JP7740881B2 - Composition and hair treatment method - Google Patents

Description

The present invention relates to compositions such as leave-in treatments suitable for hair treatment, and to hair treatment methods using such compositions.

Compositions applied to hair contain oily ingredients such as hydrocarbons, silicones, ester oils, and fats and oils to improve the feel of the hair. It is well known that surfactants and thickeners are used in these formulations to disperse the oily ingredients within the composition. As examples of known compositions, Patent Document 1 discloses an oil-in-water emulsion containing polyacrylate-13, silicone, and a cationic surfactant (see claim 1, paragraph 0032), and Patent Document 2 discloses a hair treatment agent containing an acrylic acid/alkyl (meth)acrylate copolymer, an alkali agent, a nonionic surfactant, a liquid oily ingredient, and water (see claim 1).

JP 2017-100981 A JP 2013-18735 A

Incidentally, hair compositions containing liquid oily ingredients may contain anionic polymers such as acrylic acid/alkyl (meth)acrylate copolymers to achieve viscoelastic properties suited to the application. On the other hand, in compositions containing oily ingredients and cationic surfactants, the incorporation of such anionic polymers is limited due to their tendency to interact with the cationic surfactant, resulting in insufficient enhancement of the storage modulus, which is a type of viscoelastic property.

In light of the above circumstances, the present invention aims to provide a composition that contains an oily component and a cationic surfactant and yet achieves a high storage modulus, as well as a hair treatment method that uses the composition.

After extensive research, the inventors discovered that by blending a polyhydric alcohol and water with an oily component and a cationic surfactant, and by appropriately setting the blending amounts of these ingredients and using a specified manufacturing method, separation of the oily component can be suppressed and a composition with a high storage modulus under specific measurement conditions can be achieved, leading to the completion of the present invention.

That is, the composition according to the present invention is characterized in that it contains an oily component, a cationic surfactant, a polyhydric alcohol, and water, and has a storage modulus G ₁ ' of 300 Pa or more as measured using a rheometer under the following measurement condition 1.
<Measurement Condition 1>
Measurement method: Stress-dependent measurement Sensor: Cone-plate sensor with a diameter of 35 mm and an inclination angle of 2° Temperature: 25°C
Frequency: 1 Hz
Stress range: 0.1 Pa to 1000 Pa
Stress when measuring storage modulus G ₁ ': 2.4 Pa

The composition according to the present invention is preferably used for applications in which it is applied to hair. In such applications, separation of the oily component is suppressed by the incorporation of the cationic surfactant, polyhydric alcohol, and water, and a composition having a storage modulus G ₁ ' of 300 Pa or more is used. This provides the unique feel of the composition according to the present invention when used, and also provides the hair feel due to the cationic surfactant and the oily component. This hair feel is more noticeable when the composition is applied to hair and used in a leave-in manner.

The composition of the present invention preferably contains 60% or more by mass of the oily component. Even at this blend amount, by appropriately setting the blend amounts of cationic surfactant, polyhydric alcohol, and water, it is possible to create a composition in which the oily component does not separate. Furthermore, the oily component becomes more easily felt on the skin.

The composition of the present invention preferably contains 15% by mass or less of the water, which is suitable for increasing the storage modulus G ₁ ' and also makes it easier to feel the oily component.

The composition of the present invention preferably has a ratio _G2 "/G2' of the loss modulus G2" to the storage modulus _G2 ' measured using a rheometer under the following measurement condition 2, of 0.50 or less. _A ratio _G2 "/ _{G2 '} of 0.50 or less is suitable for improving the smooth feel during use.
<Measurement Condition 2>
Measurement method: Stress-dependent measurement Sensor: Cone-plate sensor with a diameter of 35 mm and an inclination angle of 2° Temperature: 25°C
Frequency: 1 Hz
Stress range: 0.1 Pa to 1000 Pa
Stress when measuring storage modulus G ₂ ' and loss modulus G ₂ ": 100 Pa

The composition of the present invention preferably contains less than 0.5 mass% of one or more selected from anionic polymers and anionic surfactants, or contains no anionic polymers or surfactants at all. This reduces the interaction between the anionic surfactant or anionic polymer and the cationic surfactant, and is suitable for inhibiting separation of the oily component by the cationic surfactant, polyhydric alcohol, and water.

The hair treatment method of the present invention is characterized by using the composition of the present invention.

The composition according to the present invention, which is produced by appropriately blending an oily component, a cationic surfactant, a polyhydric alcohol, and water, can achieve a storage modulus G ₁ ' of 300 Pa or more while suppressing separation of the oily component.

Furthermore, the hair treatment method of the present invention can impart to the hair the feel provided by the oily components and cationic surfactant contained in the composition used.

1 is a graph showing the storage modulus G′ and loss modulus G″ of Examples 1a and 1e.

The present invention will be described below based on the embodiments of the present invention.
The composition according to the present embodiment is characterized by its viscoelastic properties. The composition according to the present embodiment contains an oil component, a cationic surfactant, a polyhydric alcohol, and water, and further contains optional components depending on the intended use.

(Viscoelastic properties)
The composition of this embodiment has a storage modulus G ₁ ', which is one of the viscoelastic properties, of 300 Pa or more, preferably 500 Pa to 5000 Pa, preferably 800 Pa to 4000 Pa, more preferably 1000 Pa to 3000 Pa, even more preferably 1300 Pa to 2500 Pa, and even more preferably 1500 Pa to 2000 Pa. A storage modulus of 300 Pa or more is suitable for suppressing separation of oily components that occurs over time, and a storage modulus of 5000 Pa or less is suitable for providing a soft feel.

The storage modulus G ₁ ' is measured using a rheometer (for example, a stress-controlled rheometer "Rheo Stress 6000" manufactured by HAAKE Corporation) under the following measurement conditions 1.
<Measurement Condition 1>
Measurement method: Stress-dependent measurement Sensor: Cone-plate sensor with a diameter of 35 mm and an inclination angle of 2° Temperature: 25°C
Frequency: 1 Hz
Stress range: 0.1 Pa to 1000 Pa
Stress when measuring storage modulus G ₁ ': 2.4 Pa

The composition of this embodiment preferably has a ratio _G2 "/ _G2 ' of the loss modulus _G2 " to the storage modulus _G2 ' of 0.50 or less, preferably 0.45 or less, more preferably 0.40 or less, even more preferably 0.35 or less, and even more preferably 0.30 or less. For a smooth feel when spreading the composition of this embodiment, it is preferable that the ratio _G2 "/ _G2 ' is 0.50 or less.

The storage modulus G ₂ ′ and loss modulus G ₂ ″ used in calculating the ratio G ₂ ″/G ₂ ′ are measured using a rheometer (e.g., a stress-controlled rheometer “Rheo Stress 6000” manufactured by HAAKE) under measurement condition 2 below.
<Measurement Condition 2>
Measurement method: Stress-dependent measurement Sensor: Cone-plate sensor with a diameter of 35 mm and an inclination angle of 2° Temperature: 25°C
Frequency: 1 Hz
Stress range: 0.1 Pa to 1000 Pa
Stress when measuring storage modulus G ₂ ' and loss modulus G ₂ ": 100 Pa

(Oily ingredients)
The composition of this embodiment contains an oily component for the purpose of improving the feel of the surface of the object to be coated. This oily component is insoluble or poorly soluble in water, and refers to hydrocarbons, silicones, ester oils, and fats and oils, and it is preferable to contain one or more oily components in the composition of this embodiment. From the viewpoint of improving the feel of the oily component, the amount of the oily component in the composition is preferably 60% by mass or more, preferably 75% by mass or more, and more preferably 80% by mass or more. On the other hand, the upper limit of the amount of the oily component is not particularly limited, but is, for example, 95% by mass.

When ease of spreadability is desired for the composition of this embodiment, it is preferable to blend one or more liquid oily components that exhibit fluidity at 25°C as the oily component to be blended into the composition of this embodiment. From the viewpoint of ease of spreadability, the amount of liquid oily component blended in the composition of this embodiment is preferably 60% by mass or more, preferably 75% by mass or more, and more preferably 80% by mass or more. On the other hand, the upper limit of the amount of liquid oily component blended is not particularly limited, but is, for example, 95% by mass.

Depending on the intended use of the composition of this embodiment, it is preferable to incorporate one or more volatile oil components as the oil component into the composition. The amount of volatile oil component in the composition of this embodiment is preferably 60% by mass or more, preferably 75% by mass or more, and more preferably 80% by mass or more, from the viewpoint of suppressing a sticky feeling on applied hair, for example. On the other hand, the upper limit of the amount of volatile oil component is not particularly limited, but is, for example, 95% by mass.

When a hydrocarbon is blended as the oily component, it is preferable to blend one or more types selected from known hydrocarbons. Examples of known hydrocarbons include isododecane, light liquid isoparaffin, liquid isoparaffin, liquid paraffin, and squalane. The amount of hydrocarbon blended in the composition of this embodiment is, for example, 50% by mass or more.

When silicone is used as the oily component, it is preferable to use one or more types of known silicones. Examples of known silicones include dimethyl silicone (methyl polysiloxane, highly polymerized methyl polysiloxane, etc.), methyl phenyl silicone, cyclic silicone (octamethyl cyclotetrasiloxane, decamethyl cyclopentasiloxane, etc.), amino-modified silicone (aminoethyl aminopropyl siloxane-dimethyl siloxane copolymer, aminoethyl aminopropyl methyl siloxane-dimethyl siloxane copolymer, etc.), long-chain alkyl-modified silicone, and dimethiconol. The amount of silicone in the composition of this embodiment is, for example, 50% by mass or more.

When an ester oil is used as the oil-based component, it is preferable to use one or more known ester oils. Examples of known ester oils include esters of straight-chain fatty acids such as cetyl caprylate and monovalent straight-chain alcohols, esters of straight-chain fatty acids such as 2-octyldodecyl myristate and monovalent branched alcohols, esters of branched fatty acids such as stearyl 2-ethylhexanoate and monovalent straight-chain alcohols, esters of branched fatty acids such as 2-ethylhexyl isononanoate and monovalent branched alcohols, esters of straight-chain or branched fatty acids and polyhydric alcohols such as glyceryl tri(caprylate-caprate), and benzoate esters such as alkyl benzoate (C12-15). The amount of ester oil in the composition of this embodiment is, for example, 5% by mass or more.

When oils and fats (mainly consisting of triesters of fatty acids and glycerin) are used as the oily component, it is preferable to use one or more types selected from known oils and fats. Examples of known oils and fats include avocado oil, almond oil, argania spinosa kernel oil, olive oil, kukui nut oil, rice bran oil, corn oil, safflower oil, shea butter, shea butter oil, baobab seed oil, persic oil, palm kernel oil, sunflower oil, grape seed oil, hazelnut oil, macadamia nut oil, meadowfoam oil, and rosehip oil. The amount of oils and fats in the composition of this embodiment is, for example, 5% by mass or more.

(cationic surfactant)
A cationic surfactant is blended into the composition of this embodiment for the purposes of realizing the storage modulus G ₁ ' and improving the feel of the surface of the object to be coated.

The cationic surfactant to be blended in the composition of this embodiment is one or more selected from known cationic surfactants, and examples of such cationic surfactants include amidoamines (fatty acid amidoamines, etc.) and alkyl quaternary ammonium salts (long-chain alkyl trimethyl ammonium salts, di-long-chain alkyl dimethyl ammonium salts, etc.). When increasing the storage modulus _G1 ' or prolonging the suppression of separation of oily components, suitable cationic surfactants are, for example, fatty acid amido amines and long-chain alkyl trimethyl ammonium salts, and fatty acid amido amine salts are particularly suitable.

Examples of the fatty acid amidoamine include fatty acid amidoamines represented by the following general formula (1).
R ¹ -CO-NH-(CH) _n -NR ² R ³ (1)
[In the above general formula (1), R ¹ , s, R ² , and R ³ are as follows: R ¹ represents a hydrocarbon group or a hydroxyhydrocarbon group having 11 to 25 carbon atoms (which may be 15 to 21 carbon atoms). This R ¹ is saturated or unsaturated, and is linear or branched. n represents an integer of 1 to 4 (which may be 2 to 3). R ² represents an alkyl group or a hydroxyalkyl group having 3 or fewer carbon atoms (which may be 2 or fewer carbon atoms). This R ² is linear or branched. R ³ represents an alkyl group or a hydroxyalkyl group having 3 or fewer carbon atoms (which may be 2 or fewer carbon atoms). This R ³ is linear or branched.]

Specific examples of fatty acid amidoamines represented by the above general formula (1) include lauric acid dimethylaminopropylamide, myristic acid dimethylaminopropylamide, palmitic acid dimethylaminopropylamide, stearic acid dimethylaminopropylamide, behenic acid dimethylaminopropylamide, oleic acid dimethylaminopropylamide, isostearic acid dimethylaminopropylamide, lauric acid diethylaminoethylamide, myristic acid diethylaminoethylamide, palmitic acid diethylaminoethylamide, stearic acid diethylaminoethylamide, behenic acid diethylaminoethylamide, oleic acid diethylaminoethylamide, lauric acid diethylaminopropylamide, myristic acid diethylaminopropylamide, palmitic acid diethylaminopropylamide, stearic acid diethylaminopropylamide, behenic acid diethylaminopropylamide, and oleic acid diethylaminopropylamide.

Examples of the long-chain alkyltrimethylammonium salt include lauryltrimethylammonium chloride, cetyltrimethylammonium bromide, stearyltrimethylammonium chloride, stearyltrimethylammonium bromide, behenyltrimethylammonium chloride, and behenyltrimethylammonium methosulfate.

Examples of the di-long-chain alkyl dimethyl ammonium include dicetyl dimethyl ammonium chloride, distearyl dimethyl ammonium chloride, dicocoyl dimethyl ammonium chloride, and dialkyl (C12-18) dimethyl ammonium chloride.

The amount of cationic surfactant in the composition of this embodiment is preferably 0.5% by mass or more, more preferably 0.7% by mass or more, and even more preferably 1% by mass or more, when the storage modulus _G1 ' is to be increased or when the inhibition of separation of oily components is to be prolonged. Furthermore, when the ratio _G2 "/ _G2 ' is to be set low or when irritation to the scalp is to be suppressed, this amount is preferably 6% by mass or less, more preferably 4% by mass or less, more preferably 3% by mass or less, and even more preferably 2% by mass or less.

(Polyhydric alcohol)
The composition of this embodiment contains a polyhydric alcohol for the purposes of achieving the above storage modulus G ₁ ' and improving the feel of the surface of the object to be coated.

The polyhydric alcohol blended in the composition of this embodiment is a dihydric, trihydric, or tetrahydric alcohol having 6 or fewer carbon atoms, and examples of such polyhydric alcohols include glycerin, 1,2-propanediol, 1,3-propanediol, 2-methyl-1,3-propanediol, 1,3-butylene glycol, diethylene glycol, dipropylene glycol, diglycerin, and triethylene glycol, and one or more polyhydric alcohols are blended in the composition of this embodiment. When increasing the storage modulus G ₁ ' or when prolonging the suppression of separation of oily components, suitable polyhydric alcohols are, for example, glycerin, 1,2-propanediol, and 1,3-propanediol, and glycerin is particularly suitable.

The amount of polyhydric alcohol in the composition of this embodiment is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, and more preferably 1.5% by mass or more, when the storage modulus _G1 ' is to be increased or when the separation of oily components is to be inhibited for a long period of time. Furthermore, when the ratio _G2 "/ _G2 ' is to be set low, the amount is preferably 5% by mass or less, more preferably 4% by mass or less, and more preferably 3% by mass or less.

(water)
In the composition of this embodiment, water is blended to suppress separation of the oily components during production and over time. In the composition of this embodiment, the blending amount of water is preferably 1% by mass or more and 15% by mass or less, preferably 2% by mass or more and 10% by mass or less, and more preferably 3% by mass or more and 8% by mass or less. When the blending amount of water is 1% by mass or more, it is suitable for suppressing separation of the oily components, and when the blending amount of water is 15% by mass or less, it is suitable for increasing the storage modulus G'.

(optional ingredient)
The composition of the present embodiment may optionally contain components that are contained in known hair compositions, such as surfactants other than cationic surfactants, sugars, monohydric alcohols, higher alcohols, fatty acids, polymeric compounds, amino acids, animal and plant extracts, fragrances, preservatives, sequestering agents, and ultraviolet absorbers.

When the composition of this embodiment contains one or more anionic polymers (such as acrylic acid-alkyl (meth)acrylate copolymers and carboxyvinyl polymers) and anionic polymers as optional components, the amount of the anionic polymers added is preferably less than 0.5% by mass, more preferably less than 0.2% by mass, more preferably less than 0.1% by mass, even more preferably less than 0.05% by mass, and even more preferably less than 0.01% by mass (optimally, neither anionic polymers nor anionic surfactants are added as optional components). When the amount of the anionic polymer and anionic surfactant added is less than 0.5% by mass, it is possible to reduce interactions with cationic surfactants that are inappropriate for inhibiting separation of oily components in the composition of this embodiment, and it is also suitable for setting the ratio _G2 "/ _G2 ' low.

(pH)
The pH of the composition of the present embodiment is preferably 4 or more and 8 or less, more preferably 4 or more and 7 or less, from the viewpoint of imparting a good feel to hair with the cationic surfactant.

(Manufacturing method)
In the production of the composition of this embodiment, the oil component is added to a mixture of a cationic surfactant, a polyhydric alcohol, and water. By adopting this production method, it is possible to set the storage modulus G ₁ ' to 300 Pa or more.

(Application)
The composition of the present embodiment contains a cationic surfactant and an oily component known as components for repairing hair and improving its feel, and is therefore suitable for use in applications where the composition is applied to hair. In particular, when used in a leave-in form, the composition is suitable for use by applying it to wet or dry hair and allowing it to dry naturally or with hot air.

The present invention will be described in detail below based on examples, but the present invention should not be construed as being limited by the descriptions in these examples.

Compositions of the examples and comparative examples were prepared. These compositions were prepared using a 60% by weight blend of dimethylaminopropylamide stearic acid and palmitic acid amidopropyltrimethylammonium chloride ("VARISOFT PATC" manufactured by Evonik Operations), a 28% by weight blend of stearyltrimethylammonium chloride ("Cortamine 86W" manufactured by Kao Corporation), a 28% by weight blend of stearyltrimethylammonium chloride ("MICONIUM STAC80(I)" manufactured by Miwon), a 70% by weight blend of stearyltrimethylammonium chloride ("Catinal STC-70ET" manufactured by Toho Chemical Industry Co., Ltd.), and an 80% by weight blend of behenyltrimethylammonium salt ("BTMS" manufactured by KCL). P8580KC"), 75% by weight of dialkyl (C12-C18) dimethylammonium chloride (Kao Corporation's "Cotamine D-2345P"), 80% by weight of di-coconut oil fatty acid ethyl hydroxyethyl methyl ammonium salt (BASF Corporation's "DEHYQUART L80"), 1,2-propanediol, 1,3-butylene glycol, glycerin, 1,3-butylene glycol, 2-methyl-1,3-propanediol, dipropylene glycol, carboxyvinyl polymer "Carbopol Ultrez 10" (Lubrizol Corporation), The ingredients used were a 2.5% by mass aqueous solution of "H.C. Polymer," 2-amino-2-methyl-1-propanol, a 20% by mass blend of Polyquaternium-11 ("H.C. Polymer 2" manufactured by Osaka Organic Chemical Industry Co., Ltd.), alkyl benzoate (C12 to C15), meadowfoam oil, a mixture of highly polymerized methylpolysiloxane and isododecane ("Silsoft B3020" manufactured by Momentive Performance Materials Japan), a mixture of highly polymerized methylpolysiloxane and decamethylcyclopentasiloxane ("XF49-A3818" manufactured by Momentive Performance Materials Japan), isododecane, decamethylcyclopentasiloxane, decamethyltetrasiloxane, PEG-9 dimethicone, phenoxyethanol, methyl parahydroxybenzoate, ethyl parahydroxybenzoate, lactic acid, fragrance, and water, in the amounts shown in Tables 1a, 2 to 6 below. The compositions of the examples and comparative examples were produced by mixing the components in group (A) shown in Tables 1a and 2 to 6 below, then adding and mixing the components in group (B), and then adding and mixing the components in group (C).

After production, each composition was visually inspected, and separation of the oily components was observed in all of the comparative compositions. On the other hand, separation of the oily components was not observed in any of the example compositions.

For all example compositions in which no separation of oily components was observed after production, the compositions were filled into glass containers, sealed, and left at 50°C, after which the appearance was visually inspected (see the table below for the storage period).

Furthermore, the storage modulus G' and loss modulus G" of some of the compositions of the examples were measured. For this measurement, a stress-controlled rheometer "Rheo Stress 6000" manufactured by HAAKE Corporation was used, and the measurement conditions were as follows:
Measurement method: Stress-dependent measurement Sensor: Cone-plate sensor with a diameter of 35 mm and an inclination angle of 2° Temperature: 25°C
Frequency: 1 Hz
Stress range: 0.1 Pa to 1000 Pa

Tables 1a and 2 to 6 below show the components and their amounts used in producing the compositions of the examples and comparative examples, the storage modulus G ₁ ' at a measured stress of 2.4 Pa, and the visual inspection results for "appearance." Tables 1b to 1c below show the storage modulus G', loss modulus G", and the ratio G"/G' of loss modulus G" to storage modulus G' for Examples 1a and 1e (Figure 1 is a graph based on these values). Note that "○", "△", and "×" in "appearance" in each table have the following meanings.
○: Separation of oily components was not observed.
Δ: Slight separation of oily components was observed.
×: Separation of oily components was observed.

Claims (5)

a liquid oil component that is fluid at 25°C ;
cationic surfactants,
a polyhydric alcohol , which is a dihydric, trihydric, or tetrahydric alcohol having 6 or less carbon atoms , and water,
The blending amount of the oily component is 60% by mass or more and 95% by mass or less,
the blending amount of the polyhydric alcohol is 0.5% by mass or more and 5% by mass or less,
The blending amount of the water is 1% by mass or more and 15% by mass or less,
A composition characterized in that the storage modulus G ₁ ' measured using a rheometer under the following measurement condition 1 is 300 Pa or more, and the composition is used in a manner that the composition is applied to hair and not rinsed off .
<Measurement Condition 1>
Measurement method: Stress-dependent measurement Sensor: Cone-plate sensor with a diameter of 35 mm and an inclination angle of 2° Temperature: 25°C
Frequency: 1 Hz
Stress range: 0.1 Pa to 1000 Pa
Stress when measuring storage modulus G ₁ ': 2.4 Pa the cationic surfactant is a fatty acid amidoamine, a long-chain alkyl trimethyl ammonium salt, or a di-long-chain alkyl dimethyl ammonium salt;
The content of the cationic surfactant is 0.5% by mass or more and 6% by mass or less.
The composition of claim 1. 3. The composition according to claim 1, wherein the ratio G2"/G2' of the loss modulus G2" to the storage modulus G2' measured using a rheometer under the following measurement condition 2 _{is 0.50 or less} .
<Measurement Condition 2>
Measurement method: Stress-dependent measurement Sensor: Cone-plate sensor with a diameter of 35 mm and an inclination angle of 2° Temperature: 25°C
Frequency: 1 Hz
Stress range: 0.1 Pa to 1000 Pa
Stress when measuring storage modulus G ₂ ' and loss modulus G ₂ ": 100 Pa
The composition according to any one of claims 1 to 3 , wherein one or more selected from anionic polymers and anionic surfactants are blended in an amount of less than 0.5 mass % or are not blended at all. A method for treating hair, comprising using a composition according to any one of claims 1 to 4 .