Investment wax

Details Investment wax Investment wax

1974-12-26

1976-06-22

Hayes, Lorenzo B.

Compositions: coating or plastic

Coating or plastic compositions

Molds and mold coating compositions

106 387, 106 388, 106219, 106230, 106268, 106270, 260 233, 260 285A, B28B 734, C08L 9106

Patent

active

039649156

ABSTRACT:
An improved pattern material for the production of precision investment casting molds, the pattern material being characterized by a low injection temperature, a low coefficient of expansion and insubstantial cavitation after injection into a pattern die. The pattern comprises a mixture in which the predominating constituent is a mixture of stearic and palmitic acids, a thermoplastic resin which is compatible with the fatty acid-wax mixture employed in an amount less than the aforementioned mixture of fatty acids, a wax having a melting point by the ball and ring method of from 160.degree. to 180.degree.F (71.degree. to 82.degree.C) in an amount less than that of the thermoplastic resin, a fatty acid amide slip agent in an amount less than the amount of wax and a relatively small amount of at least one metal stearate.

REFERENCES:
patent: 2348687 (1944-05-01), Abrams et al.
patent: 2795505 (1957-06-01), Finck et al.
patent: 3140268 (1964-07-01), Halpern et al.
patent: 3655414 (1972-04-01), Hoffman
patent: 3704145 (1972-11-01), Ware et al.
patent: 3748155 (1973-07-01), Speyer
patent: 3854962 (1974-12-01), Speyer

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