US 12,168,757 B2
Well defined low molecular weight dispersant polymethacrylates
Paul O'Hora, Nottingham (GB); Dixit Parmar, Long Eaton (GB); Timothy R. Smith, Belper (GB); David M. Haddleton, Coventry (GB); and Georgios Patias, Coventry (GB)
Assigned to The Lubrizol Corporation, Wickliffe, OH (US); and University of Warwick, Coventry (GB)
Appl. No. 17/924,247
Filed by The Lubrizol Corporation, Wickliffe, OH (US); and University of Warwick, Coventry (GB)
PCT Filed May 7, 2021, PCT No. PCT/US2021/031346
§ 371(c)(1), (2) Date Nov. 9, 2022,
PCT Pub. No. WO2021/231220, PCT Pub. Date Nov. 18, 2021.
Claims priority of provisional application 63/023,935, filed on May 13, 2020.
Prior Publication US 2023/0183595 A1, Jun. 15, 2023
Int. Cl. C10M 149/00 (2006.01); C08F 8/32 (2006.01); C10N 20/04 (2006.01); C10N 30/04 (2006.01); C10N 40/25 (2006.01); C10N 70/00 (2006.01)
CPC C10M 149/00 (2013.01) [C08F 8/32 (2013.01); C10M 2217/003 (2013.01); C10N 2020/04 (2013.01); C10N 2030/04 (2013.01); C10N 2040/25 (2013.01); C10N 2070/00 (2013.01)] 7 Claims
 
1. A dispersant polymethacrylate polymer (“DPMA”) comprising an amine terminated polymethacrylate polymer represented by Formula II

OG Complex Work Unit Chemistry
where R1 is an alkyl group of 1 to 24 carbon atoms; X is a nitrogen-containing group; and n is an integer of 3 to 30.