US 11,999,809 B2
Graft copolymers of dextran and polyacrylamide and methods of making and using same
D. V. Satyanarayana Gupta, Columbus, GA (US); Michael Joseph Rubal, Columbus, GA (US); and Derek Christopher Mouton, Columbus, GA (US)
Assigned to FERMWORX, LLC, Columbus, GA (US)
Filed by FermWorx, LLC, Columbus, GA (US)
Filed on Jun. 10, 2022, as Appl. No. 17/837,946.
Prior Publication US 2023/0399447 A1, Dec. 14, 2023
Int. Cl. C08F 251/00 (2006.01)
CPC C08F 251/00 (2013.01) 3 Claims
 
1. A graft copolymer composition comprising:
a graft copolymer, wherein the graft copolymer comprises:
dextran, wherein the dextran is a backbone polymer comprising about 10_wt % to about 50 wt % of the graft copolymer, based on the total weight of the graft copolymer; and
polyacrylamide, wherein the polyacrylamide is a side chain polymer comprising about 50 wt % to about 90 wt % of the graft copolymer, based on the total weight of the graft copolymer, wherein the graft copolymer has a weight-average molecular weight from about 1,000,000 g/mol to about 1,500,000 g/mol; and
water, wherein the graft copolymer composition has a weight percent of the graft copolymer from about 0.12 to about 0.36 and wherein the graft copolymer composition has viscosity from about 0.5 cP to about 10 cP at a temperature of about 48.9° C.