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Hair shaping agent
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A technology for deformation treatment and hair treatment, which is used in hair care, pharmaceutical formulations, cosmetic preparations, etc.
Inactive Publication Date: 2017-08-01
KAO CORP
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Abstract
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However, in methods using formaldehyde, which is more toxic, due to its high volatility, it has to be handled with care and is by no means the preferred method of hair treatment
Method used
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Synthetic example 1
[0119] Synthesis Example 1: Synthesis of Mixture 1
[0120] 5.0 g of resorcinol was dissolved in 21.0 g of water, and neutralized with 7.64 g of 48 mass % sodium hydroxide aqueous solution (this was made liquid a). Separately, 1.39 g of glyoxylic acid monohydrate was dissolved in 24.3 g of water, and neutralized with 1.22 g of a 48% by mass sodium hydroxide aqueous solution (this was referred to as liquid b).
[0121] Mix liquid a and liquid b, heat to 80° C. under nitrogen, and heat for 45 minutes. After the heating was completed, it was cooled in an ice bath, and 22.6 g of sulfuric acid was slowly added to adjust the pH to about 8.
[0122] Next, the solution was transferred to a separatory funnel, and washed twice with 50 mL of ethyl acetate. Thereafter, 3.7 g of sulfuric acid was added to the water layer to adjust the pH to 1 or less.
[0123] Thereafter, extraction was performed twice with 50 mL of ethyl acetate. The ethyl acetate layer was dehydrated with anhydrous sod...
Embodiment 1～4、 comparative example 1～2
[0151] The treatment agents shown in Table 1 were prepared, and the following three stages of hair treatment were performed, and the respective shape imparting effects were evaluated. The results are shown in Table 1 together. In addition, the pH value of each composition was measured directly with the composition after preparation with the pH meter (manufactured by HORIBA / model number: F-52) at room temperature (25 degreeC).
[0152]
[0153] 1. Wet 0.5 g of Caucasian straight hair with a length of 25 cm in 30° C. tap water for 30 seconds, wind the wet hair bundle around a plastic curling iron with a diameter of 14 mm, and fix it with a hair clip.
[0154] 2. Apply 1 g of the treatment agent to the hair tress wound around the curling iron, wrap and seal with a plastic wrap, and heat in an oven set at 90° C. for 1 hour.
[0155] 3. Take the tress out of the oven and allow it to return to room temperature.
[0156] 4. The hair bundle was removed from the curling iron, rinse...
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Abstract
This hair shaping agent contains (A) a compound represented by formula (1), and (B) water. In formula (1), R1, R2, and R3 represent H or a group represented by formula (2); thereamong, 0 to 2 are H. In formula (2), R represents H or a carboxy group, and A1 and A2 represent H, OH, or a group represented by formula (3). In formula (3), one of X, Y, and X represents the bonding site of the C in formula (2), and the remainders represent H or -CH(OH)COOH.
Description
technical field [0001] The present invention relates to a hair deforming agent capable of semi-permanently or permanently deforming the shape of hair. Background technique [0002] As a method for semi-permanently or permanently deforming the shape of the hair, there is a method of using a reducing agent such as a perm, or using a strong alkali with a pH of 12 to 14 represented by an alkaline relaxer. method of treatment. However, these methods are known to place a large burden on the hair, and it is known that loss tends to remain in the hair. In addition, in recent years, as a method of semi-permanently or permanently deforming the shape of hair with little damage to the hair, a curly hair stretching method using a large amount of formaldehyde has also been developed. However, in the method using formaldehyde, which is highly toxic, it must be handled with care due to its high volatility, and is by no means a preferred hair treatment method. [0003] Therefore, a treatm...
Claims
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