Method of making small hollow glass spheres

Details Method of making small hollow glass spheres Method of making small hollow glass spheres

1990-12-20

1991-12-03

Lindsay, Robert L.

Glass manufacturing

Processes

Self-supporting particle making

65 22, 264 42, 501 39, C03B 1910

Patent

active

050697021

ABSTRACT:
Small hollow glass spheres are prepared by adding a surfactant to a liquid glass precursor mixture. The surfactant-containing solution or dispersion can be formed into droplets which are directed into a heated zone and the product collected in a cooler zone. Alternately, the solution or dispersion may be spray-dried, and the spray-dried product is fed into the heated zone and collected in the cooler zone. Nonionic fluorocarbon surfactants are the preferred surfactants.

REFERENCES:
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patent: 2978340 (1961-04-01), Veatch et al.
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patent: 3365315 (1968-01-01), Beck et al.
patent: 4133854 (1979-01-01), Hendricks
patent: 4257799 (1981-04-01), Rosenewaig et al.
patent: 4442175 (1984-10-01), Flannery et al.
patent: 4661137 (1987-04-01), Garnier et al.
patent: 4778502 (1988-10-01), Garnier et al.
patent: 4822534 (1989-04-01), Lencki et al.
Glass Microbaloon Particles for Construction Materials Ceramics Age, Apr. 1962, pp. 55, 56 and 58.

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