Process for preparing hydrophobic particles

Details Process for preparing hydrophobic particles Process for preparing hydrophobic particles

1974-05-23

1976-04-06

Douglas, Winston A.

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106308Q, 106308N, C09C 128

Patent

active

039486761

ABSTRACT:
A process for preparing hydrophobic finely divided oxides of metals and/or oxides of silicon comprising activating finely divided particles of oxides of metals and/or oxides of silicon by heating the particles at about 700.degree. - 1000.degree.C for less than about 60 seconds in a stream of inert gas to substantially completely free the particles of not only the physically bonded, but also the chemically bonded water, and contacting the activated particles with at least one organosilicon compound and substantially anhydrous ammonia gas for less than about 60 seconds. The hydrophobic products are useful as fillers in elastomers.

REFERENCES:
patent: 3556830 (1971-01-01), Charrin
patent: 3558337 (1971-01-01), Barnes
patent: 3635743 (1972-01-01), Smith
patent: 3649588 (1972-03-01), Kennedy-Shipton
patent: 3720532 (1973-03-01), Simpson

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