Emulsion living-type free radical polymerization, methods and products of same
US6518364B2 · kind B2 · utility
23Cited by
5References
24Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 25, 2001 |
| Grant date | Feb 11, 2003 |
| Priority date | — |
| Expiry date | Sep 25, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2438/03
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Heterogeneous (e.g., emulsion) polymerization systems include a control agent that has a nitrogen-nitrogen bond covalently bonded to a thiocarbonyl moiety for living-type free radical polymerization of a wide variety of monomers. These control agents provide superior properties for control of the polymerization and/or the properties of the polymers obtained and/or the monomers that may be polymerized. Multifunctional control agents provide the opportunity for a variety of structurally unique polymers, including block copolymers, stars and hyper-branched polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.