Controlled mini-emulsion free radical polymerization
US7317050B2 · kind B2 · utility
3Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2002 |
| Grant date | Jan 8, 2008 |
| Priority date | — |
| Expiry date | Oct 9, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2438/03
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention concerns a method for preparing polymers by free radical polymerisation comprising (i) preparing a mini-emulsion containing: at least an ethylenically unsaturated monomer, at least a control agent selected among xanthates, dithio-carbamates, thioether-thiones, the xanthates comprising phosphorus and optionally fluorine and dithiophosphoroesters, an aqueous solution, a surfactant, and a co-surfacant, and (ii) reacting said mini-emulsion, in the presence of a free radical source, at a sufficient temperature and/or for a sufficient time interval to form the polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.