3-vinylamino-2-hydroxypropyltrimethylammonium chloride copolymer and its preparation and application

Abstract

The invention discloses 3-vinylamino-2-hydroxypropyltrimethylammonium chloride copolymer and preparation and application thereof.The preparation includes: placing acrylamide monomer and distilled water in a N2 protected reactor, adding a chain transfer agent, a complexing agent and an initiator, stirring at 30-70 DEG C for 10-30 min, standing for 10-30 min, cooling to 10-15 DEG C, adding sodium hydroxide, stirring well and then adding sodium hydrochloride slowly, reacting for 1-3 h, adding sodium hydroxide, reacting for 2-4 h, dropwise adding epichlorohydrin, reacting for 0.1-0.5 h, heating to 50-90 DEG C, reacting for 1-3 h, dropwise adding trimethylamine aqueous solution slowly, and reacting for 2-5 h and then cooling to normal temperature to obtain the 3-vinylamino-2-hydroxypropyltrimethylammonium chloride copolymer; the copolymer is light yellow thick liquid, > / =13% in solid content, 9-10 in pH, 80-100 in degree of polymerization and higher than 60% in amination degree, and is useful as a paper enhancer, a paper sizing agent, a water treating agent and the like.The preparation process is simple, production materials are easy to obtain, a production cycle is short, reacting is mild, and invention is convenient for industrial large-scale production and has a promising application prospect.

Description

technical field [0001] The invention belongs to the fields of fine chemicals, environment-friendly materials, papermaking additives and water treatment agents, and specifically relates to a 3-vinylamino-2-hydroxypropyl trimethylammonium chloride copolymer and its preparation and application. Background technique [0002] With the improvement of consumption level, people have higher and higher requirements for paper grade and quality. How to improve the strength of paper to meet people's needs is the direction that people have been studying. We can increase the ratio of long fibers by beating and use reinforcing agents to enhance the strength of paper. Among them, there are many defects in the two methods of beating and the ratio of long fibers, such as large power consumption and low water drainage. , tearing becomes weaker, etc., and paper additives are favored by people because they do not have the above problems [1] . [0003] Paper sizing agents can improve the appeara...

AI Technical Summary

Problems solved by technology

The traditional cationic sizing agent usually uses starch, but the general starch-based papermaking strengthening agent has limited improvement in the bonding area at the fiber molecular level, and consumes a lot of food, resulting in poor economic benefits. [5]

Traditional sizing agent emulsions use cationic starch as emulsifier and stabilizer, but the retention rate of this type of emulsion on fibers is relatively low, the reaction with fibers is relatively slow, and the required sizing time is long [6]

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