US 12,146,015 B2
Crosslinked polymer for dewaxing—preparation and implementations thereof
Siva Kesava Raju Chintalapati, Bangalore (IN); Naresh Kottari, Bangalore (IN); Srinivasa Rao Ganagalla, Bangalore (IN); Valavarasu Gnanasekaran, Bangalore (IN); and Ravi Balasubramaniam, Bangalore (IN)
Assigned to Hindustan Petroleum Corporation Limited, Bangalore (IN)
Appl. No. 17/906,848
Filed by Hindustan Petroleum Corporation Limited, Bangalore (IN)
PCT Filed Apr. 21, 2021, PCT No. PCT/IN2021/050393
§ 371(c)(1), (2) Date Sep. 20, 2022,
PCT Pub. No. WO2021/255747, PCT Pub. Date Dec. 23, 2021.
Claims priority of application No. 202041025174 (IN), filed on Jun. 15, 2020.
Prior Publication US 2023/0141299 A1, May 11, 2023
Int. Cl. C08F 220/18 (2006.01); C01G 21/16 (2006.01); C10G 21/16 (2006.01); C10G 73/12 (2006.01); C10M 101/02 (2006.01); C10M 177/00 (2006.01); C10N 70/00 (2006.01)
CPC C08F 220/1818 (2020.02) [C01G 21/16 (2013.01); C10G 73/12 (2013.01); C10M 101/02 (2013.01); C10M 177/00 (2013.01); C10G 2300/304 (2013.01); C10G 2400/10 (2013.01); C10M 2203/1006 (2013.01); C10N 2070/00 (2013.01)] 20 Claims
 
1. A crosslinked polymer for dewaxing lubricating oils, the polymer consisting of:
(a) 70-77 weight percentage of at least one alkyl acrylate;
(b) 23-28 weight percentage of at least one vinyl aromatic hydrocarbon;
(c) 0.1-2.5 weight percentage of at least one crosslinker; and
(d) 0.75-2.5 weight percentage of at least one initiator,
wherein the polymer has a number average molecular weight in the range of 5000-15000 and wherein the crosslinker is selected from the group consisting of cyclopentadiene, diallyl ether, divinyl benzene, divinyl ether, and combinations thereof.