Polymerization processes and products
US6277932A · kind A · utility
5Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1999 |
| Grant date | Aug 21, 2001 |
| Priority date | — |
| Expiry date | Aug 12, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/1942
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Beads are made from water-soluble monomer or monomer blend by reverse phase bead polymerization by extruding aqueous monomer beads into or onto the top of an upflowing column of non-aqueous liquid and the beads polymerise as they float downwardly through the column during a period of at least 1/2 minute. The resultant beads can have a very narrow particle size distribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.