Internaly crosslinked polymer microparticles having...

Details Internaly crosslinked polymer microparticles having... Internaly crosslinked polymer microparticles having...

C - Chemistry, Metallurgy

08

F

402/397

C08F 246/00 (2006.01) C08F 2/24 (2006.01) C08F 220/34 (2006.01)

Patent

CA 1286832

ABSTRACT OF THE DISCLOSURE Polymer microparticles having a three-dimensional network structure and an average particle size of 0.01 to 1 micron are obtained by emulsion polymerization of ethylenic- ally unsaturated monomeric composition containing (a) at least one polyfunctional monomer having a plurality of poly- merizable sites, or (b) a combination of two ethylenically unsaturated monomers each bearing mutually reactive;functional groups in an aqueous medium in the presence of a compound or resin having a betaine group. The betaine compound or resin is incorporated into the polymer microparticles by physically adhering or covalently binding thereto to enhance the dispersing stability of the microparticles over a wide range of pH.

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