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A kind of synergist for hair dyeing and its preparation and application

A synergist and acid-binding agent technology, applied in the field of synergists for hair dyeing, can solve the problems of formula application hindrance, unpleasant smell, etc., achieve permanent hair dyeing effect, avoid unpleasant smell, and novel structure

Active Publication Date: 2018-11-27
中国中化股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to allow the dye to enter the hair better, Pera uses mercapto-containing reagents such as thioglycolic acid and cysteine ​​(structural formula as shown below) to act on the hair, which can open the hair scales on the surface of the hair and make the dye and hair Better binding, improved dyeing results, but unfortunately the formulation is somewhat hindered in application due to the unpleasant odor of thioglycolic acid and cysteine

Method used

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  • A kind of synergist for hair dyeing and its preparation and application
  • A kind of synergist for hair dyeing and its preparation and application
  • A kind of synergist for hair dyeing and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] At room temperature, dissolve 14.3g (0.1mol) of sodium cysteine ​​in 100ml of water, cool it below 0°C with an ice-water bath, add dropwise 12.4g (0.11mol) of chloroacetyl chloride, and dropwise add a mass fraction of 17.6% 30ml of sodium carbonate solution (0.05mol), maintain the pH between 7-8, dropwise for about 30min, after the dropwise addition, stir and react for 3h, then warm up to room temperature, gradually add thiourea 7.6g (0.1mol), After 10 min of addition, continue stirring for 12 h, filter the precipitated white solid powder, wash with 100 ml of water, and dry to obtain 21.2 g of 2-[2-(thioureido)acetamido]-3-mercaptopropionic acid, yield 89.4% . 1H-NMR (400MHz, CDCl 3 )δ:1.5(1H,s),2.93-3.18(2H,m),3.76(2H,m),4.78(1H,m),8.32(1H,s),9.27-9.29(3H,m),12.57 (1H,s).

[0037] Weigh 23.6g (0.1mol) of 2-[2-(thioureido)acetamido]-3-mercaptopropionic acid, add 200ml of water, and add 17.1g (0.1mol) of barium hydroxide, heat to 50-60°C , hydrolyzed for 3h, and then...

Embodiment 2

[0039] Dissolve 143g (1mol) sodium cysteine ​​in 1L of water, cool to 0-5°C with an ice-water bath, add dropwise 271g (1.2mol) chloroacetyl chloride, and simultaneously add dropwise 300ml of sodium carbonate solution with a mass fraction of 17.6% ( 0.5mol), keep the pH between 7-8, the dropwise addition time is about 5h, stir the reaction for 3h after the dropwise addition is completed, then warm up to room temperature, gradually add thiourea 91.2g (1.2mol), 2h after adding, continue to stir After 12 hours, the precipitated white solid powder was filtered, washed with 1 L of water, and dried to obtain 215.7 g of 2-[2-(thioureido)acetamido]-3-mercaptopropionic acid, with a yield of 91%. 1H-NMR (400MHz, CDCl 3 )δ:1.5(1H,s),2.93-3.18(2H,m),3.76(2H,m),4.78(1H,m),8.32(1H,s),9.27-9.29(3H,m),12.57 (1H,s).

[0040] Weigh 236g (1mol) of 2-[2-(thioureido)acetamido]-3-mercaptopropionic acid, add 2L of water, and add 171g (1mol) of barium hydroxide, heat to 60-70°C, hydrolyze for 4h, A...

Embodiment 3

[0052] Formulate the synergist and dye according to the following table (see Table 3) to obtain the corresponding hair dye.

[0053] table 3

[0054]

[0055]

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Abstract

The invention belongs to the technical field of cosmetic industry, and in particular relates to a hair dyeing synergist as well as preparation and applications of the hair dyeing synergist. The structural formula of the synergist is shown as the formula I, and the synergist is used in hair dyes, and taken as the hair dyeing synergist. The hair dyeing synergist has the advantages that the compound structure is novel, a synthetic process is simple, the synergist can be bonded with the hair dyes, has the function of opening hair squama, and can bring hair dye molecules into the hair squama, so that the dyeing ability of the hair dyes is enhanced. The application of the hair dyeing synergist is not limited to one certain dye, but the hair dyeing synergist can be widely applied to various dyes and mixed with the various dyes to form the hair dyes. The formula I is shown in the description.

Description

technical field [0001] The invention belongs to the technical field of cosmetics industry, in particular to a synergist for hair dyeing and its preparation and application. Background technique [0002] With the continuous improvement of people's living standards, people pay more and more attention to their appearance. For many young people to pursue fashion and for the elderly to cover up gray hair, hair dye has become an indispensable cosmetic product in people's lives. At present, there are a large number of hair dyes on the market, but according to testing, most hair dyes contain chemical agents harmful to human body, such as: oxidants, p-phenylenediamine, etc. According to reports, hair dye has become an important cause of contact dermatitis. Among contact dermatitis patients, 20% of the disease is caused by hair dye. Long-term exposure may also induce malignant diseases such as leukemia and skin cancer. Therefore hair dyeing has become a serious social problem. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K8/46A61Q5/10A61Q3/02C07C323/59C07C319/02
Inventor 白雪松李学敏王瑛林珑尉宏伟苗雨
Owner 中国中化股份有限公司
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