Method for the preparation of a silicone defoamer composition

Details Method for the preparation of a silicone defoamer composition Method for the preparation of a silicone defoamer composition

B - Operations, Transporting

01

F

134/56

B01F 17/54 (2006.01) B01D 19/04 (2006.01)

Patent

CA 1297757

METHOD FOR THE PREPARATION OF A SILICONE DEFOAMER COMPOSITION ABSTRACT OF THE DISCLOSURE A defoamer composition is obtained when a mixture of certain siloxane-containing components, a finely divided filler, a reaction catalyst and at least one compound having in each molecule at least 1 group expressed by ?COR5, -COOR6 or -(OR7)n- is heated. R5 and R6 are the hydrogen atom or saturated or unsaturated monovalent hydrocarbon groups, R7 is a divalent hydro- carbon group having two to six carbon atoms, and the average value of n is ?1. The siloxane-containing components comprise resinous polyorganosiloxanes and typically, polydiorganosiloxanes. The heated mixture is useful for defoaming anionic systems.

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