Dispersion preparation

Details Dispersion preparation Dispersion preparation

C - Chemistry, Metallurgy

08

F

400/5023

C08F 2/12 (2006.01) C08F 2/14 (2006.01) C08F 291/00 (2006.01)

Patent

CA 1118128

ABSTRACT A method of preparing a stable dispersion in an aqueous medium of particles of polymer in which stabilisation of the particles against flocculation is effected by a steric mechanism. The method comprises (i) forming a sterically stabilised dispersion in a non-aqueous liquid of a first polymer insoluble both in the non-aqueous liquid and in water; (ii) polymerising monomer in the same non-aqueous liquid in the presence of the particles of the first polymer and of a steric stabiliser, so as to form a second polymer which is soluble in the chosen aqueous medium; (iii) transferring the resulting particles to the aqueous medium. There may be prepared in this way aqueous dispersions of polymers incorporating units of water-soluble monomers, which are difficult to make by known aqueous emulsion polymerisation techniques.

312996

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