Polymeric defoamer compositions

Details Polymeric defoamer compositions Polymeric defoamer compositions

1990-08-27

1992-10-06

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

252314, 252358, 1621687, B01D 1700, B01J 1300

Patent

active

051529254

ABSTRACT:
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.

REFERENCES:
patent: 3793223 (1974-02-01), Lichtman et al.
patent: 3951853 (1976-04-01), Suwala
patent: 4021365 (1977-05-01), Sinka et al.
patent: 4107073 (1978-08-01), Maciaszek
patent: 4225456 (1980-09-01), Schmidt et al.
patent: 4559162 (1985-12-01), Abel et al.
patent: 4664844 (1987-05-01), Bergold
patent: 4734205 (1988-03-01), Jacques et al.
patent: 4968449 (1990-11-01), Stephenson

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