Antifoaming and defoaming compositions

Details Antifoaming and defoaming compositions Antifoaming and defoaming compositions

B - Operations, Transporting

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134/56

B01F 17/12 (2006.01) B01D 19/00 (2006.01) B01D 19/04 (2006.01) D21H 21/12 (2006.01)

Patent

CA 2028708

ABSTRACT ANTIFOAMING AND DEFOAMING COMPOSITIONS An aqueous defoaming/antifoaming composition which comprises: (a) from 5 to 75 parts by weights or a water- soluble non-ionic polyoxyalkylene condensate derived from an active hydrogen-containing precursor or an ester thereof and from at least two alkylene oxides, (b) a water-soluble aromatic sulphonate salt of the formula: Image where a is 1 or 2, R is a C1-4 alkyl group which may be the same or different when a is 2 and M is a cation, such that the weight ratio of (b) to (a) is at least 1:15, and (c) from 20 to 90 parts by weight of water.

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