Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Reexamination Certificate
2005-04-19
2005-04-19
Choi, Ling-Siu (Department: 1713)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
C502S103000, C502S117000, C502S120000, C502S152000, C526S124100, C526S160000, C526S943000, C556S178000
Reexamination Certificate
active
06881695
ABSTRACT:
An olefin polymerization catalyst is provided which makes use of a modified methylaluminoxane and thus stably exhibits an activity equivalent to, or higher than, the activity achieved by polymethylaluminoxane. Specifically, the olefin polymerization catalyst is in the form of a modified methylaluminoxane preparation prepared from: an organoaluminum compound represented by the following general formula (I):in-line-formulae description="In-line Formulae" end="lead"?R1mAlX3-m (I)in-line-formulae description="In-line Formulae" end="tail"?wherein R1represents a straight-chained or branched hydrocarbon group selected from the group consisting of alkyl, alkenyl, and aryl groups having 2 to 20 carbon atoms; X represents a hydrogen atom, halogen atom, alkoxy group, or allyloxy group; and 0<m≦3; and trimethyl aluminum, wherein the mole fraction of methyl group of the aluminoxane unit with respect to the total number of moles of the hydrocarbon group having 2 to 20 carbon atoms and methyl group present in the modified methylaluminoxane preparation is 65 mol % or greater.
REFERENCES:
patent: 4937217 (1990-06-01), Chang
patent: 5006500 (1991-04-01), Chang
patent: 5041584 (1991-08-01), Crapo et al.
patent: 5157008 (1992-10-01), Sangokoya et al.
patent: 0 324 856 (1989-07-01), None
patent: 0 372 617 (1990-06-01), None
patent: 0 393 358 (1990-10-01), None
patent: 4-46906 (1992-02-01), None
patent: 9915534 (1999-04-01), None
Database CA Online, Chemical Abstracts Service, Database accession No. 115:1600019, XP002248182 (Abstract of JP 03-103407 A, Apr. 30, 1991).
Database WPI, Section Ch, Week 199213, Derwent Publications Ltd., London, GB, AN 1992-102341, XP002248183 (Abstract of JP 04 046906 A, Feb. 17, 1992).
Kaji Eiichi
Kanazawa Hideki
Takasugi Toshihiro
Toyota Kouji
Choi Ling-Siu
Tosoh Finechem Corporation
Wenderoth , Lind & Ponack, L.L.P.
LandOfFree
Olefin polymerization catalyst and method for producing... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Olefin polymerization catalyst and method for producing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Olefin polymerization catalyst and method for producing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3370865