Processes based on atom (or group) transfer radical polymerization and novel (co) polymers having useful structures and properties
Patent 5807937 Issued on September 15, 1998. Estimated Expiration Date: 
November 15, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 15, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesUniform molecular weight polymers Free radical copper(II)-enolate polymerization initiators Living carbocationic polymerization process Patent #: 5451647 Inventors
AssigneeApplicationNo. 559309 filed on 11/15/1995US Classes:526/135, With non-metal N, P, O, S, Se, Te, or halogen material other than nitrogen gas526/145, Non-metal phosphorus-containing material526/146, Non-metal sulfur-containing material526/147Non-metal nitrogen-containing materialExaminersPrimary: Schofer, Joseph L.Assistant: Cheng, Wu C. Attorney, Agent or FirmInternational ClassesC08F 004/06C08F 004/40 AbstractImproved processes have been developed for atom (or group) transfer radical polymerization (ATRP). In one improvement, the ATRP process involves polymerizing in the presence of a (partially) free radical-deactivating amount of the corresponding reduced or oxidized transition metal compound. In a further improvement, the ATRP process involves polymerizing in a homogeneous system or in the presence of a solubilized initiating/catalytic system. The present invention also concerns end-functional, site-specific functional and telechelic homopolymers and copolymers; block, random, graft, alternating and tapered (or "gradient") copolymers which may have certain properties or a certain novel structure; star, comb and "hyperbranched" polymers and copolymers; multi-functional hyperbranched, end-functional polymers; cross-linked polymers and gels; water-soluble polymers and hydrogels (e.g., a copolymer prepared by radical copolymerization of a water-soluble monomer and a divinyl monomer); and an ATRP process using water as a medium. | |
