C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/478
C08F 6/04 (2006.01)
Patent
CA 1253291
Process for Removal of Low Molecular Weight Fractions From Vinyl Pyridine Polymers and Copolymers Abstract Disclosed is a process for separating high molecular weight polymers of alkenyl pyridine compounds having a pKa of about 2-10 from mixtures thereof with monomers and low molecular weight frac- tions comprising dispersing the mixture in a solution of an acid having a pKa of between about 10 and about 6 at a temperature of between about 50°C and about 70°C, to thereby dissolve the monomers and low molecular weight fractions while maintaining the high molecular weight polymers as a solid, and sub- sequently separating the solid high molecular weight polymer from the solution of monomers and low molecular weight fractions in aqueous acid.
463737
Dombroski John R.
Hawkins James M.
Eastman Kodak Company
Gowling Lafleur Henderson Llp
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