US 11,814,451 B2
Methods for preparing branched poly (2-hydroxyethyl methacrylate) at room temperature by inverse emulsion polymerization
Wenyan Huang, Zhangzhou (CN); Bibiao Jiang, Zhangzhou (CN); Li Jiang, Zhangzhou (CN); Hongjun Yang, Zhangzhou (CN); Qimin Jiang, Zhangzhou (CN); Xiaoqiang Xue, Zhangzhou (CN); and Di Zhu, Zhangzhou (CN)
Assigned to CHANGZHOU UNIVERSITY, Changzhou (CN)
Filed by CHANGZHOU UNIVERSITY, Jiangsu (CN)
Filed on Sep. 26, 2022, as Appl. No. 17/935,573.
Application 17/935,573 is a continuation of application No. PCT/CN2020/140466, filed on Dec. 29, 2020.
Claims priority of application No. 202010257841.6 (CN), filed on Apr. 3, 2020.
Prior Publication US 2023/0018276 A1, Jan. 19, 2023
Int. Cl. C08F 120/20 (2006.01)
CPC C08F 120/20 (2013.01) 4 Claims
 
1. A method for preparing branched poly (2-hydroxyethyl methacrylate) at room temperature by inverse emulsion polymerization, the method comprising:
using benzoyl peroxide (BPO) as an oxidant and 2-methyl-N-[3-(methyl-phenyl-amino)-propyl]-acrylamide (MPAEMA) as a reductant monomer to form a redox initiation system, water and toluene as media, emulsifiers, 2-hydroxyethyl methacrylate as a polymer monomer, and obtaining branched poly (2-hydroxyethyl methacrylate) by a reaction at the room temperature through radical inverse emulsion polymerization, wherein
a ratio of amount of substance of the oxidant monomer and amount of substance of the reductant monomer is 1:1;
the polymer monomer is added to water to dissolve to form an aqueous solution with a concentration of 25%;
a reaction temperature of the polymerization is 25° C.;
a reaction time of the polymerization is 8 hours;
a ratio of amount of substance of the reductant monomer and amount of substance of the polymer monomer is 1:80-1:160; and
a mass ratio of water phase and toluene is 1:1.