Single site catalyst with methyl aluminoxane or borate free and

Details Single site catalyst with methyl aluminoxane or borate free and Single site catalyst with methyl aluminoxane or borate free and

1999-02-12

2000-11-21

Nazario-Gonzalez, Porfirio

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548110, 556 8, 526132, 526352, 526943, 502103, 502117, C07F 1900, C07F 502, C07F 700, C07F 1700

Patent

active

061505293

ABSTRACT:
A novel organometallic compound is disclosed which can be used, in conjunction with a trialkyl or bialkyl aluminum cocatalyst, for catalyzing the polymerization and copolymerization of ethylene without requiring the use of either methyl aluminoxane or borate as cocatalyst. The organometallic compound is represented by the formula of (C.sub.5 R.sub.n H.sub.5-n)(L)MX.sub.a Y.sub.b ; wherein: (a) C.sub.5 R.sub.n H.sub.5-n is a substituted or unsubstituted cyclopentadienyl group, in which n is an integer between 0 and 5, and R is C.sub.1 to C.sub.6 alkyl group; (b) L is tetrapyrazolyl borate, hydrotrispyrazolyl borate, dihydrobispyrazolyl borate or hydrotris(3,5-dimethylpyrazolyl) borate; (c) M is a Group IIIB, Grcup IVB, or Group VB transitional metal; (d) a and b are integers such that a+b=m-2, where m is the valance of M; and (e) X and Y, which can be the same of different from each other, are halogen atoms or ligands represented by the formula of ER.sup.1 or ER.sup.1 R.sup.2, where E is a Group VA or VIA element, and R.sup.1 and R.sup.2, which can be the same or different from each other, are C.sub.1 to C.sub.6 alkyl group or substituted aryl group. Preferably, M is a Group IVB transitional metal and a=b=1, and the organometallic compound is then represented by the formula of (C.sub.5 R.sub.n H.sub.5-n)(L)MXY.

REFERENCES:
patent: 4870042 (1989-09-01), Kohara et al.
patent: 5237069 (1993-08-01), Newman
patent: 5312794 (1994-05-01), Kelsey
patent: 5519099 (1996-05-01), Wang et al.
patent: 5684096 (1997-11-01), Wang et al.
patent: 5891816 (1999-04-01), Wang et al.

Affiliated with

Also associated with

Rating

Single site catalyst with methyl aluminoxane or borate free and does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Single site catalyst with methyl aluminoxane or borate free and , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single site catalyst with methyl aluminoxane or borate free and will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1258767