Magnetizable composite particles based on crosslinked organopolysiloxane, process for preparation thereof and their application in biology
US5108636A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1990 |
| Grant date | Apr 28, 1992 |
| Priority date | — |
| Expiry date | Oct 31, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2995
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Magnetizable composite particles, optionally in aqueous dispersion, consisting of a matrix based on a crosslinked organopolysiloxane, optionally bearing nonvinyl reactive and/or ionic units and magnetizable components less than 300 angstroms in diameter encapsulated in the matrix. The magnetizable composite particles are prepared by homogenizing a solution of the organopolysiloxane, an organohydrogenopolysiloxane optionally bearing ionic and/or reactive units, and a magnetic fluid, in the presence of water and a surfactant, performing a hydrosilylation in an aqueous emulsion, removing the organic solvents and the organic carrier liquid, and at least partially removing the water. The magnetizable composite particles are useful in biological applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.