Dispersed phase polymerization of halogenated vinyl monomers in the presence of live reactive stabilizers
US9255163B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2013 |
| Grant date | Feb 9, 2016 |
| Priority date | — |
| Expiry date | Jan 30, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2438/03
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention concerns a method for the dispersed phase polymerization of halogenated vinyl compounds, having the formula RbRcC═CX1X2, where: X1═F or CI, X2═H, F or CI, each of Rb and Rc, separately represents: —H, CI, F; or—an alkyl group, preferably chlorinated and/or fluorinated, and more advantageously perchlorinated or perfluorinated, comprising a step (E1) wherein said monomers are introduced into an aqueous phase together with—at least one source of free radicals; and—at least one reactive stabilizer comprising a polymer chain and a thiocarbonylthio-S group (C═S)—, said polymer chain comprising non-(N vinyl lactam)monomer units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.