Process for preparing bead polymers

Details Process for preparing bead polymers Process for preparing bead polymers

C - Chemistry, Metallurgy

08

F

402/512, 402/521

C08F 2/10 (2006.01) C08F 20/34 (2006.01) C08F 20/36 (2006.01)

Patent

CA 1118942

ABSTRACT OF THE DISCLOSURE Disclosed is a process for preparing a water-soluble bead polymer by dispersing drops of an aqueous solution of water-soluble vinyl monomer in a dispersing medium in the presence of a dispersion stabilizer, and polymerizing the monomer. The monomer is selected from (A) a compound of the general formula I Image (I) wherein R1 is hydrogen or methyl, R2 and R3 may be the same or different and each is linear or branched alkyl of from 1 to 4 carbon atoms, R4 is hydrogen, linear or branched alkyl of from 1 to 8 carbon atoms, hydroxy alkyl of from 1 to 4 carbon atoms, or benzyl, Y is alkylene or hydroxyalkylene each of from 2 to 4 carbon atoms, and X is an anion, or (B) a mixture of the compound of the formula I and a water- soluble vinyl monomer copolymerizable with the compound (I), while the dispersion stabilizer is a cellulose ester or a cellulose ether insoluble in water but soluble in the dispersing medium.

294420

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