Rare earth metal complex, polymerization catalyst, and...

Details Rare earth metal complex, polymerization catalyst, and... Rare earth metal complex, polymerization catalyst, and...

2007-07-05

2010-12-14

Lu, Caixia (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S133000, C526S134000, C526S165000, C526S319000, C526S348000, C526S943000, C502S103000, C502S152000, C502S156000, C556S001000, C556S011000

Reexamination Certificate

active

07851569

ABSTRACT:
A rare earth metal complex represented by the formula (1):in which A represents a Group 14 element of the periodic table, Cp represents a group having a substituted or unsubstituted cyclopentadienyl anion moiety, Ln represents a Group 3 metal atom or a lanthanoid metal atom, R1to R6are the same or different, and represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, a silyl group substituted with a hydrocarbon group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, R7represents an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms, Xs represent a monoanionic ligand, Ys represent a neutral ligand, m represents an integer of 1 to 3, and n represents an integer of 0 to 3. The rare earth metal complex is useful as, for example, a catalyst for polymerization reaction of olefins. A polar monomer such as a lactone can be polymerized using the rare earth metal complex as a catalyst.

REFERENCES:
patent: 5028667 (1991-07-01), McLain et al.
patent: 6329478 (2001-12-01), Katayama et al.
patent: 6548686 (2003-04-01), Nabika et al.
patent: 2002/0058585 (2002-05-01), Christopher et al.
patent: 2007/0232758 (2007-10-01), Hou et al.
patent: 05-247184 (1993-09-01), None
patent: 06-263783 (1994-09-01), None
patent: 09-087313 (1997-03-01), None
patent: 2003-327594 (2003-11-01), None
patent: 2004-204145 (2004-07-01), None
patent: 2005-002072 (2005-01-01), None
patent: WO 91/05001 (1991-04-01), None
patent: WO 00/18808 (2000-04-01), None
patent: WO 2006/004068 (2006-01-01), None
Cui et al., “Alternating Copolymerization of Cyclohexene Oxide and Carbon Dioxide Catalyzed by Organo Rare Earth Metal Complexes,” Macromolecules, 2005, 38:4089-4095.
Tanaka et al., “Unique Dual Function of La(C5Me5)[CH(SiMe3)2]2(THF) for Polymerizations of Both Nonpolar and Polar Monomers,” Journal of Polymer Science, Part A: Polymer Chemistry, 2001, 39:1382-1390.
Yamashita et al., “Organolanthanide-Initiated Living Polymerizations of ε-Caprolactine, δ-Valerolactone, and β-Propiolactone,” Macromolecules, 1996, 29:1798-1806.

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