JPS6136488B2 - - Google Patents

Description

[Detailed description of the invention]

This invention relates to a hair treatment agent with excellent conditioning properties that is used before and after shampooing. Hair treatment agents used before and after shampooing include (a) replenishing the lipids removed from the hair by shampooing and providing nutrition to the hair, and (b) forming an oily film on the hair surface to give it shine. It is necessary to satisfy requirements such as (c) protecting the hair from mechanical forces such as brushing, and (d) giving the hair a moisturized feel, and it has been difficult to achieve this purpose in the past. Contains various oily ingredients. However, such hair treatment agents have the disadvantage that many of the oil-based ingredients tend to be washed away during the shampooing, rinsing, etc. process, and when oil-based ingredients with a high melting point are added to prevent hair loss, an oily film may be formed. Problems arise such as the hair is difficult to dry, the texture of the hair is poor after drying, and the hair does not have a moist feel. Furthermore, even with the hair protection effect mentioned in item (c), the reality is that it is not fully exerted because a considerable amount of oil is inevitably washed away during rinsing and the like. The present invention aims to improve the above-mentioned situation by providing a hair treatment agent with excellent conditioning properties.
0.05~5% (hereinafter, % is based on weight), carbon number 12~
18 fatty acid salts 0.1-5%, and oily components 10-50%
%. The cationic polymer contained in the hair treatment agent of this invention forms a complex salt with the fatty acid salt contained at the same time, and this complex salt exhibits excellent conditioning properties. In order for this effect to actually occur, a minimum amount of 0.05% of the cationized polymer is required. In addition, if a large amount of cationic polymer is blended into a hair treatment agent, the viscosity of the system will increase significantly, giving the hair a sticky feeling and a feeling of residual roughness of the polymer, impairing the feeling of use as a hair treatment agent. Therefore, the upper limit of the blending amount is 5%. The cationized polymer used in this invention is
General water-soluble cationized polymers may be used, such as cationized polyvinylpyrrolidone, cationized acrylic resin, cationized cellulose, and cationized starch, and these can be mixed in any combination. To further explain the latter two, cationized cellulose refers to ordinary hydroxyethyl cellulose, that is, the degree of polymerization of the glycose ring is 100 to 20,000, the number of moles of ethylene oxide added per glucose unit is 1 to 3, preferably
It is derived from 1.5 to 2.5 hydroxyethyl cellulose by a cationization reaction with a nitrogen compound, especially with a quaternary nitrogen content of 0.5 to 3.0.
% is preferred. Typical product names include Union Carbide Polymer JR-125;
There are polymer JR-400, polymer JR-30M, etc. In addition, cationized starch refers to glycidyl trialkylammonium halide, 3-halogen-2-
It refers to a compound with a nitrogen content of 1 to 5°C obtained by cationizing starch with a cationizing agent such as hydroxypropyl trialkylammonium. It is also possible to use a compound with a tertiary amine hydrochloride added thereto. Next, the fatty acid salt that is blended with the above-mentioned cationized polymer to create the composite salt is adjusted to the number of carbon atoms in the fatty acid in order to eliminate the squeakiness of the hair during shampooing and rinsing, and to satisfy conditioning properties. There are certain restrictions, and in this invention, the number of carbon atoms
It is necessary to choose from 12 to 18, namely lauric acid, tridecylic acid, myristic acid, pentadecylic acid, palmitic acid, heptadecylic acid, stearic acid. In addition, as a counter ion,
In addition to metals such as sodium and potassium, amines such as triethanolamine (TEA for short) can be used. These fatty acid salts are generally known as anionic activators, and one or more of them are used in the present invention, but since they form a complex salt with the cationized polymer, the amount of the fatty acid salts used as anionic activators is limited. Compared to conventional methods, it has the advantage of requiring only a small amount. However, in order to solubilize triglyceride, silicone oil, etc., which are known as oily components that are difficult to emulsify, it is necessary to secure a certain amount of blending. Mixing amount 0.1~5%
Established. It should be noted that there is no problem in using the above-mentioned fatty acid salt together with a nonionic surfactant within a generally known range. As mentioned above, the oily component, which is another essential ingredient in this invention, is also contained in conventional hair treatment agents, and the type of oily component is the same. That is, oily components selected from hydrocarbons, higher alcohols, fatty acid esters, glycerides, fatty acids, etc. are used alone or in appropriate combinations, and the appropriate amount is in the range of 10 to 50%. If it is less than 10%, the amount of oily ingredients remaining in the hair will be small, and the hair finishing effect will not be obtained.
Even if it exceeds 50%, it is not economically meaningful because the hair finishing effect will not be noticeably improved by the increased amount. In addition to the above-mentioned essential ingredients, the hair treatment agent of the present invention may contain conventional ingredients such as glycerin, perfume, and pigment as appropriate. According to the hair treatment agent of the present invention, a complex salt consisting of a cationized polymer and a fatty acid salt adheres to the hair together with an oily component, and forms a film on the surface that is difficult to wash away even with shampoo or rinsing. In addition to providing nutrition, the emollient effect of the complex salt can provide the following important effects. That is, the squeaking of the hair during shampooing and rinsing is prevented, the hair becomes easier to tangle, and a non-sticky, moist and soft hair finish is obtained. Moreover, in addition to this conditioning effect, the hair protection effect is reliably improved, and even when mechanical force is applied during brushing or the like, the hair will not be damaged. Hereinafter, the effects of this invention will be specifically explained based on Examples. The compositions shown in Tables 1 to 5 were emulsified at 60°C,
In addition to examining the viscosity of the emulsion obtained,
15 g of the product was applied to 100 g of hair to evaluate the degree of squeakiness of the hair during rinsing after shampooing and the conditioning effect on the hair after drying. The evaluation criteria are as follows. Squeaky feeling when rinsing shampoo 〇: None △: Slightly ×: Yes Easy to manage hair, softness, moist feeling, sticky feeling after finishing 〇: Better than standard product (experiment No. 21). △: Same as standard product ×: Inferior to standard product Product viscosity low: Viscosity is too low Good: Creamy moderate viscosity High: Viscosity is too high

[Table] Table 1 shows the effect of the blending amount on the performance of hair treatment agents when fatty acid salts are used as emulsifiers in combination with nonionic active agents. The blending conditions are constant. According to this, even if the number of carbon atoms in the fatty acid salts is the same,
In the case of No. 1 with too little amount or No. 4 with too much, No. 2 and No. 3 that satisfy the conditions of this invention.
The performance is clearly degraded compared to .

[Table] In Table 2, the blending conditions of the oil component, additives, cationized polymer, and nonionic active agent as an emulsifier are all the same. The difference is in the fatty acid salt used in combination with the nonionic active agent, and we looked at the effect that the number of carbon atoms has on the performance of the hair treatment agent. If the number of carbon atoms is outside the conditions of this invention,
It is clear that the performance of the hair treatment agent deteriorates as shown in No. 8 and No. 9.

[Table] Table 3 shows how the performance of the hair treatment agent changes depending on the amount of cationized polymer blended when a fatty acid salt is blended alone as an emulsifier. It is clear that if the amount of cationized polymer blended is zero in No. 10 or in No. 13 where the amount is excessive, the performance of the hair treatment agent will deteriorate.

【table】

[Table] Table 4 shows how the amount of oily ingredients blended was slightly changed, and the amount of cationic polymer blended was increased (twice) from Table 2, and hair treatment was performed from both the type and amount of emulsifier. This study investigated the effect on the performance of the agent. According to this, in No. 14 where the amount of fatty acid salt as an emulsifier is zero, No. 17 where it is excessive, and No. 18 and No. 19 where the number of carbon atoms exceeds the conditions of this invention, The performance of the hair treatment agent has deteriorated.

【table】

[Table] Experiments No. 21 to 27 in Table 5 contain emulsifiers, oily components,
When the blending conditions of the cationized polymer are changed while keeping the blending conditions of the additives constant, if the blending amount is zero in No. 21, or in No. 24 and No. 27 with an excessive amount,
It can be seen that the performance of the hair treatment agent deteriorates. Comparisons between No. 22 and No. 25, and between No. 23 and No. 26 show that the type of cationic polymer does not essentially affect the performance of the hair treatment agent if the blending amount is the same. it is obvious. Experiment Nos. 28 and 29 in Table 5 show cases in which no oily component is included, and in both cases, complex salts of cationized polymers and fatty acid salts precipitate, making it completely impossible to use them as hair treatment agents. . From the results shown in Tables 1 to 5 above, it is clear that the hair treatment agent of the present invention is mainly excellent in conditioning properties. In addition, the effect of protecting hair from mechanical forces such as brushing was examined by brushing the hair rated No. 10 and No. 11 with a nylon brush to reduce split ends and cut hair on 100 hairs. After calculating the number and investigating the incidence rate, we found that this invention
A remarkable hair protection effect was observed in the hair treated with No. 11.

[Brief explanation of the drawing]

The drawings show the hair protection effect during brushing in comparison between a hair treatment agent according to an embodiment of the present invention and a hair treatment agent of a comparative example.

Claims (1)

[Claims] 1 Cationized polymer 0.05-5% by weight, number of carbon atoms
A hair treatment agent characterized by containing 0.1 to 5% by weight of a 12 to 18 fatty acid salt and 10 to 50% by weight of an oily component.