Water-based defoamer compositions

Details Water-based defoamer compositions Water-based defoamer compositions

1975-06-04

1977-06-28

Sebastian, Leland A.

Compositions

Preservative agents

Anti-corrosion

252321, B01D 1904

Patent

active

040324737

ABSTRACT:
Water-based defoamer compositions in the form of aqueous emulsions containing, as the disperse phase, about 25-55% of a water insoluble liquid hydrocarbon, about 25-55% of a normally solid fatty acid diamide, about 1.0-7.5% of hydrophobic silica particles, and about 8-16% of a non-ionic emulsifier having an HLB of about 8-12, the percentages being based on the weight of the disperse phase. Optionally, up to about 10% of the diamide may be replaced with a silicone oil. The compositions are useful for controlling foam in pulp and paper mill operations.

REFERENCES:
patent: 3076768 (1963-02-01), Boylan
patent: 3723342 (1973-03-01), Shane et al.
patent: 3923683 (1976-11-01), Michalski et al.

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