Compounds useful for control agents for living-type free radical polymerization
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United States of America Patent
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Feb 11, 2003
Grant Date -
May 16, 2002
app pub date -
Sep 25, 2001
filing date -
Sep 28, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Control agents that have a nitrogen-nitrogen bond covalently bonded to a thiocarbonyl moiety are provided 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. In some embodiments, a bulky group is pendant off the activated thiocarbonyl portion of the control agents. Multifunctional control agents provide the opportunity for a variety of structurally unique polymers, including block copolymers, stars and hyper-branched polymers.
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