KR102640033B1 - Liquid crystal composition having an effect on reduced amine odor - Google Patents

Abstract

The present invention relates to a liquid crystal emulsion composition that is effective in reducing amine odor. Specifically, a liquid crystal emulsion composition that can suppress amine odor and reduce discoloration through an optimal combination of three or more types of emulsifiers and liquid crystal emulsifiers, and a hair dye composition containing the same. It's about.

Description

Liquid crystal emulsion composition effective in reducing amine odor {Liquid crystal composition having an effect on reduced amine odor}

The present invention relates to a liquid crystal emulsion composition that is effective in reducing amine odor. Specifically, a liquid crystal emulsion composition that can suppress amine odor and reduce discoloration through an optimal combination of three or more types of emulsifiers and liquid crystal emulsifiers, and a hair dye composition containing the same. It's about.

The shape and beautiful color of hair have become an important means of expressing human personality. In particular, as hair dyeing has become a part of style in a modern society that values individuality, the hair dye market is continuously expanding.

In general, oxidation-type hair dyes are most commonly used, which penetrate low-molecular-weight oxidation dyes into the hair and simultaneously cause oxidation polymerization through the action of oxidizing agents. These oxidized hair dyes have the problem of severe irritation due to the amine/ammonia odor generated by the mixing of alkaline agents during treatment.

Accordingly, the present inventors conducted research on a formulation that can suppress amine odor, and as a result, the present invention was completed by developing a liquid crystal emulsion composition with excellent amine odor reduction effect through an appropriate combination of emulsifier and liquid crystal emulsifier. .

KR 10-1626051 B1

The purpose of the present invention is to provide a liquid crystal emulsion composition with excellent amine odor reduction effect, discoloration reduction effect, and formulation stability through an appropriate combination of three or more types of emulsifiers and liquid crystal emulsifiers, and a hair dye composition containing the same.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

According to an embodiment of the present invention, a liquid crystal emulsion composition is provided, comprising three or more types of emulsifiers and a liquid crystal emulsifier.

In addition, the three or more types of emulsifiers may be selected from the group consisting of fatty alcohols, ceteth series, steareth series, cetyl ester, stearate series, and palmitate series emulsifiers.

In addition, the three or more types of emulsifiers include fatty alcohol emulsifiers; At least one emulsifier of the ceteth series or steareth series; and at least one emulsifier selected from the group consisting of cetyl ester, stearate, and palmitate.

According to another embodiment of the present invention, a hair dye composition comprising the liquid crystal emulsion composition is provided.

The composition according to the present invention contains liquid crystal emulsified particles that form a liquid crystal structure, thereby reducing the occurrence of a characteristic amine odor.

In addition, the hair dye composition according to the present invention can minimize discoloration by suppressing oxidation and has excellent formulation stability.

In order to more fully understand the drawings cited in the detailed description of the present invention, a brief description of each drawing is provided.
Figure 1 shows the results of confirming the degree of discoloration of the compositions according to Examples 1 to 2 and Comparative Examples 1 to 3.
Figure 2 shows the results of confirming the degree of discoloration of the compositions according to Examples 3 to 5 and Comparative Examples 4 to 7.
Figure 3 shows the results of confirming the layer separation phenomenon of the compositions according to Comparative Examples 4 and 5 and the fine precipitation of the compositions according to Comparative Examples 6 and 7.
Figure 4 shows the results of observing liquid crystal formation of the compositions according to Examples 1 to 5 and Comparative Examples 1 to 7.

Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. In general, the nomenclature used herein is well known and commonly used in the art. Additionally, when describing embodiments of the present invention, if detailed descriptions of related known configurations or functions are judged to impede understanding of the embodiments of the present invention, the detailed descriptions will be omitted. In addition, embodiments of the present invention will be described below, but the technical idea of the present invention is not limited or limited thereto and may be modified and implemented in various ways by those skilled in the art.

In this specification, when a part includes a certain element, this does not mean excluding other elements, but may further include other elements, unless specifically stated to the contrary. In this specification, the term and/or includes a combination of a plurality of related items or any one item among a plurality of related items.

According to an embodiment of the present invention, a liquid crystal emulsion composition is provided, comprising three or more types of emulsifiers and a liquid crystal emulsifier.

In the present invention, liquid crystal is an intermediate state between a solid and a liquid, and refers to a liquid crystal or meso-phase material that forms a crystal in a relatively regular state. This refers to a system in which organic molecules, which usually have both hydrophilic and lipophilic parts, are arranged in a uniform manner, with the hydrophilic parts being aligned with the hydrophilic parts and the lipophilic parts being arranged with the lipophilic parts, thereby creating a multi-layered lamellar structure. Emulsion means evenly mixing the hydrophilic and lipophilic parts, and liquid crystal emulsified particles mean that the emulsified particles exist in the form of droplets. These liquid crystal emulsified particles have a multi-layered hydrophilic layer and a lipophilic layer, and are capable of encapsulating and stabilizing active ingredients therein.

The composition according to the present invention corresponds to a liquid crystal emulsion composition that can stably form liquid crystal emulsification particles by optimizing the types and mixing ratios of three or more types of emulsifiers and liquid crystal emulsifiers. This liquid crystal emulsion composition can reduce the occurrence of the characteristic amine odor and can be used as a bar hair dye composition that is excellent in reducing discoloration and increasing formulation stability.

According to an embodiment of the present invention, the three or more types of emulsifiers may be selected from the group consisting of fatty alcohols, ceteth series, steareth series, cetyl ester, stearate series, and palmitate series emulsifiers. Specifically, the three or more types of emulsifiers include fatty alcohol emulsifiers; At least one emulsifier of the ceteth series or steareth series; and at least one emulsifier selected from the group consisting of cetyl ester, stearate, and palmitate. A more stable liquid crystal emulsion composition can be formed by mixing these in an optimal ratio.

Specifically, the fatty alcohol emulsifier may include at least one of cetyl alcohol, stearyl alcohol, myristyl alcohol, behenyl alcohol, and cetearyl alcohol. In one embodiment of the present invention, cetyl alcohol was used, but it is not limited thereto. The fatty alcohols are long-chain aliphatic alcohols and have a long chain length, and due to the long chain length, they can serve as a packing that firmly holds droplets, which are emulsified particles in liquid crystals.

The fatty alcohol emulsifier may be included in an amount of 1 to 12% by weight, specifically 1 to 8% by weight, and more specifically 2 to 5% by weight, based on the total weight of the composition. If the fatty alcohol emulsifier is included in less than 1% by weight based on the total weight of the composition, oil separation may occur, and if it is included in more than 12% by weight, precipitation may occur and formulation stability may be reduced. However, it is not limited to this.

The seteth series emulsifiers include seteth-1, seteth-2, seteth-3, seteth-4, seteth-5, seteth-6, seteth-10, seteth-12, seteth- It may include at least one of Seteth-14, Seteth-15, Seteth-16, Seteth-20, Seteth-24, Seteth-25, and Seteth-45. Specifically, two types of emulsifiers among the Ceteth series of emulsifiers may be included, and in one embodiment of the present invention, a mixture of Ceteth-2 and Ceteth-20 was used. The seteth-based emulsifier helps to dissolve well in solvents in which it is generally not soluble, and can play a role in helping to form liquid crystal emulsified particles by reducing the surface tension of emulsified particles. When using a mixture of the above-mentioned ceteth series emulsifiers, particle packing can be further strengthened by using components with different chain lengths.

The steareth-based emulsifiers include Steareth-2, Steareth-3, Steareth-4, Steareth-5, Steareth-6, Steareth-7, Steareth-8, Steareth-10, Steareth- 11, Steareth-13, Steareth-15, Steareth-16, Steareth-20, Steareth-21, Steareth-25, Steareth-30, Steareth-40 and Steareth-100. may include. Specifically, two types of emulsifiers among the steareth-based emulsifiers may be included.

The ceteth-based or steareth-based emulsifier may be included in an amount of 0.1 to 20% by weight, specifically 0.1 to 10% by weight, and more specifically 1 to 8% by weight, based on the total weight of the composition. . If the ceteth-based or steareth-based emulsifier is included in an amount of less than 0.1 weight based on the total weight of the composition, separation of other types of emulsifiers may occur, and if it is included in more than 20% by weight, it may be difficult to maintain the cream formulation. there is. However, it is not limited to this.

The cetyl ester is a synthetic wax and is a substance composed of an ester mixture of a fatty acid with 14 to 18 carbons and an alcohol.

The stearate-based emulsifiers include sorbitan stearate, diglyceryl triisostearate, stearyl stearate, glyceryl stearate, sorbitan diisostearate, polyglyceryl-2 triisostearate, and polyglyceryl-2-triisostearate. It may contain at least one of the three triisostearates.

The palmitate series emulsifiers include sorbitan palmitate, cetyl palmitate, isostearyl palmitate, polyglyceryl-10 palmitate, polyglyceryl-2 palmitate, glyceryl isopalmitate, butylene glycol palmitate. and stearyl palmitate.

The cetyl ester, stearate-based or palmitate-based emulsifier may be included in an amount of 0.1 to 5% by weight, specifically 0.1 to 3% by weight, based on the total weight of the composition. If the cetyl ester, stearate, or palmitate emulsifier is included in an amount of less than 0.1 weight based on the total weight of the composition, oil separation may occur at high temperature, and if it is included in more than 5 weight, stickiness may increase and the feeling of use may not be good. there is. However, it is not limited to this.

In an example, at least one emulsifier selected from the group consisting of cetyl ester, stearate, and palmitate; and at least one emulsifier selected from the group consisting of a seteth series or a steareth series emulsifier; may be mixed at a weight ratio of 1:2 to 9. If the mixing ratio exceeds 1:9, the thickness of the liquid crystal frame is different and the shape is distorted due to the high content of the wax phase, which reduces formulation stability, reduces the effect of suppressing amine odor, and causes discoloration.

In an embodiment, the liquid crystal emulsifier may include at least one of hydrogenated polydecene, squalane, and jojoba oil. The liquid crystal emulsifier is an oil component that is applied together with the wax phase included in the emulsifier to form liquid crystals. The liquid crystal emulsifier may be included in an amount of 0.05 to 6% by weight, specifically, 0.1 to 4% by weight based on the total weight of the composition. If the liquid crystal emulsifier is included in an amount of less than 0.05 weight or more than 6 weight based on the total weight of the composition, liquid crystals that are cloudy and have an inconsistent inner thickness are formed, the effect of suppressing amine odor is reduced, and discoloration occurs. there is.

According to an embodiment of the present invention, a hair dye composition comprising the liquid crystal emulsion composition is provided. Specifically, the liquid crystal emulsion composition of the present invention may be included as the first component of a hair dye. The first agent may include, in addition to the liquid crystal emulsion composition, an alkali agent, a diamine-based compound, a pigment (dye), a fragrance, etc.

According to an embodiment of the present invention, the hair dye composition may include a first agent containing the liquid crystal emulsion composition of the present invention as an oxidation-type hair dye, and a second agent containing an oxidizing agent. The oxidizing agent breaks down the melanin in the hair, brightens the hair's base color, and promotes the oxidation reaction. The oxidizing agent may include hydrogen peroxide.

Depending on the embodiment, the hair dye composition may contain a pH adjuster, thickener, antioxidant, neutralizer, functional additive, stabilizer, vitamin, moisturizer, preservative, protein, anti-fade agent, and chelating agent within the range that does not impair the effect of the present invention. It may further include other active ingredients contained in conventional hair dye compositions, such as preservatives and other additives. The mixing amount of the above ingredients is not particularly limited, and can be easily selected by a person skilled in the art within a range that does not impair the purpose and effect of the present invention.

Below, examples and experimental examples are provided to explain the present invention in more detail, but the present invention is not limited thereto.

[Manufacturing example]

Preparation of Example 1

The present inventors prepared a liquid crystal emulsion composition in which an oil phase was formed by mixing three or more types of emulsifiers and liquid crystal emulsifiers listed in Table 1 below. Specifically, four types of emulsifiers were mixed, including cetyl alcohol, one of fatty alcohols, ceteth-2 and ceteth-20, which are members of the ceteth series, and cetyl ester, and hydrogenated polydecene was used as a liquid crystal emulsifier. used. At this time, cetyl alcohol and ceteth-based emulsifiers form a wax phase, and hydrogenated polydecene forms an oil phase, thereby forming liquid crystals.

More specifically, in water phase A, hydroxyethylcellulose was dispersed in glycerin as a thickener, then water was added, heated to 60°C, and stirred. Afterwards, aqueous phase B was added, heated to 80°C, and stirred. Next, the oil phase was slowly added while stirring the water phase at HOMO 3000 RPM. After the addition was completed, it was stirred at 6000 RPM for 5 minutes and then cooled to 40°C. Finally, the alkaline agent and fragrance were added and stirred to complete the composition of Example 1.

Experimental Example 1. Comparison experiment according to liquid crystal emulsifier content

As shown in Table 2 below, the content of hydrogenated polydecene, a liquid crystal emulsifier, was adjusted to prepare compositions of Examples and Comparative Examples of the composition according to the present invention. The remaining ingredients are the same as Example 1. The unit of ingredient content in Table 2 below is weight%.

The degree of inhibition of amine odor was compared between the Example and Comparative Example compositions. For this purpose, the degree of intoxication was numbered through a blind test on 20 people, and the scores were averaged (scores range from 0 to 5, with higher numbers indicating a higher inhibitory effect). The results are shown in Table 3.

As shown in Table 3, in Examples 1 and 2 where the content of hydrogenated polydecene, which is a liquid crystal emulsifier, was 0.1 or 5%, amine odor caused by mixing of an alkaline agent was effectively suppressed, but the In Comparative Examples 1 to 3 where the content was 0.01%, 7%, or not, it was confirmed that the degree of inhibition of amine odor was minimal.

Next, the compositions of Examples and Comparative Examples were maintained at 25°C for 50 minutes to check the degree of discoloration. The results are shown in Figure 1.

As shown in Figure 1, it was confirmed that Examples 1 and 2 showed almost no discoloration, whereas Comparative Examples 1 to 3 showed severe discoloration due to oxidation.

Therefore, through this experiment, when hydrogenated polydecene, a liquid crystal emulsifier, is included, the effect of suppressing amine odor and discoloration is excellent. In particular, the effect is best expressed when hydrogenated polydecene is included at 0.05 to 6% by weight. It was confirmed that this was the case.

Experimental Example 2. Comparison experiment according to emulsifier mixing ratio

As shown in Table 4 below, the mixing ratio of the ceteth series and cetyl ester used as an emulsifier was adjusted, and the compositions of the examples and comparative examples of the composition according to the present invention were prepared in the same manner as Example 1. At this time, the Ceteth series emulsifier was used by mixing Ceteth 2 and Ceteth 20 in the amounts shown in Table 4. When using a mixed seteth, there is an advantage in that the particle packing can be held more tightly because components with different chain lengths are used. The remaining ingredients are the same as Example 1. The unit of ingredient content in Table 4 below is weight%.

The degree of amine odor inhibition was compared between the compositions of Examples and Comparative Examples in the same manner as in Experimental Example 1. The results are shown in Table 5.

As shown in Table 5, when the emulsifier contains only ceteth series or cetyl ester, or the mixing ratio of cetyl ester:cetyl ester emulsifier is 1:10 or more, the degree of inhibition of amine odor caused by mixing of alkaline agents appears to be low. Confirmed.

Next, the compositions of Examples and Comparative Examples were maintained at 25°C for 50 minutes to check the degree of discoloration. The results are shown in Figure 2.

As shown in Figure 2, it was confirmed that while Examples 3 to 5 showed almost no discoloration, Comparative Examples 4 to 7 showed severe discoloration due to oxidation.

Therefore, through this experiment, when using a mixture of ceteth series and cetyl ester as an emulsifier, the effect of suppressing amine odor and discoloration is excellent. In particular, the mixing ratio of ceteth series and cetyl ester is 1:2 to 1:2. It was confirmed that the effect was most excellent when it was 9.

Experimental Example 3. Formulation stability comparison experiment

After storing the compositions of Examples 1 to 5 and Comparative Examples 1 to 7 prepared in Experimental Examples 1 to 2 at low temperature (5°C), room temperature (25°C), and high temperature (50°C), the formulation stability of each composition was tested. Observation was made and the viscosity of each composition was measured. Viscosity was measured using Brookfield Viscosmeter LVT, spin no. Measurements were made for 1 minute at 4 and spin speeds of 6 rpm.

The results are shown in Tables 6 to 7. In Table 6, ○ means that the formulation is stable, and the unit of viscosity is cP.

As shown in Tables 6 and 7, the compositions of Examples 1 to 5 were stably formed at low, room, and high temperatures, while the compositions of Comparative Examples 1 to 7 showed a drop in viscosity and layer separation at some temperatures. , it was confirmed that formulation instability such as fine precipitation was observed. Specifically, the observation results of the comparative example in which layer separation and fine precipitation occurred are shown in Figure 3. As shown in Figure 3, the compositions of Comparative Examples 4 and 5 showed upper layer separation at high temperature, and fine precipitation was observed in Comparative Examples 6 and 7.

Experimental Example 4. Confirmation of liquid crystal particle formation

To confirm the formation of liquid crystal particles, the compositions of Examples and Comparative Examples were photographed using an OLYMPUS BX53 microscope (eyepiece magnification 10x, objective lens 100x magnification) at room temperature. The results are shown in Figure 4.

As shown in Figure 4a, it was confirmed that the compositions of Examples 1 to 5 formed a large amount of liquid crystals of similar size. However, as shown in Figure 4b, the liquid crystals of the compositions of Comparative Examples 1 to 5 were cloudy and the thickness of the inner phase was small. was not constant. In addition, it was confirmed that the compositions of Comparative Examples 6 to 7 had different thicknesses of the liquid crystal frames and were distorted in shape.

Overall, it is possible to form a liquid crystal emulsification structure through optimal mixing of three or more types of emulsifiers and liquid crystal emulsifiers according to the present invention, thereby producing a composition that is excellent in suppressing amine odor and reducing discoloration, and has excellent formulation stability. It was confirmed that it was possible.

As the specific parts of the present invention have been described in detail above, those skilled in the art will understand that these specific techniques are merely preferred embodiments and do not limit the scope of the present invention. It will be obvious. Accordingly, the actual scope of the present invention will be defined by the appended claims and their equivalents.

Claims (12)

A liquid crystal emulsion composition,
Contains three or more types of emulsifiers and liquid crystal emulsifiers,
The above three or more emulsifiers,
A fatty alcohol emulsifier containing at least one of cetyl alcohol, stearyl alcohol, myristyl alcohol, behenyl alcohol, and cetearyl alcohol;
cetyl ester; and
Contains a ceteth series emulsifier;
A liquid crystal emulsion composition wherein the cetyl ester and the ceteth-based emulsifier are included in a weight ratio of 1:2 to 9. delete delete delete According to claim 1,
The seteth series emulsifiers include seteth-1, seteth-2, seteth-3, seteth-4, seteth-5, seteth-6, seteth-10, seteth-12, seteth- A liquid crystal emulsion composition comprising at least one of 14, Seteth-15, Seteth-16, Seteth-20, Seteth-24, Seteth-25 and Seteth-45. delete delete delete delete According to claim 1,
The liquid crystal emulsifier is a liquid crystal emulsion composition comprising at least one of hydrogenated polydecene, squalane, and jojoba oil. According to claim 1,
The liquid crystal emulsifier is contained in an amount of 0.05 to 6% by weight based on the total weight of the composition. A hair dye composition comprising the liquid crystal emulsion composition of any one of claims 1, 5, and 10 to 11.