Surface modified hollow microspheres

Details Surface modified hollow microspheres Surface modified hollow microspheres

1980-06-20

1982-07-20

Hess, Bruce H.

Stock material or miscellaneous articles

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

Particulate matter

65 214, 264 13, 428325, 428406, 428426, B32B 516, C03B 1910

Patent

active

043406424

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
patent: 3794503 (1974-02-01), Netting
patent: 3796777 (1974-03-01), Netting
patent: 3888957 (1975-06-01), Netting

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