KR102377574B1 - Cationic surfactant and personal care composition comprising same - Google Patents

Abstract

The cationic surfactant of the present invention is characterized in that an oil extracted from a natural material is used as a starting material, and the cationic surfactant prepared in this way is hair or body lotion, body cleanser, such as hair shampoo, hair conditioner, hair conditioner, hair treatment, etc. It can be very usefully used for cleaning the skin or in product groups that come in direct contact with the human body.

Description

Cationic surfactant and personal care composition comprising same

The present invention relates to a cationic surfactant obtained by reacting an unsaturated fatty acid and a personal care composition containing the same.

Conventionally, monoalkyl cation compounds such as BTAC (Behenyl trimethyl ammonium chloride), CTAC (Cetyl trimethyl ammonium chloride), and STAC (Stearyl trimethyl ammonium chloride) Although widely used as representative cationic surfactants, they have a problem of poor biodegradability, and CTAC, STAC, etc. are gradually converted to BTAC with a long alkyl chain due to poor flexibility for hair. However, as the starting material of BTAC, behenyl fatty acid has a problem that the amount produced in nature is limited and the price is high.

On the other hand, technologies for synthesizing cationic surfactants using triglyceride-type oil, not fatty acids, as a direct starting material are commercialized in the fabric softener industry. After being patented (US Patent No. 5,869,716), commercialization began only in the mid-2000s in Korea. Korean Patent No. 10-0757049 and Korean Patent No. 10-0861699 disclose a method for synthesizing a cationic surfactant for direct transesterification of vegetable oil. This is limited to fabric softeners, and there is no case of using triglyceride oil directly in cationic surfactants for hair products. The invention has no precedent.

Republic of Korea Patent Registration No. 10-0757049 (September 03, 2007) Republic of Korea Patent Registration No. 10-0861699 (September 29, 2008)

When applied to products, conventional cationic surfactants such as BTAC, STAC, and CATC cause problems in the environment due to low biodegradability of the product or are uneconomical due to their high price. The present invention aims to solve the above problems and provide a cationic surfactant having excellent efficacy in a more economical way.

The present invention relates to a cationic surfactant and a personal care composition comprising the same.

One aspect of the present invention relates to a cationic surfactant of Formula 1 below, characterized in that it is prepared by reacting an esteramine obtained by performing an ester reaction of an unsaturated fatty acid with an amine with a quaternizing agent.

[Formula 1]

(In Formula 1, R ₁ and R ₂ are each independently CH ₃ , (CH ₂ ) ₂ OH, (CH ₂ ) ₂ OCOR ₃ ;

R ₃ is a (C8-C22)alkyl or (C8-C22)alkenyl group;

A is CH ₂ CH ₂ or CH ₂ CH ₂ CH ₂ ;

X is halogen, CH ₃ SO ₄ or CH ₃ CH ₂ SO ₄ )

In the present invention, the amine is any one or a plurality selected from dimethylethanolamine, methyldiethanolamine and triethanolamine, and the quaternizing agent is any one or a plurality selected from dimethylsulfate, diethylsulfate and methyl chloride, respectively do it with

In addition, the unsaturated fatty acid is characterized in that it contains one or more selected from eicosapentaenoic acid, docosahexaenoic acid and docosapentaenoic acid in an amount of 1 wt% or more based on 100 wt% of the total fatty acid ratio.

Another aspect of the present invention relates to a personal care composition comprising the cationic surfactant derived from a natural material.

The cationic surfactant of the present invention is characterized in that an oil extracted from a natural material is used as a starting material, and the cationic surfactant prepared in this way is hair or body lotion, body cleanser, such as hair shampoo, hair conditioner, hair conditioner, hair treatment, etc. It can be very usefully used for cleaning the skin or in product groups that come in direct contact with the human body.

Hereinafter, the cationic surfactant according to the present invention and a personal care composition comprising the same will be described in more detail through specific examples. The embodiments introduced below are provided as examples so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art.

Therefore, the present invention is not limited to the embodiments presented below and may be embodied in other forms, and the embodiments presented below are only described to clarify the spirit of the present invention, and the present invention is not limited thereto.

At this time, unless there are other definitions in the technical terms and scientific terms used, it has a meaning commonly understood by a person of ordinary skill in the art to which this invention belongs, and in the following description, it may unnecessarily obscure the subject matter of the present invention. A description of possible known functions and configurations will be omitted.

Also, the singular forms used in the specification and appended claims may also be intended to include the plural forms unless the context specifically dictates otherwise.

In addition, in describing the components of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but another component is formed between each component. It should be understood that elements may also be “connected,” “coupled,” or “connected.”

In the present invention, the personal care refers to general skin-contact products that can be used by individuals, such as basic cosmetics, color cosmetics, sunscreen, shampoo, detergent, and toothpaste, which are used by consumers all over the world in their daily life. It refers to products used on the human body to clean or beautify the skin and to maintain or promote the health of the skin or hair. Specifically, it is a concept that includes all products included in the enforcement regulations of the Cosmetics Act set by the Ministry of Health and Welfare ( http:// terms.naver.com/entry.nhn?docId=1155234&cid=40942&categoryId=32161 ).

In the present invention, the term 'hair conditioner' is a kind of hair styling product used to strengthen hair after shampooing, and is also called 'conditioner'.

In general, the cationic surfactant means that an atomic group exhibiting surfactant activity by dissociation when the surfactant is dissolved in water has a positive charge. Cationic surfactant is used as a softening agent, antistatic agent, etc. because it is well adsorbed on negatively charged fibers in water and exhibits flexibility, antistatic properties, and water repellency of the fibers. In general, since bacteria have a negative charge, cationic surfactants strongly adsorb bacteria and eliminate their active function, so they are often used for sterilization and disinfection purposes.

In the development of cationic surfactants, structural orientation of alkyl groups in aqueous solution and studies on physical properties thereof have been conducted for a long time. In particular, the stability and softness of the emulsified product depend on the ratio of cis/trans of the unsaturated bond in the alkyl chain of the cationic surfactant, and there was an invention that the stability and softness were the highest when the trans content was 10% or more. Inventions such as the invention that the ratio of cis/trans in the alkyl chain of surfactants affect the degree of biodegradation.

The inventors of the present invention found that the unsaturated bond position of fatty acids affects physical properties such as hair softness, combability, antistatic properties, and skin moisturizing properties, and has good synergy with polyquaternium cationic polymers in cleaning compositions such as body cleansing or It was found that it provides a substitute for smoothness, and among them, omega-3 fatty acids having an alkyl group of 20 or more carbon atoms were found to be the most effective.

In the meantime, fatty acids with 20 or more carbon chains among omega-3 fatty acids have been known to be obtained only from aquatic products including blue-green fish in nature, but have recently been found in plant-derived oils including pine root oil. Inventions are being made for mass production.

Omega-3 fatty acids have a curved end rather than a straight one, giving a smooth feeling of use, and unsaturated bonds in the molecule have better affinity with moisture in the air compared to the saturated bond structure, so they have an effect of preventing static electricity and structurally The present invention was completed by discovering that the shape stability is good and has the effect of continuously giving a smooth feeling of use to the user.

The present invention uses natural oil containing omega-3 fatty acids, such as plants or fish, or oil containing omega-3 fatty acids mass-produced through microorganisms, and esteramines obtained by esterification with amines 4 It relates to a cationic surfactant of the following formula (1), characterized in that it is prepared by reacting with an accelerating agent.

[Formula 1]

(In Formula 1, R ₁ and R ₂ are each independently CH ₃ , (CH ₂ ) ₂ OH, (CH ₂ ) ₂ OCOR ₃ ;

R ₃ is a (C8-C22)alkyl or (C8-C22)alkenyl group;

A is CH ₂ CH ₂ or CH ₂ CH ₂ CH ₂ ;

X is halogen, CH ₃ SO ₄ or CH ₃ CH ₂ SO ₄ )

In the present invention, the oil contains EPA (eicosapentaenoic acid), DHA (docosahexaenoic acid), and DPA (docosapentaenoic acid) having 20 or more carbon atoms among omega-3 fatty acids in 1% or more of the oil composition. and, preferably, it is characterized in that it necessarily contains 5% or more of oil. In addition, the amine is one or more selected from dimethylethanolamine, methyldiethanolamine, and triethanolamine, and the quaternizing agent is any one or more selected from dimethylsulfate, diethylsulfate and methyl chloride, respectively.

The method for synthesizing a cationic surfactant according to the present invention is first, using a natural oil containing omega-3 fatty acids, such as plants or fish, or using an oil containing omega-3 fatty acids mass-produced through microorganisms. A transester reaction with an amine is carried out, and in a second step, a quaternization process is performed using a quaternization agent such as dimethyl sulfate, diethyl sulfate, and methyl chloride.

The unsaturated fatty acid oil may be extracted from blue-green fish, but in consideration of environmental problems and economic feasibility, oil can be extracted from perilla, walnut, flaxseed, pine root oil, etc., and the scope of the present invention includes unsaturated fatty acids having 20 or more carbon atoms in addition to these animals and plants. It may contain unsaturated fatty acid oils collected from all animals and plants that do In addition, mass-produced omega-3 fatty acid products using microorganisms that have been actively studied recently may be included.

In the present invention, the omega-3 fatty acid may include fatty acids represented by the following Chemical Formulas 2 to 4 in more detail.

[Formula 2]

[Formula 3]

[Formula 4]

Formulas 2 to 4 are unsaturated fatty acids having five or more double bonds as described above, and have a structurally curved shape, giving a smooth feeling when added to cosmetics, and may have an antistatic effect and a moisturizing effect.

In the present invention, the unsaturated fatty acid is 1% by weight or more, more preferably 5% by weight or more, and most preferably 5% by weight or more of any one or a plurality of unsaturated fatty acids having 20 or more carbon atoms as in Chemical Formulas 2 to 4, based on 100% by weight of the total. to 30% by weight. At this time, when less than 1% by weight is added, the feeling of use of the final product is deteriorated and the antistatic effect does not appear.

The unsaturated fatty acid oil as described above undergoes an esterification reaction with an amine. At this time, the amine is not limited to the type as long as it can be prepared as a cationic surfactant by performing an esterification reaction with the unsaturated fatty acid oil, but any one or a plurality selected from dimethylethanolamine, methyldiethanolamine and triethanolamine may be used. and, preferably, dimethylethanolamine represented by the following Chemical Formula 5.

[Formula 5]

In the present invention, the amine may be subjected to an esterification reaction with an unsaturated fatty acid oil, and a method of reacting the unsaturated fatty acid oil with an amine without a solvent may be used for the esterification reaction, and specifically, a reaction at 160 to 200° C. It can proceed at temperature for 2 to 8 hours.

In the reaction, the content of the unsaturated fatty acid oil and the amine is preferably added in an amount of 300 to 500 parts by weight based on 100 parts by weight of the amine. When the content of the unsaturated fatty acid oil is out of the above range, the content of diester or triester may increase depending on the unreacted material or type of amine, thereby reducing physical properties.

Next, the compound of Formula 1 can be prepared by reacting the amine ester obtained after the reaction with a quaternizing agent in a reaction solvent to quaternize it as described above.

The quaternizing agent usable in the present invention may include, for example, dimethyl sulfate, methyl chloride, and diethyl sulfate, among which dimethyl sulfate or methyl chloride is preferably used in terms of improving the physical properties of the product.

The quaternization reaction may use a method conventionally performed, for example, as a reaction solvent, ethanol (ethyl alcohol), propyl alcohol (propyl alcohol), hexylene glycol (hexylene glycol), butyl alcohol (butyl alcohol), Any one or a plurality of alcohols selected from the group consisting of isopropyl alcohol, ethylene glycol, glycerine, propylene glycol and polyethylene glycol may be used. , The reaction solvent is preferably 5 to 30% by weight of the total amount of the reactants. In addition, the quaternization agent is preferably 50 to 200 parts by weight based on 100 parts by weight of the amine.

The quaternization reaction is preferably performed at a reaction temperature of 40 to 80° C. for 1 to 10 hours.

The cationic surfactant derived from a natural material prepared by the present invention may have a structure as shown in Formula 1 below.

[Formula 1]

(In Formula 1, R ₁ and R ₂ are each independently CH ₃ , (CH ₂ ) ₂ OH, (CH ₂ ) ₂ OCOR ₃ ;

R ₃ is a (C8-C22)alkyl or (C8-C22)alkenyl group;

A is CH ₂ CH ₂ or CH ₂ CH ₂ CH ₂ ;

X is halogen, CH ₃ SO ₄ or CH ₃ CH ₂ SO ₄ )

In the cationic surfactant according to the present invention, unsaturated fatty acid oil (melting point 5 to 10 ° C.) as a starting material is tallow (melting point 60 to 70 ° C.), palm oil ( The melting point is very low compared to 45 to 60° C.), and fluidity can be secured even at low temperatures, and there is an advantage of high workability.

The cationic surfactant prepared from the unsaturated fatty acid oil derived from a natural component of the present invention as a starting material is characterized in that it is an unsaturated fatty acid oil extracted from blue fish or vegetable oil, such as a hydrophobic group composed of an alkyl group. In order to synthesize this structure, an amine, more preferably dimethylethanolamine, is used, and a quaternizing agent, more preferably, at least one of dimethylsulfate, diethylsulfate and methylchloride may be used.

The present invention may include personal care products containing an unsaturated fatty acid oil cationic surfactant, and more specifically, may include all cosmetics according to the definition of the Cosmetics Act enforcement regulations. Specifically, children's products such as children's shampoo, conditioner, lotion, cream, oil, and cleaning products; bath products such as bath oils, tablets, capsules, salts, and bubble baths; products for human body cleansing such as foam cleanser, body cleanser, and liquid soap; eye cosmetic products such as eyebrow pencil, eye liner, eye shadow, mascara, and eye makeup remover; fragrance products such as perfume, powder fragrance, sachet, and cologne; Hair conditioners, hair tonics, hair grooming aids, hair creams/lotions, hair oils, pomades, hairsprays/mousses/waxes/gels, shampoos, conditioners, permanents hair products such as permanent wave and hair straightener; Basic makeup products such as astringent, softening, and nourishing face lotions, massage creams, essences, oils, powders, body products, packs, masks, products around the eyes, lotions, creams, and cleansing waters are included.

The present invention is limited to the direct transesterification of an oil containing C20 or more omega-3 fatty acids contained in plants or fish, rather than a general cationic surfactant synthesis method, and the cationic surfactant thus prepared as described above It can be used as a component of the same personal care composition.

In addition, oils that exist in nature containing omega-3 fatty acids contain diperpenes, sterols, and polyphenols inside, so they can be included in the final personal care product group as they are and act as active ingredients, and the present invention is one of them. It is characterized in that any one or a plurality of selected active ingredients are further included.

Hereinafter, the pour point of the raw material itself for the present invention will be evaluated using examples and comparative examples, and the usage performance will be performed for hair care products and body cleanser products to be described in more detail. However, the following examples and comparative examples are merely examples for explaining the present invention in more detail, and the present invention is not limited by the following examples and comparative examples.

The physical properties of the specimens prepared in the following Examples and Comparative Examples were measured as follows.

(pour point)

The test was conducted according to the ASTM D97 method, and the container containing the sample was placed in a low-temperature circulator, and the temperature was lowered to measure the flow temperature. The pour point was defined as the temperature obtained by adding 3°C to the temperature at which the container was tilted and maintained for 5 seconds.

(Hair conditioner moisturizing power)

After making a hair tress with a length of 10 cm and a weight of 1 g and sufficiently wet the specimens of Examples and Comparative Examples below, the weight of the sample applied to the hair tress was maintained to be around 0.3 g, and dried at 50° C. for 2 hours. Thereafter, it was stored for 24 hours at 25°C and 70% relative humidity. Then, the middle part of the hair tress was cut to be 2 cm and 0.15 g, and the moisture content was measured using a moisture titrator (Karl fischer).

(sensory evaluation of hair conditioner)

First, the hair of the test subject was washed with shampoo (LG Household & Health Care Elastin), and then the hair conditioner composition prepared according to Example was applied to the hair, and then used 3 times for 9 days. And 20 professional evaluators sensory-evaluated the condition of the hair. At this time, the sensory evaluation items were the feel of wet hair and the feel of dry hair, and 20 evaluators scored for each item and averaged it according to the following evaluation criteria.

5: Excellent

4: good

3: Normal

2: Insufficient

1: bad

(Hair conditioner comb texture evaluation)

After the pre-treatment was completed, the hair tress was divided into 20 cm in length and 10 g in weight, 1 g of the specimens of Examples and Comparative Examples were applied, rinsed for 30 seconds, and the hair tress bundle was washed again with 10% SLS (Sodium Lauteth Sulfate) aqueous solution. Afterwards, rinse with plenty of water and wipe off excess water with your fingers. The wet hairdresser was hung on the load cell ring of the Instron, the comb was fixed using a jig, and the load value taken during combing was measured by operating the Instron. After the same hair was completely dried with a towel and a dryer, it was left for 2 hours in a constant temperature and humidity room, and then hung on an Instron to perform the test in the same way.

At this time, the comb was made of a cylindrical matte stainless steel material, and a comb with a diameter of 1 mm and an interval between the teeth of 1 mm was used. The cross head speed of Instron was 500.00 mm/min., the load cell was 10.0 kg/Limit Type, and the displacement was 200.00 mm, and the hair bundle was applied to each composition. Prepare 3 or more for each item, test at least 3 times for each item to calculate the average of the load value, and then compare the average load value after treatment to the average load value after treatment of the composition. Predominance of comb texture was evaluated.

(Sensory evaluation of body cleanser)

Twenty test subjects were allowed to use the body cleanser compositions prepared according to Examples and Comparative Examples for 10 days. Twenty test subjects performed sensory evaluation on the feeling of use, and at this time, the sensory evaluation items were to evaluate the softness and moisture of the skin as a whole, and 20 evaluators scored each item according to the following evaluation criteria and averaged it.

5: Excellent

4: good

3: Normal

2: Insufficient

1: bad

Prior to carrying out the Examples and Comparative Examples in the present invention, surfactant synthesis was performed as in the Synthesis Example below, and the synthesized cationic surfactant was manufactured as a hair conditioner and a body cleanser as in the following Examples, and quality evaluation was performed. Synthesis Examples, Examples, and Comparative Examples tested at this time are as follows.

(Synthesis Example 1)

Natural oil containing 10% of omega-3 fatty acid eicosapentaenoic acid having 20 carbon atoms is used in a known manner, and 435 g of oil is placed in a 4-neck flask equipped with a mechanical stirrer, thermometer, condenser, and distillation device under nitrogen atmosphere. and 105 g of dimethylethanolamine were reduced to 20 torr, and the reaction was carried out at 180° C. for 8 hours. At this time, sodium hydroxide and hyperphosphorous acid were used as catalysts. After the reaction was completed, the acid value was 2 or less. After cooling, 50 g of isopropyl alcohol was added thereto, and 148 g of dimethyl sulfate was gradually added dropwise while maintaining the temperature below 55°C. After the dropwise addition was completed, the reaction was carried out at 55° C. for 5 hours, and the reaction was terminated to obtain a compound.

(Synthesis Example 2)

In Synthesis Example 1, the reaction was carried out in the same manner to obtain a compound, except that natural oil containing 18% of omega-3 fatty acid eicosapentaenoic acid having 20 carbon atoms was used.

(Synthesis Example 3)

The reaction was carried out in the same manner as in Synthesis Example 1, except that 148 g of methyl chloride was used instead of dimethyl sulfate as a quaternizing agent to obtain a compound.

[Table 1] - Pour point evaluation

As shown in Table 1, the cationic surfactant prepared according to the present invention has a lower pour point than the conventional behentrimonium chloride (BTAC), cetyltrimethylammonium chloride (CTAC), and stearyltrimethylammonium chloride (STAC). Through this, it can be seen that the cationic surfactant according to the present invention has a high dispersibility, a good feeling of use, and a low pour point, so that it can be easily stored and used compared to conventional products using palm oil.

For the cationic surfactants prepared in [Synthesis Example 1] and [Synthesis Example 2], hair conditioners were prepared through the examples below and then the performance was verified. After preparing the hair conditioner in the same way with three kinds of nium chloride and behentrimonium chloride, the quality was compared.

The manufacture of hair conditioner was carried out with the composition shown in [Table 2] below, and the quality evaluation of the product was carried out by the method described above and indicated in [Table 2].

(Example 1)

For the composition of Example 1 in [Table 2], the cationic surfactant, cetearyl alcohol, amidomethicone, and dimethicone prepared by Synthesis Example 1 were added to the reactor A, and the temperature was raised to 83° C., followed by stirring. . Meanwhile, glycerin and purified water were added to the reactor B and stirred. After sufficient stirring, the mixture of reactor B was slowly added while maintaining the agitation of reactor A, and the mixture was stirred at high speed with a homomixer for 3 minutes. After cooling the mixture to 45° C., phenoxyethanol was added and stirred, and pH was adjusted using citric acid. was carried out

(Example 2)

A conditioner was prepared in the same manner by using the cationic surfactant prepared by Synthesis Example 2 instead of the cationic surfactant prepared by Synthesis Example 1 of Example 1.

(Comparative Example 1)

A conditioner was prepared in the same manner by using steatrimonium chloride instead of the cationic surfactant prepared by Synthesis Example 1 of Example 1.

(Comparative Example 2)

A conditioner was prepared in the same manner using the cationic surfactant prepared in Synthesis Example 1 of Example 1, instead of cetrimonium chloride.

(Comparative Example 3)

A conditioner was prepared in the same manner by using the cationic surfactant prepared in Synthesis Example 1 of Example 1, instead of behentrimonium chloride.

[Table 2]

As shown in [Table 2], the hair conditioner prepared with the cationic surfactant according to the present invention shows excellent values in all sensory evaluation items, such as the degree or texture of wet combing, and the degree of combing in dry state. In particular, considering that the greater the negative (-) value in the comb texture, the better the comb texture. It can also be seen that the texture is superior to other products regardless of the degree of wetness of the hair.

In addition, the specimens of Comparative Examples 1 to 3, which have weak affinity for water, all showed lower than the condition (9.74%) using only purified water, but the specimens of Examples 1 and 2 showed much higher moisturizing power than those of Comparative Examples. there is.

In addition, the performance of the cationic surfactant prepared in [Synthesis Example 1] and [Synthesis Example 2] was verified after preparing a body cleanser through the examples below, and in this case, the same performance was verified using the commercially available component Polyquaternium-7. After preparing the body cleanser by this method, the quality was compared.

The body cleanser was manufactured with the composition shown in [Table 3] below, and the quality evaluation of the product was carried out by the method described above and indicated in [Table 3].

(Example 3)

Using the cationic surfactant prepared by [Synthesis Example 1] as in the composition of Example 3 in [Table 3], water was first added to the reactor, and then the raw materials were added in order while maintaining stirring, and then well A body cleanser was prepared by stirring.

(Example 4)

A body cleanser was prepared in the same manner by using the cationic surfactant prepared by [Synthesis Example 2] instead of the cationic surfactant prepared by [Synthesis Example 1] of Example 3.

(Example 5)

Instead of the cationic surfactant prepared by [Synthesis Example 1] of Example 3, the cationic surfactant prepared by [Synthesis Example 1] and polyquatermium-7 were mixed and used to prepare a body cleanser in the same manner.

(Example 6)

Instead of the cationic surfactant prepared in [Synthesis Example 1] of Example 3, the cationic surfactant prepared by [Synthesis Example 2] and polyquatermium-7 were mixed and used to prepare a body cleanser in the same manner.

(Comparative Example 4)

A body cleanser was prepared in the same manner by using the cationic surfactant prepared in [Synthesis Example 1] of Example 3, instead of polyquatermium-7 alone.

[Table 3]

As shown in [Table 3], the body cleanser prepared with the cationic surfactant according to the present invention has a superior feel compared to Polyquaternium-7, and the mixing synergy is also excellent when mixed with the present invention than when using Polyquaternium alone. could check

From the above description, those skilled in the art to which the present invention pertains will understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential characteristics thereof. In this regard, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention should be construed as being included in the scope of the present invention, rather than the above detailed description, all changes or modifications derived from the meaning and scope of the following claims and their equivalents.

Claims (6)

A cationic surfactant of Formula 1 below, characterized in that it is prepared by reacting an esteramine obtained by esterifying an unsaturated fatty acid with an amine with a quaternizing agent, wherein the cationic surfactant is an omega-3 fatty acid in which R ₃ is C20 or higher Cationic surfactant, characterized in that the substituted structure comprises at least 1% by weight of 100% by weight of the total.
[Formula 1]

(In Formula 1, R ₁ and R ₂ are each independently CH ₃ , (CH ₂ ) ₂ OH, (CH ₂ ) ₂ OCOR ₃ ;
R ₃ is a (C8-C22)alkyl or (C8-C22)alkenyl group;
A is CH ₂ CH ₂ or CH ₂ CH ₂ CH ₂ ;
X is halogen, CH ₃ SO ₄ or CH ₃ CH ₂ SO ₄ ) The method of claim 1,
The amine is a cationic surfactant, characterized in that any one or a plurality selected from dimethylethanolamine, methyldiethanolamine and triethanolamine. 3. The method of claim 2,
The amine is a cationic surfactant, characterized in that dimethylethanolamine. The method of claim 1,
The unsaturated fatty acid is a cationic surfactant, characterized in that it contains one or more selected from eicosapentaenoic acid, docosahexaenoic acid and docosapentaenoic acid in 1% by weight or more based on 100% by weight of the total. The method of claim 1,
The quaternizing agent is any one or a plurality of cationic surfactants selected from dimethyl sulfate, diethyl sulfate and methyl chloride. A personal care composition comprising the cationic surfactant according to any one of claims 1 to 5.