Live poly(n-vinyl lactam) reactive stabilizers for dispersed phase polymerization
US9487598B2 · kind B2 · utility
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4References
12Claims
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Key dates
| Filing date | Jan 30, 2013 |
| Grant date | Nov 8, 2016 |
| Priority date | — |
| Expiry date | Jan 30, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2438/03
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention concerns a method for preparing a polymer comprising a step (EI) for dispersed phase polymerization in the presence of a reactive stabiliser, wherein the following are brought into contact in an aqueous phase:—at least one ethylenically unsaturated monomer; —at least one source of free radicals; and—a reactive stabiliser comprising a polymer chain including monomer units (N-vinyl lactam) and a thiocarbonylthio-S group (C═S)—.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.