impair the effects of the present invention.

[0033] Examples of such ingredients include UV absorbers, humectants, film-forming agents, anti-fading agents, antioxidants, defoamers, preservatives, fragrances, surfactants, plant and animal extracts, physiologically active ingredients, water, powders, silicones, other oils and fats, other paste oils, oil gelling agents, preservatives, metal ion chelating agents, surfactants, and dyes.

[0034] The oily solid hair cosmetic composition according to this embodiment can be used in hair cosmetics such as hair sticks and hair balms. Furthermore, the oily solid hair cosmetic composition according to this embodiment can be manufactured by heating and melting oily components at 80 to 100°C according to a conventional method, thoroughly stirring and mixing them, filling the molten state into a container, and allowing it to cool.

[0035] The present invention includes the following embodiments. [1] An oily solid hair cosmetic, It contains the following ingredients (A) to (D), An oil-based solid hair cosmetic in which the amount of ingredient (D) is 0.05 to 2% by mass of the total amount of the oil-based solid hair cosmetic. (A) Animal waxes and petroleum waxes that are solid at 25°C (B) Liquid hydrocarbon oils and / or ester oils at 25°C (C) Petrolatum and vegetable oils with an iodine value of 45 or less that form a paste at 20°C (D) Cholesterol [2] The oil-based solid hair cosmetic described in [1] above, wherein component (A) is present in an amount of 5 to 25% by mass relative to the total amount of the oil-based solid hair cosmetic. [3] The oil-based solid hair cosmetic according to [1] or [2] above, wherein component (C) is contained in an amount of 1 to 20% by mass relative to the total amount of the oil-based solid hair cosmetic. [4] An oil-based solid hair cosmetic according to any one of [1] to [3] above, containing 70 to 85% by mass of component (B) based on the total amount of the oil-based solid hair cosmetic. [Examples]

[0036] Next, the oily solid hair cosmetic composition according to this embodiment will be described in detail by illustrating examples and comparative examples, but this is not intended to limit or restrict the scope of the invention disclosed in this application. First, the test methods and evaluation methods used in each example will be described.

[0037] [Preparation of hair samples] Hair was treated using the following method: Commercially available hair (10g, 30cm, manufactured by Beaulux) was shampooed with 2g of a 10% by mass aqueous solution of polyoxyethylene (2E.O.) lauryl ether sodium sulfate, rinsed thoroughly with warm water, towel-dried, and then dried with a hairdryer. Next, 0.5g of the oily solid hair cosmetic products shown in Tables 1 and 2 as hair balm was uniformly applied and allowed to air dry. These samples were then used as hair samples for each example and comparative example, and their effects on the hair were evaluated.

[0038] [Evaluation of hair samples] Using the hair samples prepared as described above, the following indicators were evaluated.

[0039] (Hair greasiness, manageability) Using a digital force gauge (manufactured by Imada Corporation), the load on 20 strands of hair was measured, and the average value was calculated. Note that the higher the load, the stickier the hair and the easier it is to comb through. This indicates that the quality is poor.

[0040] <Judgment criteria> ◎: Weighted average less than 12g ○: Weighted average value 12g or more and less than 13g △: Weighted average value 13g or more and less than 14g ×: Weighted average value of 14g or more

[0041] (Ease of removal of the agent, ease of dissolving by hand) A sensory test was conducted on a panel of 10 experts, in which 0.5g of the solid hair cosmetic shown in the examples and comparative examples was taken from the container, and the ease with which the solid hair cosmetic dissolved in the hand and could be removed was evaluated according to the judgment criteria shown below.

[0042] <Judgment criteria> ◎: More than 8 panelists judged the agent to be easy to remove and dissolve well by hand. ○: Six to eight panelists judged the product to be easy to remove and dissolve well by hand. △: Four to six panelists judged the agent to be easy to remove and dissolve well by hand. ×: Fewer than 4 panelists judged the agent to be easy to remove or dissolve easily.

[0043] (high temperature stability) The sample was filled into 50 mL glass bottles at a rate of 30 g each, stored at 45°C for one month, and then the appearance of the agent was visually evaluated.

[0044] <Judgment criteria> ◎: No changes in appearance, in a very stable condition. ○: The appearance has changed slightly, and the agent has dissolved a little, but it is still within an acceptable range for its function. ×: The appearance has changed considerably, and the agent has dissolved.

[0045] (Cracks on the surface) The sample was filled into 50 mL glass bottles at a rate of 30 g each, left at room temperature for one day, and then the appearance of the agent was visually evaluated.

[0046] <Judgment criteria> ○: The exterior remains unchanged and the surface is in excellent condition. ×: There are cracks or dents on the surface.

[0047] The formulations and evaluation results for Examples 1-10 and Comparative Examples 1-12 are shown in Tables 1 and 2.

[0048] [Table 1]

[0049] [Table 2]

[0050] As is clear from Tables 1 and 2, Examples 1 to 10 all showed superior performance compared to the compositions of Comparative Examples 1 to 12. Comparative Examples 1 to 12 were inferior in one or more respects: the hair of the composition was not sticky, it was easy to comb, it was easy to remove the agent because it was easy to handle, it had good high-temperature stability, or it was prone to cracking or fissures on the surface.

[0051] Below is one example of a formulation of the oily solid hair cosmetic composition of the present invention. Regarding the oily solid hair cosmetic composition of Formulation Example 1, we examined each item concerning the above-mentioned properties: the hair is not sticky, it is easy to comb, it has good high-temperature stability, and it is resistant to cracking and fissures on the surface. All formulations exhibited excellent properties and were deemed satisfactory.

[0052] Prescription Example 1: Hair Stick (mass %) (1) Cholesterol 1.5 (2) Beeswax 15.0 (3) Microcrystalline wax 5.0 (4) Astrocaryum murumuru seed oil 0.5 (5) Tri(caprylic / capric acid / Glyceryl myristate / stearate 3.0 (6) Vaseline 14.0 (7) Squalane 1.5 (8) Fragrance 0.25 (9) Castor oil Remainder

[0053] (Manufacturing Method) The oily solid hair cosmetic composition having the above composition was manufactured by heating and melting the oily components at 80-100°C according to conventional methods, thoroughly stirring and mixing them, filling the molten state into a container, and allowing it to cool.

Claims

1. An oil-based solid hair cosmetic, It contains the following ingredients (A) to (D), An oil-based solid hair cosmetic in which the amount of ingredient (D) is 0.05 to 2% by mass of the total amount of the oil-based solid hair cosmetic. (A) Animal waxes and petroleum waxes that are solid at 25°C (B) hydrocarbon oils and / or ester oils that are liquid at 25°C (C) Petrolatum and vegetable oils with an iodine value of 45 or less that form a paste at 20°C (D) Cholesterol

2. The oil-based solid hair cosmetic according to claim 1, wherein component (A) is contained in an amount of 5 to 25% by mass relative to the total amount of the oil-based solid hair cosmetic.

3. The oil-based solid hair cosmetic according to claim 1 or claim 2, wherein component (C) is contained in an amount of 1 to 20% by mass relative to the total amount of the oil-based solid hair cosmetic.

4. The oil-based solid hair cosmetic according to claim 1 or claim 2, wherein component (B) is contained in an amount of 70 to 85% by mass relative to the total amount of the oil-based solid hair cosmetic.

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