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US 7,304,125 B2Granted
Process for the preparation of polymers from polymer slurries
AssigneeStratek Plastic Ltd.
InventorJean-Pierre Ibar
Life of this patent
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AssigneeStratek Plastic Ltd.
InventorJean-Pierre Ibar
Estimating the term…
A process for manufacturing a polymer having a molecular weight in excess of 5,000, and preferably in excess of 40,000, comprises, producing a polymerized reaction mass in which the polymer is dispersed, the reaction mass including solvent(s), unreacted monomer and other unwanted contaminants; feeding the reaction mass to a means for disentangling the polymer's molecules to produce a modified polymer in the reaction mass; feeding the modified polymer in the reaction mass to a polymer-recovering means; removing the unwanted volatiles and other byproducts; and, recovering a high molecular weight substantially pure modified polymer having substantially the same molecular weight as the polymer fed to the disentangling means and a viscosity at least 10% lower than that of the polymer fed to the disentangling means.
A process for purifying a high molecular weight (Mw) polymer in a reaction mass containing less than 20% by weight of contaminants, after the reaction mass is discharged from a polymerization reactor, the process comprising the steps of,
A process for purifying a high molecular weight (Mw) polymer in a reaction mass containing in excess of about 20% by weight of contaminants, after the reaction mass is discharged from a polymerization reactor, comprising the steps of:
A process for purifying a high molecular weight (Mw) polymer in a reaction mass containing in excess of about 20% by weight of contaminants, after the reaction mass is discharged from a polymerization reactor, comprising the steps of:
A process for purifying a polymer comprising the steps of:
Dependencies are inferred from the claim text.