Preparation of water-soluble polymer powders and their use

Details Preparation of water-soluble polymer powders and their use Preparation of water-soluble polymer powders and their use

C - Chemistry, Metallurgy

08

F

402/650

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

Patent

CA 1247796

Abstract of the Disclosure: Water-soluble polymer powders are prepared by polymerizing water-soluble ethylenically unsaturated monomers in a powder bed in the presence of polymerization initiators and water while maintaining the powder state, removing the heat of polymerization by dis- tilling off water and circulating the reaction mixture, by a process in which water-insoluble organic peroxides which are liquid at 20°C are used alone or as a mixture with up to 50% by weight, based on the initiator mixture, of water-soluble, organic azo initiators and/or water- insoluble solid peroxy-containing compounds, as polymerization initiators.

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