Process for making and using foam control compositions

Details Process for making and using foam control compositions Process for making and using foam control compositions

2007-05-17

2011-11-08

Zimmer, Marc (Department: 1765)

Colloid systems and wetting agents; subcombinations thereof; pro

Compositions containing an agent for breaking ; processes of...

Continuous liquid phase colloid system and discontinuous gas...

C516S116000, C516S117000, C525S477000, C525S478000, C524S492000, C524S588000, C528S031000, C528S032000, C528S50200C

Reexamination Certificate

active

08053480

ABSTRACT:
A process for making a foam control composition comprising a cross-linked polyorganosiloxane in which is dispersed a filler, with hydrophobic surface, comprising step (A) mixing (i) a finely divided filler, (ii) a polyorganosiloxane having on at least two reactive substituents, for example on average two reactive substituents, and (iii) a polyorganosiloxane having at least three reactive substituents, capable of addition reaction via hydrosilylation; (B) hydrosilylation reaction of components (ii) and (iii) until the mixture at least partially gels, followed by applying shearing forces to this at least partially gelled mixture. Optionally step (A) comprises a diluent or solvent and after step (B) an emulsification step is carried out to make the foam control composition into an O/W emulsion. Also a process for controlling foam in an aqueous environment by using a foam control composition according to the invention, selected from inks, coatings, paints, detergents, black liquor of from those encountered during pulp and paper manufacture, waste water treatment, textile dyeing processes or the scrubbing of natural gas.

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Abstract for JP 2006-169343 A (Jun. 2006).
Machine-generated translation for JP 2006-169343 A (Jun. 2006).
English language abstract for EP0716870 extracted from espacenet.com database, dated Apr. 27, 2009.
English language abstract for EP1424117 extracted from espacenet.com database, dated Apr. 28, 2009.
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