Carborane trianion based catalyst

Details Carborane trianion based catalyst Carborane trianion based catalyst

2006-05-30

2006-05-30

Lu, Caixia (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C556S007000, C556S008000, C556S051000, C502S167000, C502S200000, C526S172000

Reexamination Certificate

active

07053158

ABSTRACT:
Disclosed is a Ziegler-Natta catalyst for olefin polymerization comprising a metal cation of Group 4 or 14 of the Periodic Table (IUPAC 1976) that is coordinated toa. a carborane dianion group;b. a heteroatom anion, said heteroatom being preferably in the terminal position of a hydrocarbyl bridge comprising at least two carbon atoms, wherein at least one bridging carbon atom may be replaced by Si; andc. a valence group.

REFERENCES:
patent: 4363747 (1982-12-01), Hawthorne et al.
patent: 5407884 (1995-04-01), Turner et al.
patent: 5483014 (1996-01-01), Turner et al.
patent: 5830958 (1998-11-01), Peifer et al.
patent: 6245706 (2001-06-01), Hlatky
patent: 0 638 593 (1995-02-01), None
patent: 07-070222 (1995-03-01), None
patent: WO 97/10248 (1997-03-01), None
patent: WO 99/05182 (1999-02-01), None
patent: WO 00/75204 (2000-12-01), None
patent: WO 01/00691 (2001-01-01), None
patent: WO 01/16189 (2001-03-01), None
Crowther et al., “Group 4 metal dicarbollide chemistry, synthesis, structure and reactivity of electrophilic alkyl complexes (Cp)(C2B9H11)M(R) (M=Hf, Zr).” Journal American Chemical Society, 113:1455-1457, 1991.
Kim et al., “Dicarbollide analogues of the constrained-geometry polymerization catalyst.” Organometallics, 20: 4298-4300, 2001.
Wilson et al., “Development of carborane synthons: Synthesis and chemistry of (aminoalkyl) carboranes,” Inorganic Chemistry, 31: 1955-1958, 1992.
Zhu et al., “The first half-sandwich do-metallacarboranes stabilized by metal-nitrogen sigma bond using C(cage)-appended anionic alkylamido moiety: a synthetic investigation.” Inorganic Chemistry Communications, 4:486-489, 2001.
Zhu et al., “Synthesis and characterization of constrained-geometry half-sandwich sila- and germacarboranes derived from a trianionic C(cage)-appended alkyloxo-C2B9-carborane ligand.” Inorganic Chemistry Communications, 5: 296-299, 2002.
Russell N. Grimes,Carboranes, New York: Academic Press, 1970, p. 197-198, ISBN 75-127684.
Dodge et al., Titanium and zirconium Et2C2B4H4-Metal-Phosphine complexes: Synthesis, characterization, and ethylene polymerization activity. Journal of the American Chemical Society, 12:10573-10580, 2000.
Kim et al., Dicarbollide analogues of the constrained-geometry polymerization catalyst. Organometallics, 20: 4298-4300, 2001.
Wang et al., Reactions of L2Zr(NMe2)2with Me3Al and PhC=CH: synthesis and structural charaterization of new zirconium carborane complexes [L2=Me2Si(C9H6)(C2B10H10) and Me2C(C5H4)(C2B10H10)]. Journal of Organometallic Chemistry, 683: 39-43, 2003.
Wang et al., Synthesis, structural characterization, and olefin polymerization behavior of Group 4 metal complexes with constrained-geometry carborane ligands. Organometallics, 20: 5110-5118, 2001.
Wang et al., Multiple insertion of unsaturated molecules into the Zr-N bonds of [n5:6-Me2A(C9H6)(C2B10H10)]Zr(Nme2)2(A=C, Si). Organometallics, 22: 4522-4531, 2003.
Zi et al., Synthesis, structural charaterization, and catalytic property of Group 4 metal carborane compounds with a1Pr2NB-bridged constrained-geometry ligand. Organometallics, 21: 3850-3855, 2002.
International Search Report for International Application No. PCT/SG2004/000297.

Affiliated with

Also associated with

Rating

Carborane trianion based catalyst does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Carborane trianion based catalyst, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Carborane trianion based catalyst will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3636902