Process for degassing and/or defoaming organic systems

Details Process for degassing and/or defoaming organic systems Process for degassing and/or defoaming organic systems

B - Operations, Transporting

01

D

B01D 19/04 (2006.01) C08G 77/38 (2006.01) C08G 77/46 (2006.01)

Patent

CA 2091584

A process for defoaming and/or degassing organic systems by addition of an organopolysiloxane-containing anti-foaming agent to the organic system is characterized by the fact that the organopolysiloxane used is one composed of siloxane units hav- ing the general formulae (I) and (II), in which R is a univalent hydrocarbon residue with 1 to 18 carbon atoms per residue; A is a residue having the general formula (a), in which R1 is a residue having ihe formula -CR3H-, where R3 stands for a hydrogen atom or a univalent organic residue; R2 is a residue having the formulae -CR4H-CH2- or -CH2CH2CH2- where R4 stands for a hydrogen atom or a univalent organic residue; v and w represent each O or an integer, the sum of v + w being in aver- age 0 to 16; x and y represent each 0 or 1, the sum x + y being 1 or 2; a equals 1,2 or 3; b equals 0, 1 or 2 and c equals 1 or 2, the sum b + c not exceeding 3.

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