Novel dendrimer compounds, method for the production thereof, use thereof as catalysts

Abstract

The present invention relates to a novel dendrimic compounds, to a method for the production thereof and to the use thereof as catalysts for the production of polymers, in particular to the use thereof as co-catalysts for metallocenes for polymerizing unsaturated compounds.

1 . Dendrimeric compounds of the general formula 
       R 1   4-i Me 1 [(R 4 ) n X ]i   (I), 
       in which 
 X represents Me 2 R 2 R 3 (R y ) r ,  
 R 1 , R 2 , R 3 , R y  are identical or different, may optionally be mono—or polysubstituted and represent hydrogen, C 5 —C 20  cycloalkyl, C 1 —C 20  alkyl, C 7 —C 40  aralkyl, C 6 —C 40  aryl, C 1 —C 10  alkoxy, C 6 —C 40  aryloxy, silyloxy or halogen,  
 R 4  represents an optionally mono—or polysubstituted alkylene, alkenylene or alkynylene residue, which is optionally interrupted by one or more heteroatoms,  
 Me 1  represents an element of group IVa of the periodic system of the elements (IUPAC nomenclature),  
 Me 2  represents an element of group IIIa of the periodic system of the elements (IUPAC nomenclature),  
 i represents an integer from 2 to 4,  
 n represents an integer from 1 to 20 and  
 r represents 0 or 1, 
 wherein, when r=1, the Me 2  residue bears a negative formal charge and in the event of a negative formal charge on Me 2 , this is offset by a cation,  
 or in which  
 
 X represents Me 1 R 5   a [(R 4 ) m Me 2 R 2 R 3 (R y ) r ] 3-a ,  
 Me 1 , Me 2 , R 1 , R 2 , R 3 , R 4 , R y , i, n, r have the above—stated meanings,  
 R 5  has the meaning of the residues R 1 , R 2 , R 3 , R y ,  
 m is identical to or different from n and represents integers from 1 to 20 and  
 a represents 0, 1 or 2,  
 or in which  
 X represents Me 1 R 5   a [(R 4 ) m Me 1 R 6   b [(R 4 ) p Me 2 R 2 R 3 (R y ) r ] 3-b ] 3-a ,  
 Me 1 , Me 2 , R 1 , R 2 , R 3 , R 4 , R y , i, n, r, m, a have the above—stated meanings,  
 R 6  has the meaning of the residues R 1 , R 2 , R 3 , R y , R 5 ,  
 b represents 0, 1 or 2 and  
 p represents integers from 1 to 20,  
 wherein the compounds described in DE 195 16 200 are excluded, said compounds being produced by the reaction of silicon tetrachloride in a Grignard reaction to form tetraallylsilane, which is subsequently reacted twice or more alternately 
 a) with trichlorosilane in a quantitative reaction in the presence of a catalyst and then  
 b) with an allyl compound in a Grignard reaction using a suitable solvent in each case until a dendrimeric skeleton comprising outwardly pointing allyl groups is obtained, the outer allyl groups of which  
 c) are derivatised in a hydroboration reaction with 9—borabicyclo—[3.3.1]nonane.  
 
 
     
     
         2 . Method for the production of the novel dendrimeric compounds of  claim 1 , characterised in that compounds of the general formula (IV) 
       R 1   4-i Me 1 [(R 7 ) n-2 Y] i   (IV) 
       in which 
 Y represents CR 8 ═CR 9 R 10 ,  
 R 8 , R 9  and R 10  are identical or different and represent hydrogen, alkyl, aryl or halogen,  
 R 7  has the meaning of residue R 4  in the formula (I),  
 n represents an integer from 2 to 20,  
 R 1 , Me 1  and i have the definition stated for the formula (I),  
 or in which  
 Y represents Me 1 R 5   a [(R 7 ) m-2 (CR 8 ═CR 9 R 10 )] 3-a ,  
 R 5  has the definition stated in the formula (I),  
 or in which  
 Y represents Me 1 R 5   a [(R 4 ) m Me 1 R 6   b [(R 7 ) p-2 (CR 8 ═CR 9 R 10 )] 3-b ] 3-a ,  
 R 6  has the definition stated in formula (I),  
 m, p represent integers from 2 to 20 and in which all the other residues stated in the formulae have the above—stated meanings for Y,  
 are reacted with compounds of the general formula (V) 
 R 11 Me 2 R 2 R 3   (V), 
 in which  
 R 11  represents hydrogen or C 1 —C 30  alkyl and  
 Me 2 , R 2  and R 3  have the meanings stated in the formula (I),  
 and, in the event that r=1, the resultant product is further reacted with compounds of the general formula (VI) 
 Me 3 —R y   (VI), 
 in which  
 Me 3  represents an alkali metal and R y  has the above—stated meaning,  
 or with compounds of the general formula (VII) 
 Hal q —Me 4 —R y   2-q   (VII), 
 in which  
 Me 4  represents an alkaline earth metal or transition metal of subgroups 1 or 2,  
 Hal represents halogen,  
 q represents 0 or 1 and  
 R y  has the meaning as before.  
 
     
     
         3 . Use of the dendrimeric compounds of the formula (I), including the dendrimeric compounds excluded from the formula (I), as catalysts.  
     
     
         4 . Use of the dendrimeric compounds according to  claim 3  for the production of catalyst systems based on transition metal complexes.  
     
     
         5 . Use of the dendrimeric compounds according to  claim 3  for the polymerisation of unsaturated organic compounds.  
     
     
         6 . Use of the dendrimeric compounds according to  claim 3  for the production of elastomers.  
     
     
         7 . Use of the dendrimeric compounds according to  claim 3  for the production of elastomers based on copolymers of ethylene and α—olefins.  
     
     
         8 . Use of the dendrimeric compounds according to  claim 3  for the production of EP(D)M.