Preparation method of cationic colophony sizing agent macromolecule emulsifier system

A technology of polymer emulsifier and cationic rosin, which is applied in the direction of water repellent addition, can solve the problems of papermaking sewage treatment and unfavorable application effect, and achieve the effect of improving retention rate and reducing the amount of addition

Inactive Publication Date: 2006-07-26
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no matter what kind of emulsification system is used, it contains small molecular emulsifiers, which is not go

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Example 1, firstly mix 20% styrene, 50% ethyl acrylate and 30% methacryloyloxyethyltrimethylammonium chloride uniformly by mass percentage to prepare mixed monomer; then mix the monomer After the body and azobisisobutyronitrile are mixed uniformly at a weight ratio of 100:1, they are added to isopropanol and polymerized at 60°C for 2 hours, then deionized water is added and the organic solvent is distilled off under reduced pressure to obtain a water-soluble copolymer 20% styrene, 50% ethyl acrylate and 30% methacryloyloxyethyltrimethylammonium chloride are uniformly mixed to obtain a mixed monomer by mass percentage; the mixed monomer is mixed with N, N -Dimethylformamide and water-soluble copolymer are mixed and stirred uniformly in a weight ratio of 1:0.4:0.5 to prepare a mixture; adding 0.5% potassium persulfate as an initiator in the mixture, and polymerizing at 70°C A polymer emulsifier with a solid content of 20% and a zeta potential of 42mV can be obtained in 5 ...

Embodiment 2

[0008] Embodiment 2, at first 30% styrene, 40% butyl acrylate and 30% dimethylaminoethyl methacrylate are mixed uniformly by mass percentage to make mixed monomers; then mixed monomers and peroxidized Benzoyl was mixed evenly in a weight ratio of 100:1.5, added to acetone and polymerized at 70°C for 1.5 hours, then deionized water was added and the organic solvent was distilled off under reduced pressure to obtain a water-soluble copolymer; % styrene, 40% butyl acrylate and 30% dimethylaminoethyl methacrylate are mixed uniformly to obtain a mixed monomer; the mixed monomer is mixed with N, N-dimethylformamide, water-soluble copolymer According to the weight ratio of 1: 0.5: 0.4, mix and stir evenly to prepare the mixture; add 0.8% potassium persulfate as the initiator in the mixture, and polymerize at 80° C. for 4 hours to obtain a solid content of 25%. A polymer emulsifier with a zeta potential of 44mV.

Embodiment 3

[0009] Example 3, firstly mix 30% styrene, 30% hexyl acrylate and 40% methacryloyloxyethyltrimethylammonium chloride by mass percentage to make mixed monomer; then mix the monomer After mixing homogeneously with benzoyl peroxide in a weight ratio of 100:2, add it to N,N-dimethylformamide and polymerize at 80°C for 1 hour, add deionized water and distill off the organic solvent under reduced pressure , to obtain a water-soluble copolymer; 30% styrene, 30% hexyl acrylate and 40% methacryloyloxyethyltrimethylammonium chloride are uniformly mixed to obtain a mixed monomer by mass percentage; the mixed monomer Body and N, N-dimethylformamide, water-soluble copolymer are mixed and stirred evenly by the weight ratio of 1: 0.6: 0.3, make mixture; Add the ammonium persulfate that mass percentage is 1.2% in the mixture as initiator, The polymer emulsifier with a solid content of 30% and a zeta potential of 45mV can be obtained by polymerizing for 3 hours at 75°C.

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Abstract

This invention discloses a cationic rosin sizing agent macromolecular emulsification agent system preparing method, first mixing up the styrene, acrylate and cationic monomer and oil dissolvent inducer, then adding them into the isopropanol or acetone or N, N-diformyl-methylamine to aggregate, decompressing and distilling to remove the organic solvent to obtain the water-soluble copolymer; mixing up the styrene, acrylate and cationic monomer, N, N-diformyl-methylamine, water-soluble copolymer, then emulsifying them, which is solicited by the persulfuric acid sulfate. Using this invention can reduce the append quantity of the vitriol aluminum greatly; improve the left rate of the rosin sizing agent application effect.

Description

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Claims

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Application Information

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Owner SHAANXI UNIV OF SCI & TECH
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