Ultrafiltration processes for the recovery of polymeric latices from whitewater

U.S. Patent Number: 5342863

Abstract: Polymer is recovered by ultrafiltration from a whitewater waste stream generated during the production of a polymer latex. The whitewater stream is circulated through an ultrafiltration system in laminar flow, under conditions of shear insufficient to destabilize the whitewater emulsion, and the recovered polymer is in the form of an emulsion which may be blended at significant levels into the original polymer latex without degrading its performance properties.

Inventors: Buckley; Randall G. (Mt. Laurel, NJ), Eastburn; George L. (Pineville, PA), Schmitz; Marion C. (Richboro, PA), Breslau; Barry R. (Acton, MA), Tansey; Shawn P. (Westford, MA)

Assignee: Rohm and Haas Company (

Application Number: 07/914,288

Issued: 1994-08-30

Expired: 2006-08-30

Classes: 523/310 ; 210/130; 210/137; 210/195.2; 210/257.2; 210/637; 210/97; 524/167

Field of search: 523/310 210/636,650,651,652,97,130,137,195.2,257.2,637 524/167

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