Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2006-11-07
2006-11-07
Teskin, Fred (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S117000, C526S170000, C526S171000, C526S172000, C526S303100, C526S305000, C526S307100, C526S307800, C526S317100, C526S346000, C525S384000, C556S015000, C556S016000
Reexamination Certificate
active
07132491
ABSTRACT:
Organometallic reversible addition-fragmentation chain transfer reagents (RAFT reagents), processes of free radical polymerization employing the same and polymers with low polydispersity index obtained thereby. The process includes polymerizing at least one monomer with at least one initiator and at least one organometallic RAFT reagent to obtain polymers having terminal organometallic functional groups with low polydispersity index. In addition, the terminal organometallic functional group may be removed by subjecting the obtained polymer to elimination to provide the corresponding organic polymers.
REFERENCES:
patent: 6667376 (2003-12-01), Charmot et al.
Mayadunne et al, Living Radical Polymerization with Reversible Addition-Fragmentation Chain Transfer . . . Using Dithiocarbamates as Chain Transfer Agents, Macromolecules, 1999, 32, 6977-6980.
Yih et al, Syntheses, Reactivities and Molecular Structures of Tungsten Complexes containing the Diphenylphosphinodithioformato Ligand, J. Chem. Soc. Dalton Trans. 1995, 1305-1313.
Yih and Lin, Syntheses and reactivity of molybdenum complexes containing the diphenylphosphinodithioformato ligand, Journal of Organometallic Chemistry 577 (1999) 134-139.
Chen Yi-Chun
Hsiao Ming-Siao
Hsu Fong Yee
Lo Yih-Hsing
Shih Kuo-Chen
Industrial Technology Research Institute
Teskin Fred
Thomas Kayden Horstemeyer & Risley
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