Polymeric defoamer compositions

Details Polymeric defoamer compositions Polymeric defoamer compositions

C - Chemistry, Metallurgy

08

L

C08L 33/10 (2006.01) B01D 19/04 (2006.01) D21H 21/12 (2006.01)

Patent

CA 2048907

Polymeric defoamer compositions are prepared from hydroxyalkylacrylate or methacrylate containing polymers which are then solubilized in an organic carrier system. The polymers are effective defoamers and drainage aids for brown stock washers, screen rooms, and in other paper-making operations. The compositions, which may be petroleum oil-free, avoid many of the deleterious effects of conventional petroleum oil-based EBS defoamers.

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