Glass microbubbles

Details Glass microbubbles Glass microbubbles

1987-01-12

1988-08-30

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 32, 501 39, 501 65, C03C 1100, C03C 1200, C03C 1400, C03C 3089

Patent

active

047677260

ABSTRACT:
Glass microbubbles having, on a weight basis, a composition consisting essentially of 70-80% SiO.sub.2, 8-15% CaO, 3-8% Na.sub.2 O, and 2-6% B.sub.2 O.sub.3, and about 0.2-1.5% SO.sub.3 and having a CaO:Na.sub.2 O ratio of 1-3.5. These microbubbles, which are made of significantly less expensive raw materials than conventional products, can also be made with a higher percent "floaters" and a lower average density. Certain substitutions can be made for at least a portion of each of the first three oxides.

REFERENCES:
patent: 2978340 (1961-04-01), Veatch et al.
patent: 3030215 (1962-04-01), Veatch et al.
patent: 3129086 (1964-04-01), Veatch et al.
patent: 3230064 (1966-01-01), Veatch et al.
patent: 3365315 (1968-01-01), Beck et al.
patent: 4391646 (1983-07-01), Howell
patent: 4661137 (1987-04-01), Garnier et al.

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