Aqueous release agent and lubricant
AssigneePennwalt Corporation
InventorJerome W. Bertell
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Abstract
A release agent and lubricant composition particularly suitable for die casting operations includes a combination of an alkali metal salt of an aromatic polycarboxylic acid, such as phthalic acid, and an alkali metal salt of an aliphatic polycarboxylic acid such as adipic acid. Other additives may be present including thickeners, preservatives, surfactants, pigments, corrosion inhibitors, and dyes.
Claims20
An aqueous release agent and lubricant comprising water and from about 0.15 to 30 percent by weight of composition of alkali metal salt of an aromatic polycarboxylic acid and from about 0.015 to 15 percent by weight of composition of an alkali metal salt of an aliphatic polycarboxylic acid such that the weight ratio of aromatic polycarboxylic salt acid salt to aliphatic polycarboxylic acid salt ranges from about 50/50 to about 95/5.
A hot forming process for metal comprising applying an aqueous release agent and lubricant comprising water and from about 0.15 to 30 percent by weight of composition of alkali metal salt of an aromatic polycarboxylic acid and from about 0.015 to 15 percent by weight of composition of an alkali metal salt of an aliphatic polycarboxylic acid such that the weight ratio of aromatic polycarboxylic acid salt to aliphatic polycarboxylic acid salt ranges from about 50/50 to about 95/5 to the surface of a hot die so as to form a dry film on said surface, placing the metal in the die, forming the metal into a solid shape which conforms to the die, and removing the solid shaped metal from the die.
Dependencies are inferred from the claim text.