Shell process foundry resin compositions

Details Shell process foundry resin compositions Shell process foundry resin compositions

1978-03-22

1980-08-05

Person, S. M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

428407, C08K 334, C08K 336

Patent

active

042161339

ABSTRACT:
Shell process foundry resin compositions containing novolak resins are improved by incorporating therein from about 0.5 to about 10 percent, based on the weight of the resin, of a finely divided, siliceous material such as fumed silica, bentonite, kaolin clay and attapulgus clay. The presence of the siliceous material provides resistance to peelback during the formation of sand shells and increases the stripping strengths of the incompletely cured molds.

REFERENCES:
patent: 3453229 (1969-07-01), Steck
patent: 3660121 (1972-05-01), McCarthy
patent: 3838095 (1974-09-01), Johnson et al.
patent: 3954695 (1976-05-01), Clelond
patent: 4048134 (1977-09-01), Courtenay et al.
patent: 4163741 (1979-08-01), Zhukonsky et al.

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