Anti-foam formulation containing an organopolysiloxane

Details Anti-foam formulation containing an organopolysiloxane Anti-foam formulation containing an organopolysiloxane

B - Operations, Transporting

01

D

134/56

B01D 19/04 (2006.01)

Patent

CA 1157735

Anti-foam formulation containing an organopolysiloxane ABSTRACT An anti-foam composition comprising a) a dispersion of a silicon dioxide filler in an organo- polysiloxane, b) an emulsifier or dispersant, and c) at least one water soluble compound selected from the group consisting of i) a divalent aliphatic alcohol containing 4 to 10 carbon atoms, ii) a trivalent aliphatic alcohol containing 2 to 10 carbon atoms, and iii) R1O(-CH2-CH2-O)nR2, Image , R1O(-CH2-CH2-CH2-O)nR2 and Image in which R1 and R2 each independently is hydrogen, C1-8- alkyl or C1-8-alkyl-CO-, and n,m,p and r are so chosen that the molecular weight of (c) does not exceed 499. Advantageously, based upon (a) plus (b) plus (c) the compo- sition by weight comprises about 25 to 35% (a), about 8 to 12% (b) and about 53 to 67% (c), the composition additionally containing water in up to about 45% by weight of the entire composition. The composition is more readily water-disper- sible and of better anti-foaming action than heretofore. Le A 20 258

375128

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