Monocyclopentadienyl titanium metal compounds for ethylene-α-olefin-copolymer production catalysts

Abstract

The invention is a catalyst system including a monocyclopentadienyl titanium compound and an alumoxane component which is highly productive for polymerizing ethylene and alpha-olefins to produce a high molecular weight ethylene-alpha-olefin copolymer having a high content of alpha-olefin.

I claim:  
     
       1. A compound having the formula:                    
       wherein R 1  and R 2  are each independently a C 1  to C 6  a hydrocarbyl radical, each Q and Q′ is independently a halide or alkyl radical, R′ is an aliphatic or alicyclic hydrocarbyl radical having from  1   3 to 20 carbon atoms and R′ is covalently bonded to the nitrogen atom through a 1° or 2° carbon atom, L is a neutral Lewis base where “w” denotes a number from 0 to 3 and each R is, independently a C 1-4  hydrocarbyl radical or hydrogen, x is 0, 1, 2, 3 or 4, and two adjacent R groups may join to form a C 4-10  ring. 
     
     
       2. The compounds of claim  1 , wherein R′ is an alicyclic hydrocarbyl radical. 
     
     
       3. The compound of claim  2 , wherein R′ is cyclododecyl. 
     
     
       4. The compound of claim  3 , wherein R 1  and R 2  are methyl. 
     
     
       5. The compound of claim  4 , wherein each Q is chlorine or methyl. 
     
     
       6. The compound of claim  1 , having the formula:                    
       wherein R 1  and R 2  are each independently a C 1  to C 6  a hydrocarbyl radical, each Q and Q′ is independently a halide or alkyl radical, R′ is an aliphatic or alicyclic hydrocarbyl radical of from  1   3 to 20 carbon atoms and R′ is covalently bonded to the nitrogen atom through a 1° or 2° carbon atom, and L is a neutral Lewis base where “w” denotes a number from 0 to 3. 
     
     
       7. The compound of claim  6 , wherein R′ is an alicyclic hydrocarbyl radical. 
     
     
       8. The compound of claim  7 , wherein R′ is cyclodedecyl. 
     
     
       9. The compound of claim  8 , wherein R 1  and R 2  are methyl. 
     
     
       10. The compound of claim  9 , wherein each Q is chlorine or methyl.