C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
400/6401
C08F 2/00 (2006.01) C08F 257/02 (2006.01) C08F 291/00 (2006.01)
Patent
CA 1277064
ABSTRACT OF THE DISCLOSURE Seed processes for preparing crosslinked ion exchange copolymer particles involve imbibing a seed particle with a first monomer mixture containing a minor amount of polyvinyl monomer and polymerizing the imbibed seed. A second stage monomer mixture contains a major amount of polyvinyl monomer. The second stage monomer mixture can be added either batchwise or contin- uously and polymerized when imbibed into the swollen seed particle. The particles so prepared exhibit good osmotic shock resistance and mechanical properties.
479434
Smart & Biggar
The Dow Chemical Company
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