Nonsolvent preconcentration of polymeric cycloolefins

Details Nonsolvent preconcentration of polymeric cycloolefins Nonsolvent preconcentration of polymeric cycloolefins

C - Chemistry, Metallurgy

08

F

400/9407

C08F 6/10 (2006.01) C08F 6/06 (2006.01) C08F 32/00 (2006.01) C08G 61/08 (2006.01)

Patent

CA 1202134

Abstract of the Disclosure Process for preconcentrating polymer cement normally containing about 15% solids comprising mixing therewith an amount of a hydrocarbon nonsolvent liquid sufficient to form a two-phase system but insufficient to precipitate the polymer, and separating the two phases; the polymer cement is a honey-like solution of a polymer prepared by ring opening polymerization of at least one monomer containing the norbornene group in a nonpolar hydrocarbon solvent; the upper phase being a thin hydrocarbon liquid comprising nonsolvent, a substantial portion of the nonpolar solvent in the polymer cement, and impurities, and the lower phase being a preconcentrated polymer cement containing at least 20% solids.

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