Method of polymerizing olefins using borabenzene catalysts

Details Method of polymerizing olefins using borabenzene catalysts Method of polymerizing olefins using borabenzene catalysts

1996-05-17

1997-06-10

Wu, David W.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526132, 526160, 526161, 526280, 526281, 5263482, 5263484, 5263485, 5263486, 5263487, 526352, 526943, 502117, 502155, C08F 464

Patent

active

056376596

ABSTRACT:
Disclosed is a catalyst having the general formula ##STR1## where Q is a ligand containing the ring ##STR2## R is hydrogen, N(R').sub.2, OR', or R', each R' is independently selected from alkyl from C.sub.1 to C.sub.10, aryl from C.sub.6 to C.sub.15, alkaryl C.sub.7 to C.sub.15, and aralkyl from C.sub.7 to C.sub.15, each X is independently selected from hydrogen, halogen, alkoxy from C.sub.1 to C.sub.10.sub., dialkylamino from C.sub.1 to C.sub.10, methyl, ##STR3## each R.sub.1 is independently selected from halogen, alkoxy from C.sub.1 to C.sub.10, and R', L is ##STR4## Q, or X, where L can be bridged to Q, B is an optional base, "n" is 0 to 5, and M is titanium, zirconium, or hafnium.

REFERENCES:
patent: 5457171 (1995-10-01), Langhauser et al.
patent: 5468889 (1995-11-01), Srebnik et al.
Article: "Borabenzene Derivatives. 21..sup.1 2,4-Penta-Dienylboranes as Key Intermediates of a Novel Route to Boracyclohexadienes and Boratabenzenes," Structure of [Li(TMPDA)] (C.sub.5 H.sub.5 BNMe.sub.2), by Gerhard E. Herberich et al., Organometallics, 1993, pp. 2891-2893.
Structure of [Li(TMPOA)] (C.sub.5 H.sub.5 BNMe.sub.2), by Gerhard E. Herberich et al., Organometallics, 1993, pp. 2891-2893.

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