US 11,702,580 B2
Coolant for cooling systems in electric vehicles having fuel cells and/or batteries containing azole derivatives and additional corrosion protectants
Harald Dietl, Ludwigshafen (DE); and Roger Sieg, Ludwigshafen (DE)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Filed by BASF SE, Ludwigshafen am Rhein (DE)
Filed on Jan. 4, 2022, as Appl. No. 17/567,963.
Application 17/567,963 is a continuation of application No. 16/461,696, granted, now 11,248,155, previously published as PCT/EP2017/079162, filed on Nov. 14, 2017.
Claims priority of application No. 16200197 (EP), filed on Nov. 23, 2016.
Prior Publication US 2022/0127510 A1, Apr. 28, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 5/20 (2006.01); H01M 10/613 (2014.01); H01M 10/625 (2014.01); H01M 10/6567 (2014.01); H01M 8/04029 (2016.01); H01M 8/04701 (2016.01); C09K 5/08 (2006.01); C09K 5/00 (2006.01); C09K 5/10 (2006.01)
CPC C09K 5/20 (2013.01) [C09K 5/00 (2013.01); C09K 5/08 (2013.01); C09K 5/10 (2013.01); H01M 8/04029 (2013.01); H01M 8/04701 (2013.01); H01M 10/613 (2015.04); H01M 10/625 (2015.04); H01M 10/6567 (2015.04); H01M 2220/20 (2013.01); H01M 2250/20 (2013.01)] 19 Claims
 
1. A coolant composition having a conductivity of not more than 50 μS/cm, the coolant composition comprising:
at least one alkylene glycol or derivative thereof;
one or more five-membered heterocyclic compounds, which are azole derivatives, and which have 2 or 3 heteroatoms selected from the group consisting of nitrogen and sulfur, and comprise no or at most one sulfur atom and can bear an aromatic or saturated six-membered fused-on ring;
ion free water;
at least one compound of formula (V)

OG Complex Work Unit Chemistry
wherein
R1 is an organic radical having from 7 to 21 carbon atoms,
n is a positive integer from 10 to 60, and
each Xi for i=1 to n is selected independently from the group consisting of —CH2—CH2—O—, —CH2—CH(CH3)—O—, —CH(CH3)—CH2—O—, —CH2—C(CH3)2—O—, —C(CH3)2—CH2—O—, —CH2—CH(C2H5)—O—, —CH(C2H5)—CH2—O—, —CH(CH3)—CH(CH3)—O—, —CH2—CH2—CH2—O—, and —CH2—CH2—CH2—CH2O—; and
optionally, at least one ortho-silicic ester.