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US 2003/0164470 A1Published application
Antifreeze concentrates based on amides, and coolant compositions comprising them and intended for protecting magnesium and magnesium alloys
AssigneeBASF SE
InventorsBernd Wenderoth, Karlheinz Schaker
Life of this patent
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Abstract
The invention relates to antifreeze concentrates which are based on alkylene glycols or derivatives thereof or on glycerin, containing 0.05 to 10 wt. % of one or more cathoxylic acid amides and/or sulfonic acid amides in relation to the total quantity of concentrate.
Claims8
A process for protecting internal combustion engines comprising magnesium or magnesium alloys against corrosion, wherein coolant compositions are used for the cooling systems of the internal combustion engines, which coolant compositions are based on an antifreeze concentrate based on alkylene glycols or their derivatives or on glycerol, containing
- a from 0.05 to 10% by weight, based on the total amount of the concentrate, of one or more carboxamides and/or sulfonamides.
Dependencies are inferred from the claim text.