US 12,187,956 B2
Low glass transition temperature polymer latex drag reducing agent
Stuart N. Milligan, Ponca City, OK (US)
Assigned to LiquidPower Specialty Products Inc., Houston, TX (US)
Filed by Liquidpower Specialty Products Inc., Houston, TX (US)
Filed on May 22, 2023, as Appl. No. 18/200,397.
Application 18/200,397 is a division of application No. 17/368,076, filed on Jul. 6, 2021, granted, now 11,692,119.
Application 17/368,076 is a continuation of application No. 16/278,320, filed on Feb. 18, 2019, granted, now 11,084,969, issued on Aug. 10, 2021.
Claims priority of provisional application 62/632,089, filed on Feb. 19, 2018.
Prior Publication US 2023/0287255 A1, Sep. 14, 2023
Int. Cl. C09K 8/035 (2006.01); C08F 220/18 (2006.01); C09K 8/524 (2006.01); F17D 1/16 (2006.01)
CPC C09K 8/035 (2013.01) [C08F 220/1808 (2020.02); C09K 8/524 (2013.01); F17D 1/16 (2013.01); C08F 220/1806 (2020.02); C09K 2208/28 (2013.01)] 18 Claims
 
1. A method of improving the flow of a liquid hydrocarbon, comprising:
adding a terpolymer to the liquid hydrocarbon in an amount sufficient to yield a terpolymer concentration in a range from about 0.1 to about 500 ppmw, wherein the terpolymer comprises:
5 to 45 mole percent of a first monomer selected from styrene, 4-methylstyrene, 4-(tert-butyl)styrene, benzyl methacrylate, phenyl methacrylate, or methyl methacrylate;
10 to 70 mole percent of a second monomer selected from 2-ethylhexyl acrylate, n-butyl acrylate, or isodecyl acrylate; and
10 to 80 mole percent of a third monomer, wherein the third monomer is 2-ethylhexyl methacrylate.