Patent ID: 6235919
Filing Date: 2001-05-22
Classification: C07F,C08F

Abstract:
A process for preparing a complex of aluminum and a bridged phosphinimine comprising reacting moles of a bridged phosphinimine compound of the formula I: ##STR7##wherein each R.sup.1 is independently selected from the group consisting of C.sub.1-8 straight or branched alkyl radical or a C.sub.6-12 cyclic aliphatic or aromatic radical; radicals of the formula Si(R.sup.4).sub.3 wherein each R.sup.4 is independently selected from the group consisting of C.sub.1-8 alkyl and alkoxy radicals; and R.sup.3 is selected from the group consisting of C.sub.1-8 alkyl radicals and C.sub.6-12 aromatic radicals which are unsubstituted or substituted with one or more halogen atoms or a C.sub.1-4 alkyl radical with an aluminum compound of the formula III (Al(R.sup.2).sub.3-n X.sub.n) wherein each R.sup.2 is independently selected from the group consisting of C.sub.1-8 alkyl radicals, X is a halogen atom and n is 0, 1 or 2 under an inert atmosphere, in an inert hydrocarbyl solvent or diluent at a temperature from 50.degree. C. to 200.degree. C., provided that if the molar ratio of compound of formula I to aluminum compound is from 0.8 to 1.20; R.sup.3 can not be phenyl if R.sup.1 is trimethyl silyl, X is chlorine and n is 2.