Process for the preparation of polymers from polymer slurries

Details Process for the preparation of polymers from polymer slurries Process for the preparation of polymers from polymer slurries

2007-12-04

2007-12-04

Boykin, Terressa (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

C210S665000, C422S186220, C422S198000

Reexamination Certificate

active

11056712

ABSTRACT:
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.

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“Polymer Extrusion” by Chris Rauwendal, Hanser Publishing (1986), pp. 154-163.

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