Binders based upon solutions of alkali metal silicates

Details Binders based upon solutions of alkali metal silicates Binders based upon solutions of alkali metal silicates

1980-11-06

1982-07-27

Hayes, Lorenzo B.

Compositions: coating or plastic

Coating or plastic compositions

Molds and mold coating compositions

106 385R, 106 80, 106 84, 106162, 164 16, B28B 734

Patent

active

043415598

ABSTRACT:
This invention is directed to binder compositions based upon aqueous solutions of alkali metal silicates. More particularly, this invention is directed to binder compositions consisting essentially of (a) aqueous alkali metal silicate solutions having a molar ratio of SiO.sub.2 :Me.sub.2 O of from about 2.0:1 to 3.4:1, with Me signifying an alkali metal, and a solids content of from about 35 to 50 percent by weight, based on the weight of the total alkali metal solution, and (b) from about 0.1 to 10 percent by weight, based upon the weight of the total binder composition, of at least one reductively aminated mono-, di-, or oligosaccharide, and the use of such binder compositions in the preparation of molds or cores for metal casting.

REFERENCES:
patent: 2016962 (1935-10-01), Flint
patent: 2182929 (1939-12-01), Werntz
patent: 2926098 (1960-02-01), Ilenda et al.
patent: 4194918 (1980-03-01), George et al.

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