Antifoam composition

Details Antifoam composition Antifoam composition

1985-01-24

1987-09-01

Morris, Theodore

Compositions: coating or plastic

Coating or plastic compositions

Silicon containing other than solely as silicon dioxide or...

10628712, 10628714, 252358, C09K 300, B01D 1700

Patent

active

046907130

ABSTRACT:
The antifoam composition provided by the invention comprises (a) 100 parts by weight of a hydrocarbon oil, e.g. spindle oil, or a silicone fluid, e.g. polydimethylsiloxane fluid, having a viscosity of 20 to 1,000,000 centistokes at 25.degree. C., (b) 0.1 to 40 parts by weight of an organosilane compound having 1 to 3 hydroxy groups or hydrolyzable groups, e.g. alkoxy, acyloxy and alkenyloxy groups, (c) 1 to 40 parts by weight of a finely divided silica powder and, optionally, (d) up to 5 parts by weight of a catalyst. The antifoam composition can exhibit excellent and durable defoaming activity even under vigorous agitation or in an alkaline condition of the foaming liquid.

REFERENCES:
patent: 2702793 (1955-02-01), Smith
patent: 4076648 (1978-02-01), Rosen
patent: 4101443 (1978-07-01), Rosen
patent: 4145308 (1979-03-01), Simoneau et al.
patent: 4377493 (1983-03-01), Boycan
patent: 4443359 (1984-04-01), Shimizu et al.
patent: 4486336 (1984-12-01), Pape et al.
patent: 4514319 (1985-04-01), Kulkarni

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