US 11,718,696 B2
Process for fast dissolution of powder comprising low molecular weight acrylamide-based polymer
Heqing Huang, Naperville, IL (US); Cheng Sung Huang, Naperville, IL (US); and Weiguo Cheng, Naperville, IL (US)
Assigned to ECOLAB USA INC., St. Paul, MN (US)
Appl. No. 16/635,125
Filed by ECOLAB USA INC., St. Paul, MN (US)
PCT Filed Jul. 31, 2018, PCT No. PCT/US2018/044570
§ 371(c)(1), (2) Date Jan. 29, 2020,
PCT Pub. No. WO2019/028001, PCT Pub. Date Feb. 7, 2019.
Claims priority of provisional application 62/539,323, filed on Jul. 31, 2017.
Prior Publication US 2020/0255569 A1, Aug. 13, 2020
Int. Cl. C08F 220/56 (2006.01); C08J 3/05 (2006.01); D21H 17/37 (2006.01); D21H 21/18 (2006.01); C08L 33/26 (2006.01)
CPC C08F 220/56 (2013.01) [C08J 3/05 (2013.01); C08L 33/26 (2013.01); D21H 17/375 (2013.01); D21H 21/18 (2013.01); C08J 2333/26 (2013.01)] 15 Claims
 
1. A process for making an acrylamide-based polymer solution, comprising blending a mixture of an acrylamide-based polymer powder and a solvent for no more than about 15 minutes to yield the polymer solution,
wherein the acrylamide-based polymer powder comprises particles having been dry-cut to a median particle size of from about 200 microns to about 10,000 microns, wherein the acrylamide-based polymer comprises formula AP1:

OG Complex Work Unit Chemistry
wherein E is one or more associative monomer units(s), F is one or more additional monomer unit(s), G is one or more additional monomer unit(s) of Formula I:

OG Complex Work Unit Chemistry
wherein R1 is H or C1-C4 alkyl and each R2 is independently H or an alkyl group, an aryl group, a fluoroalkyl group, or a fluoroaryl group, and H is optionally present and is one or more piperidine-2,6-dione unit(s),
wherein the one or more piperidine-2,6-dione(s) are formed upon cyclization of an acrylamide nitrogen of the additional monomer unit of Formula I (“G”) on a carbonyl of the additional monomer unit (“F”).