S-(α, α′-disubstituted-α′...

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

Reexamination Certificate

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C588S253000, C562S426000, C562S581000

Reexamination Certificate



Dithiocarbonate derivatives are disclosed, along with a process for preparing the same. The dithiocarbonate compounds can be utilized as initators, chain transfer agents and/or terminators in controlled free radical polymerizations. The dithiocarbonates can be used to produce polymers having narrow molecular weight distribution. Advantageously, the compounds of the present invention can also introduce functional groups into the resulting polymers. The dithiocarbonate compounds have low odor and are substantially colorless.

patent: 3285945 (1966-11-01), Wember
patent: 3285949 (1966-11-01), Siebert
patent: 3770698 (1973-11-01), Riew
patent: 3928491 (1975-12-01), Waters
patent: 3992432 (1976-11-01), Napier et al.
patent: 4769419 (1988-09-01), Dawdy
patent: 5055515 (1991-10-01), Backderf
patent: 5140068 (1992-08-01), Siebert et al.
patent: 5157077 (1992-10-01), Siebert et al.
patent: 5198510 (1993-03-01), Siebert et al.
patent: 5258445 (1993-11-01), Sperk, Jr. et al.
patent: 5280068 (1994-01-01), Siebert et al.
patent: 5312956 (1994-05-01), Bertsch
patent: 5385963 (1995-01-01), McBain et al.
patent: 6153705 (2000-11-01), Corpart et al.
patent: 6380335 (2002-04-01), Charmot et al.
patent: 6395850 (2002-05-01), Charmot et al.
patent: 1223524 (1971-02-01), None
patent: 98/01478 (1998-01-01), None
patent: 99/05099 (1999-02-01), None
patent: 99/31144 (1999-06-01), None
patent: 99/35177 (1999-07-01), None
World Polymer Congress, 37thInternational Symposium on Macromolecules, Jul. 12-17, 1998, Gold Coast, Australia.
“Living Free-Radical Polymerization by Reversible Addition-Fragmentation Chain Transfer: The RAFT Process”, John Chiefari, et al., CSIROMolecular Science, Bag 10, Clayton South. Clayton, Victoria 3169, Australia, Received Mar. 27, 1998, Revised Manuscript Received Jun. 10, 1998.
“The Synthesis of Organic Trethiocarbonates1”, H.C. Godt, Jr., and R.E. Wann,Journal of Organic Chemistry, 26, 4047 (1961).
“Phase-Transfer Synthesis of Symmetrical and Unsymmetrical Dialkyl Trithiocarbonates”, Iacopo Degani, et al, Synthesis, p. 894 (1986).
“A New Form of Controlled Growth Free Radical Polymerization”, Julia Kristina, et al., CSIRO, Division of Chemicals and Polymers,Macromol, Symp. III, 13-23 (1996).
“One Pot Phase Transfer Synthesis of Trithiocarbonates from Carbon Disulphide and Alkyl Halides”, Albert W.M. Lee, et al,Synthetic Comm. 18(13), 1531 (1988).
“A Novel One-step Synthesis of Symmetrical Dialkyl Trithiocarbonates”, Man-kit Leung, et al,Journal of Chemical Research(S), 1995, 478-479.
“Direct Synthesis of Double Hydrophilic Statistical di- and Triblock Copolymers Comprised of Acrylamide and Acrylic Acid Units via the MADIX Process”, Daniel Taton, et al, Macromol, Rapid Commun, 22, No. 18, 1497-1503 (2001).
“Dithiocarbamates as universal reversible addition-fragmentation chain transfer agents”, M. Destarac, et al, Macromol. Rapid Commun., 21, No. 15, 1035-1039(2000).
“Living Radical Polymerization with Reversible Addition—Fragmentation Chain Transfer (RAFT Polymerization) Using Ditriocarbamates as Chain Transfer Agents”, Roshan T.A. mayadunne, et al., Macromolecules 1999, 32, 6977-6980.


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