JP7596087B2 - O/D type composition - Google Patents

Description

The present invention relates to an O/D type composition for use in hair applications, etc.

It is generally known that liquid oils are blended into compositions to be applied to hair in order to impart moisture, shine, smoothness, and manageability to the hair. As an example of such a hair composition, Patent Document 1 discloses a blend of liquid oils such as decamethylcyclopentasiloxane, liquid paraffin, and oleyl oleate together with cationic surfactants such as diglycerin, glycerin, and behentrimonium methosulfate, and higher alcohols such as behenyl alcohol (see Example 1, etc.).

JP 2011-98888 A

Incidentally, for any composition distributed on the market, not just hair compositions, it is necessary to suppress changes in appearance in order to give consumers and users a sense of security regarding the quality. This is required not only for formulations such as O/W emulsions and W/O emulsions, but also for O/D type compositions in which an oil phase is included in the surfactant phase.

In view of the above circumstances, the present invention aims to provide an O/D type composition that contains liquid oil and has excellent stability.

As a result of intensive research, the inventors discovered that by incorporating a dihydric alcohol as a polyhydric alcohol in an O/D type composition containing liquid oil, an O/D type composition with excellent stability can be obtained, which led to the completion of the present invention.

In other words, the O/D type composition of the present invention is a blend of liquid oil, a nonionic surfactant, a dihydric alcohol, and water. This composition has a high viscosity precisely because the D phase (surfactant phase) contains liquid oil. The viscosity of the O/D type composition of the present invention is, for example, 200 Pa or more and 2000 Pa or less.

Since the O/D type composition of the present invention contains a liquid oil as described above, it is preferable to use it by applying it to hair and not rinsing it off. In such a usage mode, the inclusion of a dihydric alcohol improves spreadability on the palm of the hand. In addition, in the same usage mode, the amount of the liquid oil in the O/D type composition of the present invention is preferably 50% by mass or more. In the same usage mode, the O/D type composition of the present invention contains a volatile liquid oil as the liquid oil, and the amount of the volatile liquid oil is preferably 50% by mass or more.

When the O/D type composition of the present invention is used in a form in which it is applied to hair and not rinsed off, it is preferable to blend a polyoxyethylene alkyl ether having an HLB of less than 15.0 and/or a polyoxyethylene alkenyl ether having an HLB of less than 15.0 as the nonionic surfactant. This selection of the nonionic surfactant to be blended is suitable for suppressing stickiness of hair.

In addition, when the O/D type composition according to the present invention is used in a form in which it is applied to hair and not rinsed off, when a polyoxyethylene alkyl ether having an HLB of less than 15.0 and/or a polyoxyethylene alkenyl ether having an HLB of less than 15.0 is blended as the nonionic surfactant, it is preferable to also blend a polyoxyethylene polyoxypropylene alkyl ether having an HLB of 13.0 or more as the nonionic surfactant. If the HLB of the polyoxyethylene polyoxypropylene alkyl ether is 13.0 or more, the spread of the composition when applied to hair is improved while suppressing the decrease in the inhibition of stickiness of hair caused by the polyoxyethylene alkyl ether having an HLB of less than 15.0 and/or the polyoxyethylene alkenyl ether having an HLB of less than 15.0.

The O/D type composition of the present invention has excellent stability because it contains a dihydric alcohol along with liquid oil, a nonionic surfactant, and water.

The present invention will be described below based on the embodiments of the present invention.
The composition according to the present embodiment contains liquid oil, a nonionic surfactant, a dihydric alcohol, and water as essential components (the amount of water is, for example, 1% by mass or more and 10% by mass or less), and optional components are added as necessary. The composition according to the present embodiment is an oil-in-D phase type (O/D type) composition.

An example of the use of the O/D type composition of this embodiment is to apply it to hair as a hair styling product, leave-in treatment, etc., and not rinse it off. When using, the composition of this embodiment may be applied to hair that is wet with water or to dry hair, similar to known hair styling products or leave-in treatments, and then left as is or dried with warm air.

The liquid oil blended in the composition of this embodiment is a known liquid oil that is liquid at 20°C and is insoluble or poorly soluble in water, i.e., it separates into two phases, an oil phase and a water phase, when mixed with water.

Examples of the liquid oil include liquid silicone, liquid hydrocarbon, liquid ester oil, liquid fat (mainly composed of triester of fatty acid and glycerin), and liquid higher alcohol. Examples of the liquid silicone include methyl polysiloxane (e.g., methyl polysiloxane having a viscosity of 10 mm ² /s or more and 100 mm ² /s or less, measured in accordance with the first method of viscosity measurement of the general test method for cosmetic raw materials), and cyclic silicone (e.g., decamethylcyclopentasiloxane). Examples of the liquid hydrocarbon include mineral oil, hydrogenated polyisobutene (light isoparaffin, light liquid isoparaffin, liquid isoparaffin, etc.), and squalane. Examples of the liquid ester oil include esters of linear fatty acids such as isopropyl myristate and lower alcohols, esters of linear fatty acids such as cetyl caprylate and linear higher alcohols, esters of linear fatty acids such as octyldodecyl myristate and branched alcohols, and branched fatty acids such as isopropyl isostearate. and lower alcohols, esters of branched fatty acids such as hexyl isostearate and straight-chain higher alcohols, esters of fatty acids such as propylene glycol di(capryl-caprate) and polyhydric alcohols, esters of branched fatty acids such as isostearyl isostearate and branched alcohols, and alkyl benzoates such as alkyl benzoates (C12-14). Examples of liquid oils and fats include olive oil, rice bran oil, sunflower oil, meadowfoam oil, and rosehip oil. Examples of liquid higher alcohols include isostearyl alcohol and octyldodecanol.

In the composition of this embodiment, one or more liquid oils are blended. The amount of liquid oil blended in the composition of this embodiment is preferably 50% by mass or more, and more preferably 60% by mass or more. If it is 50% by mass or more, it is suitable as an O/D type composition for hair.

The liquid oil to be blended in the composition of this embodiment may be a volatile liquid oil. Due to its volatility, volatile liquid oils tend to provide the same feel to hair as other blended ingredients that do not volatilize.

The above-mentioned volatile liquid oils are, for example, volatile silicones and volatile hydrocarbons. Examples of volatile silicones include linear dimethyl silicones such as octamethyltrisiloxane, decamethyltetrasiloxane, and methylpolysiloxane (low viscosity of about 0.65 to 5 cp); and cyclic silicones such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane. In addition, examples of volatile hydrocarbons include those with a boiling point of 260°C or less at normal pressure, such as mineral oil, hydrogenated polyisobutene (light isoparaffin, light liquid isoparaffin), and isododecane.

The composition of this embodiment may contain one or more volatile liquid oils (for example, volatile silicone, volatile hydrocarbon, or volatile silicone and volatile hydrocarbon). The amount of volatile liquid oil in the composition of this embodiment is preferably 50% by mass or more, more preferably 60% by mass or more, more preferably 70% by mass or more, and even more preferably 80% by mass or more. If the amount of volatile liquid oil is 50% by mass or more, it is easy to obtain the feel imparted to the hair by the other blended ingredients.

The nonionic surfactant blended in the composition of this embodiment is blended to form phase D, and the blended nonionic surfactant may be a known nonionic surfactant, such as polyoxyethylene alkyl ether, polyoxyethylene alkenyl ether, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitol tetra fatty acid ester, glycerin fatty acid ester, alkyl glucoside, sorbitan fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene glycerin fatty acid ester, sucrose fatty acid ester, and alkyl alkanolamide.

One or more of the above nonionic surfactants are blended into the composition of this embodiment. The amount of nonionic surfactant blended in the composition is preferably the amount required to prepare a stable O/D type composition, and is, for example, 0.5% by mass or more. The upper limit of the blended amount is, for example, 10% by mass.

As the nonionic surfactant, it is preferable to blend a POE alkyl ether with an HLB of less than 15.0, a POE alkenyl ether with an HLB of less than 15.0, or a POE alkyl ether with an HLB of less than 15.0 and a POE alkenyl ether with an HLB of less than 15.0 (here, "POE" means "polyoxyethylene"; the same applies below). Blending a POE alkyl ether or a POE alkenyl ether with an HLB of less than 15.0 suppresses the sticky feel of hair that is generally prone to occur in O/D type compositions, compared to those with an HLB of 15.0 or more, and the HLB is preferably less than 13.0, preferably less than 11.0, more preferably less than 10.0, and even more preferably less than 9.0.

The above HLB is synonymous with "hydrophile-lipophile balance value" and is calculated by the following emulsification test: (1) using a parts by mass of a nonionic surfactant for which the HLB is to be determined and b parts by mass of sorbitan monostearate ("NIKKOLSS-10MV" manufactured by Nikko Chemical Co., Ltd., HLB value = 4.7), a number of emulsions are obtained with the following composition and preparation method in which a and b are set at various ratios, and (2) the HLB value is calculated from "(10.5-4.7 x b/4)4/a" based on the ratio of a and b that results in the smallest particle size of oil droplets in these emulsions after standing for one day.
Composition of emulsion:
Liquid paraffin (oil phase) 40% by mass
Emulsifier a + b = 4 mass%
Water 56% by mass
Method for preparing emulsion:
Liquid paraffin is heated to about 80°C, and the aqueous phase above 80°C is emulsified with ether while stirring. After that, the mixture is cooled and left at 40°C while continuing to stir.

Examples of POE alkyl ethers having an HLB of less than 15.0 include POE cetyl ethers such as POE cetyl ether (2 E.O.), POE cetyl ether (8 E.O.), POE cetyl ether (7 E.O.), and POE cetyl ether (10 E.O.); POE stearyl ethers such as POE stearyl ether (2 E.O.) and POE stearyl ether (4 E.O.); POE alkyl (12-1 4) POE alkyl (12-14) ethers such as ether (3 E.O.), POE alkyl (12-14) ether (5 E.O.), POE alkyl (12-14) ether (7 E.O.), POE alkyl (12-14) ether (9 E.O.), and POE alkyl (12-14) ether (12 E.O.) (the number written before "E.O." represents the average number of moles of POE added; the same applies below). Examples of commercially available POE cetyl ethers include "NIKKOL BC-2", "NIKKOL BC-5.5", "NIKKOL BC-7", and "NIKKOL BC-10" manufactured by Nikko Chemical Co., Ltd., examples of commercially available POE stearyl ethers include "NIKKOL BS-2" and "NIKKOL BS-4" manufactured by Nikko Chemical Co., Ltd., and examples of commercially available POE alkyl (12-14) ethers include "NIKKOL BT-3", "NIKKOL BT-5", "NIKKOL BT-7", "NIKKOL BT-9", and "NIKKOL BT-12" manufactured by Nikko Chemical Co., Ltd. Examples of POE alkenyl ethers with an HLB of less than 15.0 include POE oleyl ethers such as POE oleyl ether (2E.O.), POE oleyl ether (7E.O.), and POE oleyl ether (10E.O.), and examples of commercially available POE oleyl ethers include "NIKKOL BO-2V," "NIKKOL BO-7V," and "NIKKOL BO-10V" manufactured by Nikko Chemical Co., Ltd.

It is preferable to blend one or more of the above POE alkyl ethers having an HLB of less than 15.0 and POE alkenyl ethers having an HLB of less than 15.0 into the composition of this embodiment, and the blending amount of the POE alkyl ethers having an HLB of less than 15.0 and POE alkenyl ethers having an HLB of less than 15.0 in the composition of this embodiment is, for example, 0.1% by mass or more and 5.0% by mass or less.

The composition of this embodiment may contain a POE-POP alkyl ether (here, "POE-POP" means "polyoxyethylene polyoxypropylene"; the same applies below). When a POE-POP alkyl ether is contained together with a POE alkyl ether having an HLB of less than 15.0 and/or a POE alkenyl ether having an HLB of less than 15.0, it is preferable to select a POE-POP alkyl ether having an HLB of 13.0 or more. By containing a POE-POP alkyl ether having an HLB of 13.0 or more, the spreadability of the composition when applied to hair is improved while suppressing a decrease in the stickiness of hair. The HLB is preferably 14.0 or more, more preferably 15.0 or more, and the upper limit of the HLB is, for example, 20.0.

Examples of POE-POP alkyl ethers with an HLB of 13.0 or more include POE-POP cetyl ethers such as POE-POP cetyl ether (20 E.O.) (4 P.O.) (the number before "E.O." indicates the average number of moles of POE added, as above, and the number before "P.O." indicates the average number of moles of POP added. The same applies below). Commercially available POE-POP cetyl ethers include "NIKKOL PBC-44" and "NIKKOL SG-C420" manufactured by Nikko Chemical Co., Ltd.

It is preferable to blend one or more of the POE/POP alkyl ethers having an HLB of 13.0 or more in the composition of this embodiment, and the blending amount of the POE/POP alkyl ethers having an HLB of 13.0 or more in the composition of this embodiment is, for example, 0.1% by mass to 5.0% by mass, preferably 0.3% by mass to 3.0% by mass, and preferably 0.5% by mass to 2.0% by mass. From the viewpoint of suppressing the sticky feel of hair and good stretchability, the ratio of the "blended amount of POE/POP alkyl ethers having an HLB of 13.0 or more" to the "blended amount of POE alkyl ethers having an HLB of less than 15.0 and POE alkenyl ethers having an HLB of less than 15.0" is preferably 2.0 or less, more preferably 1.5 or less, and more preferably 1.2 or less.

The dihydric alcohol blended in the composition of this embodiment is a known dihydric alcohol having 4 or less carbon atoms that is blended to prepare a stable O/D type composition. Examples of the dihydric alcohol include 1,2-propanediol (labeled name in cosmetics: PG), 1,3-propanediol (labeled name in cosmetics: propanediol), and 1,3-butylene glycol (labeled name in cosmetics: BG). The blended amount of this dihydric alcohol in this embodiment is, for example, 2% by mass or more and 10% by mass or less.

The optional ingredients to be blended in the composition of this embodiment are appropriately selected from ingredients blended in known hair compositions according to the use and purpose of the composition of this embodiment. Examples of the optional ingredients include cationic surfactants (amount blended, for example, 0.5% by mass or less), cationic polymeric compounds (amount blended, for example, 0.3% by mass or less), organic acids, organic acid salts, non-liquid silicones such as highly polymerized methylpolysiloxanes (amount blended, for example, 0.5% by mass or more and 5% by mass or less), preservatives, fragrances, etc.

The viscosity of the composition of this embodiment is preferably 200 Pa or more and 2000 Pa or less, and more preferably 300 Pa or more and 1000 Pa or less, from the viewpoint of ease of spreading on the palm or the surface of the hair when applied to hair and used in a form in which it is not rinsed off. Here, the above viscosity is the value of G' when the stress is 2.4 Pa, using a stress-controlled rheometer (for example, "Rheo Stress 6000" manufactured by HAAKE) with a measurement temperature of 25°C, a diameter of the cone-plate sensor of 35 mm and an inclination angle of 2°, a waiting time of 1 minute, and measurement mode conditions of stress-dependent dynamic viscoelasticity measurement, stress of 0.1 Pa to 1000 Pa, and frequency: 1 Hz.

To manufacture the composition of this embodiment, it is advisable to employ a known method for manufacturing O/D type compositions. It is possible to obtain an O/D type composition in the middle of a known D phase emulsification method for obtaining an O/W type emulsion, and an O/D type composition is obtained by mixing a D phase containing a nonionic surfactant, a dihydric alcohol, and water with liquid oil.

The pH of the composition of this embodiment at 25°C is, for example, 4 or more and 6 or less.

The present invention will be described in detail below based on examples, etc., but the present invention should not be interpreted in a limited manner based on the description of these examples, etc. O/D type compositions of the examples and comparative examples were produced and these O/D type compositions were evaluated. The details are as follows.

(O/D type composition)
The O/D type compositions of Example 1, Comparative Example, Examples 2a to 2c, and Examples 3a to 3e were each mixed with POE oleyl ether (2 E.O.) having an HLB of 7.5, POE alkyl (C12-14) ether (12 E.O.) having an HLB of 14.5, POE cetyl ether (20 E.O.) having an HLB of 17.0, POE lauryl ether (21 E.O.) having an HLB of 19.0, and POE·POP cetyl ether (22 E.O.) having an HLB of 16.5. It was produced using POE·POP cetyl ether (20 E.O.) (4 P.O.), POE·POP cetyl ether (20 E.O.) (8 P.O.) with an HLB of 12.5, 1,2-propanediol, glycerin, water, methylpolysiloxane, alkyl benzoate (C12-14), decamethylcyclopentasiloxane, highly polymerized methylpolysiloxane, polyquaternium-11, pH adjuster, preservative, and fragrance. The amounts of the components used were as shown in Tables 1 to 3 below (the amount of pH adjuster was an amount to adjust the pH to about 5).

(Stability)
A 100 ml transparent polyethylene terephthalate container filled with any of the O/D type compositions of the Examples and Comparative Examples was sealed and then left for one month in a thermostatic chamber at 50° C. After leaving the container, each O/D type composition was visually observed and compared with the composition before being left for one month at 50° C., and evaluated according to the following criteria.
○: No change in appearance ×: Phase separation or change in turbidity

(Good stretchability)
Evaluators took either the O/D type composition of the Example or Comparative Example, spread it between the palms of both hands, and evaluated the smoothness of spreading. In this evaluation, three evaluators compared Example 3c with the other Examples and Comparative Examples. The evaluation criteria were as follows:
○: Three evaluators rated the smoothness as equal to or greater than that of Example 3c. △: One evaluator rated the smoothness as inferior to that of Example 3c. ×: Two or three evaluators rated the smoothness as inferior to that of Example 3c.

(Prevents stickiness)
An evaluator took either the O/D type composition of the Example or Comparative Example, spread it on the palms of both hands, and then applied a thin layer to the surface of the hair planted on a head mannequin. The sticky feel of the hair after application was evaluated by three evaluators, who compared Example 3c with the other Examples and Comparative Examples. The evaluation criteria were as follows:
◯: Three evaluators rated it as being stickier than Example 3c △: One evaluator rated it as being stickier than Example 3c ×: Two or three evaluators rated it as being stickier than Example 3c

Tables 1 to 3 below show the components and amounts blended in the O/D type compositions of each Example and Comparative Example, as well as the evaluation results.

In Table 1 above, it can be seen that Example 1, which contains a dihydric alcohol (1,2-propanediol), is superior in "stability" and "spreadability" to the comparative example, which contains a trihydric alcohol (glycerin).

In Table 2 above, it can be seen that Example 2a, which contains a POE alkyl ether with an HLB of less than 15.0 (POE alkyl (C12-14) ether (12 E.O.)) and a POE ether with an HLB of less than 15.0 (POE oleyl ether (2 E.O.)), was superior in "suppressing stickiness" to Examples 2b and 2c, which contain POE alkyl ethers with an HLB of 15.0 or more (POE cetyl ether (20 E.O.), POE lauryl ether (21 E.O.)).

In the above Table 3, it can be confirmed that in Examples 3a to 3e which incorporate a POE alkyl ether having an HLB of less than 15.0 (POE alkyl (C12-14) ether (12 E.O.)) or a POE ether having an HLB of less than 15.0 (POE oleyl ether (2 E.O.)), when a POE-POP alkyl ether is also incorporated, Examples 3b to 3d which incorporate a POE-POP alkyl ether having an HLB of 13.0 or more (POE-POP cetyl ether (20 E.O.) (4 P.O.)) are superior in "suppression of stickiness" and "good spreadability" to Comparative Example 3e which incorporates a POE-POP alkyl ether having an HLB of less than 13.0 (POE-POP cetyl ether (20 E.O.) (8 P.O.)).

Claims (6)

It contains liquid oil, a nonionic surfactant, a dihydric alcohol, and water .
The liquid oil is one or more selected from the group consisting of liquid silicone, liquid hydrocarbon, liquid ester oil, liquid oil and fat, and liquid higher alcohol;
The nonionic surfactant is one or more selected from polyoxyethylene alkyl ether, polyoxyethylene alkenyl ether, and polyoxyethylene polyoxypropylene alkyl ether,
As the dihydric alcohol, 1,2-propanediol or 1,3-propanediol is blended,
It is applied to hair and left unwashed.
O/D type composition (however, excluding an O/D type emulsion composition containing glycyrrhetinic acid, comprising an oil agent (a) containing at least one of a higher alcohol and an ester oil; a nonionic surfactant (b); and a polyhydric alcohol (c); wherein the ratio (b)/(a) of the content of the nonionic surfactant (b) to the content of the oil agent (a) is 0.26 to 3.5, the ratio (c)/(b) of the content of the polyhydric alcohol (c) to the content of the nonionic surfactant (b) is 0.75 to 6, and the content of water (d) is 0 to 15 mass %). The O/D type composition according to claim 1, having a viscosity of 200 Pa or more and 2000 Pa or less. 3. The O/D type composition according to claim 1, wherein the blending amount of the liquid oil is 50 mass % or more. The O/D type composition according to any one of claims 1 to 3, wherein a volatile liquid oil is blended as the liquid oil, and the blending amount of the volatile liquid oil is 50 mass% or more. The O/D type composition according to any one of claims 1 to 4 , wherein the nonionic surfactant is a polyoxyethylene alkyl ether having an HLB of less than 15.0 and/or a polyoxyethylene alkenyl ether having an HLB of less than 15.0. The O/D type composition according to claims 1 to 4, wherein the nonionic surfactant is a polyoxyethylene alkyl ether having an HLB of less than 15.0 and/or a polyoxyethylene alkenyl ether having an HLB of less than 15.0, and a polyoxyethylene polyoxypropylene alkyl ether having an HLB of 13.0 or more.