Dispersion preparation

Details Dispersion preparation Dispersion preparation

1978-10-02

1980-06-24

Michl, Paul R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 296PM, 260 342, C08A 3310

Patent

active

042094356

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 stabilized dispersion in a non-aqueous liquid of a first polymer insoluble in the non-aqueous liquid and in water; (ii) polymerizing monomer in the same non-aqueous liquid in the presence of the particles of the first polymer and of a steric stabilizer, 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 diffiult to make by known aqueous emulsion polymerization techniques.

REFERENCES:
patent: 3691123 (1972-09-01), Clarke
patent: 3935155 (1976-01-01), Osmond
patent: 3979349 (1976-09-01), Fink

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