Improved foundry process and binder resin composition therefor

Details Improved foundry process and binder resin composition therefor Improved foundry process and binder resin composition therefor

1976-07-14

1978-03-14

Cockeram, H.S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

164 43, 252182, 260 332R, 260 336UB, 260 47CB, 260 775AP, 260DIG40, 260 775AB, 260 775AC, C08G 810, C08G 1848, B22C 122, C08K 506

Patent

active

040790312

ABSTRACT:
An improved binder resin is disclosed for use in a foundry process, comprising a major proportion of a resole phenolic resin and a minor proportion of a polyether polyol and a mutual solvent therefor, wherein the polyol has an average molecular weight between about 200 and 5000 and a hydroxy functionality of about 2 to 4. The improved binder is used in the foundry process by mixing it with a polyisocyanate and preferably an amine catalyst.

REFERENCES:
patent: 3106540 (1963-10-01), Freedman
patent: 3288745 (1966-11-01), Hempel et al.
patent: 3409579 (1968-11-01), Robins
patent: 3598771 (1971-08-01), Davis et al.
patent: 3676392 (1972-07-01), Robins
patent: 3702316 (1972-11-01), Robins
patent: 3726867 (1973-04-01), Robins
patent: 3933727 (1976-01-01), Schmid

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