Method for increasing the bulk weight of silicon dioxide

Details Method for increasing the bulk weight of silicon dioxide Method for increasing the bulk weight of silicon dioxide

1979-10-11

1982-04-27

Garris, Bradley

Chemistry: physical processes

Physical processes

55 97, 141 12, B01D 2920, B01D 3700, B01D 4626, B01J 300

Patent

active

043268528

ABSTRACT:
A method for increasing the bulk weight of silicon dioxide with a surface of at least 50m.sup.2 /g by means of sub-atmospheric pressure applied at a filter face, wherein the silicon dioxide is moved by means of a conveyor screw, whose longitudinal axis is arranged parallel with respect to the filter face and which preferably has a decreasing thread pitch in feeding direction. Furthermore, the invention relates to the use of the treated silicon dioxide as a filler material for polymeric masses, especially diorganopolysiloxane, which is storeable in the absence of water and when admixed with water at room temperature results in a hardened elastomer mass.

REFERENCES:
patent: 2806771 (1957-09-01), Cuthbertson et al.
patent: 2879809 (1959-03-01), Vogt
patent: 2981298 (1961-04-01), Vogt
patent: 3172726 (1965-03-01), Burke, Jr. et al.
patent: 3377945 (1968-04-01), Davis
patent: 3441387 (1969-04-01), Dye
patent: 4126423 (1978-11-01), Kongsgaarden
patent: 4126424 (1978-11-01), Kongsgaarden
patent: 4162148 (1979-07-01), Furstenberg
Kreuter; "Seifen-O/e-Fette-Wachse"; vol. 100 Nr.4/1974; pp. 101-103.

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