Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1995-05-16
1997-03-18
Sellers, Robert E.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524557, 524596, B22C 0122
Patent
active
056123922
ABSTRACT:
This invention relates to a heat cured foundry binder system comprising as separate components (A) a furan resin, and (B) an effective amount of a curing catalyst composition comprising water, a copper aryl sulfonate, a aryl sulfonic acid, preferably polyvinyl alcohol, and a copper halide.
REFERENCES:
patent: 4162238 (1979-07-01), Bergna
patent: 4317763 (1982-03-01), Menting
patent: 4318840 (1982-03-01), Doyle et al.
patent: 4451577 (1984-05-01), Coss
patent: 4761441 (1988-08-01), Woodson
patent: 4929649 (1990-05-01), Torbus et al.
patent: 5457142 (1995-10-01), Dando et al.
Chang Ken K.
Dando Thomas E.
Haugse A. Leonard
Ashland Inc.
Hedden David L.
Sellers Robert E.
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