Saline chemical composition, method for producing the same and the use thereof in catalyst systems for producing polyolefins

Abstract

A salt-like chemical compound of the formula (I), (C 6 R 1 5 ) 3 MR 2   (I) where R 1 are identical or different and are each a hydrogen atom, a halogen atom, C 1 -C 20 -alkyl, C 6 -C 14 -aryl, C 1 -C 10 -alkoxy, C 2 -C 10 -alkenyl, C 7 -C 20 -arylalkyl, C 7 -C 20 -alkylaryl, C 6 -C 10 -aryloxy, C 1 -C 10 -haloalkyl, C 6 -C 10 -haloaryl, C 2 -C 10 -alkynyl or C 3 -C 20 -alkylsilyl, M is an element of main group III of the Periodic Table of the Elements, and R 2 is a substituted or unsubstituted heterocycle, can be used in catalyst systems for preparing polyolefins and also a process for its preparation.

We claim:  
     
         1 . A chemical compound of the formula (I), 
       (C 6 R 1   5 ) 3 MR 2   (i) 
       where 
 R 1  are identical or different and are each a hydrogen atom, a halogen atom, C 1 -C 20 -alkyl, C 6 -C 14 -aryl, C 1 -C 10 -alkoxy, C 2 -C 10 -alkenyl, C 7 -C 20 -arylalkyl, C 7 -C 20 -alkylaryl, C 6 -C 10 -aryloxy, C 1 -C 10 -haloalkyl, C 6 -C 10 -haloaryl, C 2 -C 10 -alkynyl or C 3 -C 20 -alkylsilyl,  
 M is an element of main group III of the periodic table of the elements, and  
 R 2  is a substituted or unsubstituted heterocycle,  
 which has a salt-like structure.  
 
     
     
         2 . A salt-like chemical compound of the formula (I) as claimed in  claim 1 , which is obtainable by protonating the reaction products of compounds of heterocycles R 2  containing elements of main group I or II of the Periodic Table of the Elements and compounds of the formula (C 6 R 1   5 ) 3 M.  
     
     
         3 . A chemical compound of the formula (I) as claimed in  claim 1  or  2 , wherein the heterocycle is a pyrrolium, indolium or imidazolium group.  
     
     
         4 . A salt-like chemical compound of the formula I as claimed in any of  claims 1  to  3 , wherein M is aluminum or boron.  
     
     
         5 . A salt-like chemical compound as claimed in any of  claims 1  to  4 , wherein the heterocycle R 2  is unsubstituted or substituted by at least one halogen atom, C 1 -C 20 -alkyl, C 1 -C 10 -alkoxy, C 2 -C 11 -alkenyl, C 7 -C 20 -arylalkyl, C 7 -C 20 -alkylaryl, C 6 -C 10 -aryloxy, C 1 -C 20 -haloalkyl, C 6 -C 14 -haloaryl, C 2 -C 10 -alkynyl or C 3 -C 20 -alkylsilyl.  
     
     
         6 . A salt-like chemical compound as claimed in any of  claims 1  to  5 , wherein the heterocycle R 2  is unsubstituted.  
     
     
         7 . A process for preparing compounds of the formula (I) as claimed in any of  claims 1  to  6 , in which compounds of heterocycles R 2  containing elements of main group I or II of the Periodic Table of the Elements are firstly reacted with compounds of the formula (C 6 R 1   5 ) 3 M in a solvent to form compounds of the formula [(C 6 R 1   5 ) 3 MR 2 ] −  which are subsequently protonated by reaction with a proton donor, where R 1 , M and R 2  are as defined in formula (I).  
     
     
         8 . A catalyst system comprising at least one organometallic compound (A) of a transition metal, at least one compound of the formula (I) as claimed in any of  claims 1  to  6 , if desired an alkyl compound (B) of an element of group III or IV of the Periodic Table of the Elements and, if desired, at least one support component (C).  
     
     
         9 . A process for the polymerization of olefins, wherein the polymerization is carried out in the presence of a catalyst system as claimed in  claim 8.