JP7609573B2 - Hair cosmetics - Google Patents

Description

The present invention relates to hair cosmetics, and more specifically to hair cosmetics that are sprayed in a mist form and that not only impart damage care effects such as smoothness, moisture, and shine to damaged hair, but also make it easier to separate tangled, knotted, or caught hair, and to make it easier to style the hair with tools such as combs and brushes, or by combing with the hands.

It has become common to use in-bath or out-bath treatments to treat hair damage caused by factors such as washing, ultraviolet rays, dryness, and chemical treatments (perms, hair coloring, heat from hair dryers and irons, etc.) to give smoothness and shine to hair and make it easier to comb. Among these, leave-in out-bath hair cosmetics are commonly used, and hair treatments generally available on the market are called hair essences, hair creams, hair oils, hair mists, etc.

Ingredients such as silicone oil and ester oil are used to give hair a good shine without stickiness and to achieve a smooth and moist finish. In addition, many hair cosmetics have been proposed that spread and blend well when applied to hair, but also have the right level of viscosity to prevent the cosmetics from dripping from the hands when used (for example, Patent Document 1).

In addition, a mist cosmetic for hair has been proposed that contains a copolymer containing three specific structural units, a copolymer containing two specific structural units, ethanol, and water in specific ratios, with the aim of providing damaged hair with a moisturizing feel, smoothness, and manageability without stickiness, and also moisturizing the scalp (for example, Patent Document 2).

JP 2019-14695 A JP 2017-36229 A

However, hair cosmetics as described in Patent Document 1, which have a viscosity that does not drip from the hands when used, have the problem that it is difficult to apply evenly to the entire hair.

On the other hand, the hair mist cosmetic formulation containing water as described in Patent Document 2 has the problem that it is not sufficiently effective in loosening tangled, knotted, or caught hair.

The objective of the present invention is therefore to provide a hair cosmetic that not only provides damaged hair with damage care effects such as smoothness, moisture, and shine, but also is sprayed in a mist form that can be applied evenly to the entire hair and makes it easier to separate tangled, knotted, or caught hair.

The present inventors have conducted intensive research to solve the above-mentioned problems, and as a result have found that the above-mentioned problems can be solved by a hair cosmetic composition that is discharged in the form of a mist, comprising, based on the total mass of the hair cosmetic composition, (A) 30% to 60% by mass of a volatile oil agent having a kinetic viscosity at 25°C of 10 Pa s or less and a volatile content at 105°C for 24 hours of 50% or more, (B) 30% to 60% by mass of a lower alcohol, (C) one or more ester oils that are liquid at 20°C, and (D) a lactone derivative. Thus, the present invention has been completed.

The first invention relates to a hair cosmetic composition comprising:
(A) 30% by mass to 60% by mass of a volatile oil having a kinetic viscosity at 25°C of 10 Pa s or less and a volatile content at 105°C for 24 hours of 50% or more;
(B) lower alcohol 30% by mass to 60% by mass,
The hair cosmetic composition is discharged in the form of a mist and is characterized by containing (C) one or more ester oils that are liquid at 20° C. and (D) a lactone derivative.

The second invention is a hair cosmetic composition that is sprayed in the form of a mist, as described in the first invention, in which the contents are sprayed from an aerosol spray container equipped with a pump dispenser, a trigger dispenser, or an actuator.

The hair cosmetic composition of the present invention not only imparts damage care effects such as smoothness, moisturizing, and gloss to damaged hair, but also can be applied evenly to the entire hair, making it easier to separate tangled, knotted, or caught hair. Furthermore, due to such damage care effects and the effect of making hair easier to separate, it is easier to style the hair with tools such as combs and brushes or by combing with the hands.

The present invention is described in detail below.

[Hair cosmetics]
In the present invention, the hair cosmetic is a hair cosmetic that is discharged in the form of a mist, characterized in that it contains, based on the total mass of the hair cosmetic, (A) a volatile oil having a kinetic viscosity of 10 Pa·s or less at 25° C. and a volatile content of 50% or more at 105° C. for 24 hours, (B) a lower alcohol, (C) an ester oil that is liquid at 20° C., and (D) a lactone derivative in specific ratios. By blending these components (A) to (D) in a specific ratio, the effects of the present invention can be achieved. The hair cosmetic composition of the present invention may be of the leave-in type or the wash-out type as long as it can achieve the effects of the present invention, but is preferably of the leave-in type. Here, the "leave-in type hair cosmetic" is a so-called leave-in type hair cosmetic that is left on the hair without being washed off.

In the present invention, the formulation of the hair cosmetic is not limited as long as it can exert the effects of the present invention, but it is preferable that the hair cosmetic be one that is sprayed in the form of a mist from a pump dispenser, a trigger dispenser, or an aerosol spray container equipped with an actuator.

Below, we will explain in detail each component of the hair cosmetic product of the present invention.

[(A) Volatile oil agent]
The volatile oil (A) used in the hair cosmetic composition of the present invention is a volatile oil having a kinetic viscosity at 25° C. of 10 Pa·s or less and a volatile content at 105° C. for 24 hours of 50% or more.
In general, the volatile oil (A) is blended in hair cosmetics for the purpose of serving as a solvent, hair conditioning agent, or emollient. In the present invention, the kinetic viscosity of the volatile oil can be measured by a method commonly used in the art, for example, using an Ubbelohde viscometer according to ASTM D445-46T. In addition, in the present invention, the volatile content of the volatile oil can be measured by a method commonly used in the art, for example, according to JIS 0067-1992. In addition, in the present invention, a commercially available product may be used as the volatile oil (A). Examples of commercially available products that can be used in the present invention include, but are not limited to, Marukasol R (manufactured by Maruzen Petrochemical Co., Ltd.), Creasil ID CG (manufactured by CIT, Sarl), Pearlream 3 (manufactured by NOF Corp.), Pearlream 4 (manufactured by NOF Corp.), KF-96L-1cs (manufactured by Shin-Etsu Chemical Co., Ltd.), KF-96L-2cs (manufactured by Shin-Etsu Chemical Co., Ltd.), KF-96L-5cs (manufactured by Shin-Etsu Chemical Co., Ltd.), KF-96L-6cs (manufactured by Shin-Etsu Chemical Co., Ltd.), and the like. Such volatile oils can be used alone or in combination of two or more. If the kinetic viscosity of the (A) volatile oil is 10 Pa·s or less, the hair cosmetic composition of the present invention can be discharged in the form of a mist from a container, and if the volatile content at 105° C. for 24 hours is 50% or more, the effects of the other components of the present invention can be exhibited quickly after the hair cosmetic composition of the present invention is applied to hair.

The content of the volatile oil (A) in the hair cosmetic of the present invention is 30% to 60% by mass, preferably 35% to 55% by mass, and more preferably 40% to 50% by mass, based on 100% by mass of the hair cosmetic. When the content of the volatile oil (A) in the hair cosmetic of the present invention is within this range, the hair cosmetic can be applied evenly to hair, imparting appropriate moistness and shine to the hair while realizing a state in which the hair is not sticky.

[(B) Lower alcohol]
The lower alcohol (B) used in the hair cosmetic of the present invention is generally an alcohol having 5 or less carbon atoms, and is not particularly limited as long as it can be used in cosmetics and the like. In general, the lower alcohol (B) is blended into the hair cosmetic as a solvent. Examples include ethanol, propyl alcohol, isopropyl alcohol, isobutyl alcohol, and t-butyl alcohol. Of these, ethanol is preferably used. In the hair cosmetic of the present invention, the lower alcohol (B) can be used alone or in combination of two or more kinds.

The content of the lower alcohol (B) in the hair cosmetic of the present invention is 30% to 60% by mass, preferably 35% to 55% by mass, and more preferably 40% to 50% by mass, based on 100% by mass of the hair cosmetic. If the amount of the lower alcohol (B) in the hair cosmetic of the present invention is less than 30% by mass, the mist spray condition tends to deteriorate. If it is 60% by mass or more, the hair will lack smoothness, moisturization, and manageability.

[(C) Ester oil that is liquid at 20°C]
The ester oil (C) that is liquid at 20° C. used in the hair cosmetic composition of the present invention is an ester oil mainly composed of an ester of a fatty acid and an alcohol, and is generally blended in cosmetics for the purpose of hair conditioning agents, emollients, solubilizers, fat-adding agents, texture improvers, lubricants, surface modifiers, percutaneous absorption promoters, antioxidants, ultraviolet absorbers, etc. Examples of the ester oil (C) that is liquid at 20° C. in the present invention include, but are not limited to, esters of linear higher fatty acids and lower alcohols such as isopropyl myristate, butyl myristate, isopropyl palmitate, ethyl stearate, butyl stearate, ethyl oleate, and ethyl linoleate, cetyl caprylate, hexyl laurate, decyl myristate, myristyl myristate, cetyl palmitate, stearyl stearate, decyl oleate, and cetyl ricinoleate. Esters of linear higher fatty acids and linear higher alcohols; 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, octyldodecyl stearate, isodecyl oleate, and octyldodecyl oleate; Esters of branched fatty acids and lower alcohols; esters of branched fatty acids and linear higher alcohols, such as cetyl octanoate, cetostearyl octanoate, stearyl octanoate, and hexyl isostearate; 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, and pentaerythritol tetra 2-ethylhexanoate. esters of branched fatty acids and branched alcohols such as octyldodecyl neopentanoate, isocetyl octanoate, isostearyl octanoate, octyl isopelargonate, octyldodecyl neodecanoate, and isostearyl isostearate; lactate esters such as lauryl lactate, myristyl lactate, and cetyl lactate; esters of dibasic acids such as triethyl citrate, trioctyl citrate, triisocetyl citrate, diisostearyl malate, dioctyl succinate, diethyl sebacate, and dioctyl sebacate; etc. In the present invention, commercially available ester oils (C) that are liquid at 20° C. may be used. Examples of commercially available products that can be used in the present invention include, but are not limited to, Salacos 816T (manufactured by The Nisshin Oillio Group, Ltd.), CEH (manufactured by Koyu Alcohol Kogyo Co., Ltd.), Salacos 99 (manufactured by The Nisshin Oillio Group, Ltd.), Salacos P-8 (manufactured by The Nisshin Oillio Group, Ltd.), Salacos 5408 (manufactured by The Nisshin Oillio Group, Ltd.), Salacos GE-318 (manufactured by The Nisshin Oillio Group, Ltd.), EMALEX GWIS-320 (manufactured by Nippon Emulsion Co., Ltd.), EMALEX GWIS-320EX (manufactured by Nippon Emulsion Co., Ltd.), Militol 318 (manufactured by BASF Japan Co., Ltd.), Crodamol STS (manufactured by Croda), Crodamol SFX (manufactured by Croda), Ubinal MC-80 (manufactured by BASF Japan Co., Ltd.), and Parasol MCX-AS (manufactured by DSM Nutrition Japan Co., Ltd.). Such ester oils which are liquid at 20° C. can be used alone or in combination of two or more kinds.

The content of (C) ester oil that is liquid at 20°C in the hair cosmetic composition of the present invention is not particularly limited, but is preferably 1% to 10% by mass, and more preferably 3% to 8% by mass, based on 100% by mass of the hair cosmetic composition. If the content of (C) ester oil that is liquid at 20°C in the hair cosmetic composition of the present invention is 1% by mass or more, it is possible to impart hair treatment effects such as smoothness, moisturizing feeling, gloss, and manageability to hair, and if it is 10% by mass or less, excessive stickiness, which is one of the factors that cause tangles, entanglements, and difficulty in separating caught hair, does not occur.

[(D) Lactone derivative]
Examples of the lactone derivative (D) used in the hair cosmetic composition of the present invention include γ-lactone derivatives having a 5-membered ring and δ-lactone derivatives having a 6-membered ring. These lactone derivatives are preferably derivatives in which a linear or branched, saturated or unsaturated hydrocarbon group having 9 to 22 carbon atoms is added (replaced with hydrogen) to one of the carbon atoms constituting the 5-membered or 6-membered ring, and from the viewpoint of stability, a saturated hydrocarbon group is more preferable. Specific examples include nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group, octadecyl group, nonadecyl group, eicosyl group, heneicosyl group, and docosyl group. Specific examples of the substance names include γ-docosalactone, meadowfoam-δ-lactone, mevalonolactone, and gluconolactone. Among these, γ-docosalactone and meadowfoam-δ-lactone are preferred. Such lactone derivatives are generally incorporated into cosmetics as hair conditioning agents and emollient agents, and may be used alone or in combination of two or more.

The content of the (D) lactone derivative in the hair cosmetic of the present invention is not particularly limited, but is preferably 0.001% to 0.2% by mass, and more preferably 0.005% to 0.1% by mass, based on 100% by mass of the hair cosmetic. If the content of the (D) lactone derivative in the hair cosmetic of the present invention is within this range, tangled, matted, or caught hair can be easily separated, while providing the hair with an appropriate smoothness and moist feeling, making it easier to style.

[(E) Other Components]
The hair cosmetic composition of the present invention has the above-mentioned components (A) to (D) as essential components and is prepared by adding these to a liquid to which a solvent or the like has been added. In addition to these essential components, other components (E) that are generally blended into normal hair cosmetic compositions can also be blended according to the purpose, provided that the effects of the present invention are not impaired.

Examples of such other components include water; nonionic surfactants such as polyoxyethylene alkyl ethers, polyoxyethylene sorbitan fatty acid esters, and glycerin fatty acid esters; cationic surfactants such as stearyl trimethyl ammonium chloride and alkyl trimethyl ammonium chloride; dimethyl silicones (e.g., methyl polysiloxane, octamethyl trisiloxane, decamethyl tetrasiloxane, highly polymerized methyl polysiloxane, etc.), methyl phenyl silicones, cyclic dimethyl silicones (e.g., octamethyl cyclotetrasiloxane, decamethyl cyclopentasiloxane, etc.), and the like. silicones other than component (A), such as methylhydrogen silicone, alcohol-modified silicone (e.g., stearoxymethylpolysiloxane, setoxymethylpolysiloxane, etc.), alkyl-modified silicone, and amino-modified silicone; higher alcohols, such as cetanol and stearyl alcohol; wetting agents, such as glycerin, propylene glycol, butylene glycol (BG), dipropylene glycol, and glycosyl trehalose; stearic acid, behenic acid, oleic acid, isostearic acid, and 2-ethylhexanoic acid. higher fatty acids; hydrocarbons such as liquid isoparaffin, petrolatum, and squalane; anti-dandruff ingredients such as zinc pyrithione and benzalkonium chloride; cooling agents such as l-menthol and peppermint oil; almond oil, avocado oil, linseed oil, argania spinosa kernel oil, apricot kernel oil, strawberry seed oil, perilla oil, olive oil, orange oil, rose canina oil, apricot kernel oil, crambe _{abyssinica seed oil} , grape seed oil, sesame seed oil, rice bran oil, camellia oil, safflower oil, shea butter, peppermint oil, soybean oil, tea seed oil, tea seed oil, camellia seed oil, rapeseed oil, sunflower seed oil, grape seed oil, hazel Examples of suitable additives include vegetable oils such as corn oil, jojoba oil, peach kernel oil, coconut oil, tea oil, lemon oil, rosehip oil, and rosemary oil; amino acids such as L-aspartic acid, sodium L-aspartate, DL-alanine, L-arginine, glycine, L-glutamic acid, L-cysteine, and L-threonine; propellant gases such as liquefied petroleum gas and dimethyl ether; low molecular weight compounds such as 12-hydroxystearic acid, dibenzylidene sorbitol, and amino acid derivatives; and others, ultraviolet absorbers, preservatives, sugars, plant-derived extracts, animal-derived extracts, fragrances, colorants, sequestering agents, antioxidants, and various other drugs.

The hair cosmetic of the present invention can be used in liquid hair cosmetics such as hair lotion, hair liquid, hair mist, hair water, and hair oil, and in aerosol hair cosmetics such as hair spray, and is particularly preferably used in leave-on type hair cosmetics such as hair mist and hair spray. The hair cosmetic of the present invention can be produced by a conventional method.

The following provides a more detailed explanation of the embodiments of the present invention by way of examples. However, the present invention is not limited to these examples.

[Sample preparation]
The following samples were prepared by a conventional method using the ingredients and amounts shown in Tables 1 and 2. As for other ingredients, the hair mist contained water, butylene glycol (BG), fragrance, etc., as appropriate.

[Preparation of hair samples]
In order to evaluate the usefulness of the hair cosmetic composition of the present invention, first, hair was treated by the following method. Commercially available hair (10 g, 30 cm, Beaulax) was shampooed with 2 g of a 10% by mass aqueous solution of polyoxyethylene (2E.O.) lauryl ether sodium sulfate, thoroughly rinsed with hot water, bleached three times, and shampooed again. Then, the hair was towel-dried and dried with a hair dryer. Next, the hair cosmetic compositions of the examples and comparative examples shown in Tables 1 and 2 below were filled into a 100 mL container equipped with a pump-type dispenser capable of discharging 0.15 mL of mist at a time, and 0.5 g of each composition was sprayed as a hair mist. After natural drying, the damage care effects on the hair, such as smoothness, moist feeling, and luster, were evaluated.

[Evaluation of Hair Samples]
The hair samples prepared as described above were evaluated for the following indices. Comparative Example 4 is an example of a commercially available product corresponding to Patent Document 1, and Comparative Example 5 is an example of a commercially available product corresponding to Patent Document 2.

(1) Smoothness The smoothness of hair was evaluated by measuring the dynamic friction coefficient. The dynamic friction coefficient of hair was measured using a friction tester (KES-SE type, manufactured by Kato Tech Co., Ltd.) with a silicone sheet attached as a friction element, and the dynamic friction coefficient (MIU value) was measured under conditions of a load of 50 g and a moving speed of 1 mm/sec, and the average value of 20 hair bundles was calculated. The lower the dynamic friction coefficient, the smoother the hair. The evaluation criteria are as follows:
◎: Very good, less than 0.2 ○: Good, 0.2 or more and less than 0.3 △: Slightly poor, 0.3 or more and less than 0.4 ×: Poor, 0.4 or more

(2) Moisturizing Feeling The moisturizing feeling of the hair was evaluated by 20 expert panelists according to the following criteria:
◎: Very good, 15 or more subjects answered that it felt moist. ○: Good, 10 or more but less than 15 subjects answered that it felt moist. △: Fair, 7 or more but less than 10 subjects answered that it felt moist. ×: Bad, less than 7 subjects answered that it felt moist.

(3) Luster Using the SAMBA Hair System (manufactured by Bossa Nova Vision), the luster value of 20 hair bundles was measured and the average value was calculated. Note that the higher the luster value, the more lustrous the hair. The evaluation criteria are as follows:
◎: Very good 40 or more ○: Good 35 or more but less than 40 △: Slightly poor 30 or more but less than 35 ×: Poor Less than 30

(4) Hair untangling effect A comb was attached to the tip of a digital force gauge (DPS-5R, manufactured by Imada Co., Ltd.) so that the tensile load when combing could be measured. Using this, the tensile combing load (kgf) of intentionally tangled hair bundles was measured 20 times, and the average value for the 20 hair bundles was calculated. The lower the load value, the easier it was for tangled hair to come undone. The evaluation criteria were as follows:
◎: Very good, less than 1.0 ○: Good, 1.0 or more and less than 1.5 △: Slightly poor, 1.5 or more and less than 2.0 ×: Poor, 2.0 or more

(5) Confirmation of spray state The hair cosmetic compositions of the examples and comparative examples shown in Tables 1 and 2 below were filled into a 100 mL container equipped with a pump dispenser capable of discharging 0.15 mL of mist at a time, and a test was carried out to confirm the spray state when the contents were discharged. The evaluation criteria were as follows:
⊚: The mist form is maintained.
○: The spray condition is slightly worse (the mist is coarse, the mist does not spread much, etc.).
Δ: The spray condition is poor (e.g., misdirection or droplet ejection is observed).
×: Cannot be discharged (sprayed) in mist form.

The formulations and evaluation results for Examples 1 to 5 and Comparative Examples 1 to 7 are shown in Tables 1 and 2 below.

As is clear from Tables 1 and 2, Examples 1 to 5 of the hair cosmetic composition of the present invention all showed superior performance compared to the compositions of Comparative Examples 1 to 7. Therefore, it was found that the hair cosmetic composition of the present invention not only provides damage care effects such as smoothness, moisturization, and shine to damaged hair, but also exhibits excellent performance of making it easier to separate tangled, knotted, and caught hair and to style the hair with tools such as combs and brushes or by combing with the hands.

Below are examples of formulations of the hair cosmetic composition of the present invention. The hair cosmetics of these formulations were also examined for their damage care effects on hair, such as the smoothness, moist feeling, and shine described above, their effect of making tangled, knotted, and caught hair easier to separate and easier to style with tools such as combs and brushes or by hand, and their mist state. All of the formulations were found to have excellent properties and were good.

Formulation Example 1 (Hair Oil Mist) (%)
(1) Isododecane 45.0
(2) Ethanol 45.0
(3) Caprylic/capric triglyceride 2.0
(4) Myristic acid PPG-3 benzyl ether 1.5
(5) PEG-20 glyceryl triisostearate 1.5
(6) Diethyl sebacate 1.0
(7) Ethylhexyl methoxycinnamate 0.2
(8) γ-docosalactone 0.1
(9) BG 0.5
(10) (bisisobutyl PEG-14/amodimethicone) copolymer 0.5
(11) Shea butter 0.2
(12) Lactoferrin 0.2
(13) Yogurt liquid 0.2
(14) Glycyrrhizic acid 2K 0.2
(15) Purified water Remainder

(Production method) (1), (3), (4), (6), and (7) were mixed and dissolved uniformly in (2), and (8), (10), and (11) were added. After that, a uniform dispersion of (5), (9), and (12) to (15) prepared in a separate tank was added and mixed uniformly. The mixture was then filled into a pump dispenser container to prepare the hair mist.

Formulation Example 2 (Hairspray) (%)
(1) Hydrogenated polyisobutene 35.0
(2) Ethanol 35.6
(3) Caprylic/capric triglyceride 3.0
(4) Myristic acid PPG-3 benzyl ether 2.0
(5) Isopropyl palmitate 1.0
(6) Ethylhexyl methoxycinnamate 1.0
(7) γ-docosalactone 0.1
(8) Meadowfoam-δ-lactone 0.1
(9) Dimethicone 2.0
(10) Shea butter 0.2
(11) LPG (0.2) 20.0

(Production method) (1), (3) to (6), and (9) were uniformly mixed and dissolved in (2), and then (7), (8), and (10) were added and mixed uniformly. The mixture was then poured into an aerosol container, plugged, and then (11) was added. An actuator was attached to prepare a hair spray.

Claims (1)

Based on the total weight of the hair cosmetic,
(A) a volatile oil having a kinetic viscosity at 25°C of 10 Pa s or less and a volatile content at 105°C for 24 hours of 50% or more, the volatile oil being 40 % by mass to 50 % by mass of isododecane and/or hydrogenated polyisobutene ;
(B) 30% by mass to 60% by mass of ethanol,
(C) myristic acid PPG-3 benzyl ether (D) γ-docosalactone;
A hair cosmetic composition which is sprayed in the form of a mist by a pump-type dispenser or a trigger-type dispenser.