Cooling agents for cooling systems in fuel cell drives

Details Cooling agents for cooling systems in fuel cell drives Cooling agents for cooling systems in fuel cell drives

2008-07-01

2008-07-01

Ogden, Necholus (Department: 1796)

Compositions

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

C252S073000, C252S075000, C429S006000, C429S006000, C429S120000

Reexamination Certificate

active

10450943

ABSTRACT:
The invention relates to antifreeze concentrates for cooling systems in fuel cell drives, from which are produced ready-to-use aqueous cooling agent compositions having a maximum conductivity of 50 μs/cm, based on alkylene glycols or the derivatives thereof, and containing orthosilicic acid esters of formula (I) wherein the variables R1to R4are the same or different and represent C1-C20alkyl substituents, C2-C20alkenyl substituents, C1-C20hydroxyalkyl substituents, optionally substituted C6-C12aryl substituents and/or glycol ether substituents of formula (CH2—CH2—O)n—R5wherein R5represents hydrogen or C1-C5alkyl and n represents a number between 1 and 5

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Derwent Abstract 99-420101 Aktiver Korrosionsschutz in Wabrigen Medien, Reinhard pp. 78-98, 1995.

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