Method of producing hollow, heat-resistant beads

Details Method of producing hollow, heat-resistant beads Method of producing hollow, heat-resistant beads

1994-12-09

1996-10-08

Fiorilla, Christopher A.

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

Utilizing centrifugal force or rotating forming zone

264 13, 264414, 264430, 264432, 264 42, 264140, B29B 900, B29C 6500

Patent

active

055628702

ABSTRACT:
Novel hollow beads are characterized in that they contain aluminium phosphates optionally containing boron. They can be produced by first drying, at from 20.degree. to 200.degree. C., reaction products of acid aluminium phosphates (and optionally boric acid) with amines, then comminuting them and finally subjecting them to a heat shock of from 200.degree. to 1200.degree. C. Such hollow beads can be used for a great variety of purposes.

REFERENCES:
patent: 4364855 (1982-12-01), McDaniel et al.
patent: 4444965 (1984-04-01), McDaniel et al.
patent: 5324697 (1994-06-01), Mueller et al.

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