Hydraulic cements prepared from glass powders

Details Hydraulic cements prepared from glass powders Hydraulic cements prepared from glass powders

1982-09-27

1984-04-03

Poer, James

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 75, 501 55, 501 68, C04B 700

Patent

active

044405766

ABSTRACT:
The present invention is concerned with the preparation of hydraulic cements, demonstrating high mechanical strength, long term resistance to attack by moisture, and virtual freedom from creep, from glass powders consisting essentially, expressed in terms of mole percent on the oxide basis, of about 60-76% SiO.sub.2, 15-30% K.sub.2 O, and 2-15% total of at least one metal oxide selected from the group of 0-10% Al.sub.2 O.sub.3, 0-5% V.sub.2 O.sub.5, 0-5% TiO.sub.2, 0-5% MoO.sub.3 and 0-5% WO.sub.3. The cements exhibit particular utility in forming strong cellular ceramic articles. The glass powders may contain a phosphate component in which case the composition ranges are limited to 68-76% SiO.sub.2, 18-24% K.sub.2 O, 2-4.5% P.sub.2 O.sub.5 with the molar ratio K.sub.2 O:P.sub.2 O.sub.5 ranging between 5 and 10, and 2-5% total of at least one metal oxide selected from the group of Al.sub.2 O.sub.3, MoO.sub.3, V.sub.2 O.sub.5 and WO.sub.3.

REFERENCES:
patent: 3498802 (1970-03-01), Bickford et al.
patent: 3720527 (1973-03-01), Farrauto et al.
patent: 3743525 (1973-07-01), Farrauto et al.
patent: 3811853 (1974-05-01), Bartholomew et al.

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