Process for the polymerization of 1-butene

Details Process for the polymerization of 1-butene Process for the polymerization of 1-butene

2006-07-11

2006-07-11

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...

C526S161000, C526S165000, C526S348600, C526S943000

Reexamination Certificate

active

07074864

ABSTRACT:
A process for polymerizing I-butene comprising the step of contacting under polymerization “conditions 1-butene and optionally from 0 to 20% by mol of an alpha olefin with a catalyst system obtainable by contacting a bridged metallocene compound of formula (I) wherein R1and R2are an hydrocarbon radical A is a carbon atom, a germanium atom or a silicon atom; m is 1, 2; M is a metal of group 4 of the Periodic Table of the Elements; X, is hydrogen, a halogen atom, or a group R, OR, OS02CF2, OCOR, SR, NR2or PR2, wherein the substituents R are hydrocarbon radical; L is a moiety of formula (IIa), (IIb), or (IIc) wherein T is an oxygen (0) or sulphur (S) atom or a CH2 group; and R3, R4, R5, R6, R7, R8are hydrogen or hydrocarbon radicals; one or more alumoxanes or compounds able to form an alkylmetallocene cation; and optionally an organo aluminum compound.

REFERENCES:
patent: 5786432 (1998-07-01), Küber et al.
patent: 6444833 (2002-09-01), Ewen et al.
patent: 6482902 (2002-11-01), Bohnen et al.
patent: 6492539 (2002-12-01), Bingel et al.
patent: 6635779 (2003-10-01), Ewen et al.
patent: 19903306 (2000-08-01), None
patent: 172961 (1986-03-01), None
patent: 353318 (1990-02-01), None
patent: 60262804 (1985-12-01), None
patent: 03126704 (1991-05-01), None
patent: 9102012 (1991-02-01), None
patent: 9200333 (1992-01-01), None
patent: 9921899 (1999-05-01), None
patent: 9940129 (1999-08-01), None
patent: 9945043 (1999-09-01), None
patent: 0121674 (2001-03-01), None
patent: 0144318 (2001-06-01), None
patent: 0162764 (2001-08-01), None
patent: 0202659 (2002-01-01), None
A. Rossi et al., “End Groups in 1-Butene Polymerization via Methylaluminoxane and Zirconocene Catalyst;”Macromolecules,vol. 28, p. 1739-1749 (1995).
N. Naga et al., “Effect of co-catalyst system on α-olefin polymerization with rac- and meso-[dimethylsilylenebis(2,3,5-trimethylcyclopentadienyl)]zirconium dichloride;”Macromol. Rapid Commun.vol. 18, p. 581-589 (1997).
W. Kaminsky et al., “Homopolymerizations of α-Olefins with Diastereomeric Metallocene/MAO Catalysts;”Macromolecules,vol. 33(6), p. 1955-1959 (2000).
C. Carman et al., “Monomer Sequence Distribution in Ethylene-Propylene Rubber Measured by13C NMR. 3. Use of Reaction Probability Model;”Macromolecules,vol. 10(3), p. 536-543 (1977).
V. Busico et al., “Regiospecificity of 1-butene polymerization catalyzed by C2-symmetric group IV metallocenes;”Macromol. Rapid Commun.,vol. 16, p. 269-274 (1995).

Affiliated with

Also associated with

Rating

Process for the polymerization of 1-butene does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the polymerization of 1-butene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the polymerization of 1-butene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3531150