No-bake foundry mixes and their uses

Details No-bake foundry mixes and their uses No-bake foundry mixes and their uses

1998-11-20

1999-12-21

Wu, David W.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523142, 524590, B22C 122

Patent

active

060050217

ABSTRACT:
This invention relates to polyurethane-forming foundry binder systems and foundry mixes which comprise a foundry aggregate, said foundry binder system, and a liquid amine curing catalyst. The binder system comprises a polyol component containing a polyether polyol and a monomeric glycol, and an organic polyisocyanate component. The foundry mixes are used to prepare foundry shapes made from foundry mixes by a no-bake process.

REFERENCES:
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patent: 4148777 (1979-04-01), LeBar et al.
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patent: 4287930 (1981-09-01), McIntosh et al.
patent: 4358570 (1982-11-01), Tobinaga
patent: 5130404 (1992-07-01), Freeland
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patent: 5455287 (1995-10-01), Carpenter et al.
patent: 5482777 (1996-01-01), Yamakawa et al.
patent: 5668211 (1997-09-01), Dormish
patent: 5688857 (1997-11-01), Chen et al.
Ash, Handbook of Plastic and Rubber Additives, pp. 797-798, p. 432, 1995.

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