Hardener for water glass cements

Details Hardener for water glass cements Hardener for water glass cements

1982-08-13

1984-11-13

Doll, John

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

23293R, 23293A, 106314, 423306, C01B 2526

Patent

active

044823800

ABSTRACT:
Aqueous solutions containing phosphate, aluminum and iron are evaporated. Thus, acidic phosphates having an atomic ratio Al:Fe of 95:5 to 5:95 and an atomic ratio P:(Al+Fe) of 1.1:1 to 3:1 are obtained. These are thermally treated by heating them in a first step to a temperature not exceeding 400.degree. C. until their weight remains constant, and in a second step to a temperature not exceeding 750.degree. C., likewise until their weight remains constant. The tempered phosphate so obtained is suitable as hardener for water glass cements.

REFERENCES:
patent: 2550490 (1951-04-01), McDonald
patent: 3327012 (1967-06-01), Noddings et al.
patent: 3445257 (1969-05-01), Hloch et al.

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