Novel neodymium compound and catalyst for diene polymerization including the same

Abstract

The present invention relates to a neodymium compound represented by Formula 1 and a catalyst for diene polymerization including the same.

1 . A neodymium compound represented by following Formula 1: 
       
         
           
           
               
               
           
         
         in Formula 1, wherein 
         R 1  is a linear or branched alkyl group having 6 to 12 carbon atoms, 
         R 2  and R 3  are independently hydrogen, or a linear or branched alkyl group having 2 to 8 carbon atoms, and 
         R 2  and R 3  are not hydrogen at the same time. 
       
     
     
         2 . The neodymium compound of  claim 1 , wherein
 R 1  is a linear or branched alkyl group having 6 to 8 carbon atoms,   R 2  and R 3  are independently represent hydrogen, or a linear or branched alkyl group having 2 to 6 carbon atoms, and   R 2  and R 3  are not hydrogen at the same time.   
     
     
         3 . The neodymium compound of  claim 1 , wherein the neodymium compound is selected from the group consisting of Nd(2,2-diethyl decanoate) 3 , Nd(2,2-dipropyl decanoate) 3 , Nd(2,2-dibutyl decanoate) 3 , Nd(2,2-dihexyl decanoate) 3 , Nd(2,2-dioctyl decanoate) 3 , Nd(2-ethyl-2-propyl decanoate) 3 , decanoate) 3 , Nd(2-propyl-2-butyl decanoate) 3 , Nd(2-propyl-2-hexyl decanoate) 3 , Nd(2-propyl-2-isopropyl decanoate) 3 , Nd(2-butyl-2-hexyl decanoate) 3 , Nd(2-hexyl-2-octyl decanoate) 3 , Nd(2-t-butyl decanoate) 3 , Nd(2,2-diethyl octanoate) 3 , Nd(2,2-dipropyl octanoate) 3 , Nd(2,2-dibutyl octanoate) 3 , Nd(2,2-dihexyl octanoate) 3 , Nd(2-ethyl-2-propyl octanoate) 3 , Nd(2-ethyl-2-hexyl octanoate) 3 , Nd(2,2-diethyl nonanoate) 3 Nd(2,2-dipropyl nonanoate) 3 , Nd(2,2-dibutyl nonanoate) 3 , Nd(2,2-dihexyl nonanoate) 3 , Nd(2-ethyl-2-propyl nonanoate) 3 , and Nd(2-ethyl-2-hexyl nonanoate) 3 . 
     
     
         4 . The neodymium compound of  claim 1 , wherein the neodymium compound is selected from the group consisting of Nd(2,2-diethyl decanoate) 3 , Nd(2,2-dipropyl decanoate) 3 , Nd(2,2-dibutyl decanoate) 3 , Nd(2,2-dihexyl decanoate) 3 , and Nd(2,2-dioctyl decanoate) 3 . 
     
     
         5 . The neodymium compound of  claim 1 , wherein a weight average molecular weight of the neodymium compound is 800 to 1,400. 
     
     
         6 . A catalyst for diene polymerization, comprising:
 the neodymium compound according to  claim 1 ;   a halogen compound; and   an organometal compound.   
     
     
         7 . The catalyst for diene polymerization of  claim 6 , wherein the halogen compound is selected from the group consisting of an aluminum halogen compound, an inorganic halogen compound obtained by substituting aluminum in the aluminum halogen compound with the element selected from the group consisting of boron, silicon, tin and titanium, and an organic halogen compound. 
     
     
         8 . The catalyst for diene polymerization of  claim 7 , wherein the organic halogen compound is a t-alkyl halogen compound. 
     
     
         9 . The catalyst for diene polymerization of  claim 6 , wherein the organometal compound is at least one selected from the group consisting of an alkyl aluminum compound, an alkyl magnesium compound and an alkyl lithium compound. 
     
     
         10 . The catalyst for diene polymerization of  claim 9 , wherein the organometal compound is at least one selected from the group consisting of trimethyl aluminum, triethyl aluminum, tripropyl aluminum, tributyl aluminum, triisobutyl aluminum, trihexyl aluminum, diisobutyl aluminum hydride, dibutyl magnesium, diethyl magnesium and n-butyl lithium. 
     
     
         11 . The catalyst for diene polymerization of  claim 6 , wherein a mixing ratio (molar ratio) of neodymium compound:halogen compound:organometal compound is 1.0:1.0 to 20:5.0 to 200.