Olefin polymerization catalysts, their synthesis and use

Details Olefin polymerization catalysts, their synthesis and use Olefin polymerization catalysts, their synthesis and use

2007-10-02

2009-06-02

Choi, Ling-Siu (Department: 1796)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S172000, C526S161000, C526S348000, C502S152000, C502S155000, C502S167000, C502S132000, C502S087000

Reexamination Certificate

active

07541413

ABSTRACT:
A catalyst system for the polymerization or copolymerization of α-olefins comprises a bis(imino)pyridyl complex of a transition metal on a support having an aluminum halide and/or an alkylaluminum halide chemically or physically bonded thereto.

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patent: 1 125 928 (2001-08-01), None
“Highly Active Iron and Cobalt Catalysts for the Polymerization of Ethylene”, B.L. Small et al.,J. Am. Chem.Soc. 120 (1998), pp. 4049-4050.
“Novel olefin polymerization catalysts based on iron and cobalt”, G.J.P. Britovsek et al.,Chem. Commun. (1998), pp. 849-850.
“Ethylene polymerization with Silica-supported bis(imino)pyridyl iron (II) catalysts”,Journal of Catalysis, 234 (2005), pp. 101-110, Zheng et al.
Immobilization and activation of 2,6-bis(imino)pyridyl Fe, Cr and V precatalysts using a MgCl2/AIRn(OEt)3−nsupport: Effects on polyethylene molecular weight and molecular weight distribution,Journal of Molecular Catalysis A: Chemical, 260 (2006), pp. 135-143, Huang et al.
“Preparation of Spherical MgCl2-Supported Late-Transition Metal Catalysts for Ethylene Polymerization”,Macromol. Chem. Phys., 207, (2006), pp. 779-786, Xu et al.
“Iron Catalyzed Polyethylene Chain Growth on Zinc: A Study of the Factors Delineating Chain Transfer versus Catalyzed Chain Growth in Zinc and Related metal Alkyl Systems”,J. Am. Chem. Soc. 126 (34), 2004, pp. 10701-10712.

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