Silicate-, borate- and nitrate-free antifreeze concentrates...

Details Silicate-, borate- and nitrate-free antifreeze concentrates... Silicate-, borate- and nitrate-free antifreeze concentrates...

C - Chemistry, Metallurgy

09

K

C09K 5/00 (2006.01) C09K 5/20 (2006.01)

Patent

CA 2208731

The present invention relates to novel silicate-, borate- and nitrate-free antifreeze concentrates based on alkylene glycols or derivatives thereof which include an inhibitor combination essentially comprising salts of carboxylic acids together with hydrocarbon-triazoles and/or -thiazoles. These antifreeze concentrates are, in particular, entirely free from any salts of inorganic acids as corrosion inhibitors. The invention also relates to ready-to-use aqueous coolant compositions comprising these antifreeze concentrates.

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