Silica-supported polymerization catalyst

Details Silica-supported polymerization catalyst Silica-supported polymerization catalyst

2003-08-14

2008-11-18

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...

C526S125300, C526S158000, C526S351000, C526S352000, C502S103000, C502S152000, C502S158000

Reexamination Certificate

active

07452947

ABSTRACT:
A process for the preparation of a silicon containing transition metal compound that includes the steps of (a) non-hydrolytic sol-gel condensation of a silane of formula LxSiQnwherein L is a σ-bonded ligand, Q is an anionic ligand, and x+n=4 with a halogenated silane (or siloxane) and an alkoxysilane, (b) optionally alkylation, (c) deprotonation and (d) addition of a transition metal compound. The process allows for the preparation of transition metal compounds which may suitably be used with cocatalysts for the polymerization of olefins, in particular for such processes carried out in the gas phase.

REFERENCES:
dos Santos et al., “Indenyl-Silica Xerogels: New Materials for Supporting Metallocene Catalysts”, Applied Catalysis A: General, vol. 220, 287-302 (2001).
dos Santos et al., “I::thylene (co)polymerization with Supported-Metallocenes Prepared by the Sol-Gel Method”, Polymer, vol. 42, 4517-4525 (2001).
Hay et al., “A Versatile Route to Organically-Modified Silicas and Porous Silicas via the Non-Hydrolytic Sol-Gel Process”, Journal of Materials Chemistry, vol. 10, 1811-1818 (2000).
Dos Santos, J. H. Z. et al., “Indenyl-Silica Xerogels: New Materials for Supporting Metallocene Catalysts”, Applied Catalysis A: General, vol. 220, pp. 287-302, (2001).
Dos Santos, J. H. Z. et al., “Ethylene (co)polymerization with Supported-Metallocenes Prepared by the Sol-Gel Method”, Polymer, vol. 42, pp. 4517-4525, (2001).
Apperley, D. et al., “Silica-Dimethylsiloxane Hybrids-Non-Hydrolytic Sol-Gel Synthesis and Characterization by NMR Spectroscopy”, Chem. Mater., vol. 14, No. 3, pp. 983-988, (2002).
Hay, J. N. et al., “Synthesis of Organic-Inorganic Hybrids via the Non-Hydrolytic Sol-Gel Process”, Chem. Mater., vol. 13, No. 10, pp. 3396-3403, (2001).
Hay, J. N. et al., “A Versatile Route to Organically-Modified Silicas and Porous Silicas via the Non-Hydrolytic Sol-Gel Process”, Journal of Materials Chemistry, vol. 10, No., pp. 1811-1818, (2000).

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