JP6346502B2 - Hair treatment method and hair treatment agent - Google Patents

Description

  The present invention relates to a hair treatment method for treating hair coated with a predetermined hair treatment agent with a hair iron, and a hair treatment agent used in the hair treatment method.

  When performing a hair straightening process or a hair styling process, a hair iron having a function of heating hair may be used (for example, see Patent Document 1). In the curly hair straightening treatment, a hair iron is used in the operation of extending the hair after applying the first agent mixed with a reducing agent to the hair and then washing off the first agent. In hair styling treatment, for example, a hair iron is applied directly to the hair, or a hair iron is applied to the hair coated with a hair styling agent. When the hair is stretched in the above use, it is suitable to move the hair iron with the hair sandwiched in the length direction of the hair.

JP 2000-14438 A

By the way, when the fluidity of the hair treatment agent used by applying to hair is high, the applied hair treatment agent may sag from the hair. To prevent this dripping, we need you results lower the fluidity of the hair treatment agent. This also fluidity low to Rubeku hair treatment agent, additional mixing of the polymer compound obtained. Moreover, when performing a hair iron process with respect to the hair which apply | coated the hair treating agent, in order to make operativity of a hair iron favorable, it is desired to suppress the friction with hair and a hair iron low.

  In view of the above circumstances, the present invention provides a hair treatment method with good operability of this iron when applying a hair treatment agent containing a polymer, and the hair used in the method. The purpose is to provide a treatment agent.

  As a result of diligent study by the present inventors, if xanthan gum is selected as a polymer compound to be blended with the hair treatment agent set to prevent dripping, it has been found that hair treatment with good operability of the hair iron can be performed, The present invention has been completed.

  That is, the hair treatment method according to the present invention comprises a pretreatment step in which a hair treatment agent having a viscosity of 40 mPa · s or more and containing xanthan gum and water is applied to the hair, and the hair after the pretreatment step is applied to the hair iron And a post-processing step of moving the sandwiched hair iron after contacting the heating part.

  The hair treatment method according to the present invention preferably does not wash away the hair treatment agent applied in the pretreatment step between the pretreatment step and the posttreatment step. When the hair treatment agent is not washed off before the post-treatment step, the operability of the hair iron is likely to deteriorate depending on the polymer compound to be blended in the hair treatment agent, but if the polymer compound to be blended is xanthan gum, good operation Can be realized.

  The set temperature of the heating part of the hair iron in the post-processing step is, for example, 60 ° C. or higher.

  The blending amount of xanthan gum in the hair treatment agent in the pretreatment step is preferably 0.1% by mass or more and 2.0% by mass or less. If it is 0.1 mass% or more, the viscosity of a hair treating agent can be adjusted moderately, and if it is 2.0 mass% or less, it is suitable for making the touch of hair soft.

  In the movement of the hair iron in the post-processing step, for example, the hair may be stretched.

  The hair treatment agent according to the present invention has a viscosity of 40 mPa · s or more in which xanthan gum and water are blended, and is used in the pretreatment step of the hair treatment method of the present invention.

  According to the present invention, since a xanthan gum blend with a predetermined viscosity is used as a hair treatment agent applied to the hair before treatment with a hair iron, dripping of the hair treatment agent from the hair can be suppressed by setting the viscosity. As well as xanthan gum, the hair iron has good operability.

It is a perspective view of the example of the hair iron used with the hair processing method of this invention.

Based on an embodiment of the present invention, the present invention will be described below.
The hair treatment method of the present embodiment includes a pretreatment step of applying a predetermined hair treatment agent to the hair, and a posttreatment step of treating the hair with a hair iron.

(Pretreatment process)
The hair treatment agent used in the pretreatment step of the present embodiment has a viscosity equal to or higher than a predetermined value, and xanthan gum is blended with water (the blending amount of water in this hair treatment agent is, for example, 90 mass). % Or more.) Although the pH of this hair treatment agent is not specifically limited, For example, it is 2.0 or more and 8.0 or less.

  The hair treatment agent may be a liquid having a higher viscosity than water, and the viscosity of the hair treatment agent is 40 mPa · s or more. In order to suppress dripping from the hair, the viscosity is preferably 100 mPa · s or more, preferably 300 mPa · s or more, more preferably 500 mPa · s or more, and further preferably 1000 mPa · s or more. Although the upper limit of the viscosity of a hair treatment agent is not specifically limited, For example, it is 4000 mPa * s. Here, the value measured using the B-type viscometer is employ | adopted for the viscosity of a hair treatment agent. In this measurement, a rotor appropriately selected according to the viscosity is used, and the value after 60 seconds from the start of viscosity measurement is adopted under the conditions of a temperature of 25 ° C. and a rotor rotation speed of 30 rpm.

  As the xanthan gum to be blended in the hair treatment agent, for example, a 1.0% by mass aqueous solution of xanthan gum having a viscosity of 700 mPa · s to 1400 mPa · s is preferable. Here, the value measured using the B-type viscometer is employ | adopted for the viscosity of a 1.0 mass% xanthan gum aqueous solution. In this measurement, a rotor appropriately selected according to the viscosity is used, and the value after 60 seconds from the start of viscosity measurement is adopted under the conditions of a temperature of 25 ° C. and a rotor rotation speed of 30 rpm.

  The blending amount of xanthan gum in the hair treatment agent is, for example, from 0.1% by mass to 2.0% by mass, and preferably from 0.2% by mass to 1.0% by mass. When the compounding amount of xanthan gum is 0.1% by mass or more, it is suitable for increasing the viscosity of the hair treatment agent, and when the compounding amount is 2.0% by mass or less, it is treated by the hair treatment method of this embodiment. Suitable for soft hair.

  You may mix | blend raw materials other than xanthan gum and water arbitrarily with the hair treatment agent of this embodiment. The optional raw material is preferably selected from raw materials blended in known hair styling agents used when styling with a hair iron, such as surfactants (cationic surfactants, nonionic surfactants, etc.) Alcohol, lower alcohol, polyhydric alcohol, sugar, ester oil, fat and oil, fatty acid, hydrocarbon, wax, silicone, polymer compound, amino acid, animal and plant extract, microorganism-derived material, inorganic compound, fragrance, preservative, UV absorber Etc.

  In the pretreatment process of the present embodiment, the hair treatment agent is applied to the hair. The coating method at this time is not particularly limited.

(Post-processing process)
In the post-processing step of the present embodiment, the hair after applying the hair treatment agent in the pre-processing step is processed with a hair iron. The treatment target may be either wet hair or dry hair, but dry hair is preferred.

  As the hair iron used in the post-treatment process of the present embodiment, a known iron such as a hair iron for extending the hair shape and a hair iron for forming curly hair is used. JP-A-2000-14438, 2001-213741, JP-A-2012-239770, and JP-A-2013-233395 disclose known hair irons.

  FIG. 1 is a perspective view of an example of a hair iron used in the post-processing step of the present embodiment. This hair iron is used when the hair shape is extended, and includes a first lever 1 and a second lever 2 that is rotatably coupled between the first lever and the rear part. The first lever 1 has a grip portion 4 located at the center portion in the front-rear direction, a fulcrum portion 5 located at the rear portion, and a plate portion 6 located at the tip portion, and the second lever 2 is a first lever. 1 is the same form. The plate portion 6 of each of the first lever 1 and the second lever 2 is opposed to a heating portion H that is a heating element for heating the hair (the material of the heating portion H is a metal such as aluminum or titanium). Is provided.

  When treating the hair with a hair iron, the hair is put in contact with the heating part of the hair iron, and then the hair iron is moved while maintaining the state where the hair is held. Slide. For example, when hair is processed using the hair iron of FIG. 1, a hand is placed on the hair iron as indicated by a two-dot chain line, and the hair iron is moved after the hair is sandwiched between a pair of opposed heating portions H. The hair is slid between the heating parts H while stretching the hair. When sliding this hair, friction between the hair and the hair iron, which affects the operability of the hair iron, occurs, but since the application of the hair treatment agent containing xanthan gum is performed in the pretreatment step, The above friction is suppressed.

  The set temperature of the heating part in the hair iron when treating the hair in the post-treatment step is preferably 60 ° C. or higher, preferably 100 ° C. or higher, more preferably 140 ° C. or higher in order to efficiently deform the hair shape. 160 ° C. or higher is more preferable. On the other hand, the set temperature of the heating unit is preferably 230 ° C. or lower, preferably 210 ° C. or lower, more preferably 200 ° C. or lower, and even more preferably 190 ° C. or lower in order to suppress hair damage due to heating.

  The time during which the hair iron is in contact with the hair can be shortened when the temperature of the heating unit is set high, and becomes long when the temperature of the heating unit is set low. In order to deform the shape of the hair, the time is preferably 1 second or longer, preferably 2 seconds or longer, more preferably 3 seconds or longer, and still more preferably 4 seconds or longer. On the other hand, the above time is preferably 20 seconds or shorter, preferably 15 seconds or shorter, and more preferably 10 seconds or shorter, in order to suppress hair damage due to heating.

  The hair treatment method of this embodiment is as described above. In the hair treatment method, xanthan gum in the hair treatment agent in the pretreatment step is present on the hair surface in the posttreatment step. If xanthan gum is thus present on the hair surface, another step may be provided before the pretreatment step, between the pretreatment step and the posttreatment step, or after the posttreatment step. It is preferred that the hair treatment agent applied between the treatment step and the post-treatment step is not washed away from the hair.

  EXAMPLES Hereinafter, although this invention is explained in full detail based on an Example, this invention is not interpreted limitedly based on description of this Example.

(Hair treatment agent)
Xanthan gum (“Labor Gum GS-C” manufactured by DSP Gokyo Food & Chemical Co., Ltd.), polyvinyl pyrrolidone (“Lubicol K-30” manufactured by BASF Japan Ltd.) or hydroxypropyl starch phosphate (“Delica E-7” manufactured by Nissho Chemical Co., Ltd.) )) Was mixed with water to produce the hair treatment agents of Examples 1a to 1c and the hair treatment agents of Comparative Examples 1a to 1b having the same viscosity as that of Example 1a. Moreover, xanthan gum or polyvinylpyrrolidone was blended with water to produce hair treatment agents of Example 2, Comparative Examples 2a to 2b and Examples 3a to 3b.

(Hair treatment)
As a pre-treatment step, about 3 ml of the hair treatment agent of any of the above Examples 1a to 1c, Comparative Examples 1a to 1b, Example 2 and Comparative Examples 2a to 2b, a hair bundle (length) : About 25 cm, mass: about 2 g) and dried with warm air. Next, as a post-processing step, the temperature of the heating part of a hair iron (“ADST Premium DS Pro Straight Hair Iron ADST Premium DS (FDS-25)” manufactured by HAKKO CORPORATION) having a pair of metal plate-like heating parts is set. It was set to 180 ° C., and the hair bundle was sandwiched between the pair of heating parts and then slid while extending the hair bundle.

  In the hair treatment step, “feel of hair after pretreatment step (feel of hair after drying with warm air)”, “operability of hair iron”, and “feel of hair after posttreatment step” were evaluated. The evaluation method and evaluation criteria are as follows.

(Hair feel after pre-treatment process)
A standard hair bundle was set and evaluated as follows.
○: Softness equivalent to the standard ×: Slightly harder than the standard

(Hair iron operability)
While moving the hair iron from one end of the hair bundle to the other end while sandwiching the hair bundle between the pair of heating elements, the extent to which the hair bundle and the heating element of the hair iron felt friction was evaluated. In this evaluation, a standard hair bundle was set and evaluated as follows.
○: Smoothness equivalent to the standard ×: Feeling friction more clearly than the standard

(Hair feel after the post-treatment process)
A standard hair bundle was set and evaluated as follows.
○: Softness equivalent to the standard ×: Clearly harder than the standard

Table 1 below shows the blending amounts of the polymer compounds blended in the hair treatment agents of Examples 1a to 1c and Comparative Examples 1a to 1b and the evaluation results when these hair treatment agents are used.

  In Table 1 above, the “feel of the hair after the pretreatment process” and the “operability of the hair iron” were evaluated based on the hair bundles using the hair treatment agents of Examples 1a to 1c. In the evaluation of “feel of the hair after the pretreatment step”, the hair bundle using the hair treatment agent of Examples 1a to 1c is soft, and the hair bundle using the hair treatment agent of Comparative Examples 1a to 1b is slightly more. It was a hard touch. In the evaluation about “operability of the hair iron”, the hair bundles using the hair treatment agents of Examples 1a to 1c are smoother, and the hair bundle using the hair treatment agents of Comparative Examples 1a to 1b is obviously more frictional. I felt.

  The “feel of the hair after the post-treatment process” was evaluated in Table 1 based on the hair bundle using the hair treatment agents of Examples 1a to 1c. As a result, the hair bundles using the hair treatment agents of Examples 1a to 1c were soft, and the hair bundles using the hair treatment agents of Comparative Examples 1a to 1b were clearly harder. Moreover, as a result of comparing the feel between the three hair bundles using the hair treatment agents of Examples 1a to 1c, when the blending amount of xanthan gum was reduced, a tendency of excellent soft feel was recognized.

Table 2 below shows the blending amounts of the polymer compounds blended in the hair treatment agents of Example 2 and Comparative Examples 2a to 2b, and the evaluation results when these hair treatment agents are used.

  In Table 2 above, the evaluation was performed based on the hair bundle using the hair treatment agent of Example 2. In the evaluation of “feel of the hair after the pretreatment process”, the hair bundle using the hair treatment agent of Example 2 is soft, and the hair bundle using the hair treatment agent of Comparative Examples 2a to 2b is slightly harder. Met. In the evaluation of “operability of the hair iron”, the hair bundle using the hair treatment agent of Example 2 is smooth, and the hair bundle using the hair treatment agents of Comparative Examples 2a to 2b clearly feels friction. It was. Moreover, in evaluation about "feel of the hair after a post-processing process", the hair bundle using the hair treatment agent of Example 2 is soft, and the hair bundle using the hair treatment agent of Comparative Examples 2a-2b is clearer It was a hard touch.

Table 3 below shows the amount of xanthan gum blended in the hair treatment agents of Examples 3a to 3b and the viscosity of these hair treatment agents. The viscosities in Table 3 are recorded as values obtained by using a B-type viscometer manufactured by Tokimec Co., Ltd. at 25 ° C., a rotor appropriately selected according to the viscosity, a rotor rotation speed of 30 rpm, and 60 seconds after the start of measurement.

1 1st lever 2 2nd lever 4 grip part 5 fulcrum part 6 plate part H heating part

Claims (6)

A pretreatment step of applying a hair treatment agent having a viscosity of 40 mPa · s or more, xanthan gum and water, and a blending amount of water of 90% by mass or more to the hair;
After sandwiching the hair after the pretreatment step in contact with the heating portion of the hair iron, a post-treatment step of moving the sandwiched hair iron,
Characterized by comprising,
Between the pretreatment step and the posttreatment step, a hair treatment method in which the hair treatment agent applied in the pretreatment step is not washed away (however, at least one carboxylic acid represented by the following formula (I) and The thing provided with the pre-processing process which apply | coats the hair treatment agent containing the hydrate and / or its salt to hair on / or hair is remove | excluded.
R-CO-COOH Formula (I)
[Wherein, R is hydrogen, COOH, CN, optionally substituted C ₁ -C ₁₀ alkyl, optionally substituted C ₂ -C ₁₀ alkenyl, optionally substituted C ₂ -C ₁₀ alkynyl, optionally substituted C ₃ -C ₁₀ cycloalkyl, heteroaryl groups substituted C ₆ optionally -C ₁₀ aryl, and optionally substituted 5 to 10 membered ring, alkyl group optional substituents include halogen, hydroxyl, selected from amino and C ₁ -C ₄ alkoxy, optional substituents of other groups are halogen, hydroxyl, amino, C ₁ -C ₄ alkyl and C ₁ -C Selected from ₄ alkoxy. ]) The hair treatment method according to claim 1 , wherein a set temperature of a heating portion of the hair iron in the post-treatment step is 60 ° C. or higher. The hair treatment method according to claim 1 or 2 , wherein the amount of xanthan gum in the hair treatment agent in the pretreatment step is 0.1% by mass or more and 2.0% by mass or less. The hair treatment method according to any one of claims 1 to 3, wherein a pH of the hair treatment agent in the pretreatment step is 2.0 or more and 8.0 or less.   The hair treatment method according to any one of claims 1 to 4, wherein the hair is stretched in the movement of the hair iron in the post-treatment step. The hair treatment agent used in the pre-processing process of the hair treatment method of any one of Claims 1-5.