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Preparation method of dimethyl diallyl ammonium chloride and acrylamide copolymer product for daily use chemicals

A dimethyl diallyl ammonium chloride and acrylamide copolymer technology is applied in the field of preparation of dimethyl diallyl ammonium chloride and acrylamide copolymer products for daily chemicals, and can solve the problem of acrylamide residues Exceeding the standard of monomer, increasing process complexity and energy consumption, causing problems such as imperfect system, to achieve the effect of excellent product chromaticity, stable reaction and easy control

Active Publication Date: 2021-02-12
SNF CHINA FLOCCULANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN201210147323.4 published the application of PDA in water treatment flocculation, which uses azo initiators to assist photoinitiated polymerization, and uses organic solvents to act as a polymerization system. In the later stage, a purification process is required, and the process is complicated, which is not conducive to production operations.
Chinese patent CN201110129124.6 uses a composite initiator system for aqueous polymerization, which is composed of an azo initiator system and a high-temperature initiator persulfate. The temperature needs to be strictly controlled at each stage, and the initial initiation temperature is between 46-55 degrees Celsius. , it is necessary to heat the reaction system to carry out the polymerization reaction, which increases the complexity of the process and the energy consumption in the production process
Therefore, in the process of polymerization production of PDA at present, due to its imperfect initiation system, the conversion rate of its monomer is not high, the process operation is complicated, and the residual monomer of acrylamide exceeds the standard, etc., which limits its application in the field of daily chemicals.

Method used

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  • Preparation method of dimethyl diallyl ammonium chloride and acrylamide copolymer product for daily use chemicals
  • Preparation method of dimethyl diallyl ammonium chloride and acrylamide copolymer product for daily use chemicals
  • Preparation method of dimethyl diallyl ammonium chloride and acrylamide copolymer product for daily use chemicals

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step (1): Dimethyldiallyl ammonium chloride, acrylamide, dimethylaminoethyl methacrylate and deionized water were evenly stirred to obtain an aqueous polymerized monomer solution with a mass concentration of 25%. The aqueous polymerized monomer solution was adjusted to pH 3.5 with citric acid. At room temperature, feed nitrogen gas with a flow rate of 60m3 / h into the reactor for 15min. Wherein the mass ratio of acrylamide to dimethyldiallylammonium chloride is 2.5, and the mass ratio of acrylamide to dimethylaminoethyl methacrylate is 50.

[0023] Step (2): At room temperature, add 2,2'-azobis(2-methylpropylamidine) dihydrochloride in 0.17% aqueous solution of polymerized monomer; sodium hypophosphite in 0.0025% aqueous solution of polymerized monomer; 0.005% azobisisobutylimidazoline hydrochloride in the aqueous solution of polymerized monomers; ammonium persulfate in 0.15% aqueous solution of polymerized monomers; molar salt in 0.0008% aqueous solution of polymerized...

Embodiment 2

[0026] Step (1): Stir dimethyldiallyl ammonium chloride, acrylamide, dimethylaminoethyl methacrylate and deionized water evenly to obtain an aqueous polymerized monomer solution with a mass concentration of 15%. The aqueous polymerized monomer solution was adjusted to pH 3.5 with citric acid. At room temperature, feed nitrogen gas with a flow rate of 60m3 / h into the reactor for 15min. Wherein the mass ratio of acrylamide to dimethyldiallylammonium chloride is 2.5, and the mass ratio of acrylamide to dimethylaminoethyl methacrylate is 20.

[0027] Step (2): At room temperature, add 2,2'-azobis(2-methylpropylamidine) dihydrochloride in 0.2% polymerized monomer aqueous solution; 0.0025% polymerized monomer aqueous solution in sodium hypophosphite; 0.002% azobisisobutylimidazoline hydrochloride in the aqueous solution of polymerized monomers; ammonium persulfate in 0.15% aqueous solution of polymerized monomers; When the reaction is complete, age for 1 hour.

[0028] Step (3): ...

Embodiment 3

[0030] Step (1): Stir dimethyl diallyl ammonium chloride, acrylamide, hydroxypropyl acrylate and deionized water evenly to obtain an aqueous polymerized monomer solution with a mass concentration of 35%. The aqueous polymerized monomer solution was adjusted to pH 3.5 with citric acid. At room temperature, feed nitrogen gas with a flow rate of 60m3 / h into the reactor for 15min. The mass ratio of acrylamide to dimethyl diallyl ammonium chloride is 2.5, and the mass ratio of acrylamide to hydroxypropyl acrylate is 50.

[0031] Step (2): At room temperature, add 2,2'-azobis(2-methylpropylamidine) dihydrochloride in 0.17% aqueous solution of polymerized monomer; sodium hypophosphite in 0.0025% aqueous solution of polymerized monomer; 0.005% azobisisobutylimidazoline hydrochloride in the aqueous solution of polymerized monomers; ammonium persulfate in 0.15% aqueous solution of polymerized monomers; molar salt in 0.0008% aqueous solution of polymerized monomers were added to the rea...

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Abstract

The invention discloses a preparation method of a dimethyl diallyl ammonium chloride and acrylamide copolymer product for daily use chemicals, which enables the compatibility of the product and surface activity to be wider by adding functional monomers. With a composite initiation system, the reaction can be initiated at room temperature, no external artificial temperature intervention is needed,and the method is stable in reaction and easy to control. Non-explosive polymerization is realized. A polymer product is prepared, the polymer has very high viscosity and can achieve thickening stability and conditioning performance, and in a test of compatibility with other surfactants, the compatibility of the product and the surfactants is wide. The polymer is simple in preparation method, trace in residual monomer, safe and non-irritant, and has a good application prospect in the field of daily use chemicals.

Description

technical field [0001] The invention belongs to the field of polymer synthesis, and in particular relates to a preparation method of a daily chemical dimethyl diallyl ammonium chloride and acrylamide copolymer product. Background technique [0002] Dimethyldiallylammonium chloride and acrylamide copolymer (PDA) is a kind of cationic organic polymer compound, which is widely used in sewage treatment, paper industry, petrochemical industry, daily chemical industry and other fields, and has achieved good results. Effect. PDA copolymers are often used as hair and skin conditioning agents in the field of daily chemical industry, and mainly play the role of antistatic, thickening, antibacterial, foam increasing and stabilizing properties, and stability. Most of the applications of PDA in the field of daily chemical industry need to be compatible with surfactants, which requires good compatibility with surfactants, and the foaming performance of daily chemical products is weakly r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F226/04C08F220/34C08F220/20C08F6/06C08F4/04C08F4/40
CPCC08F220/56C08F4/04C08F4/40C08F6/006C08F226/04C08F220/34C08F220/20C08L39/00
Inventor 陶倩云凌静丁健朱亮
Owner SNF CHINA FLOCCULANT