process for the production of an aqueous emulsion with close sizes distribution of dropletsuse of this emulsion for polymerdispersion and recovery of polymerpartikel from this dispersion

摘要

PCT No. PCT/NO97/00182 Sec. 371 Date Mar. 4, 1999 Sec. 102(e) Date Mar. 4, 1999 PCT Filed Jul. 16, 1997 PCT Pub. No. WO98/03555 PCT Pub. Date Jan. 29, 1998A process for preparing an aqueous emulsion with a narrow droplet size distribution of an oily material comprising one or more highly water insoluble substances, wherein the oily material is homogenized in a hydrophilic phase in which the oily material is more soluble than in water, but still so insoluble that an emulsion is formed by the homogenization, and the emulsion is subsequently diluted with a high proportion of water to form a stable emulsion of the oily material having the desired narrow size distribution. The stable emulsion may be mixed with an excess of a partly water soluble material which becomes absorbed by the droplets of the oily material. Said partly water soluble material may comprise a polymerizable monomer, and polymerization is subsequently effected to prepare a dispersion of polymer particles, and if desired, the polymer particles are recovered from said dispersion.