Preparation of vinylpyrollidone polymers

Details Preparation of vinylpyrollidone polymers Preparation of vinylpyrollidone polymers

C - Chemistry, Metallurgy

08

F

402/2

C08F 26/10 (2006.01) C08F 2/38 (2006.01)

Patent

CA 1299315

ABSTRACT OF THE DISCLOSURE: A process is disclosed, for the preparation of a hydrazine-free N-vinyl-2-pyrrolidone polymer which dissolves in water and organic solvents to give a clear solution and contains not less than 50% by weight of N-vinyl-2-pyrro- lidone as copolymerized units. According to this process, from 0.1 to 3% by weight, based on monomer, of di-tert-butyl peroxide, if necessary diluted up to 100 times in solution or emulsion, are added to a 10 to 80% strength by weight aqueous monomer solution, and the stirred mixture is kept for from 1 to 15 hours at from 100 to 160°C, the desired molecular weight being set in the Fikentscher K value range of from 10 to 100 by adding from 0 to 100% by weight, based on monomer, of a regulator.

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