Catalyst for Conjugated Diene Polymerization, Conjugated Diene Polymer and Modified Conjugated Diene Polymer Produced Using the Same, Production Methods Thereof, Rubber Composition for Tire, and Rubber Composition for Rubber Belt

Abstract

Provided are a catalyst for a conjugated diene polymerization capable of producing a conjugated diene polymer having a high content of cis-1,4-structures with a high activity, a conjugated diene polymer and a modified conjugated diene polymer using the same, production methods thereof, a rubber composition for a tire, and a rubber composition for a rubber belt. Described are a catalyst for a conjugated diene polymerization including: a non-metallocene type gadolinium compound (A) represented by the general formula (1); an ionic compound (B) formed of a non-coordinating anion and a cation; and an organic metal compound (C) of an element selected from the group consisting of a group 2, a group 12, and a group 13 of the periodic table, a conjugated diene polymer and a modified conjugated diene polymer obtained using the same, production methods thereof, a rubber composition for a tire, and a rubber composition for a rubber belt.

1 .- 37 . (canceled) 
     
     
         38 . A catalyst for a conjugated diene polymerization comprising: a non-metallocene type gadolinium compound (A) represented by the following general formula (1); an ionic compound (B) including a non-coordinating anion and a cation; and an organic metal compound (C) of an element selected from the group consisting of a group 2, a group 12, and a group 13 of the periodic table, 
       
         
           
           
               
               
           
         
         wherein R 1 , R 2 , and R 3  each shows a hydrogen or a substituent having 1 to 12 carbon atoms, O shows an oxygen atom, and Gd shows a gadolinium atom. 
       
     
     
         39 . A conjugated diene polymer obtained by polymerizing a conjugated diene compound using the catalyst for a conjugated diene polymerization according to claim  1 . 
     
     
         40 . A conjugated diene polymer composition comprising:
 a conjugated diene polymer (α) resulting from a polymerization of a conjugated diene compound using a catalyst for a conjugated diene polymerization including a non-metallocene type gadolinium compound (A) represented by the following general formula (1), an ionic compound (B) formed of a non-coordinating anion and a cation, and an organic metal compound (C) of an element selected from the group consisting of a group 2, a group 12, and a group 13 of the periodic table;   a diene polymer (β) other than the (α); and   a rubber-reinforcing agent (γ),   
       
         
           
           
               
               
           
         
         wherein R 1 , R 2 , and R 3  each shows a hydrogen or a substituent having 1 to 12 carbon atoms, O shows an oxygen atom, and Gd shows a gadolinium atom. 
       
     
     
         41 . The conjugated diene polymer composition according to claim  3 , wherein the rubber-reinforcing agent (γ) is a carbon black. 
     
     
         42 . The conjugated diene polymer composition according to claim  3 , wherein the molecular weight of the conjugated diene compound is adjusted with a compound selected from the group consisting of (1) a hydrogen, (2) a metal hydride compound, (3) a hydrogenated organic metal compound. 
     
     
         43 . The conjugated diene polymer composition according to claim  3 , wherein the conjugated diene compound is a 1,3-butadiene. 
     
     
         44 . The conjugated diene polymer composition according to claim  3 , which is a rubber composition for a tire, wherein the rubber-reinforcing agent (γ) is included in an amount of 30 to 80 parts by mass based on 100 parts by mass of the rubber components (α)+(β). 
     
     
         45 . The conjugated diene polymer composition according to claim  7 , wherein the diene polymer (β) is a natural rubber and/or a polyisoprene. 
     
     
         46 . The conjugated diene polymer composition according to claim  7 , wherein the rubber-reinforcing agent (γ) is a carbon black. 
     
     
         47 . The conjugated diene polymer composition according to claim  3 , which is a rubber composition for a rubber belt, wherein the rubber-reinforcing agent (γ) is included in an amount of 20 to 70 parts by mass based on 100 parts by mass of the rubber components (α)+(β). 
     
     
         48 . The conjugated diene polymer composition according to claim  10 , wherein the rubber-reinforcing agent (γ) is a carbon black and/or silica. 
     
     
         49 . A modified conjugated diene polymer obtained by polymerizing a conjugated diene compound using a catalyst for a conjugated diene polymerization including a non-metallocene type gadolinium compound (A) represented by the following general formula (1), a ionic compound (B) formed of a non-coordinating anion and a cation, and an organic metal compound (C) of an element selected from the group consisting of a group 2, a group 12, and a group 13 of the periodic table, and then modifying the resulting polymer with a modifier, 
       
         
           
           
               
               
           
         
         wherein R 1 , R 2 , and R 3  each shows a hydrogen or a substituent having 1 to 12 carbon atoms, O shows an oxygen atom, and Gd shows a gadolinium atom. 
       
     
     
         50 . The modified conjugated diene polymer according to claim  12 , wherein the modifier is one member selected from the group consisting of an amino group-containing carbonyl compound, a halogenated benzyl compound, and an aldehyde compound. 
     
     
         51 . A modified conjugated diene polymer composition comprising:
 a modified conjugated diene polymer (α′) according to claim  12 ;   a diene polymer (β) other than the (α′); and a rubber-reinforcing agent (γ),   
       
         
           
           
               
               
           
         
         wherein R 1 , R 2 , and R 3  each shows a hydrogen or a substituent having 1 to 12 carbon atoms, O shows an oxygen atom, and Gd shows a gadolinium atom. 
       
     
     
         52 . The modified conjugated diene polymer composition according to claim  14  wherein the molecular weight of the conjugated diene compound is adjusted with a compound selected from the group consisting of (1) a hydrogen, (2) a metal hydride compound, and (3) a hydrogenated organic metal compound. 
     
     
         53 . The modified conjugated diene polymer composition according to claim  14  wherein the conjugated diene compound is a 1,3-butadiene. 
     
     
         54 . The modified conjugated diene polymer composition according to claim  14 , which is a rubber composition for a tire, wherein the rubber-reinforcing agent (γ) is included in an amount of 30 to 80 parts by mass based on 100 parts by mass of the rubber components (α′)+(β). 
     
     
         55 . The modified conjugated diene polymer composition according to claim  17 , wherein the diene polymer (β) is a natural rubber and/or a polyisoprene. 
     
     
         56 . The modified conjugated diene polymer composition according to claim  14 , which is a rubber composition for a rubber belt, wherein the rubber-reinforcing agent (γ) is included in an amount of 20 to 70 parts by mass based on 100 parts by mass of the rubber components (α′)+(β). 
     
     
         57 . The modified conjugated diene polymer composition according to claim  19 , wherein the rubber-reinforcing agent (γ) is a carbon black and/or silica.