Silica or silicic acid particles whose surface located hydroxyl

Details Silica or silicic acid particles whose surface located hydroxyl Silica or silicic acid particles whose surface located hydroxyl

1987-04-24

1989-07-04

Lovering, Richard D.

Stock material or miscellaneous articles

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

Particulate matter

106481, 106482, 106490, 2523152, 252321, 252325, 252358, 427220, 428446, 428447, B01J 1300, B32B 904

Patent

active

048449806

ABSTRACT:
Silicic acid or silica particles having initially surface-located hydroxyl groups are modified by replacing at least partially the hydroxyl groups by an organic group to impart the particles with emulsion-breaking and foam-destroying properties. Processes for preparing the modified particles are also disclosed.

REFERENCES:
patent: 3250727 (1966-05-01), Noll et al.
patent: 3408306 (1968-10-01), Boylan
patent: 3810843 (1974-05-01), Slusarczuk et al.
patent: 4042528 (1977-08-01), Abe
patent: 4062693 (1977-12-01), Berger
patent: 4105465 (1978-08-01), Berger
patent: 4477371 (1984-10-01), Huber et al.

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