Urethane binder compositions for foundry applications

Details Urethane binder compositions for foundry applications Urethane binder compositions for foundry applications

2006-10-10

2006-10-10

Szekely, Peter (Department: 1714)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S143000, C524S145000, C560S026000, C560S330000

Reexamination Certificate

active

07119131

ABSTRACT:
Foundry cores and molds for casting metals are prepared by forming a binder comprising a polyol, an isocyanato urethane polymer and a urethane catalyst. The binder additives and resin formulations of the invention are especially useful for casting non-ferrous metals, for example, the casting of aluminum, magnesium and other lightweight metals. The cores and molds produced for casting aluminum and other lightweight metals exhibit excellent shakeout while retaining other desirable core and mold properties.

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