Process for casting lightweight metals

Details Process for casting lightweight metals Process for casting lightweight metals

1983-01-24

1984-05-15

Cockeram, H. S.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

164526, 528 76, 528 78, 528 79, C08G 1850, B22C 122

Patent

active

044489072

ABSTRACT:
No Bake foundry cores and molds for casting metals are prepared by using a binder comprising a polyol generally derived from alkoxylating an amine compound and a polyisocyanate. The binder is especially useful for casting non-ferrous metals, for example, the casting of aluminum, magnesium and other light weight metals. The cores and molds produced for casting aluminum and other light weight metals exhibit excellent shakeout while retaining other desirable core and mold properties. In addition the binders of this invention would have been observed to have an autocatalytic nature.

REFERENCES:
patent: 2422118 (1947-06-01), Meyer
patent: 2953533 (1960-09-01), Khawam
patent: 3428110 (1969-02-01), Walker et al.
patent: 3574167 (1971-04-01), Case et al.
patent: 3933727 (1976-01-01), Schmid
patent: 4079031 (1978-03-01), Sardessai et al.
patent: 4293480 (1981-10-01), Martin et al.
"Unofficial" (Uncertified) Translation of Japanese Patent Specification 49-10569 (Mar. 12, 1974), Aoki et al, Assignors to Hodogaya Chem. Co., Tokyo.

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