Precipitation polymerization of copolymers of a vinyl lactam...

Details Precipitation polymerization of copolymers of a vinyl lactam... Precipitation polymerization of copolymers of a vinyl lactam...

C - Chemistry, Metallurgy

08

F

C08F 2/14 (2006.01) C08F 26/10 (2006.01) C08F 226/10 (2006.01)

Patent

CA 2082624

2082624 9118929 PCTABS00008 What is described herein is an improved precipitation polymerization process and copolymer products produced thereby. The process herein is carried out by charging a reactor with a solvent in which the copolymer product is substantially insoluble over the entire compositional range of the copolymer, preferably heptane or cyclohexane, and a polymerization initiator, heating to 50· to 150 ·C, agitating, and then simultaneously feeding selected amounts of a vinyl lactam and a polymerizable carboxylic acid into said reactor below the surface of the solvent while continuing to agitate the mixture to precipitate the copolymer from solution as a fine, white powder, and recovering the copolymer of defined composition.

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