PROCESS FOR THE PREPARATION OF MONODISPERSE POLYMER PARTICLES

摘要

A process for the preparation of monodisperse polymer particles which are formed by contacting monomers with aqueous dispersions comprising monodisperse swellable seed polymers/oligomers, and initiating polymerization in the presence of a steric stabilizer. The resulting swollen seed particles are characterized by the particle mode diameter.

主权项

1. A process for the preparation of monodisperse polymer particles having diameters of 1 μm to 6 μm, the process comprising:
forming an aqueous dispersion comprising monodisperse swellable seed particles and an anionic surfactant; contacting the aqueous dispersion with a monomer selected from the group consisting of acrylic monomers, methacrylate monomers and vinyl monomers selected from the group consisting of styrene, divinylbenzene (DVB), ethyl vinyl benzene, vinyl pyridine, amino-styrene, methyl-styrene, dimethylstyrene, ethyl styrene, ethyl-methyl-styrene, p-chlorostyrene and 2,4-dichlorostyrene; allowing the monomer to diffuse into the seed particles to form an aqueous dispersion of swollen seed particles; and initiating polymerization of the monomer in the aqueous dispersion of swollen seed particles; wherein the aqueous dispersion of swollen seed particles further comprises a polyvinylpyrrolidone.