Polycarboxylate-containing antifreeze/coolant additive for resisting cavitation erosion-corrosion on aluminum
AssigneeBASF SE
InventorsDavid E. Turcotte, James T. Lyon, John J. Conville, Shrikant V. DeSai, Stanley T. Hirozawa
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Abstract
The present invention provides an antifreeze/coolant additive comprising polymeric polycarboxylates which resists cavitation erosion-corrosion of aluminum and aluminum alloys, is effective at relatively low concentrations and at varying pH.
Claims8
A glycol-based automotive antifreeze/coolant solution which resists the cavitation errosion-corrosion of aluminum or aluminum alloys including a cavitation errosion-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.