Poly-N-dimethylaminomethacrylamide emulsion

Poly-N-dimethylaminomethacrylamide emulsion

[Preparation method] The preparation of poly-N-dimethylaminomethacrylamide emulsion mainly utilizes dimethylaminomethacrylamide monomer through free radical polymerization, so the preparation process is divided into 2 steps: ① Preparation of monomer ②Inverse emulsion polymerization

(1) Preparation of monomer

In a three-necked flask equipped with a thermometer, an electromagnetic stirrer and a pH electrode, add 1 part (by mass, the same below) of paraformaldehyde with a formaldehyde content of 96% and 3.

Add 4.

(2) Inverse emulsion polymerization

298 parts of 36% monomer aqueous solution (pH=3), 56 parts of deionized water, 140 parts of Isopar M and 11 parts of oleic acid isopropanolamide were added into the polymerization kettle to form a water-in-oil emulsion

The initiator used in the polymerization reaction can be hydroquinone, tert-butyl pyrocatechol, phenothiazine or copper sulfate , and the addition amount of the initiator is 0.