Antifreeze/coolant composition containing cinnamic acid
AssigneeCCI Corporation
InventorsYuji Miyake, Yasuaki Mori
Life of this patent
Estimating the term…
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.
Claims7
An antifreeze/coolant composition consisting essentially of a glycol as the main ingredient, about 0.1-5.0% by weight of at least one ingredient selected from the group consisting of C.sub.6 -C.sub.22 aliphatic monobasic acids and their salts, and about 0.1-5.0% by weight of at least one ingredient selected from the group consisting of cinnamic acid, alkylcinnamic acids, alkoxycinnanic acids of the chemical formula given below and their salts, ##STR3## where R is a Hydrogen atom, C.sub.1 -C.sub.5 alkyl group, or C.sub.1 -C.sub.5 alkoxy.
Dependencies are inferred from the claim text.