JPH0860188A - Detergent composition - Google Patents

Abstract

PURPOSE: To obtain a detergent composition for hair and body weakly stimulant and excellent in detergency and foaming ability and containing a polyoxyethylene alkyl ether-based nonionic surfactant, a betaine-based surfactant and a specific nonionic surfactant. CONSTITUTION: This surfactant composition is obtained by blending (A) 10-50wt.% of a polyoxyethylene alkyl ether-based nonionic surfactant of formula I (R<1> is a 11-15C alkyl or alkenyl; (n) is 11-30), (B) 1-10wt.% of a betaine-based surfactant and (C) 1-10wt.% of >=1 nonionic surfactants such as the surfactant of formula II (R<2> is an 8-18C alkyl or alkenyl), formula III (R<3> is a 6-18C alkyl or alkenyl; R<4> is a 2-4C alkylene; G is a 5-6C residue derived from a reduced sugar; (s) is a 0-10 integer; (t) is 1-10), formula IV [one of R<5> , R<6> and R<7> is O=CR<8> (R<8> is a 6-18C alkyl or alkenyl) and the rest two are each H], formula V (R<9> is an 8-16C alkyl or alkenyl; (u) and (v) are each 0-10, at least one of (u) and (v) is >=1), etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detergent composition which is excellent in detergency and foaming property and has low irritation, and in particular, a cationic conditioning agent can be stably added to the detergent composition. The present invention relates to a detergent composition capable of obtaining a high rinsing effect and a conditioning effect.

[0002]

2. Description of the Related Art Conventional cleaning agents, particularly hair cleaning agents,
Anionic surfactants are often used as the main base because of their excellent detergency and foaming power. However, since anionic surfactants are highly irritating, they are often used in combination with a hypoallergenic active agent when incorporated into a hair cleansing agent, and a milder hair cleaning agent is desired. There is.

Further, in recent years, many cleaning agents having a conditioning effect have been studied. Many cationic substances are known as substances having a conditioning effect, but when a cationic substance such as a detergent containing an anionic surfactant as a main base is blended, the cationic substance and the anionic surfactant are mixed. Since a complex with the agent is formed, there is a problem that the compounding is difficult and the conditioning effect is not sufficiently exhibited.

Therefore, a cleaning agent based on a nonionic surfactant, which is less irritating than an anionic surfactant and is easy to mix with a cationic conditioning agent, has been investigated. For example, a non-irritant detergent composition containing an alkyl saccharide-based nonionic surfactant and a cationic polymer as an alkyl saccharide-based nonionic surfactant (Japanese Patent Publication No. 6-230
No. 85), a detergent composition containing an alkyl saccharide-based nonionic surfactant and sucrose fatty acid ester and an anionic surfactant or an amphoteric surfactant (Japanese Patent Publication No. 6-
No. 23086) is known.

However, since alkyl saccharide-based nonionic surfactants are relatively expensive, attempts have also been made to blend polyoxyethylene alkyl ether type nonionic surfactants, which are generally cheaper than these, into detergents. However, since polyoxyethylene alkyl ether type nonionic surfactants generally have poor foaming properties, they are rarely used in hair detergents, and amidoamine type amphoteric activators or alkylolamide type nonionic activators are the main active agents. Shampoo composition containing a polyoxyethylene type activator as an auxiliary ingredient (Japanese Patent Laid-Open No. 55-25
No. 436) is known.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a detergent composition which is excellent in detergency and foamability, has low irritation, and can be stably blended with a cationic conditioning agent. To provide.

[0007]

Under such circumstances, the inventors of the present invention have conducted diligent research and, as a result, have found that a specific polyoxyethylene alkyl ether type nonionic surfactant, a betaine type surfactant and a specific nonionic surfactant are used. It was found that a detergent composition having a high detergency, a high foaming property and a low irritation can be obtained by combining the agent with a specific ratio, and completed the present invention.

That is, the present invention provides the following component (A),
(B) and (C): (A) General formula (1);

[0009]

Embedded image R ¹ O- (CH ₂ CH ₂ O) _n -H (1)

(In the formula, R ¹ represents a linear or branched alkyl group or alkenyl group having 11 to 15 carbon atoms, and n is 1
10 to 50% by weight of polyoxyethylene alkyl ether type nonionic surfactant represented by the formula (1 to 30), (B) betaine type surfactant
1 to 10% by weight, (C) general formula (2) to
(5);

[0011]

[Chemical 10]

(In the formula, R ² represents a linear or branched alkyl group or alkenyl group having 8 to 18 carbon atoms)

[0013]

[Chemical Formula 11] R ^3- (OR ⁴ ) _s -G _t (3)

(In the formula, R ³ represents a linear or branched alkyl or alkenyl group having 6 to 18 carbon atoms, R ⁴ represents an alkylene group having 2 to ⁴ carbon atoms, and G represents 5 or 5 carbon atoms. 6
Is a reducing sugar-derived residue, s is an integer of 0 to 10,
(t is a number from 1 to 10)

[0015]

[Chemical 12]

(In the formula, only one of R ⁵ , R ⁶ and R ⁷ is O = CR ⁸ (R ⁸ represents a linear or branched alkyl or alkenyl group having 6 to 18 carbon atoms) , And the other two represent hydrogen atoms.)

[0017]

[Chemical 13]

(In the formula, R ⁹ represents a linear or branched alkyl or alkenyl group having 8 to 16 carbon atoms, and u and v
Each represents an integer of 0 to 10, at least one of u and v is 1 or more), and contains 1 to 2 or more 1 to 10 wt% selected from the nonionic surfactants represented by (A ) / [(B) + (C)] weight ratio is 1/1 to
The present invention provides a cleaning composition which is 10/1.

The component (A) polyoxyethylene alkyl ether type nonionic surfactant used in the present invention is
It is represented by the general formula (1), wherein R ¹
Examples of the linear or branched alkyl group or alkenyl group having 11 to 15 carbon atoms represented by are undecyl groups,
Examples thereof include dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, undecenyl group, dodecenyl group, tridecenyl group, tetradecenyl group and pentadecenyl group. As the component (A), the carbon number of R ¹ is 11 to ¹
5 and the number n of ethylene oxide added is 11 to 30
It is necessary to satisfy the following conditions, and sufficient detergency and foamability cannot be obtained outside this range. Of these, those in which R ¹ has 12 to 14 carbon atoms and n is 15 to 25 are preferable because higher foaming property can be obtained.

The polyoxyethylene alkyl ether type nonionic surfactant of the component (A) serves as the main base of the detergent composition of the present invention, and is contained in an amount of 5 to 50% by weight (hereinafter, simply %), Preferably 10-30%,
Particularly preferably, the content is 10 to 20%. If it is less than 5%, sufficient cleaning performance and foamability cannot be obtained, and 50%
When it exceeds the above range, the viscosity of the detergent becomes high and it becomes difficult to mix other components, which is not preferable.

The betaine-type surfactant of the component (B) used in the present invention may be any of carbobetaine-type, sulfobetaine-type, imidazolinium-betaine-type and the like, among which the general formula (8)

[0022]

Embedded image

(In the formula, R ¹⁸ is a linear or branched alkyl or alkenyl group having 8 to 20 carbon atoms or R ¹⁹ C
ONH (CH ₂ ) _z- (R ¹⁹ represents a linear or branched alkyl group or alkenyl group having 8 to 20 carbon atoms, z represents an integer of 1 to 5), and M represents A hydrogen atom, an alkali metal or triethanolamine, and y represents an integer of 1 to 5), a carbobetaine-type surfactant represented by the general formula (9)

[0024]

[Chemical 15]

(In the formula, R ²⁰ represents a linear or branched alkyl group or alkenyl group having 8 to 20 carbon atoms, and M and y
Represents the same meaning as described above) and is preferably a sulfobetaine-type surfactant. Further, the carbobetaine type surfactant represented by the general formula (8) is preferable, and among them, the fatty acid amide propyl betaine in which R ¹⁸ is R ¹⁹ CONH (CH ₂ ) ₃ — in the general formula (8) is preferable.

The betaine type surfactant as the component (B) is contained in the entire composition in an amount of 1 to 10%, preferably 1 to 5%, particularly preferably 1 to 3%. If it is less than 1%, sufficient detergency and foamability cannot be obtained, and if it exceeds 10%, it is not preferable in terms of irritation.

The nonionic surfactant as the component (C) used in the present invention is an alkyldimethylamine oxide represented by the general formula (2), an alkyl saccharide represented by the general formula (3), or a general formula (4). And a alkanolamide represented by the general formula (5). As the alkyldimethylamine oxide represented by the general formula (2),
In the formula, R ² is preferably an alkyl group having 10 to 16 carbon atoms, and particularly preferably a decyl group, a lauryl group or a myristyl group. In the alkyl saccharide represented by the general formula (3), in the formula, R ³ has 10 to 14 carbon atoms.
The alkyl group of is preferably a decyl group, a dodecyl group,
A tetradecyl group is preferable, and R ⁴ is preferably an ethylene group or a propylene group. The structure of G is determined by a monosaccharide or a saccharide having two or more sugars used as a raw material, and glucose, galactose and fructose are particularly preferable. s is preferably 0 to 2, and t is preferably 1 to 2. As the alkyl saccharide (3), s = 0
And an alkyl polyglucoside in which G is a residue derived from glucose is preferable. In the fatty acid monoglyceride represented by the general formula (4), R ^{8 in} the formula has 8 carbon atoms.
It is preferably -12. As the alkanolamide represented by the general formula (5), in the formula, R ⁹ has 10 carbon atoms.
-14 are preferable, and u and v are preferably 0-3.

Of these, the alkyldimethylamine oxide represented by the general formula (2) and the fatty acid monoglyceride represented by the general formula (4) are preferable because the foamability can be further enhanced, and further, the general formula (4) Among the fatty acid monoglycerides represented by), decanoic acid monoglyceride and lauric acid monoglyceride are preferable.

The nonionic surfactants as the component (C) may be used either individually or in combination of two or more, especially 2
It is preferable to use a combination of two or more kinds because the foaming property can be further enhanced. The nonionic surfactant as the component (C) is blended in an amount of 1 to 10%, preferably 1 to 5% in the total composition. If it is less than 1%, sufficient detergency and foamability cannot be obtained, and if it exceeds 10%, detergency may be impaired.

Further, in the detergent composition of the present invention,
The blending amount of the component (A) is a weight ratio (A) / [(B) + (C)] to the total blending amount of the components (B) and (C),
It is necessary to be in the range of 1/1 to 10/1, and if it is out of this range, the cleaning performance, the foaming property and the low irritation cannot be exhibited at the same time. This weight ratio is preferably 3/2 to 3/1 because the foaming property is further enhanced.

Further, a cationic conditioning agent can be easily incorporated into the detergent composition of the present invention, and a sufficient conditioning effect can be obtained. As such a cationic conditioning agent,
Cationic surfactants, cationic polymers and the like,
Of these, the cationic surfactants represented by the general formula (6) or (7) are preferable because of their high conditioning effect.

[0032]

Embedded image

(In the formula, R ¹⁰ represents a straight chain or branched chain alkyl or alkenyl group having 8 to 22 carbon atoms, and R ¹¹ represents a hydrogen atom, a methyl group, an ethyl group or a straight chain having 8 to 22 carbon atoms. Or a branched alkyl group or an alkenyl group, R ¹² and R ¹³ each represent a hydrogen atom, a methyl group or an ethyl group, and X represents a halogen atom or an organic anion group)

[0034]

[Chemical 17]

(In the formula, R ¹⁴ is a straight or branched chain carbon number 7
~ 35 alkyl group or alkenyl group, R ¹⁵ , R ^15
16 and R ¹⁷ are the same or different and represent an alkyl group or a hydroxyalkyl group having 1 to 4 carbon atoms or a hydrogen atom, and M is -CONJ- (J is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group. Group)), -O- or -COO-, and Y is a hydrogen atom, a hydroxyl group, a linear or branched alkyl group having 1 to 36 carbon atoms, an alkenyl group or a hydroxyalkyl group or a formula

[0036]

Embedded image

X represents a hydrogen atom or a hydroxyl group, w represents a number of 2 or 3, and x represents an integer of 0 or 1 to 5. However, when x = 1, X
Represents a hydrogen atom or a hydroxyl group, x = 0, 2,
In the case of 3, 4, and 5, X represents a hydrogen atom)

Further, those represented by the general formula (7), especially R ^{14 in} the formula has 7 to 21 carbon atoms, particularly 11 to 1 carbon atoms.
No. 7, R ¹⁵ , R ¹⁶ and R ¹⁷ are a methyl group or an ethyl group, M is —CONH—, Y is a hydrogen atom or a hydroxyl group, and X is a hydrogen atom or a hydroxyl group. It is preferable because it increases. These cationic conditioning agents are preferably added in an amount of 1 to 10% in the total composition, and particularly preferably added in an amount of 3 to 8% because a more excellent conditioning effect can be obtained.

Further, the detergent composition of the present invention may contain an anionic surfactant which is usually used in detergents, within a range that does not impair the effects of the present invention. Examples of such anionic surfactants include alkyl sulfates, alkyl ether sulfates, alkyl sulfonates, sulfosuccinates, α-sulfo fatty acid ester salts, α-olefin sulfonates, saturated or unsaturated fatty acid salts, and monophosphoric acid salts. Examples thereof include ester type surfactants and acylated amino acids.

Further, the cleaning composition of the present invention can contain a silicone derivative in a range that does not impair the effects of the present invention, and a good slippery feel and a smooth feel can be obtained. The silicone derivative is not particularly limited as long as it is usually blended in detergents and cosmetics, and examples thereof include dimethylpolysiloxane, methylphenylpolysiloxane, polyether-modified silicone, epoxy-modified silicone, alkoxy-modified silicone, amino-modified silicone. Etc.

Furthermore, in the detergent composition of the present invention, in addition to the above-mentioned components, if necessary, components usually added to cosmetics, pharmaceuticals, foods, etc., such as anti-dandruff agents, bactericides, anti-inflammatory agents, etc. Agents, medicinal agents, preservatives; humectants such as propylene glycol, glycerin, diethylene glycol monoethyl ether, sorbitol, panthenol; coloring agents such as dyes and pigments; conditioning agents such as perfluoropolyether; pearling agents, hydroxypropyl Chitosan derivatives such as chitosan; various blended fragrances; other encyclopedia of shampoo ingredients [E
NCYCLOPEDIA OF SHAMPOO AN
GREDIENTS (MICELLE PRESS 1
985)] and the like can be appropriately blended within a range that does not impair the effects of the present invention.

The detergent composition of the present invention can be produced by a usual method, and can be made into a paste, gel, liquid, or other dosage form. Further, it is suitable as a detergent for hair and body, and is particularly suitable as a detergent for hair and a rinse-in shampoo containing a cationic conditioning agent.

[0043]

The detergent composition of the present invention is excellent in detergency and lathering and has low irritation, and is useful as a detergent for hair and a detergent for body. In addition, a cationic conditioning agent can be easily and stably compounded, and particularly when used as a hair cleaning agent (rinse-in shampoo), the fingers can be easily passed during hair washing and rinsing, and it remains soft and natural after drying. Can be finished, and good combed streets can be obtained.

[0044]

The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples.

Example 1 Shampoos having the compositions shown in Tables 1 to 4 were produced by a conventional method, and their detergency, foamability and skin irritation were evaluated. The results are shown in Tables 1 to 4.

(Evaluation method) Detergency: 20 g (15 cm) of hair of a healthy Japanese woman was coated with 1 g of shampoo solution, washed for 1 minute, and the feeling after rinsing was evaluated by 20 professional panelists according to the following criteria. It was evaluated by. ⊚: Very good (90% or more of the people evaluated that the detergency was good). ◯: Good (80 to less than 90% of the people evaluated that the detergency was good). Δ: Slightly poor (70 to 80% or less of people evaluated that the detergency was good). X: Poor (less than 70% of people evaluated that the cleaning power was good).

Foaming property: 800 ml of a 20-fold diluted shampoo solution (liquid temperature 20 ° C.) was poured into a cylinder, a stirring blade was placed in the solution and rotated for 5 minutes, then allowed to stand for 30 seconds and foamed. Was evaluated according to the following criteria. The rotation speed of the stirring blade was 1000 rpm and it was reversed every 5 seconds. A: Very good foaming. ○: Good foaming. Δ: Foaming, but felt insufficient. X: Almost no foaming.

Skin irritation: By 20 professional panelists,
The operation of immersing the hand in each shampoo solution for 5 minutes and then drying was repeated 10 times, and the evaluation was performed according to the following criteria. ⊚: 90% or more of people felt that the irritation was low. A: 80 to less than 90% of people felt that the irritation was low. Δ: 70 to less than 80% of people felt that the irritation was low. X: Less than 70% of people felt that the irritation was low.

[0049]

[Table 1]

[0050]

[Table 2]

[0051]

[Table 3]

[0052]

[Table 4]

Example 2 Shampoos having the compositions shown in Tables 5 to 7 were produced by a conventional method, and the washability, foaming property and skin irritation were evaluated in the same manner as in Example 1. Also, the softness of the hair after drying and the stability of the cleaning agent were evaluated. The results are shown in Tables 5 to 7.

(Evaluation method) Softness of hair after drying: 20 g of hair of a healthy Japanese woman
Apply 1 g of shampoo liquid to (15 cm), lather it for 1 minute, rinse with water, dry with a towel, and then dry with a dryer using a specialized panelist. Regarding the softness of hair after drying, use the following criteria. evaluated. ◎; Very soft and supple. ○: Soft. Δ: A little lacking in softness. ×: Stiff.

Stability of detergent: After the shampoo was prepared, it was shaken vigorously and allowed to stand at 20 ° C. for 1 week, and the state of the liquid was visually evaluated according to the following criteria. ◯: It is a uniform liquid. B: Almost uniform liquid, but some precipitate. X: There is considerable precipitate.

[0056]

[Table 5]

[0057]

[Table 6]

[0058]

[Table 7]

Example 3 (Shampoo) A shampoo having the following composition was produced by a conventional method. The obtained shampoo was excellent in washing property and foaming property, and had little irritation.

[0060]

[Table 8] (Components) (%) Polyoxyethylene (15) lauryl ether 10.0 Lauryl hydroxysulfobetaine 1.0 Alkyl glucoside ¹⁾ 2.0 Decanoic acid monoglyceride 3.0 Cationized cellulose ²⁾ 0.3 Hydroxy Ethyl cellulose ³⁾ 0.1 Silicone emulsion ⁴⁾ 1.0 pH adjuster Appropriate amount Dye Appropriate amount Perfume Appropriate amount Water balance 100.0 1): In the general formula (3), R ³ = C ₁₀ H ₂₁ , s = 0, G = Glucose residue, t = 1.2 2): JR400 (manufactured by UCC) 3): HEC-SE850 (manufactured by Shin-Etsu Chemical Co., Ltd.) 4): SM-8702C (manufactured by Toray Dow Corning)

Example 4 (rinse-in shampoo) A rinse-in shampoo having the following composition was produced by a conventional method. The obtained rinse-in shampoo has cleaning performance,
It had excellent foaming properties, low irritation, and a high rinsing effect.

[0062]

[Table 9] (Components) (%) Polyoxyethylene (20) lauryl ether 10.0 Lauryl dimethylamine oxide 2.0 Lauric acid amidopropyl betaine 3.0 Decanoic acid monoglyceride 2.0 Trimethylstearyl ammonium chloride 2.0 Silicone Emulsion ⁵⁾ 3.0 Ethylene glycol distearate 1.0 pH adjuster Appropriate amount Dye Appropriate amount Perfume Appropriate amount Water balance 100.0 5): BY22-029 (Toray Dow Corning)

Example 5 (Body shampoo) A body shampoo having the following composition was produced by a conventional method. The obtained body shampoo had excellent cleaning performance, foaming performance, and low irritation.

[0064]

[Table 10] (Components) (%) Polyoxyethylene (20) lauryl ether 16.0 Lauroyl diethanolamide 3.0 Alkyl glucoside ⁶⁾ 2.0 Lauric acid amide propyl betaine 2.0 Decanoic acid monoglyceride 2.0 Distearic acid Ethylene glycol 1.0 pH adjuster Appropriate amount Colorant Appropriate amount Perfume Appropriate amount Water balance 100.0 6): In the general formula (3), R ³ = C ₁₀ H ₂₁ , s = 0, G = glucose residue, t = 1.2

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location C11D 1/75 1/90

Claims (9)

[Claims] 1. The following components (A), (B) and (C): (A) General formula (1); embedded image R ¹ O— (CH ₂ CH ₂ O) _n —H (1) (In the formula, R ¹ represents a linear or branched alkyl group or alkenyl group having 11 to 15 carbon atoms, and n represents a number of 11 to 30), which is a polyoxyethylene alkyl ether type nonionic surfactant. 10 to 50% by weight, (B) betaine type surfactant 1 to
10% by weight, (C) general formulas (2) to (5); (In the formula, R ² represents a linear or branched alkyl or alkenyl group having 8 to 18 carbon atoms) embedded image R ³ — (OR ⁴ ) _s —G _t (3) (wherein R 2 ³ represents a linear or branched alkyl or alkenyl group having 6 to 18 carbon atoms, R ⁴ represents an alkylene group having 2 to ⁴ carbon atoms, and G represents a residue derived from a reducing sugar having 5 or 6 carbon atoms. Represents a group, s is an integer of 0 to 10, and t is 1 to 10.
The number of) (In the formula, only one of R ⁵ , R ⁶ and R ⁷ is O = CR
⁸ (R ⁸ represents a linear or branched alkyl group or alkenyl group having 6 to 18 carbon atoms), and the remaining two represent hydrogen atoms. (In the formula, R ⁹ represents a linear or branched alkyl group or alkenyl group having 8 to 16 carbon atoms, and u and v are 0 respectively.
An integer of from 10 to 10 and at least one of u and v is 1 or more), and contains 1 to 2 or more 1 to 10 wt% selected from the nonionic surfactants represented by (A)
/ [(B) + (C)] in a weight ratio of 1/1 to 10/1. 2. In the general formula (1), R ¹ has ¹ carbon atom.
The cleaning composition according to claim 1, which is a linear or branched alkyl group or an alkenyl group of 2 to 14, and n is a number of 15 to 25. 3. The cleaning composition according to claim 1 or 2, wherein the component (B) is a carbobetaine-type amphoteric surfactant. 4. The component (C) is represented by the general formula (2) or (4).
4. A nonionic surfactant represented by
The cleaning composition according to any one of 1. 5. The cleaning composition according to claim 1, wherein the weight ratio of (A) / [(B) + (C)] is 3/2 to 3/1. 6. The cleaning composition according to claim 1, further comprising a cationic conditioning agent. 7. A cationic conditioning agent of 0.
The cleaning composition according to claim 6, which contains 1 to 10% by weight. 8. The cationic conditioning agent is represented by the general formula (6) or (7); (In the formula, R ¹⁰ represents a linear or branched alkyl or alkenyl group having 8 to 22 carbon atoms, and R ¹¹ represents a hydrogen atom, a methyl group, an ethyl group, or a linear or branched chain having 8 to 22 carbon atoms. An alkyl group or an alkenyl group, R ¹² and R ¹³ each represent a hydrogen atom, a methyl group or an ethyl group, and X represents a halogen atom or an organic anion group. (In the formula, R ¹⁴ represents a linear or branched alkyl group or alkenyl group having 7 to 35 carbon atoms, and R ¹⁵ , R ¹⁶ and R ¹⁷ are the same or different and each represents an alkyl group having 1 to 4 carbon atoms or Indicates a hydroxyalkyl group or hydrogen atom, M is -CONJ-
(J represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group), -O- or -COO-,
Y is a hydrogen atom, a hydroxyl group, a linear or branched alkyl group having 1 to 36 carbon atoms, an alkenyl group, a hydroxyalkyl group, or a compound represented by the formula: Represents a group represented by, X represents a hydrogen atom or a hydroxyl group, w represents a number of 2 or 3, and x represents 0 or 1 to 5
Indicates an integer. However, when x = 1, X represents a hydrogen atom or a hydroxyl group, and when x = 0, 2, 3, 4, 5, X represents a hydrogen atom). Or the cleaning composition according to 7. 9. The cleaning composition according to claim 6, wherein the cationic conditioning agent is a cationic surfactant represented by the general formula (7).