Preparation method of cationic nonsoap colophony sizing agent

A cationic and sizing agent technology, applied in the direction of water repellent addition, etc., can solve the problems of papermaking sewage treatment and unfavorable application effect, and achieve the effect of improving retention rate, high cationic degree, 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

But no matter what method is used, it is necessary to add conventional surfactants to maintain the stability of the emulsion, which is not good for the treatment of papermaking sewage and the application effect, especially for the sizing effect of paper

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Example 1, first keep 300 parts of completely melted rosin at 110°C according to the mass ratio, then add 90 parts of epichlorohydrin dropwise therein, and after 2 hours of reaction, lower the system temperature to 70°C, then add 200 parts by mass The concentration is 30% trimethylamine aqueous solution, the dripping time is 3 hours, and the water in the system is evaporated after 5 hours of reaction to obtain a brownish-yellow modified rosin; The mass ratio is mixed as the reaction medium; the mass percentage is 20% styrene, 45% ethyl acrylate, 30% methacryloyloxyethyl trimethyl ammonium chloride and 5% potassium persulfate drop respectively Add it to the reaction medium, polymerize at 60°C for 8 hours, and then neutralize with glacial acetic acid to obtain a cationic polymer surfactant. The solid content of the surfactant is 20%, and the zeta potential is 37mV; the modified rosin and toluene Mix and heat until dissolved, then add cationic polymer surfactant and stir e...

Embodiment 2

[0008] Example 2, first keep 300 parts of completely melted rosin at 110°C according to the mass ratio, then add 90 parts of epichlorohydrin dropwise to it, and after reacting for 2 hours, lower the system temperature to 70°C, then add 200 parts by mass The concentration is 30% trimethylamine aqueous solution, the dripping time is 3 hours, and the water in the system is evaporated after 5 hours of reaction to obtain a brownish-yellow modified rosin; The mass ratio is mixed as the reaction medium; the mass percentage is 30% styrene, 36% butyl acrylate, 30% methacryloyloxyethyl trimethyl ammonium chloride and 4% potassium persulfate drop respectively Add it to the reaction medium, polymerize at 70°C for 7 hours, and then neutralize with glacial acetic acid to obtain a cationic polymer surfactant. The solid content of the surfactant is 25%, and the zeta potential is 41mV; the modified rosin and toluene Mix and heat until dissolved, then add cationic polymer surfactant and stir ev...

Embodiment 3

[0009] Example 3, first keep 300 parts of completely melted rosin at 110°C according to the mass ratio, then add 90 parts of epichlorohydrin dropwise to it, and after reacting for 2 hours, lower the system temperature to 70°C, then add 200 parts by mass The concentration is 30% trimethylamine aqueous solution, the dripping time is 3 hours, and the water in the system is evaporated after 5 hours of reaction to obtain a brownish-yellow modified rosin; The mass ratio is mixed as the reaction medium; the mass percentage is 27% of styrene, 30% of hexyl acrylate, 40% of methacryloyloxyethyltrimethylammonium chloride and 3% of potassium persulfate. Add it to the reaction medium, polymerize at 80°C for 6 hours, and then neutralize with glacial acetic acid to obtain a cationic polymer surfactant. The solid content of the surfactant is 30%, and the zeta potential is 45mV; the modified rosin and toluene Mix and heat until dissolved, then add the cationic polymer surfactant and stir evenl...

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Abstract

This invention discloses a cationic non-soap rosin sizing agent preparing method, the making steps as follows: fist changing the rosin nature through epoxy chloropropane and Trimethylamine, then using the styrene, acrylate and cationic monomer aggregation to obtain the cationic macromolecular surface-active agents; under the effect of the assistant solvent and cationic macromolecular surface-active agents, the rosin is dealt by dispersing through emulsification, braising out the solvent and colloid dealing to obtain the high cationic non-soap rosin sizing agent. This invention can reduce the append quantity of the vitriol aluminum greatly; realize applying glue under neutral and ebb alkali condition, improve the left rate of the rosin sizing agent and its application effect.

Description

technical field [0001] The invention belongs to the field of preparation technology of papermaking chemicals, in particular to a preparation method of cationic soap-free rosin sizing agent. Background technique [0002] With the neutralization (alkaline) of the papermaking system, cationic rosin gum has been widely used due to its advantages of self-retention, near-neutral addition, low equipment corrosion, reasonable cost, and high stability. There are three main methods for the preparation of cationic rosin gum: self-cationization method, transformation method and cationic emulsifier emulsification method. However, no matter which method is used, it is necessary to add conventional surfactants to maintain the stability of the emulsion, which is not good for the treatment of papermaking wastewater and the application effect, especially for the sizing effect of paper. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentione...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16
Inventor 李小瑞沈一丁李刚辉费贵强王海花任庆海
Owner SHAANXI UNIV OF SCI & TECH
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