Method for preparing 'water-in-water' emulsion paper-making retention aid

Abstract

The invention relates to a method for preparing a novel dispersing-type high-concentration high-molecular-weight polyacrylamide product which uses water as a solvent. The retention aid is polymerized and synthesized by deionized water, acrylamide monomer, dimethylamino-acetate chloro-benzyl acrylate, polyamine, ammonium sulfate and a mirabilite initiating liquid. The method is characterized by constant temperature and constant polymerization of kettle polymerization. According to the method, the 'water-in-water' emulsion paper-making retention aid is prepared by the constant-temperature constant polymerization method. The reacting polymerization process is easy to control, a product which is prepared under a reacting condition of initiating by the initiator and regulated by controlling the temperature in a range of 36-42 DEG C has high quality, and the emulsion is uniform and soluble and is particularly suitable for continuous feeding of a paper machine; and the product can be completely dissolved in 10 minutes, and be stored for half a year without deteriorating. The method is easy for industrial application.

Description

technical field [0001] The invention relates to a new method for producing a "water-in-water" emulsion papermaking retention aid, and specifically belongs to the papermaking industry. Background technique [0002] At present, the polyacrylamide series retention aids used in papermaking are mostly granular powdery solids, which have a long dissolution time, are easy to dissolve and cannot be opened, are inconvenient to use, and are not conducive to continuous addition of large paper machines. The production of "water-in-oil" emulsion papermaking retention aid is complicated and easy to pollute. There are also many manufacturers of "water-in-water" emulsion paper retention aids, but most of them undergo the first "explosion polymerization" reaction, resulting in a large load on the motor, which is easy to burn the motor and cannot be decomposed. Production is difficult to control, resulting in poor quality stability of finished products. Contents of the invention [0003] ...

AI Technical Summary

Problems solved by technology

[0002] At present, the polyacrylamide series retention aids used in papermaking are mostly granular powder solids, which have a long dissolution time, are easy to dissolve and cannot be opened, are inconvenient to use, and are not conducive to continuous addition of large paper machines.

"Water-in-oil" emulsion papermaking retention aid is complicated to produce and easy to pollute

"Water-in-water" emulsion paper retention aids are also produced by many manufacturers, but most of them are produced by the first "explosion polymerization" reaction, resulting in a large motor load, easy to burn the motor, and cannot be broken down.

Difficult to master production, resulting in poor quality stability of finished products