Patent · US Expired

Binders based upon solutions of alkali metal silicates

US4341559A · kind A · utility

14Cited by

4References

10Claims

0Family size

Assignee

Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

Wolfgang Friedemann · Neuss, DE
Norbert Maak · Neuss, DE
Kurt Feulner · Essen, DE

Key dates

Filing date	Nov 6, 1980
Grant date	Jul 27, 1982
Priority date	—
Expiry date	Nov 6, 2000

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B28/26
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.