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US 5,290,469 AGranted
Glycol-based polycarboxylate-containing antifreeze/coolant formulations for resisting cavitation erosion-corrosion on aluminum
AssigneeBASF SE
InventorsDavid E. Turcotte, John J. Conville, James T. Lyon, Stanley T. Hirozawa, Shrikant V. DeSai
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Abstract
The present invention provides an antifreeze/coolant composition with polymeric polycarboxylates which reduces the corrosion rate of heat rejecting aluminum, and is effective at relatively low concentrations.
Claims8
A glycol-based automotive antifreeze/coolant solution which reduces the corrosion rate of heat rejecting aluminum or aluminum alloy including a corrosion rate reducing effective amount of a polycarboxylate additive which is at least one of (i) a sodium salt of a copolymer of acrylic acid and maleic acid, and (ii) a secondary alcohol modified polyacrylic acid.
Dependencies are inferred from the claim text.