Binder composition for foundry sand molds and cores

Details Binder composition for foundry sand molds and cores Binder composition for foundry sand molds and cores

1981-10-02

1982-10-05

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525521, C08G 1864, C08G 1854

Patent

active

043529143

ABSTRACT:
A novel binder composition for foundry sand molds or cores comprises (a) an organic polyisocyanate compound and (b) a certain polyol compound selected from a formaldehyde-modified bisphenol and a formaldehyde-modified cyclic ketone, or a partially alkoxylated derivative of the polyol compound, the ratio of the component (a) to the component (b) being in the specific range.

REFERENCES:
patent: 3409579 (1968-11-01), Robins
patent: 3676392 (1972-07-01), Robins
patent: 3702316 (1972-11-01), Robins
patent: 3726867 (1973-04-01), Robins

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