Preparation method of vinyl pyrrolidone-dimethylamino ethyl methacrylate copolymer

A technology of dimethylamino ethyl methacrylate and vinyl pyrrolidone is applied in the field of preparation of vinyl pyrrolidone-dimethylamino ethyl methacrylate copolymer, and can solve the problems of high toxicity of acetone, hydrolysis of molecular chain, unenvironmental protection, etc. problem, to achieve the effect of less toxicity, less side reaction products, and better cost

Inactive Publication Date: 2019-04-26
HUANGSHAN BONSUN PHARMA
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing preparation process, during the synthesis of vinylpyrrolidone-dimethylaminoethyl methacrylate copolymer, acetone or dichloromethane is usually used as a solvent in the reaction process. Acetone is highly toxic, not environmentally friendly, and harmful to the human body. Harmful; Not only that, in the existing preparation technology disclosed today, its product viscosity is in the range of 10000mPa.s~50000Pa.s, and sulfuric acid is usually added to terminate the react

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example one

[0019] A preparation method of vinylpyrrolidone-dimethylamino ethyl methacrylate copolymer, the difference is that the preparation method includes the following steps:

[0020] Step 1: Add dimethylaminoethyl methacrylate and diethyl sulfate into an ethanol solvent to obtain a quaternization reaction system, and obtain a prepolymer quaternary ammonium salt after the reaction; the dimethylaminoethyl methacrylate and sulfuric acid The mass ratio of diethyl ester is 1:1.1; the sum of the masses of the dimethylaminoethyl methacrylate and diethyl sulfate accounts for 25% of the mass of the quaternization reaction system; the reaction time is 30 hours, and the reaction temperature It is 0°C.

[0021] Step 2: Add the prepolymer quaternary ammonium salt, N-vinylpyrrolidone and initiator into water to react to obtain a polymerization reaction system; in Step 2, the quality of the initiator is the same as that of N-vinylpyrrolidone and dimethyl methacrylate. The ratio of ...

Example Embodiment

[0024] Example two

[0025] A preparation method of vinylpyrrolidone-dimethylamino ethyl methacrylate copolymer, the difference is that the preparation method includes the following steps:

[0026] Step 1: Add dimethylaminoethyl methacrylate and diethyl sulfate into an ethanol solvent to obtain a quaternization reaction system, and obtain a prepolymer quaternary ammonium salt after the reaction; the dimethylaminoethyl methacrylate and sulfuric acid The mass ratio of diethyl ester is 1:1.1; the sum of the masses of the dimethylaminoethyl methacrylate and diethyl sulfate accounts for 15% of the mass of the quaternization reaction system, and the reaction time of step one is 24 Hours, the reaction temperature is 5℃;

[0027] Step 2: Add the pre-polymer quaternary ammonium salt, N-vinylpyrrolidone and initiator into water to react to obtain a polymerization reaction system; the quality of the initiator is combined with N-vinylpyrrolidone, dimethylaminoethyl methacrylate and The ratio o...

Example Embodiment

[0030] Example three

[0031] A preparation method of vinylpyrrolidone-dimethylamino ethyl methacrylate copolymer, the difference is that the preparation method includes the following steps:

[0032] Step 1: Add dimethylaminoethyl methacrylate and diethyl sulfate into an ethanol solvent to obtain a quaternization reaction system, and obtain a prepolymer quaternary ammonium salt after the reaction; the dimethylaminoethyl methacrylate and sulfuric acid The mass ratio of diethyl ester is 1:1.1; the sum of the masses of the dimethylaminoethyl methacrylate and diethyl sulfate accounts for 18% of the mass of the quaternization reaction system; the reaction time is 30 hours, and the reaction temperature It is 0°C.

[0033] Step 2: Add the pre-polymer quaternary ammonium salt, N-vinylpyrrolidone and initiator into water to react to obtain a polymerization reaction system; the quality of the initiator is combined with N-vinylpyrrolidone, dimethylaminoethyl methacrylate and The ratio of the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a preparation method of a vinyl pyrrolidone-dimethylamino ethyl methacrylate copolymer. The preparation method comprises the following steps: step one, adding dimethylaminoethylmethacrylate and diethyl sulfate into an ethyl alcohol solvent to obtain a quaternarization system, and reacting to obtain a pre-polymer quaternary ammonium salt; step two, adding the pre-polymer quaternary ammonium salt, N-vinyl pyrrolidone and an initiator into water for reacting to obtain a polymerization reaction system; and step three, adding the initiator into the polymerization reaction system for eliminating residual monomers so as to obtain the product. The preparation method has the beneficial effects that the product with the viscosity range of 5000 mPa.s to 150000 mPa.s can be produced, the yield can be 99.5%, the residual rate of monomers is below 0.02%, the product is colorless, transparent and free of peculiar smell, ethyl alcohol and water are taken as solvents, the initiator can preferably participate in the reaction, the cost is lower, few side reaction products are generated, and compared with acetone and methylene dichloride commonly used in the field, the productis low in toxicity and more environmentally-friendly.

Description

technical field [0001] The invention belongs to the field of polymer chemical industry, and in particular relates to a preparation method of vinylpyrrolidone-dimethylaminoethyl methacrylate copolymer. Background technique [0002] Vinylpyrrolidone-dimethylaminoethyl methacrylate copolymer (also known as PVP-Q cationic copolymer) is a common product in the field of fine chemicals. It is used as a conditioning agent in long-lasting curling liquid, conditioning shampoo, and cleaning and conditioning varieties , as a film-forming agent in styling products, has affinity for hair, provides conditioning and firming effects, accumulates very little, makes hair easier to comb, shiny, smooth, and easy to style. It can be used with anionic, non-ionic and Amphoteric surfactant compatibility, non-irritating to eyes and skin. [0003] In the existing preparation process, during the synthesis of vinylpyrrolidone-dimethylaminoethyl methacrylate copolymer, acetone or dichloromethane is usua...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08F226/10C08F220/34
CPCC08F220/34C08F226/10
Inventor 程跃光戴微张敏敏吴璟汪菲
Owner HUANGSHAN BONSUN PHARMA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap