JPS62883B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a hair rinse composition that provides excellent rinsing effect to hair and a smooth feeling upon finishing. Hair rinse agents are generally widely used to make hair soft and supple, giving it a smooth and moist feel, and making it easier to comb after washing. Quaternary ammonium salts are known as their active ingredients, but because the above-mentioned rinsing effect is insufficient with a single salt, higher alcohols and other oils are usually added in combination. However, since this type of oil is insoluble in water, a large amount of emulsifier must be added to solubilize or emulsify it, which has the disadvantage that the original performance of the rinse agent is significantly reduced. It was hot. As a method to compensate for this drawback, it has already been proposed that a hair rinse agent containing a specific quaternary ammonium salt and polyoxyethylene alkyl phenyl ether phosphate exhibits an excellent rinsing effect. However, when the phosphoric acid ester is used in large quantities or the ratio of the phosphoric acid ester to the quaternary ammonium salt changes, problems such as a heavy or sticky texture have arisen. In addition, recent consumers tend to prefer a smooth feel to their hair after finishing, and it is difficult to meet that demand with the above composition. The inventors conducted extensive research in consideration of the above circumstances, and as a result, they combined a specific quaternary ammonium salt and polyoxyethylene alkyl phenyl ether phosphate system with lanolin fatty acid among general oily components. By doing so, we succeeded in developing a hair rinse composition that has an excellent finish with a smooth feeling without impairing the feel when using the rinse. The hair rinse composition of this invention has a specific quaternary
It contains as essential components 0.4 to 10% by weight of grade ammonium salt, 0.1% by weight or more of polyoxyethylene alkyl phenyl ether phosphate, and 0.1% by weight or more of lanolin fatty acid. And between these ingredients, the following relationships are established: quaternary ammonium salt/(phosphoric acid ester + lanolin fatty acid) = 1/(0.2-0.7), and phosphoric acid ester/lanolin fatty acid = (0.25-4)/1. It is characterized by The quaternary ammonium salt, which is one of the essential components, must have the following general formula. In the formula, R ₁ , R ₂ , R ₃ , and R ₄ are all alkyl groups, and at least two of them are C _8-22 alkyl groups. Moreover, X represents a halogen atom or an alkyl sulfate group in which the alkyl group has 1 to 2 carbon atoms. It is necessary that the amount of the quaternary ammonium salt blended is within the range of 0.4 to 10% by weight in the hair rinse composition. The rinsing effect, which softens hair and makes it easier to comb, can be achieved even with a concentration of about 0.1% by weight, but 0.4% by weight or more is required to achieve a smooth finish. Moreover, if the amount exceeds 10% by weight, the amount of the quaternary ammonium salt adsorbed to the hair will be too large, causing inconveniences such as the hair becoming sticky, which is not preferable. As the second essential component, polyoxyethylene alkyl phenyl ether phosphate is used in this invention. This is the number of moles of EO (ethylene oxide) added: 4
~20 monoesters, diesters, or mixtures thereof represented by the following general formula, where R represents an alkylphenyl group having 4 to 20 carbon atoms. When a mixture of monoester and diester is used, it is desirable that the weight ratio of the two be 1:1. The solubility of this phosphoric acid ester in water varies depending on the number of moles of EO added () and the length of the alkyl chain.
Preferably, the alkyl chain length is in the range of 8 to 12. The amount of phosphate ester blended in this invention is:
It is necessary to account for 0.1% by weight or more in the hair rinse composition. Next, lanolin fatty acids used as the third essential ingredient are generally those listed in the Cosmetic Ingredients Standards.According to research, when 0.1% by weight or more of lanolin fatty acids are added to the hair rinse composition, It can give the hair a smooth feeling when finished. Furthermore, research has shown that in order to obtain sufficient rinsing effect and a smooth feeling, there is an optimal range of blending ratios among the three essential ingredients mentioned above, and it is essential that the following formula holds true: was revealed. Quaternary ammonium salt/(phosphate ester +
lanolin fatty acid) = 1/0.2-0.7, phosphate ester/lanolin fatty acid = 0.25-4.
In other words, an excellent rinsing effect and smooth feeling can only be obtained with a composition that satisfies this relationship. In this invention, in addition to the essential ingredients, commonly used ingredients and additives can be added as necessary. Namely, higher alcohols, liquid paraffin,
These include oils such as glyceride, additives such as collagen derivatives (polypeptides), lanolin derivatives, silicones, and colorants and fragrances, and two or more of these may be added in an appropriate combination. In the hair rinse composition of the present invention, a quaternary ammonium salt, a phosphoric acid ester, and a lanolin fatty acid form a double complex salt, which is stably dispersed in the composition. This double complex salt is a pasty or vaseline-like oily substance that is insoluble in water, and a complex salt of a quaternary ammonium salt and a phosphoric acid ester is also recognized to have excellent water retention ability, but like the complex salt of this invention, When lanolin fatty acids are included, the same or higher water retention ability can be achieved with a small amount. Further, a complex salt of a quaternary ammonium salt and a phosphoric acid ester can provide a moisturizing feeling at the time of finishing, but it is not sufficient to provide a smooth finishing effect on hair. However, according to the double complex salt of the present invention, it is possible to give a sufficiently smooth feeling when finishing hair. In other words, the surface tension of this double complex salt is close to the critical surface tension of hair (27-28 dyn/cm), so
It has unique physical properties that allow it to adhere to the hair and form a uniform oil film, giving the hair a smooth feel. The smooth feeling mentioned here refers to the feeling of smoothness when hair is touched with the hand, and there is a correlation with the coefficient of static friction of the hair, and the smaller the coefficient of static friction, the better the smooth feeling. Therefore, the hair rinse composition of the present invention can surpass conventional products in terms of rinsing effect and smooth feeling upon finishing, as is clear from the Examples below. Next, prior to explaining the examples, an outline of each test method employed will be described. (a) Rinse effect Apply 10g of rinse agent directly to the hair, rinse the hair twice with warm water, and then air dry. Thereafter, it was evaluated by sensory evaluation. If the combability and softness are significantly better than the standard product, ◎, if it is better, ○, if it is the same, △, if it is inferior, ×, if it is extremely inferior, ×
Evaluate it as ×. (B) Smoothness Apply 10g of the conditioner directly to the hair, rinse the hair twice with warm water, and then air dry. Thereafter, it was evaluated by sensory evaluation. If the smoothness is significantly better than the standard product, it will be evaluated as ◎, if it is excellent, it will be evaluated as ○, if it is the same, it will be evaluated as △, if it is inferior, it will be evaluated as ×, and if it is extremely inferior, it will be evaluated as XX. (c) Coefficient of Static Friction Apply 0.05g of rinse agent to 1g of hair, rinse the hair twice with warm water, and heat to 65%RH and 25℃.
After leaving it for 48 hours, the static friction coefficient was measured. Example 1 Five types of hair rinse compositions were prepared based on the formulation shown in Table 1, and their performance was evaluated.
The results are shown in the same table.

【table】

[Table] As is clear from Table 1, the cationic activator-only products (Nos. 1 to 3) without the addition of phosphate esters and lanolin fatty acids have insufficient rinsing effects; Even when a fatty acid is added, the cationic activator that does not meet the conditions of this invention (No. 4) still has insufficient rinsing effect and smooth feeling. In contrast, cationic activators, phosphate esters,
The combination of lanolin fatty acids that satisfies the conditions of this invention (No. 5) has excellent rinsing effect and smooth feeling, and has a small coefficient of static friction. Example 2 In order to further examine the influence of phosphate ester,
Hair rinse compositions were prepared based on the formulation shown in Table 2 using five types of phosphoric acid esters with different numbers of moles of EO added while keeping the cationic activator constant.

[Table] As is clear from Table 2, even when phosphoric ester is used in combination with a cationic activator, the EO of phosphoric ester
If the number of moles added is outside the conditions of this invention, that is, the range of 4 to 20 (Nos. 6 and 10), only unsatisfactory results can be obtained in at least one of the rinsing effect and the smooth feeling. When the following conditions are met (Nos. 7 to 9), an excellent rinsing effect and smooth feeling can be obtained, and the coefficient of static friction is also small. Example 3 In order to examine the effects of the blending amounts and blending ratios of the cation activator, phosphoric acid ester, and lanolin fatty acid, 17 hair rinse compositions were prepared based on the blending composition shown in Table 3, and their performance was tested. .

【table】

[Table] According to Table 3, when the amount of the cation activator added is less than the specified amount of this invention (No. 11) or more than the amount specified in this invention (No. 18), or the amount of phosphoric acid ester or lanolin fatty acid added If the amount is less than the specified amount of this invention (Nos. 12 and 13), a satisfactory smooth feeling cannot be obtained. Furthermore, even if the amounts of the cationic activator, phosphoric ester, and lanolin fatty acid satisfy the conditions of this invention, cationic activator/(phosphoric ester +
If lanolin fatty acid) is not equal to 1/(0.2 to 0.7) (No. 16, 17, 19, 27), a satisfactory smooth feeling cannot be obtained. Furthermore, the ratio of phosphoric acid ester to lanolin fatty acid
A product outside the range of 0.25 to 4 (No. 23) also has an excellent rinsing effect, but cannot provide a smooth feeling. On the other hand, those whose three essential components satisfy the invention conditions (Nos. 14, 15, 20, 21, 22, 24, 25,
26), it can provide an excellent rinsing effect with a smooth feeling and a low coefficient of static friction. Example 4 A hair rinse agent was prepared based on the typical composition of the present invention shown in Table 4. When used on hair after shampooing in a conventional manner, a satisfactory rinsing effect and smooth feeling could be obtained.

[Table] In all of the above examples, C ₁₈ H ₃₇ was used for the A component and C ₉ was used for the B component, but the results of experiments with other components are also shown as examples that have the same effect. It is shown in Table 5.

【table】

Claims (1)

[Claims] 1. General formula (However, in the formula, R ₁ , R ₂ , R ₃ , and R ₄ are all alkyl groups, and at least two of them are C ₈ to C ₂₂ alkyl groups. X is a halogen atom or an alkyl group with 1 to 2 carbon atoms. 0.4 to 10% by weight of quaternary ammonium salt A represented by an alkyl sulfate group) and polyoxyethylene alkyl phenyl ether phosphate B (however, the chain length of the alkyl group is C ₄ to ₂₀ , the number of moles of EO added) is 4 to 20, and contains 0.1% by weight or more and 0.1% by weight or more of lanolin fatty acid C as essential components, and between these components A/(B+C). =1/0.2~0.7, B/C=0.25~
A hair rinse composition characterized by satisfying the relational expression 4/1.