Emulsion living-type free radical polymerization, methods and products of same
First Claim
1. A method of free radical polymerization comprising (1) forming a mixture of one or more monomers, water, optionally surfactant, at least one free radical source and a control agent and (2) subjecting said mixture to polymerization conditions, wherein said control agent is characterized by the general formula:
3 Assignments
0 Petitions
Accused Products
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.
-
Citations
24 Claims
- 1. A method of free radical polymerization comprising (1) forming a mixture of one or more monomers, water, optionally surfactant, at least one free radical source and a control agent and (2) subjecting said mixture to polymerization conditions, wherein said control agent is characterized by the general formula:
-
13. A method of method of heterogeneous free radical polymerization comprising (1) forming a heterogeneous mixture of one or more monomers, at least one free radical source, water, optionally surfactant and a multi-functional control agent and (2) subjecting said heterogeneous mixture to polymerization conditions, wherein said multi-functional control agent is selected from any of the following formulas:
-
24. A compound characterized by the general formula:
Specification