Polyurethane-forming binder systems containing 2,2'-dipyridyl, 1

Details Polyurethane-forming binder systems containing 2,2'-dipyridyl, 1 Polyurethane-forming binder systems containing 2,2'-dipyridyl, 1

1993-07-23

1995-09-05

Michl, Paul R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523143, 524508, 524509, 528 65, 528 85, B22C 122

Patent

active

054479681

ABSTRACT:
This invention relates to polyurethane-forming foundry binder systems which contain a nitrogen-containing aromatic compound selected from the group consisting of 2,2'-dipyridyl, 1,10-phenanthroline, and their substituted alkyl derivatives. The foundry binder systems are particularly useful for making foundry mixes used in the cold-box fabrication process for making foundry shapes. However, the binders systems can also be used to hold foundry shapes, such as molds and cores, together in an assembly.

REFERENCES:
patent: 3409579 (1968-11-01), Robins
patent: 3485797 (1969-12-01), Robins
patent: 4268425 (1981-05-01), Gardikes
patent: 4692479 (1987-09-01), Schneider et al.
patent: 4724892 (1988-02-01), Schneider et al.

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