Antifreeze/coolant composition containing cinnamic acid

Details Antifreeze/coolant composition containing cinnamic acid Antifreeze/coolant composition containing cinnamic acid

1998-03-10

1999-10-05

Skane, Christine

Compositions

Heat-exchange, low-freezing or pour point, or high boiling...

Organic components

252 79, C09K 500

Patent

active

059618752

ABSTRACT:
An antifreeze/coolant position is disclosed, which can effectively inhibit corrosion of metals, particularly cast aluminum and cast iron, and can also inhibit cavitation damage to metals in an engine cooling system. The anitifreeze/coolant composition comprises a glycol as the chief ingredient, 0.1-0.5% by weight of at least on ingredient selected from among C.sub.6 -C.sub.12 aliphatic monobasic acids and their salts, and 0.1-5.0% by weight of at least one ingredient selected from among cinnamic acid, alkylcinnamic acids, alkoxycinnanic acids and their salts.

REFERENCES:
patent: 2173689 (1939-09-01), Lamprey
patent: 4851145 (1989-07-01), Van Neste et al.
Hersch et al, "An Experimental Survey of Rust Preventatives in Water: II. The Screening of Organic Inhibitors", Journal of Applied Chemistry, pp. 251-265, Jul. 1961.
Mercer, "The Properties of Carboxylates as Corrosion Inhibitors for Steel and Other Metals in Neutral Aqueous Solutions", 5th European Symposium on Corrosion Inhibitors, Ferrara, Italy, pp. 563-581, Sep. 1980.

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