Magnetizable composite microspheres of hydrophobic crosslinked polymer, process for preparing them and their application in biology
US5356713A · kind A · utility
75Cited by
12References
9Claims
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Key dates
| Filing date | Jun 1, 1993 |
| Grant date | Oct 18, 1994 |
| Priority date | — |
| Expiry date | Jun 1, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Magnetizable composite microspheres approximately from 0.05 to 10 .mu.m in diameter, comprising a core of magnetizable particles and a shell of a hydrophobic crosslinked copolymer formed from a vinylaromatic monomer and a crosslinking emulsifying polymer. The microspheres are obtained by the pre-emulsification in water of a magnetic fluid composed of magnetizable particles dispersed in a vinylaromatic monomer and in a crosslinking emulsifying polymer, polymerization, separation of the magnetizable microspheres and optional redispersion in water. The microspheres are useful in biological applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.