The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 2008
Filed:
Aug. 14, 2003
Henri Cramail, Sainte Terre, FR;
Alain Deffieux, Bordeaux, FR;
Cedric Dever, Talence, FR;
Sergio Mastroianni, Martigues, FR;
Henri Cramail, Sainte Terre, FR;
Alain Deffieux, Bordeaux, FR;
Cedric Dever, Talence, FR;
Sergio Mastroianni, Martigues, FR;
BP Chemicals Limited, Middlesex, GB;
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 LSiQwherein 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.