Polymeric beads and methods of making polymeric beads
US8513322B2 · kind B2 · utility
14Cited by
73References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2007 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Jun 7, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2/34
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polymeric beads and methods of making the polymeric beads are described. The polymeric beads are crosslinked hydrogels or dried hydrogels. The polymeric beads are formed from droplets of a precursor composition that are exposed to radiation. The droplets are totally surrounded by a gas phase. The precursor composition contains a polar solvent and a polymerizable material miscible in the polar solvent. The polymerizable material has an average number of ethylenically unsaturated groups per monomer molecule equal to at least 1.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.