Hollow microspheres with organosilicon-silicate walls

Details Hollow microspheres with organosilicon-silicate walls Hollow microspheres with organosilicon-silicate walls

1984-02-27

1985-09-10

Lesmes, George F.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

264 13, 428405, 428406, 428429, B32B 516

Patent

active

045406294

ABSTRACT:
Hollow microspheres of reduced surface energy and reactivity and of improved packing and sphericity are prepared by simultaneously forming said microspheres and reacting them with an organosilicon compound. The microspheres are prepared by spray drying a solution of alkali metal silicate and a "polysalt." The organosilicon is present as the microspheres are formed, penetrates and reacts to form a shell consisting of a silicate, polysalt and the organosilicon compound. The resulting product is more discrete, more free-flowing, has better packaging characteristics, improved packing factor and improved filler properties when compared to prior-art microspheres.

REFERENCES:
patent: 3110614 (1963-11-01), de Vries
patent: 3794503 (1974-02-01), Netting
patent: 4039331 (1977-08-01), Lee
patent: 4175159 (1979-11-01), Raleigh
patent: 4338375 (1982-07-01), Hashimoto et al.
patent: 4411847 (1983-10-01), Netting et al.

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