Polycarboxylate-containing antifreeze/coolant additive for use in hard water applications
AssigneeBASF SE
InventorsDavid E. Turcotte, John J. Conville, James T. Lyon, Richard J. Holland, Stanley T. Hirozawa
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Abstract
The present invention provides an antifreeze/coolant additive comprising polymeric polycarboxylates which prevents hard water precipitants and scale formation, is soluble in alcohol and alcohol/water mixtures, is compatible with other commonly used antifreeze/coolant components, does not corrode or damage automotive cooling systems and is effective at relatively low concentrations.
Claims8
A glycol-based automotive antifreeze/coolant solution for use in hard water including a glycol-soluble 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.