Preparation of polymer dispersions.

摘要

A polymer dispersion is prepared by dispersing polymer particles in a solvent. The polymer particles comprise one or more core particles (preferably of particle size below 0.5 micron) of a first polymer, which is insoluble in the solvent, encapsulated within a second polymer which is soluble in the solvent. The polymer particles are generally prepared by polymerising the monomers forming the second polymer in the presence of an emulsion of the first polymer. The first polymer is preferably prepared by an emulsion polymerisation. The dispersions are useful in fibres, films and coatings. In one embodiment the solvent is a polymerisable monomer such as methyl methacrylate forming a polymerisable moulding composition useful for denture plates, for example.