Patent Number: 6,309,559

Title: Silicate-, borate-and phosphate-free cooling fluids based on glycols and having improved corrosion behavior

Abstract: The invention relates to a coolant concentrate comprising a) from 0.1 to 6% by weight of at least one monocarboxylic and/or dicarboxylic acid having from 4 to 16 carbon atoms in the form of alkali metal salts, b) from 0.02 to 2% by weight of a triazinetriiminocarboxylic acid in the form of its alkali metal salt, c) from 0.02 to 2% by weight of at least one hydrocarbon triazole, d) from 0.01 to 1% by weight of at least one soluble alkaline earth metal salt, e) if desired, up to 4% by weight of water, and f) glycols to 100% by weight, in each case based on the total weight of the concentrate.

Inventors: Minks; Peter (Altotting, DE), Schuster; Johann (Kastl, DE)

Assignee: Clariant GmbH

International Classification: C09K 5/00 (20060101); C23F 11/08 (20060101); C09K 5/20 (20060101); C09K 005/00 (); C09K 005/08 ()

Expiration Date: 10/30/2018