US 11,866,539 B2
Process for preparing an ultra-high molecular weight polymer via emulsion polymerization at room temperature
Wenyan Huang, Jiangsu (CN); Bibiao Jiang, Jiangsu (CN); Xiaoqiang Xue, Jiangsu (CN); Hongjun Yang, Jiangsu (CN); and Qimin Jiang, Jiangsu (CN)
Assigned to Changzhou University, Jiangsu (CN)
Filed by Changzhou University, Suzhou (CN)
Filed on Mar. 1, 2021, as Appl. No. 17/188,760.
Application 17/188,760 is a continuation of application No. 15/742,407, filed on Jan. 5, 2018.
Application 15/742,407 is a continuation of application No. PCT/CN2017/081177, filed on Apr. 20, 2017.
Claims priority of application No. 201611258844.1 (CN), filed on Dec. 30, 2016; application No. 201611258871.9 (CN), filed on Dec. 30, 2016; and application No. 201611263551.2 (CN), filed on Dec. 30, 2016.
Prior Publication US 2021/0189047 A1, Jun. 24, 2021
Int. Cl. C08F 2/26 (2006.01); C08F 18/08 (2006.01); C08F 20/18 (2006.01); C08F 293/00 (2006.01); C08F 118/08 (2006.01); C08F 112/08 (2006.01); C08F 120/14 (2006.01); C08F 120/18 (2006.01); C08F 20/14 (2006.01)
CPC C08F 293/005 (2013.01) [C08F 2/26 (2013.01); C08F 18/08 (2013.01); C08F 112/08 (2013.01); C08F 118/08 (2013.01); C08F 120/14 (2013.01); C08F 120/18 (2013.01); C08F 20/14 (2013.01); C08F 2438/02 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A process for preparing an ultra-high molecular weight polymer via emulsion polymerization at room temperature comprising potassium persulfate or ammonium persulfate as an initiator, water as a medium, an anionic surfactant as an emulsifier, sodium bicarbonate as a pH regulator, vinyl acetate or (meth) acrylate as a monomer to polymerize by free radical emulsion; to obtain the ultra-high molecular weight polymer wherein a weight average molecular weight of the ultra-high molecular weight polymer is larger than 1,000,000 g/mol;
a molar ratio of the initiator and the monomer is 1-5:100;
wherein the anionic surfactant is sodium dodecyl benzene sulfonate or sodium dodecyl sulfate;
wherein a mass ratio of the water and the monomer is 2-5:1;
wherein the mass ratio of the anionic surfactant and the monomer is 4-6:100 and the mass ratio of the sodium bicarbonate as the pH regulator and the monomer is 2-4:100;
wherein a pH value is adjusted to 7-8 for stability of the process;
wherein the room temperature is between 25° and 35° C.; and
wherein a polymerization reaction time is controlled to a range of 1-6 hours.