Aqueous defoamer dispersions of ethylenebis (stearamide)

B - Operations – Transporting – 01 – D

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B01D 19/04 (2006.01) D21H 17/07 (2006.01) D21H 21/12 (2006.01)

Patent

CA 2150556

Aqueous substantially hydrocarbon oil-free emulsions prepared from aliphatic diamides, such as ethylenebis (stearamide)(EBS) and related compounds, are found to be effective defoamers for use in various paper-making operations. These compositions avoid many of the deleterious effects of conventional oil-based EBS defoamers, thereby allowing their use on paper machines.

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