JPH0231048B2 - KANONSEIMOHATSUHATSUSHOKUZAI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a temperature-sensitive hair coloring agent that is used by applying to hair and develops color in a desired temperature range.

Prior Art and Problems Generally, three types of hair dyes are used to color hair: vegetable, mineral, and synthetic organic chemicals.

All of these methods require complicated hair dyeing work, and once dyed, they not only are not easy to bleach, but also have the disadvantage that they tend to damage the hair. Furthermore, once dyed, the color remains the same all the time, and color recovery and color development cannot be expected.

Also, unlike hair dyeing, there is a method of temporarily attaching a coloring agent to the hair for decoration purposes (color rinse), but this method uses an acidic aqueous solution of tartaric acid or citric acid to color the hair. Not only is it difficult to restore the color because the hair must be bleached, but it also has the drawback of significantly damaging the hair. Also, like hair dye, it does not have the ability to develop or restore color depending on the environment.

Means for Solving the ProblemsThe present invention eliminates each of the problems in the conventional examples described above, allows a desired color to be easily and quickly developed in a desired temperature range, and can be easily applied without damaging the hair. The purpose of the present invention is to provide a temperature-sensitive hair coloring agent that can be used as a hair coloring agent and that can be easily restored. A temperature-sensitive hair coloring agent is prepared by mixing liquid crystal with a hair styling agent to achieve the above object.

Effects The present invention can be easily used by simply applying it with a comb or spatula, similar to using hair styling products such as pomade, and can perform temperature-sensitive color development and color recovery in a desired temperature range. For example, it is possible to maintain the natural black color of hair outdoors, while promoting natural color development indoors. In addition, it can have the above-mentioned coloring and color restoring functions and also function as a hair styling product.

In addition, unlike conventional methods, it does not damage the skin or hair, does not require pre-treatment such as bleaching the hair, and can be easily used by the user, and the treatment can be performed simply and quickly.

Example Examples of the present invention will be described below.

As described above, the present invention takes advantage of the characteristic of liquid crystals that develop temperature-sensitive color when a desired temperature range is reached, and forms a temperature-sensitive hair coloring agent by mixing temperature-sensitive liquid crystals and hair styling products.

Various cholesteric liquid crystals (derivatives of cholesterol) are used as the temperature-sensitive liquid crystal. The cholesteric liquid crystal consists of 3 pieces of cholesteric liquid crystal.
By blending ~7 types, the temperature range and temperature width of various color development can be adjusted.

A specific example of the formulation is as follows.

1st formulation example (weight ratio) Cholesteryl nonanoate 59% Cholesteryl oleyl carbonate 4% Cholesteryl butyrate 17% Cholesteryl linoleate 20% Coloring temperature 23→31℃ 2nd formulation example Cholesteryl oleate 81% Cholesteryl propionate 19% Coloring temperature 25→30℃ 3 formulation examples Cholesteryl nonanoate 70% Cholesteryl oleyl carbonate 5% Cholesteryl butyrate 20% Cholesteryl linoleate 25% Color development temperature 20→27℃ In addition to the above, cholesteric liquid crystals include cholesteryl octanoate, cholesteryl decanoate, cholesteryl acetate, cholesteryl chloride, cholesteryl bromide,
Cholesteryl isostearyl carbonate and the like are listed, and these are appropriately blended and used.

Next, an antioxidant is added to the cholesteric liquid crystal compounded according to the above formulation example to increase durability.

Furthermore, in order to maintain the color development of the cholesteric liquid crystal for a long time, it is necessary to protect the liquid crystal from chemical contamination (crystallization, oxidation) and physical damage. Emulsify it to a size of ~20 μm, add an aqueous gum arabic solution, adjust the pH and temperature to cause a physicochemical phenomenon called phase separation, and form a gelatin film around the liquid crystal droplets to encapsulate them. do.

Next, the encapsulated cholesteric liquid crystal is reacted with a small amount of glutaraldehyde at a temperature of 10° C. or less for a certain period of time, and then aged for about one week to obtain a temperature-sensitive liquid crystal microcapsule slurry.

The components of this slurry are as follows.

Liquid crystal content 22% (weight ratio) Wall material content 3% Moisture 75% Slurry PH 4.5-5.0 The above slurry becomes red, red,
Develops green and blue colors.

Furthermore, the temperature-sensitive liquid crystal microcapsule slurry is filtered to remove about 50% of the water content, and this is mixed with a hair styling product such as a pomade described later to obtain the desired coloring agent.

The above mixing ratio is Temperature-sensitive liquid crystal microcapsule slurry: Hair conditioner = 30-70: 70-30 The ratio is preferably about 50:50.

On the other hand, the hair styling product to be mixed with the temperature-sensitive liquid crystal microcapsule slurry is a pomade that has normal viscosity and normal humidity for hair, such as a pomade (using the pomade itself or its main component), preferably a pomade that has aqueous properties. is cited as a representative example.

The components of the pomade are as follows.

vegetable pomade Castor oil, Japanese oak, fragrance, antioxidants.

Mineral pomade Vaseline, paraffin, liquid paraffin, fragrance.

In addition to pomade, ticks containing beeswax, castor oil, Japanese wax, and fragrance can also be used.
Furthermore, it is also possible to apply hair creams containing beeswax, liquid paraffin, stearic acid, surfactants, fragrances, preservatives, antioxidants, and purified water.

These pomades, ticks, and hair creams have oils and fats (petrolatum, castor oil, liquid paraffin, etc.) as their main ingredients, and these main ingredients are mixed with the temperature-sensitive liquid crystal microcapsule slurry, as well as various other oils and fats and temperature-sensitive liquid crystals. It may also be composed by a mixture with a microcapsule slurry.

The temperature-sensitive hair coloring agent obtained as described above has a property of developing color in a predetermined temperature range when the background is black, that is, black hair. Therefore, the coloring agent was created by taking advantage of the fact that hair is black.

When pomade or the like is used as a hair styling product mixed with temperature-sensitive liquid crystal, it is sufficient to simply apply an appropriate amount to the hair with a comb or spatula and stretch it out. In addition, when using the chick as a hair conditioner, it may be applied directly.

Effects of the Invention As explained above, the temperature-sensitive hair coloring agent according to the present invention can be used in the same way as hair styling products such as pomade.
It can be easily used by simply applying it to the hair using a comb or spatula, and it can perform temperature-sensitive color development and color restoration (black hair color) in the desired temperature range. It can be maintained and promote natural color development indoors. In addition, it can have the above-mentioned coloring and restoring functions and also function as a hair styling product.

In addition, unlike conventional methods, this method does not damage the skin or hair, does not require preliminary treatment such as bleaching the hair, and can be easily used by the user, and has the advantage that the treatment can be performed simply and quickly.

Claims (1)

[Scope of Claims] 1. A temperature-sensitive hair coloring agent made by mixing a temperature-sensitive liquid crystal and a hair styling agent. 2. The temperature-sensitive hair coloring agent according to claim 1, which is obtained by mixing the temperature-sensitive liquid crystal and the hair styling product in a ratio of 30 to 70:70 to 30.