Silicate-, borate-and phosphate-free cooling fluids based on glycols and having improved corrosion behavior
AssigneeClariant GmbH
InventorsPeter Minks, Johann Schuster
Life of this patent
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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.
Claims8
A coolant concentrate comprising
- a) from 0.1 to 6% by weight of at least one monocarboxylic acid having from 4 to 16 carbon atoms in the form of alkali metal salts, at least one dicarboxylic acid having from 4 to 16 carbon atoms in the form of alkali metal salts, or a combination thereof,
- 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) optionally, up to 4% by weight of water, and
- f) a glycol to 100% by weight,
- in each case based on the total weight of the concentrate.
A coolant comprising from 10 to 90% by weight of water and a coolant concentrate as claimed in claim 1 to 100% by weight.
Dependencies are inferred from the claim text.