Method of preparing hydrophobic silica

Details Method of preparing hydrophobic silica Method of preparing hydrophobic silica

1976-10-07

1977-10-18

Cooper, Jack

Coating processes

Particles, flakes, or granules coated or encapsulated

Inorganic base

106288B, 106308B, 423267, 423335, 427255, C01B 3318, C09C 300

Patent

active

040546896

ABSTRACT:
Amorphous silica is rendered hydrophobic by treating the silica with hydrogen fluoride vapors. The hydrophobic silica thus produced is useful in applications wherein either the sorbed fluoride values are desired or else the hydrophobic properties are desired. The hydrophobic properties are overcome by extended contact with water and the silica then becomes hydrophilic.

REFERENCES:
patent: 2657149 (1953-10-01), Iler
patent: 2705206 (1955-03-01), Wagner
patent: 2805958 (1957-09-01), Bueche et al.
patent: 2973282 (1961-02-01), Gross
patent: 3274011 (1966-09-01), Duke
patent: 3862307 (1975-01-01), Giulio

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