Antimicrobial antifoam compositions and methods

Details Antimicrobial antifoam compositions and methods Antimicrobial antifoam compositions and methods

B - Operations, Transporting

01

D

134/56, 117/47.8

B01D 19/04 (2006.01) A01N 55/00 (2006.01) C08K 9/06 (2006.01) C09C 1/30 (2006.01)

Patent

CA 1331333

ANTIMICROBIAL ANTIFOAM COMPOSITIONS AND METHODS ABSTRACT A defoamer composition including a primary antifoam agent which includes a particulate-type material having a high surface area such as silica, a secondary antifoam agent for acting synergistically with the primary antifoam agent such as polydimethylsiloxane, a water carrier and a quaternary ammonium salt silane compound which functions as an antimicrobial agent, fixed and adhered to the surface of the particulate material, in order that the defoamer composition be resistant to biological degradation due to the presence in the system of microorganisms. Methods of defoaming cationic, anionic and nonionic surfactant produced foams are disclosed, as is a method of rendering silica hydrophobic.

602720

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