Azaborolinyl metal complexes as olefin polymerization catalysts

Details Azaborolinyl metal complexes as olefin polymerization catalysts Azaborolinyl metal complexes as olefin polymerization catalysts

1996-11-13

1999-05-11

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

502103, 502117, 502162, 526132, 526134, 5263486, 526352, C08F4/16;10/00

Patent

active

059028661

ABSTRACT:
Disclosed is a catalyst having the general formula ##STR1## where L is a ligand having the formula ##STR2## L' is L, Cp, Cp*, indenyle fluorenyl, NR.sub.2, OR, or halogen, L can be bridged to L; X is halogen, NR.sub.2, OR, or alkyl from C.sub.1 to C.sub.12, M is zirconium or hafnium, R is alkyl from C.sub.1 to C.sub.12 or aryl from C.sub.6 to C.sub.12, R.sub.1 is R, alkaryl from C.sub.6 to C.sub.12, aralkyl from C.sub.6 to C.sub.12, hydrogen, or Si(R).sub.3, R.sub.2 is R.sub.1, halogen, COR, COOR, SOR, or SOOR, R.sub.3 is R.sub.2, OR, N(R).sub.2, SR, or a fused ring system, Cp is cyclopentadienyl, Cp* is pentamethylcyclopentadienyl, n is 0 to 3, and L.sub.B is an optional Lewis base. Also disclosed is a method of making a poly-.alpha.-olefin comprising polymerizing an .alpha.-olefin monomer using a catalyst such as that described above where M can be titanium, zirconium, or hafnium.

REFERENCES:
patent: 5237069 (1993-08-01), Newman
patent: 5637659 (1997-06-01), Krishnamurti et al.
Article: By Gunter Schmidt et al., "Praparative Und Strukturelle Untersuchunger an .eta. -1,2-Azaborolinyl-Komplexen Des Titans, Vanadins, Eisens Und Cobalts," Chem. Ber. 115, 3830-3841 (1982).
Article: By Gunter Schmid et al., "Titan-und Vanadiumechlorid-Komplexe mit Diazadiborelidin-und 1,2-Azaborolinyl-Liganden," Chem. Ber., 118, 2418-2428 (1985).
Article: By Joachim Schulze et al., "1-t-Butyl-2-Methyl-1,2-Azaborolinyl-Eisen-.pi.-Komplexe," Journal of Organometallic Chemistry, 193, 83-91 (1980).
Article: By Roger W. Quan et al., "Pentamethylcyclopentadienyl Aminoborollide Derivatives of Zirconium and Hafnium: A New Class of Amphoteric Molecule Having both Lewis Acids and Lewis Base Sites," J. Am. Chem. Soc., 116, 4489-4490 (1994).

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