Process for the production of polymer microparticles
US8288491B2 · kind B2 · utility
4Cited by
6References
9Claims
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Key dates
| Filing date | Jan 22, 2009 |
| Grant date | Oct 16, 2012 |
| Priority date | — |
| Expiry date | Jan 22, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F4/40
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing high-quality polymer microparticles having uniform particle size of the order of several micrometers to tens of micrometers by inverse suspension polymerization at high productivity while keeping excellent dispersion stability without causing aggregation among particles. The inverse suspension polymerization involves a vinyl monomer and is performed in at least two steps. A water-soluble oxidizing agent and a water-soluble reducing agent are used as a polymerization initiator, and the water-soluble reducing agent is fed after the water-soluble oxidizing agent is fed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.