Defoaming composition

Details Defoaming composition Defoaming composition

1990-01-26

1992-04-21

Stoll, Robert L.

Compositions

Preservative agents

Anti-corrosion

252321, B01D 1904

Patent

active

051065355

ABSTRACT:
The silicone-based defoaming composition of the invention comprises (a) a polyoxyalkylene group-substituted organopolysiloxane, (b) a dimethyl silicone fluid and (c) a finely divided silica powder. Different from conventional similar compositions, the polyoxyalkylene groups in the component (a) are bonded to the silicon atoms only in the monofunctional siloxy groups and the component (a) necessarily has trifunctional siloxane units. By virtue of this unique formulation, the inventive defoaming composition added to a foaming liquid is very stable against flocculation even at a high temperature and even in the presence of an inorganic salt in a high concentration in the foaming liquid, e.g., dyeing bath.

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patent: 4804737 (1989-02-01), Berger et al.
patent: 4961877 (1990-10-01), Shimizu et al.
Derwent Abstract, 73-19285u/14.
Japanese Abstracts, 55-161850, vol. 5, No. 35, (Mar. 5, 1981).

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