JPH0753876B2 - Cleaning composition - Google Patents

Description

TECHNICAL FIELD The present invention relates to a detergent composition.

[Prior Art] It is well known that excessive ultraviolet irradiation is extremely harmful to the skin. Keratin fibers such as hair and wool also undergo a chemical change under the influence of UV irradiation,
The excess may be lost or discoloration may occur to impair the texture of the fiber.

Therefore, in order to protect the skin and keratin fibers from ultraviolet rays, various ultraviolet absorbers have been incorporated into cosmetics and fiber treatment agents. Among them, urocanic acid and its derivatives have wavelengths
Well absorbs UV rays from 290 to 310 nm. In addition, urocanic acid is a natural moisturizing factor (NMF;
Since it is a member of the Natural Moisturizing Factor, it is more safe to the human body than other UV absorbers such as para-aminobenzoic acid derivatives and salicylic acid derivatives.

[Problems to be Solved by the Invention] As an example of blending urocanic acid and its derivative into a detergent composition, there is one using ethyl urocanic acid (JP-A-49-36834). However, when this ultraviolet absorber is used for a detergent such as shampoo which requires rinsing, it does not easily remain on the skin and keratin fibers after washing, and therefore, a sufficient ultraviolet absorbing effect is not exhibited.

[Means for Solving Problems] The present invention has been made in view of the above circumstances, and provides a detergent composition containing a urocanic acid salt and a quaternary nitrogen-containing water-soluble polymer.

Examples of the urocanic acid salt include alkali salts of urocanic acid such as sodium urocanate, potassium urocanate, and magnesium urocanate, and urocanic acid mineral salts such as urocanic acid hydrochloride, urocanic acid nitrate, and urocanic acid sulfate. The amount of the urocanic acid salt to be added is not particularly limited, but from the practical viewpoint, it is preferably added in an amount of 0.1% (% by weight, hereinafter the same) of the entire composition. If the amount is less than 0.1%, the effect may not be sufficiently exhibited.

Examples of the quaternary nitrogen-containing water-soluble polymer include quaternary nitrogen-containing cellulose ether, quaternary nitrogen-containing starch, and quaternary nitrogen-containing starch.
Examples thereof include quaternary nitrogen-containing polytrialkylaminoethyl methacrylate, quaternary nitrogen-containing polyvinylpyrrolidone, quaternary nitrogen-containing decomposed keratin, quaternary nitrogen-containing chitin and chitosan. Further, two or more kinds of these polymers may be mixed and used.

The molecular weight of these quaternary nitrogen-containing polymers is 2,000 to 3,000.
It is preferably 0,000, and the nitrogen content is preferably 0.2 to 5%.

The quaternary nitrogen-containing water-soluble polymer of the present invention can be obtained, for example, by reacting the water-soluble polymer with a quaternary nitrogen introducing agent. Here, as the water-soluble polymer, cellulose ether, starch, polyvinylpyrrolidone,
Examples thereof include trialkylaminoethyl methacrylate polymer. Further, as the quaternary nitrogen introducing agent, glycidyl trimethyl ammonium halide, 3-
Halo-2-hydroxypropyltrialkylammonium halide and the like.

The blending amount of these quaternary nitrogen-containing water-soluble polymers is not particularly limited, but from the practical viewpoint, it is 0.05% or more,
It is preferable to add 0.1 to 2%. If less than 0.05%, the effect may not be fully exerted.

Further, in addition to the above-mentioned components, the cleaning composition of the present invention may appropriately contain components depending on its type, purpose of use and the like. For example, anionic surfactant, cationic surfactant, amphoteric surfactant or nonionic surfactant, thickener, preservative, bactericide, emulsion, antioxidant, tonic agent, antidandruff agent, pigment, fragrance. 1 type or 2 types or more of these can be mix | blended. The present invention can be used as a cleansing agent for hair and skin in any form such as solid, paste, cream and liquid.

[Effects of the Invention] According to the present invention, even in a cleaning agent that requires rinsing, a cleaning agent composition in which an ultraviolet absorber is sufficiently left on the skin and keratin fibers to prevent damage to the skin and keratin fibers by ultraviolet rays is provided. can get.

[Examples] First, evaluation methods for various damage levels of hair tested in each example will be described. The present invention is not limited to the examples below.

Breaking strength of hair 1g of the cleaning composition is evenly sprayed on a 10g hair bundle, and the hair is rubbed at 40 ° C for 5
It was soaked in 00 ml of warm water for 10 seconds and rinsed twice. Then, the dried hair was irradiated with ultraviolet rays from a xenon lamp for 5 hours. After repeating the above process 20 times,
The hair was arbitrarily selected from the hair bundle, and the length was set to 2 cm.
Then, under the conditions of 25 ± 1 ℃ and 65% relative humidity, Tensilon UTM-11-20 (manufactured by Toyo Sokki Co., Ltd.) is used as a tensile strength meter, and the hair is pulled at a pulling speed of 40 mm / min and a maximum scale of 200 g, and then cut. The weight at that time was taken as the breaking speed of the hair. The breaking strength of the hair as the degree of damage to the hair was evaluated by the rate of change (1) with reference to that in the case of not irradiating with ultraviolet rays.

Change rate (%) = (average breaking strength of hair irradiated with ultraviolet rays / average breaking strength of hair not irradiated with ultraviolet rays) x 100 ... (1) dryness of hair bundles dryness is the breaking strength of hair As in the case of the measurement, the hair bundle that was washed with the sample and irradiated with ultraviolet rays 20 times was washed 20 times without being irradiated with ultraviolet light. It was sensory evaluated.

○: Equivalent to the standard △: A little inferior to the standard X: Inferior to the standard Fade degree of hair The same as when the breaking strength of the hair was measured, the color of the hair bundle irradiated with ultraviolet rays was judged by 20 judges. It was visually evaluated by. The evaluation of the color of the hair was based on the color of the hair that was not irradiated with ultraviolet rays, and was evaluated in the following three grades.

◯: Equal to the standard Δ: Slightly inferior to the standard X: Inferior to the standard Examples 1 to 7 and Comparative Examples 1 to 3 prepared 10 kinds of cleaning compositions with the composition shown in Table 1, After washing and drying, the damage of the hair irradiated with ultraviolet rays, that is, the change in the breaking strength of the hair, the dryness of the hair, and the degree of fading were evaluated by the above-mentioned method.

As is clear from the results shown in Table 1, the cleaning compositions of Examples 1 to 7 were evaluated as good in terms of changes in breaking strength of hair, dryness and discoloration. On the other hand, the detergent compositions of Comparative Examples 1 to 3 in which one or both of the urocanate and the quaternary nitrogen-containing polymer were not blended did not show any damage preventing effect from any of the test items.

Examples 8 and 9 Two types of cleaning compositions having the composition shown in Table 2 were prepared and treated in the same manner as in the above Examples, and then the degree of hair damage was evaluated.

As is clear from the results shown in Table 2, the detergent composition of the present invention was not affected by these components with respect to hair damage even when it was blended with other components such as fragrances and pigments. .

Claims (1)

[Claims] 1. A detergent composition containing urocanate and a quaternary nitrogen-containing water-soluble polymer.