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...

2006-06-08

2008-09-02

Ogden, Necholus (Department: 1796)

Compositions

Heat-exchange, low-freezing or pour point, or high boiling...

C252S073000, C252S075000, C429S006000, C429S006000, C429S120000

Reexamination Certificate

active

07419618

ABSTRACT:
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.

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