Process for polymerization of 2-pyrrolidone
AssigneeChevron Research Company
InventorRobert Bacskai
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Abstract
A process for polymerizing 2-pyrrolidone utilizing an agitated reaction mixture containing an inert nonsolvent and an insoluble salt in order to produce a particulate, or easily comminuted, solid product.
Claims9
The process for polymerizing 2-pyrrolidone comprising agitating 2-pyrrolidone, alkaline polymerization catalyst, polymerization initiator, an inert nonsolvent in weight ratio to 2-pyrrolidone of about 0.5-20:1, and an insoluble salt, which is alkali metal halide in weight ratio to 2-pyrrolidone of about 1-10:1 at a temperature of from 25.degree. to about 70.degree. C for 4 to about 100 hours to form a particulate poly-2-pyrrolidone product.
The process for polymerizing 2-pyrrolidone by agitating a reaction mixture containing 2-pyrrolidone, alkaline polymerization catalyst, polymerization initiator, and inert nonsolvent in weight ratio to 2-pyrrolidone of about 0.5 - 20:1, and an insoluble salt, which is alkali metal halide, in such weight ratio to 2-pyrrolidone as to saturate the reaction mixture leaving the bulk of its weight present undissolved in the reaction mixture, at a temperature of from 25.degree. to about 70.degree. C for 4 to about 100 hours to form a particulate poly-2-pyrrolidone product.
Dependencies are inferred from the claim text.