Coolant comprising azole derivatives for cooling systems in...

Details Coolant comprising azole derivatives for cooling systems in... Coolant comprising azole derivatives for cooling systems in...

C - Chemistry, Metallurgy

09

K

C09K 5/20 (2006.01) H01M 8/04 (2006.01)

Patent

CA 2449208

An antifreeze concentrate for cooling systems in fuel-cell drives which gives ready-to-use aqueous coolant compositions having a conductivity of at most 50 µS/cm, based on alkylene glycols or derivatives thereof and containing one or more five-membered heterocyclic compounds (azole derivatives) having 2 or 3 hetero atoms from the group consisting of nitrogen and sulfur, which contain no or at most one sulfur atom and which may carry a fused aromatic or saturated six-membered ring.

L'invention concerne des concentrés antigels destinés à des systèmes de refroidissement dans des entraînements à piles à combustible et à partir desquels on peut réaliser des compositions réfrigérantes aqueuses prêtes à l'emploi ayant une conductivité d'au plus 50 µS/cm à base d'alkylèneglycols ou de leurs dérivés. Les concentrés antigels selon l'invention contiennent un ou plusieurs composés hétérocycliques à cinq chaînons (dérivés d'azole) qui présentent 2 ou 3 hétéroatomes du groupe azote et soufre, qui ne contiennent pas d'atome de soufre ou qui en contiennent au plus un et qui peuvent porter un agent cyclisant aromatique ou saturé à 6 chaînons.

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