Brian Stanley Hawkett,Thi Thuy Binh Pham,Christopher Henry Such
申请号：
US13202880
公开号：
US20120128743A1
申请日:
2010.02.24
申请国别(地区):
US
年份:
2012
代理人:
摘要：
The present invention relates to a method of forming polymer on the surface of polymer particles, the method comprising:(i) providing a dispersion comprising a continuous aqueous phase, a dispersed organic phase comprising one or more ethylenically unsaturated monomers, and a RAFT agent as a stabiliser for said organic phase(ii) polymerising the one or more ethylenically unsaturated monomers under the control of the RAFT agent to form an aqueous dispersion of seed polymer particles(iii) crosslinking the seed polymer particles(iv) swelling the crosslinked seed particles with one or more ethylenically unsaturated monomers to form an aqueous dispersion of monomer swollen crosslinked seed polymer particles(v) increasing the temperature of the monomer swollen crosslinked seed polymer particles to expel at least some of the monomer therein onto the surface of the particles andpolymerising at least the expelled monomer to form polymer on the surface of the particles.
