Manufacturing process for hollow microspheres

Details Manufacturing process for hollow microspheres Manufacturing process for hollow microspheres

1982-09-21

1983-12-13

Lesmes, George F.

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

By extrusion spraying or gravity fall through orifice

106 75, 264 14, 264 15, 428402, 428325, 521 56, 521 60, B29C 600

Patent

active

044204426

ABSTRACT:
More perfect, less porous hollow microspheres can be prepared by spray-drying dispersions of film-forming solids that contain certain organic solvents. The organic solvents are water-miscible and have boiling points of 100.degree. C. or more. The solvent is added just prior to spray drying and the resulting product has fewer cracks and/or holes. This improvement is especially beneficial to preparation systems involving alkali metal silicates and "polysalts."

REFERENCES:
patent: 3794503 (1974-02-01), Netting
patent: 3796777 (1974-03-01), Netting
patent: 3888957 (1975-06-01), Netting
patent: 3896196 (1975-07-01), Dickey
patent: 4049593 (1977-09-01), Sato
patent: 4127622 (1978-11-01), Watanabe et al.
patent: 4361624 (1982-11-01), Spivack

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