Release agents
AssigneeGene Conreaux & Co., Inc.
InventorDonald S. Carter
Life of this patent
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Abstract
A release agent for separation of a pattern from a mold cavity or core or the like. The agent consists essentially of an organosiloxane polymer fluid, comminuted aluminum, and a fluorocarbon solvent. Illustratively, the agent may include 0.6% by weight of the organosiloxane polymer fluid. The illustrative organosiloxane polymer has a viscosity of approximately 12,500 centistokes. The illustrative agent includes 3.6% by weight of an aluminum paste including approximately 65-75%, by weight, of finely divided pigment-grade aluminum and 25-35% of mineral spirits vehicle. The fluorocarbon preferably is a non-propellant grade fluorocarbon such as trichlorotrifluoroethane.
Claims15
A release agent used to separate patterns and core boxes from foundry molds and cores consisting essentially of a comminuted material selected from the group consisting of aluminum, copper, brass, bronze, graphite, talc and mica, or mixtures thereof, a non-thermosetting organosiloxane polymer fluid to promote adherence of the comminuted material to a pattern or core box, and a solvent vehicle from the group consisting of non-propellant grade chlorocarbon of fluorocarbon solvents which is substantially non-reactive with the comminuted material.
A release agent used to separate patterns and core boxes from foundry molds and cores consisting essentially of from about 1% to about 10% by weight comminuted aluminum, from about 0.01% to about 8% by weight of dimethyl siloxane polymer fluid with a viscosity of about 12,500 centistokes to promote adherence of the comminuted material to a pattern or core box, and the balance a non-propellant grade chlorofluorocarbon solvent vehicle which is substantially non-reactive with the comminuted aluminum.
Dependencies are inferred from the claim text.