Process for surface modified hollow microspheres

Details Process for surface modified hollow microspheres Process for surface modified hollow microspheres

1982-05-27

1983-10-25

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

Coated particles

264233, 264340, 428402, 428406, 501 35, B29C 2500

Patent

active

044118473

ABSTRACT:
Non-fused hollow glass microspheres that consist primarily of silicate are rendered more water-resistant by treatment with multivalent metals. The hollow microspheres are slurried with water and then a solution of a multivalent metal salt such as Al.sub.2 (SO.sub.4).sub.3 is added to the slurry. The rate of the addition is controlled so that the pH can be regulated. Separating, washing and drying complete the preparation.

REFERENCES:
patent: 3337321 (1967-08-01), Teague et al.
patent: 3794503 (1974-02-01), Netting
patent: 3796777 (1974-03-01), Netting
patent: 3888957 (1975-06-01), Netting

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