JP-2026075485-A - Method for producing an emulsified composition

Abstract

[Problem] To provide a method for producing an emulsifying composition that can further reduce energy consumption. [Solution] A method for producing an emulsified composition, comprising the steps of: preparing an oil phase containing (A) a cationic surfactant, a nonionic surfactant that is solid at 25°C, a nonionic surfactant that is semi-solid at 25°C, or an anionic surfactant; (B) a higher alcohol that is solid at 25°C; and (C) a hydrocarbon compound other than (A) that is liquid at 25°C and has at least one of an alcoholic hydroxyl group, a carboxyl group, an ether bond, or an ester bond; preparing an aqueous phase; and adding the oil phase obtained in the step of preparing the oil phase to the aqueous phase at 65°C or lower, and mixing the oil phase and the aqueous phase. [Selection Diagram] None

Inventors

• 松本 洋平

Assignees

• 株式会社ミルボン

Dates

Publication Date

20260508

Application Date

20241022

Claims (7)

1. (A) A cationic surfactant, a nonionic surfactant that is solid at 25°C, a nonionic surfactant that is semi-solid at 25°C, or an anionic surfactant, (B) A higher alcohol that is solid at 25°C, (C) A step of preparing an oil phase containing a hydrocarbon compound other than the compound in (A) above, which is liquid at 25°C and has at least one of an alcoholic hydroxyl group, a carboxyl group, an ether bond, or an ester bond. The process of preparing the aqueous phase, The oil phase obtained in the step of preparing the oil phase is added to the aqueous phase at a temperature of 65°C or lower, and the oil phase and the aqueous phase are mixed. A method for producing an emulsified composition containing [the specified element].
2. The temperature of the aqueous phase into which the oil phase is added is 50°C or lower. A method for producing the emulsified composition according to claim 1.
3. The hydrocarbon compound in (C) is at least one hydrocarbon compound selected from the group consisting of polyhydric alcohols, ester oils, higher monoalcohols, and nonionic surfactants. A method for producing the emulsified composition according to claim 1 or claim 2.
4. In the oil phase, the proportion of (C) to the sum of (A), (B), and (C) is 20% by mass or more. A method for producing the emulsified composition according to claim 1 or claim 2.
5. The step of preparing the oil phase includes heating and stirring at 50°C or higher. In the step of mixing the oil phase and the aqueous phase, the temperature of the oil phase added to the aqueous phase is higher than the temperature of the aqueous phase. A method for producing the emulsified composition according to claim 1 or claim 2.
6. The endothermic peak temperature of the oil phase is 30°C or higher and 68°C or lower. A method for producing the emulsified composition according to claim 1 or claim 2.
7. The above (A) is a cationic surfactant, The above (B) is at least one selected from cetanol, stearyl alcohol, and behenyl alcohol. A method for producing the emulsified composition according to claim 6.

Description

This invention relates to a method for producing an emulsified composition. Hair cosmetics such as rinses and conditioners are known to exist in the form of emulsified compositions in which an oil phase and an aqueous phase are emulsified. As a method for producing this type of emulsified composition, for example, Patent Document 1 discloses a method for producing an emulsified composition comprising the steps of: mixing an oil phase and an aqueous phase and emulsifying them to obtain an emulsified composition; and cooling the obtained emulsified composition within a predetermined temperature range and then mixing it with an aromatic alcohol. Patent Document 2 discloses a method for producing an emulsified composition, which includes a high-pressure emulsification step in which an oil phase containing oil and an aqueous phase containing an amphoteric surfactant and water are emulsified using a high-pressure emulsifier. The method for producing an emulsified composition described in Patent Document 2 states that by performing emulsification under a pressure of 0.5 MPa to 120 MPa using a high-pressure homogenizer or the like, an emulsified composition with good emulsification stability can be obtained. Japanese Patent Publication No. 2014-114223Japanese Patent Publication No. 2017-19753 The method for producing the emulsified composition according to this disclosure is a method of emulsifying an oil phase containing (A) a cationic surfactant, a nonionic surfactant that is solid at 25°C, a nonionic surfactant that is semi-solid at 25°C, or an anionic surfactant, (B) a higher alcohol that is solid at 25°C, and (C) a hydrocarbon compound other than (A) that is liquid at 25°C and has at least one of an alcoholic hydroxyl group, a carboxyl group, an ether bond, or an ester bond, by mixing it with an aqueous phase. The production method according to this disclosure includes the step of adding the oil phase to the aqueous phase at 65°C or lower and mixing the oil phase and the aqueous phase. The oil phase prepared by the manufacturing method according to this disclosure contains components (A) to (C) above. By combining components (A), (B), and (C), it becomes possible to prepare the oil phase at a lower temperature, thereby reducing the thermal energy required for oil phase preparation. Furthermore, when the oil phase containing components (A) to (C) above is added to the aqueous phase, it is easily emulsified by stirring, and heating of the aqueous phase is not essential in the emulsification process. Therefore, the thermal energy required for the emulsification process is also reduced. This reduction enables a shortening of the manufacturing process time, for example, by shortening the heating time when the heating temperature of the emulsification apparatus is set to a constant value, and by shortening the cooling time due to the ability to lower the heating temperature required for emulsification. [Specific examples of embodiments] The manufacturing method relating to this disclosure will be described in more detail below. In this specification, unless otherwise specified, "A to B" representing a numerical range means "A or more and B or less," and "room temperature" means 25°C. [Oil phase] (Component A) In the manufacturing method according to this disclosure, component (A) incorporated into the oil phase is a cationic surfactant, a nonionic surfactant that is solid at room temperature (25°C; similarly, room temperature means 25°C), a nonionic surfactant that is semi-solid at room temperature, or an anionic surfactant. The cationic surfactant of component (A) is not particularly limited as long as the effects according to this disclosure are obtained, but cationic surfactants incorporated into hair cosmetics are preferably used. Such cationic surfactants may be cationic surfactants having a hydrocarbon group with 8 to 24 carbon atoms, and examples include fatty acid ester amine salts, fatty acid amidoamine salts, urea condensed amine salt type tertiary amine salts (Arcover type tertiary amine salts), long-chain alkyltrimethylammonium salts (e.g., stearyltrimethylammonium salt), di-long-chain alkyldimethylammonium salts, tri-long-chain alkylmonomethylammonium salts, benzalkonium type quaternary ammonium salts, monoalkyl ether type quaternary ammonium salts, etc. (Note that the above "long-chain alkyl" may be an alkyl group having 12 to 22 carbon atoms). The formula may contain one type of cationic surfactant, or it may contain two or more types of cationic surfactants. (A) When a long-chain alkyltrimethylammonium salt is included as component, examples of such ammonium salts include lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, cetyltrimethylammonium bromide, stearyltrimethylammonium chloride, stearyltrimethylammonium bromide, behenyltrimethylammonium chloride, and behenyltrimethylammonium methosulfate. One long-chain alkyltrimethylammonium salt may be included, or two or more cationic surf