Process for producing spherical and porous vinyl resin...

Details Process for producing spherical and porous vinyl resin... Process for producing spherical and porous vinyl resin...

C - Chemistry, Metallurgy

08

F

402/395, 402/546

C08F 2/20 (2006.01) C08F 2/30 (2006.01) C08F 14/06 (2006.01)

Patent

CA 1218795

Abstract of the Disclosure Process for making porous, substantially spher- ical particles of vinyl polymers or resins by the use of the suspension polymerization technique. In the polymerization there is employed a water-insoluble dispersant comprised of a substantially unneutralized crosslinked interpolymer of one or more carboxylic acid monomers with a polyunsaturated compound having a plurality of terminally unsaturated polymerizable groups and optionally a water-soluble surfactant with a poly- ether type hydrophilic segment using rapid stirring or high agitation while employing a monomer-soluble free radical yielding polymerization catalyst. When using the new process, the polymer buildup in the re- actor is substantially reduced.

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