Ester cured no-bake foundry binder system

Details Ester cured no-bake foundry binder system Ester cured no-bake foundry binder system

1993-10-04

1995-06-13

Clark, W. Robinson

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

Synthetic resins

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

525390, 525508, 524594, 524736, 524492, 523145, 528129, C08L 6110, C08L 6106, B22C 902

Patent

active

054243769

ABSTRACT:
The invention relates to an ester cured no-bake foundry binder system preferably comprising as separate components (a) an aqueous basic solution of a phenolic resole resin; and (b) a hardener comprising (i) a polyphenol resin, and (ii) a liquid ester. Alternatively, the polyphenol resin can be used as a separate component. The foundry binder systems produce foundry shapes with improved tensile strengths when compared to foundry shapes which are prepared from foundry binder systems which do not contain a polyphenol resin.

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patent: 5153298 (1992-10-01), Pokora
patent: 5178762 (1993-01-01), Pokora et al.

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