Synthesis of vinyl polymers by controlled radical polymerization
US7351781B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2005 |
| Grant date | Apr 1, 2008 |
| Priority date | — |
| Expiry date | Feb 4, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F293/005
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A controlled free radical polymerization process, which includes the steps of: adding a monofunctional iniferter compound to an oxygen-free solvent; heating the solution to a temperature sufficient to allow the iniferter compound to form two carbon centered radical residues; adding a first monomer composition comprising one or more monomers to the solution containing the radical containing residues; polymerizing the first monomer composition to form a quasi-living polymer; and optionally polymerizing a second monomer composition comprising one or more monomers, which are different than the first monomer composition. The resulting non-random copolymer having the general formula:φ-[-Ap-Bs-]t-φwhere A and B are different compositions of ethylenically unsaturated monomers; p is an integer from 1 to 1,000; s is an integer from 0 to 1,000; t is an integer from 1 to 100; and φ is a residue from the iniferter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.