Patent ID: 9309368
Filing Date: 2016-04-12
CPC Classification: C08F,C08J

Claim Text:
1. A process for the preparation of functionalized monodisperse polymer particles comprising: 1) preparing monodisperse swellable seed particles by emulsion polymerization, wherein an anionic surfactant is employed as emulsifier under substantially oxygen-free conditions; wherein said seed particles are non-oligomeric: (a1) contacting said non-oligomeric seed particles with an aqueous dispersion comprising an organic compound with a molecular weight below 5000 Dalton and a water solubility at 25° C. of less than 10 (b1) allowing said organic compound to diffuse into said non-oligomeric seed particles; and (c1) contacting the aqueous dispersion of non-oligomeric seed particles with a monomer which is at least ten times more water soluble than said organic compound; or wherein said seed particles are oligomeric: (a2) contacting said oligomeric seed particles with an aqueous dispersion comprising the anionic surfactant; and (b2) contacting the aqueous dispersion of oligomeric seed particles with a monomer; 2) if required adding a water-soluble steric stabilizer, if required adding a porogen, and if required adding a polymerization initiator; and 3) initiating polymerization of said monomer in an aqueous dispersion containing a steric stabilizer in continuous phase; and 4) reacting with one or more bifunctional reagent(s) which react with one or more functional groups present in said monomer to form one or more desired functional groups on the surface of the monodisperse polymer particles, thereby forming functionalized monodisperse particles having a desired functional group.