	US 12,215,272 B2
	Heat transfer fluids and corrosion inhibitor formulations for use thereof
Bo Yang, Ridgefield, CT (US); and Peter M. Woyciesjes, Danbury, CT (US)
Assigned to Prestone Products LLC, Wilmington, DE (US)
Appl. No. 17/437,217
Filed by PRESTONE PRODUCTS CORPORATION, Danbury, CT (US)
PCT Filed Mar. 6, 2020, PCT No. PCT/US2020/021523 § 371(c)(1), (2) Date Sep. 8, 2021, PCT Pub. No. WO2020/185611, PCT Pub. Date Sep. 17, 2020.
Claims priority of provisional application 62/815,747, filed on Mar. 8, 2019.
Prior Publication US 2022/0169906 A1, Jun. 2, 2022
Int. Cl. C09K 5/20 (2006.01); C09K 15/30 (2006.01); C23F 11/14 (2006.01); H01M 8/04029 (2016.01); H01M 8/04701 (2016.01)

CPC C09K 5/20 (2013.01) [C09K 15/30 (2013.01); C23F 11/149 (2013.01); H01M 8/04029 (2013.01); H01M 8/04701 (2013.01)]

45 Claims

1. A heat transfer fluid concentrate comprising:

a freezing point depressant; and

a non-ionic surfactant comprising (i) a corrosion inhibitor for copper and copper alloys and (ii) a polyalkylene glycol;

wherein a conductivity of the heat transfer fluid concentrate is less than or equal to about 100 μS/cm and wherein the heat transfer fluid concentrate is free of siloxane-polyether copolymers.