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Cationic rosin size emulsifier and preparation method thereof

A technology of cationic rosin gum and emulsifier, applied in the direction of adding water repellent, can solve the problems of poor emulsion stability, high emulsification cost, out of control reaction, etc., and achieve the effect of preventing metal ion interference, good effect and stable quality

Active Publication Date: 2018-08-14
辽宁兴东科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention adopts static aqueous solution polymerization, the production process is simple, and the production efficiency is high, but the emulsion obtained by emulsifying rosin with the emulsifier prepared by the invention has poor stability, and other auxiliary agents are needed to emulsify rosin, and the cost of emulsification is high and the dosage is large; At the same time, if the aqueous solution is left to stand for polymerization, it is easy to produce agglomeration and cause the reaction to run out of control.

Method used

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  • Cationic rosin size emulsifier and preparation method thereof
  • Cationic rosin size emulsifier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of preparation method of cationic rosin latex emulsifier, comprises steps:

[0031] Feed 15kg nitrogen into the reactor, add 70kg dimethylaminoethyl methacrylate, 20kg styrene, 2kg chitosan (the weight-average molecular weight is 200,000, and the degree of deacetylation is 80%), 130kg glacial acetic acid, 450kg Mix deionized water, 5kg acrylic acid, 60kg acrylamide and 6kg potassium tartrate evenly, set the rotation speed at 170 rpm, add 3kg potassium persulfate when the temperature in the kettle reaches 50°C, and time the reaction when the temperature in the kettle reaches 80°C After 2 hours, 2 kg of potassium persulfate was added, and the reaction was continued at 80° C. for 1 hour to obtain a reaction solution. Additional water was added until the solid content reached 35 wt%, and reaction distillation was carried out at 102° C. for 1 h. Cool to room temperature, discharge, and add water until the solid content is 30 wt%, to obtain a transparent rosin latex e...

Embodiment 2

[0034] A kind of preparation method of cationic rosin latex emulsifier, comprises steps:

[0035] Pass into 24kg nitrogen in the reactor, add 60kg dimethylaminoethyl methacrylate, 25kg styrene, 2kg chitosan (the weight-average molecular weight is 150,000, and the degree of deacetylation is 90%), 120kg glacial acetic acid, 500kg Mix deionized water, 8kg acrylic acid, 70kg acrylamide and 5kg potassium tartrate evenly, set the rotation speed at 150 rpm, add 3kg potassium persulfate when the temperature in the kettle reaches 40°C, and time the reaction when the temperature in the kettle reaches 90°C After 2 hours, 3kg of potassium persulfate was added, and the reaction was continued at 90°C for 1 hour to obtain a reaction solution. Additional water was added to adjust the solid content to 30 wt%, and reaction distillation was carried out at 110° C. for 1 h. Cool to room temperature, discharge, and add water until the solid content is 25 wt%, to obtain a transparent rosin latex em...

Embodiment 3

[0038] A kind of preparation method of cationic rosin latex emulsifier, comprises steps:

[0039]Feed 15kg nitrogen into the reactor, add 65kg dimethylaminoethyl methacrylate, 23kg styrene, 2kg chitosan (weight average molecular weight is 300,000, deacetylation degree is 95%), 150kg glacial acetic acid, 200kg Mix deionized water, 6kg acrylic acid, 65kg acrylamide and 8kg potassium tartrate evenly, set the rotation speed at 190 rpm, add 1.2kg potassium persulfate when the temperature in the kettle reaches 60°C, and when the temperature in the kettle reaches 70°C, time After reacting for 2 hours, 0.8 kg of potassium persulfate was added, and the reaction was continued at 70° C. for 2 hours to obtain a reaction liquid. Water was added to adjust the solid content to 40 wt%, and reaction distillation was carried out at 90° C. for 2 hours. Cool to room temperature, discharge, and add water until the solid content is 35 wt%, to obtain a transparent rosin latex emulsifier.

[0040] ...

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Abstract

The invention provides a cationic rosin size emulsifier and a preparation method thereof. The cationic rosin size emulsifier is prepared from dimethylaminoethyl methacrylate, styrene, chitosan, glacial acetic acid, water, acrylic acid, acrylamide, potassium sodium tartrate and an initiator. The obtained emulsifier has a good stability, can be used to directly emulsify rosin, and has the advantagesof small use amount, good effect and low cost, a rosin size emulsion obtained after emulsification has nanoscale particles and a stable quality, and can be stably stored (at -5 to 50 DEG C) for a long time; and the rosin size emulsion obtained after emulsification is applied to sizing, has the advantages of small use amount of other sizing additives, small use amount of a sizing agent, good effect and low cost, and makes sized paper have certain antibacterial and bactericidal effects and good durability.

Description

technical field [0001] The invention relates to a cationic rosin rubber emulsifier and a preparation method thereof, belonging to the technical field of emulsifier preparation. Background technique [0002] Cationic rosin size is a kind of sizing agent inside paper, mainly used to improve the water resistance of paper. Cationic rosin gum is for anionic rosin gum. Anionic rosin gum is a traditional paper sizing agent in China. It is usually made of rosin gum emulsified by high-temperature emulsified rosin with a special anionic rosin gum emulsifier. The anionic rosin gum usually has a solid content of about 50%; Rosin Gum Emulsifier Emulsifies rosin at high temperature to make rosin gum emulsion. Cationic rosin gum usually has a solid content of about 25%. The sizing effect is better than that of anionic rosin gum, and the cost is 40% lower than that of anionic rosin gum. At present, cationic rosin rubber emulsifiers mainly rely on imports or are monopolized by foreign comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16
CPCD21H21/16
Inventor 王正顺
Owner 辽宁兴东科技有限公司
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