Freezing-point-lowering composition and method
AssigneeLang & Co., Chemisch-Technische Produkte Kommanditgesellschaft
InventorGertrude Kaes
Life of this patent
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Abstract
The freezing point of an aqueous system is lowered by adding to the system a freezing point lowering quantity of at least one and preferably two or more water soluble salts of dicarboxylic acids having at least three carbon atoms, specifically a dicarboxylic acid selected from the group which consists of adipic, glutaric, succinic and malonic acids, the salt being a sodium, potassium, ammonium or organoamine salt.
Claims7
A method of lowering the freezing point of an aqueous system which comprises the step of adding to said system a freezing point lowering quantity of at least one water soluble salt of at least one dicarboxylic acid having at least three carbon atoms.
In an antifreezing and ice melting composition, the improvement wherein an active antifreezing and ice melting component of said composition is at least one water soluble sodium, potassium, ammonium or organoamine salt of at least one dicarboxylic acid having at least three carbon atoms together with at least one further antifreezing and ice dissolving compound selected from the group which consists of urea, inorganic ammonium compounds, and water soluble phosphates.
Dependencies are inferred from the claim text.