Preparation of polymer particles
US7598316B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 4, 2002 |
| Grant date | Oct 6, 2009 |
| Priority date | — |
| Expiry date | Mar 12, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/254
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for the preparation of polymer magnetic particles, which comprises: providing a water phase containing magnetic components homogeneously dispersed therein, wherein the water phase is contacted with or further contains a polymerisable metal-containing or organic monomer which is soluble in the water phase, and polymerizing the monomer in the presence of the magnetic components so as to form polymer magnetic particles in which the magnetic components are substantially uniformly distributed; wherein at least a part of the polymerizing step is carried out in a water-in-oil emulsion in which the water phase containing the magnetic components homogenously dispersed therein is present as a discontinuous phase in a continuous oil phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.