Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0


C525S525000, C525S535000, C528S419000, C549S561000, C549S562000, C558S243000

Reexamination Certificate



A toughener comprising a trithiocarbonate polymer having an epoxy end group is described which is utilized with various thermosettable polymers such as epoxy, polyurethane, and the like. A toughened composition is made by curing the thermosettable polymer and the toughener utilizing various curing agents.

patent: 2858292 (1958-10-01), Swart et al.
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: 5604084 (1997-02-01), Grzeskowiak 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: 0704460 (1996-04-01), None
patent: 9801478 (1998-01-01), None
patent: 9905099 (1999-02-01), None
patent: 9931144 (1999-06-01), None
patent: 9935177 (1999-07-01), None
Encyclopedia of Polymer Science and Engineering vol. 4, John Wiley & Sons, Inc. p. 543 © 1986.*
G.P. Moss, P.A.S. Smith, D. Tavernier, Pure and Applied Chemistry, vol. 67, pp. 1307-1375 (1995).*
Hawley's Condensed Chemical Dictionary, 12th ed., Richard J. Lewis, Sr. , © 1993 by Van Nostrand Reinhold. p. 594.*
Concise Chemical Dictionary, edited by Drs. Hans-Dieter Jakubke and Hans Jeschkeit, © 1993 by Walter de Gruyter & Co., p. 490.*
McGraw-Hill Dictionary of Chemical Terms, 3rd ed. edited by Sybil P. Parker, © 1984 McGraw-Hill, Inc., p. 200.*
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, eta l., 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”, lacopo 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 Trithicarbonates”, 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 (2001).
“Dithiocarbamates as universal reversible addition-fragmentation chain transfer agents”, M. Destarac, et al, Macromol. Rapid Commun., 21, No. 15, (2000).
“Living Radical Polymerization with Reversible Addition—Fragmentation Chain Transfer (RAFT Polymerization) Using Ditriocarbamates as Chain Transfer Agents”, Roshan T.A. mayadunne, et al., CSIROMolecular Science, Bag 10, Clayton, South, Victoria 3169, Australia, Received May 3, 1999; Revised Manuscript Received Aug. 9, 1999.


Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.


S,S′-bis-(α,... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with S,S′-bis-(α,..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and S,S′-bis-(α,... will most certainly appreciate the feedback.

Rate now


Profile ID: LFUS-PAI-O-3439217

All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.