Method for producing biphenyl-skeleton-containing epoxy resin

Abstract

Disclosed is a method for producing a biphenyl-skeleton-containing epoxy resin represented by Formula (1) described below including a step of allowing polyvalent hydroxy biphenyl obtained by a production step including a regioselective cross-coupling reaction to react with epihalohydrin. (In the formula, k1 and l1 each represent an integer of 0 to 4, m and n each represent an integer of 1 to 5, R 1 and R 2 each independently represent a hydrocarbon group having 1 to 10 carbon atoms which may have a substituent group, and R 1 and R 2 may be identical to each other or different from each other. (Provided that left and right phenyl structures of a biphenyl skeleton are different from each other.)

1 - 2 . (canceled) 
     
     
         3 . A biphenyl-skeleton-containing epoxy resin represented by Formula (1): 
       
         
           
           
               
               
           
         
         in the formula, k1 and l1 each represent an integer of 0 to 4, m and n each represent an integer of 1 to 5, R 1  and R 2  each independently represent a hydrocarbon group having 1 to 10 carbon atoms which may have a substituent group, and R 1  and R 2  may be identical to each other or different from each other, provided that left and right phenyl structures of a biphenyl skeleton are different from each other. 
       
     
     
         4 . The biphenyl-skeleton-containing epoxy resin according to  claim 3 , wherein the biphenyl-skeleton-containing epoxy resin is a 2,4,4′-trihydroxy biphenyl type epoxy resin represented by Formula (4): 
       
         
           
           
               
               
           
         
         in the formula, k1 represents an integer of 0 to 4, l1 represents an integer of 0 to 3, R 1  and R 2  each independently represent a hydrocarbon group having 1 to 10 carbon atoms which may have a substituent group, and R 1  and R 2  may be identical to each other or different from each other. 
       
     
     
         5 . The biphenyl-skeleton-containing epoxy resin according to  claim 3 , wherein the biphenyl-skeleton-containing epoxy resin is a 3,4′,5-trihydroxy biphenyl type epoxy resin represented by Formula (5): 
       
         
           
           
               
               
           
         
         in the formula, k1 represents an integer of 0 to 4, l1 represents an integer of 0 to 3, R 1  and R 2  each independently represent a hydrocarbon group having 1 to 10 carbon atoms which may have a substituent group, and R 1  and R 2  may be identical to each other or different from each other.