Coating compositions for metal casting molds

Details Coating compositions for metal casting molds Coating compositions for metal casting molds

1981-03-06

1982-03-16

Hayes, Lorenzo B.

Compositions: coating or plastic

Coating or plastic compositions

Molds and mold coating compositions

106 3822, 164 33, 427134, 427135, 501105, 501107, 501129, B28B 736

Patent

active

043199259

ABSTRACT:
A composition for coating the molding surfaces of molds for casting metal parts comprising an aqueous dispersion containing finely divided zirconia, a colloidal silica composition, finely divided mica, finely divided zircon, finely divided bentonite and, optionally, an inert coloring agent. While capable of protecting the molding surfaces against high temperature molten metal and producing castings having substantially defect-free surfaces, the coating composition provides cleaner castings by partially attaching to the casting and spalling off as the casting cools.

REFERENCES:
patent: 1886249 (1932-11-01), Bensing
patent: 2544598 (1951-03-01), Kalina
patent: 3059296 (1962-10-01), North
patent: 3243397 (1966-03-01), Hermkimer et al.
patent: 3436235 (1969-04-01), Baer, Jr. et al.
patent: 3447936 (1969-06-01), Ornitz
patent: 3859153 (1975-01-01), Beyer et al.

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