Method for producing an elastomer using a transition metal catalyst

Abstract

The present invention relates to a method of producing an elastomer. Specifically, the method of producing an elastomer according to the present invention comprises a step of polymerizing ethylene, propylene, and optionally, a diene monomer in the presence of a catalyst composition containing a transition metal compound. The method of producing an elastomer according to the present invention makes it possible to prepare a high molecular weight, ethylene-propylene or ethylene-propylene-diene, elastic copolymer at a high temperature.

1 - 10 . (canceled) 
     
     
         11 . An ethylene-propylene-diene elastomer characterized in that it is prepared in the presence of a catalyst composition comprising a transition metal compound wherein the transition metal is a transition metal of Group IV;
 wherein the ethylene-propylene-diene elastomer has an ethylene content of being at least 20% by weight but less than 90% by weight, a propylene content of 10 to 80% by weight, and a diene monomer content of being greater than 0 but no more than 20% by weight;   wherein the ethylene-propylene-diene elastomer has a weight average molecular weight (Mw) of 60,000 to 500,000.   
     
     
         12 . The ethylene-propylene-diene elastomer according to  claim 11 , wherein the elastomer has a molecular weight distribution (Mw/Mn) of 1.5 to 15. 
     
     
         13 . The ethylene-propylene-diene elastomer according to  claim 11 , wherein the elastomer has Mooney viscosity of 1 to 150. 
     
     
         14 . The ethylene-propylene-diene elastomer according to  claim 11 , wherein the elastomer has a density of 0.850˜0.895 g/cm 3 . 
     
     
         15 . The ethylene-propylene-diene elastomer according to  claim 11 , wherein the transition metal compound is represented by Chemical formula 1: 
       
         
           
           
               
               
           
         
         in Chemical Formula 1, 
         R1 and R2 are the same with or different from each other, and are independently hydrogen; a C1 to C20 alkyl radical; a C2 to C20 alkenyl radical; a C6 to C20 aryl radical; a silyl radical; a C7 to C20 alkylaryl radical; a C7 to C20 arylalkyl radical; or a metalloid radical of Group IV metal substituted with a hydrocarbyl group; and R1 and R2 or two R2s are optionally linked to each other by an alkylidine radical including a C1 to C20 alkyl or a C6 to C20 aryl radical to form a ring; 
         R3s are the same with or different from each other, and are independently hydrogen; a halogen radical; a C1 to C20 alkyl radical; a C2 to C20 alkenyl radical; a C6 to C20 aryl radical; a C7 to C20 alkylaryl radical; a C7 to C20 arylalkyl radical; a C1 to C20 alkoxy radical; a C6 to C20 aryloxy radical; or an amido radical; and two or more of the R3s are optionally linked to each other to form an aliphatic ring or an aromatic ring; 
         CY1 is an aliphatic or aromatic ring, unsubstituted or substituted with a halogen radical; a C1 to C20 alkyl radical; a C2 to C20 alkenyl radical; a C6 to C20 aryl radical; a C7 to C20 alkylaryl radical; a C7 to C20 arylalkyl radical; a C1 to C20 alkoxy radical; a C6 to C20 aryloxy radical; or an amido radical, and when it has a plurality of the substituents, two or more of them are optionally linked to each other to form an aliphatic ring or an aromatic ring; 
         M is a transition metal of Group IV; and 
         Q1 and Q2 are the same with or different from each other, and are independently a halogen radical; a C1 to C20 alkyl radical; a C2 to C20 alkenyl radical; a C6 to C20 aryl radical; a C7 to C20 alkylaryl radical; a C7 to C20 arylalkyl radical; a C1 to C20 alkyl amido radical; or a C6 to C20 aryl amido radical. 
       
     
     
         16 . The ethylene-propylene-diene elastomer according to  claim 11 , wherein the diene monomer is an 5-ethylidene-2-norbornene.