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Organosilicon modified sarcosine and preparation method thereof

A sarcosine and organosilicon technology, applied in the field of novel organosilicon modified sarcosine and its preparation, can solve the problems affecting the application range and the like, achieve high surface activity, simple and not troublesome preparation process, and low preparation cost Effect

Pending Publication Date: 2022-06-24
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing modified sarcosine is mainly modified by alkanes. Since its surface activity is 29mN / m, which affects its application range, it is necessary to develop a modified sarcosine with high surface activity.

Method used

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  • Organosilicon modified sarcosine and preparation method thereof
  • Organosilicon modified sarcosine and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of 2-hydroxy-3-allyloxysarcosine sodium salt

[0024] In the reaction kettle, add 8.9Kg (100mol) of sarcosine, the concentration is 40Kg (100mol) of sodium hydroxide solution of 10wt%, and 10kg of deionized water, stir and neutralize into sarcosine sodium salt, then weigh allyl Glycidyl ether 11.4Kg (100mol) was added dropwise to the reaction kettle at 30°C for 0.5h. After the dropwise addition, the reaction was continued for 10h. Allyloxysarcosine sodium salt 22.05kg (98mol).

[0025] (2) Preparation of organosilicon-modified sarcosine

[0026] Add the above-mentioned 2-hydroxy-3-allyloxy sarcosine sodium salt 11.25Kg (50mol), 11.1Kg of 1,1,1,3,5,5,5-heptamethyltrisiloxane into the reaction kettle (50mol), and 20ppm of chloroplatinic acid catalyst, using methanol as a solvent, react at reflux temperature for 2h, steam the solvent methanol to obtain 22.35Kg (50mol) of organosilicon modified sarcosine.

[0027] The lowest surface tension of its aqueous...

Embodiment 2

[0029] (1) Preparation of 2-hydroxy-3-allyloxysarcosine sodium salt

[0030] In the reaction kettle, add 8.9Kg (100mol) of sarcosine, the concentration is 10Kg (100mol) of sodium hydroxide solution of 40wt%, and 30kg of deionized water, stir and neutralize into sarcosine sodium salt, and then weigh allyl Glycidyl ether 11.4Kg (100mol) was added dropwise to the reaction kettle at 60°C for 2h. After the dropwise addition, the reaction was continued for 1h. After the reaction was completed, the water was distilled off under reduced pressure to obtain 2-hydroxy-3-ene. Propoxysarcosine sodium salt 22.3kg (99mol).

[0031] (2) Preparation of organosilicon-modified sarcosine

[0032] Add the above-mentioned 2-hydroxy-3-allyloxy sarcosine sodium salt 11.25Kg (50mol), 11.1Kg of 1,1,1,3,5,5,5-heptamethyltrisiloxane into the reaction kettle (50mol), and 40ppm of chloroplatinic acid catalyst, using ethanol as a solvent, reacted at reflux temperature for 30h, and steamed the solvent etha...

Embodiment 3

[0035] (1) Preparation of 2-hydroxy-3-allyloxysarcosine sodium salt

[0036] In the reactor, add 8.9Kg (100mol) of sarcosine, the concentration is 20Kg (100mol) of sodium hydroxide solution of 20wt%, and 30kg of deionized water, stir and neutralize into sarcosine sodium salt, then weigh allyl Glycidyl ether 11.4Kg (100mol) was added dropwise to the reaction kettle at 40°C for 1 hour. After the dropwise addition was completed, the reaction was continued for 5 hours. After the reaction was completed, the water was distilled off under reduced pressure to obtain 2-hydroxy-3-ene. Propoxysarcosine sodium salt 21.8kg (97mol).

[0037] (2) Preparation of organosilicon-modified sarcosine

[0038] Add the above-mentioned 2-hydroxy-3-allyloxy sarcosine sodium salt 11.25Kg (50mol), 11.1Kg of 1,1,1,3,5,5,5-heptamethyltrisiloxane into the reaction kettle (50mol), and 100ppm of Karstedt catalyst, using propanol as solvent, react at reflux temperature for 10h, steam out solvent propanol to ...

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Abstract

The preparation method comprises the following steps: adding an aqueous solution of sarcosine into a sodium hydroxide solution while stirring, dropwise adding allyl glycidyl ether into a reaction system at a certain temperature, continuing to react for a certain time after dropwise adding, and after the reaction is finished, carrying out reduced pressure distillation on the obtained solution to obtain the organic silicon modified sarcosine. The 2-hydroxyl-3-allyloxy sarcosine sodium salt is obtained after the reaction is completed; the preparation method comprises the following steps: adding 2-hydroxy-3-allyloxy sarcosine sodium salt, 1, 1, 1, 3, 5, 5, 5-heptamethyltrisiloxane and a catalyst into a reaction kettle, carrying out reflux reaction for a period of time in the presence of a low-carbon alcohol solvent, and after the reaction is completed, evaporating to remove the low-carbon alcohol solvent, thereby obtaining the organic silicon modified sarcosine. Compared with the existing alkane modified sarcosine, the organic silicon modified sarcosine has higher surface activity, the preparation process is simple and not vexous, the cost is low, the requirements of industrial large-scale production can be met, and the organic silicon modified sarcosine is applied to the fields of cosmetics, biotechnology, medicine and the like.

Description

technical field [0001] The invention belongs to the technical field of chemistry and chemical industry, and in particular relates to a novel organosilicon modified sarcosine and a preparation method thereof. Background technique [0002] Silicone surfactants have low surface tension, good spreading and wetting properties, and thermal stability, making them widely used in polyurethane foam products, textiles, paints and coatings, cosmetics, and pesticides. Chinese patent CN103585926 synthesized an acid and alkali resistant polyether modified trisiloxane surfactant; Chinese patent CN104610338A synthesized a trisaccharide amido tetrasiloxane surfactant and studied its surface activity and aggregation properties. [0003] Sarcosine is one of the amino acids. It is widely used in food, industry, cosmetics and other fields because of its good fatigue recovery performance, dye stability performance, and improvement of mental development. Due to its good hydrophilicity, sarcosine c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/08C09K23/54C09K23/28
CPCC07F7/0838C07F7/0879
Inventor 曾小君赖鑫杨鑫然刘思莹马丹丹刘雷
Owner CHANGSHU INSTITUTE OF TECHNOLOGY