Conjugated Diene-Based Polymer, Method for Producing the Same, and Composition Including the Same

Abstract

The present invention provides a conjugated diene-based polymer containing at least one conjugated diene monomer, wherein 40% or more of the end thereof has an amino group and an amide group, and the indicator b* value of yellowness, as measured with a colorimetric color difference meter, is 15 or less.

1 - 6 . (canceled) 
     
     
         7 . A conjugated diene-based polymer comprising at least one conjugated diene monomer, wherein 40% or more of an end thereof is an end having an amino group and an amide group, and an indicator b* value of yellowness, as measured with a colorimetric color difference meter, is 15 or less,
 wherein the end having the amino group and the amide group comprises an end having a structure represented by the following formula (I):   
       
         
           
           
               
               
           
         
         wherein P represents a conjugated diene-based polymer comprising at least one conjugated diene monomer, and R 1  and R 2  each independently represent a hydrocarbon group having 1 to 20 carbon atoms. 
       
     
     
         8 . The conjugated diene-based polymer according to  claim 7 , wherein the end having the amino group and the amide group comprises an end having a structure represented by the following formula (I) and an end having a structure represented by the following formula (IV), and the indicator b* value of yellowness, as measured with a colorimetric color difference meter, is 15 or less: 
       
         
           
           
               
               
           
         
         wherein P represents a conjugated diene-based polymer comprising at least one conjugated diene monomer, and R 1  and R 2  each independently represent a hydrocarbon group having 1 to 20 carbon atoms; and 
       
       
         
           
           
               
               
           
         
         wherein P represents a conjugated diene-based polymer comprising at least one conjugated diene monomer, and R 1  and R2 each independently represent a hydrocarbon group having 1 to 20 carbon atoms. 
       
     
     
         9 . The conjugated diene-based polymer according to  claim 7 , wherein the b* value is 9 or less. 
     
     
         10 . A polymer composition comprising:
 (a) 1 to 99 parts by weight of the conjugated diene-based polymer according to  claim 7 , and   (b) 99 to 1 part by weight of a thermoplastic polymer and/or a rubber polymer.