Process of preparation of particles of polymers comprising implanted in its surface, molecular anfifilicas,Therefore agrupos ionogenos or reactive to particles or particles of aqueous dispersoes

摘要

The process comprises the following stages:… 1) diffusion, into an aqueous "seed" dispersion of polymer particles, of an organosoluble polymerisation initiator, at a temperature lower than that of the initiator decomposition… 2) swelling the particles by introduction of the monomer to be polymerised and of an amphiphilic compound containing an oligomeric hydrophilic block ending in an ion-forming or reactive group, at a temperature lower than that of the initiator decomposition… 3) polymerisation of the monomer… 4) removal of the unimplanted amphiphilic constituent… 5) optionally separation of the particles. …??The particles or the dispersions of particles thus obtained may be employed in biology.