A kind of preparation method of anionic polyacrylamide emulsion and prepared emulsion

Abstract

The invention provides a preparation method of an anionic polyacrylamide emulsion, which comprises the following steps: 1) mixing 10-30 parts by weight of high-polymer stabilizer, 10-20 parts of emulsifier and 300-400 parts of organic hydrocarbon solvent; 2) adding 0.01-0.1 part of thermal initiator, and stirring uniformly; 3) mixing 200-400 parts of deionized water, 100-400 parts of monomer and 0.1-1 part of chelator; 4) emulsifying and homogenizing; 5) deoxidizing the emulsified and homogenized emulsion by nitrogen charging for 2-3 hours; and 6) adding 0.01-0.05 part of initiator until the temperature of the reaction mixture increases to a constant value, and keeping the temperature for 15-30 minutes. The reversed phase emulsion polymerization technique of combining the stabilizer and emulsifier can be used for preparing a high-concentration high-stability instant polyacrylamide emulsion product; and in addition, the synthesis technique can be adjusted to obtain the high-concentration anionic polymer emulsion with different molecular weights and different ion degrees.

Description

technical field [0001] The invention belongs to the field of preparation of organic polymer compounds, and in particular relates to a method for preparing an acrylamide polymer and a prepared product. Background technique [0002] At present, how to further increase the molecular weight of anionic polyacrylamide is being studied at home and abroad to meet the needs of consumers for higher molecular weight products. Although there have been some reports on the development direction of this kind of polymer at home and abroad, due to the poor stability of the product, it is still in the laboratory research stage and has not been industrialized or applied. Because the concentration of anionic polyacrylamide emulsion sold in the market is generally low, the molecular weight is low, and the storage stability is poor, which brings great inconvenience to transportation and customer use. [0003] In patent CN101029107A, anionic polyacrylamide powder is prepared by composite initiati...

AI Technical Summary

Problems solved by technology

[0004] The polyacrylamide powder products in the prior art have defects such as time-consuming and labor-intensive dissolution, harsh working environment, slow dissolution speed, and huge dissolution equipment, which makes the foreign market gradually shift from powder products to emulsion products, but the traditional reverse phase The PAM emulsion product obtained by emulsion polymerization has extremely poor stability and cannot meet the needs of users

At present, the concentration of polyacrylamide emulsion sold in the market is generally low (30-40%), and the storage stability is poor (generally 3 months to 6 months, there will be stratification), which brings great inconvenience to transportation and customer use.