Novel cyanate ester compound, flame-retardant resin composition, and cured product thereof

Abstract

A cyanate ester compound represented by the formula (1), wherein Ar 2 represents a phenylene group, a naphthylene group or a biphenylene group, Ar 1 represents a naphthylene group or a biphenylene group when Ar 2 is a phenylene group, or Ar 1 represents a phenylene group, a naphthylene group or a biphenylene group when Ar 2 is a naphthylene group or a biphenylene group, R x represents all substituents of Ar 1 each R x is the same or different and represents hydrogen, an alkyl group or an aryl group, R y represents all substituents of Ar 2 , each R y is the same or different and represents hydrogen, an alkyl group or an aryl group, and n is an integer of 1 to 50.

1 . A cyanate ester compound represented by the formula (1),  
       
         
           
           
               
               
           
         
         wherein  
         Ar 2  represents a phenylene group, a naphthylene group or a biphenylene group,  
         Ar 1  represents a naphthylene group or a biphenylene group when Ar 2  is a phenylene group, or Ar 1  represents a phenylene group, a naphthylene group or a biphenylene group when Ar 2  is a naphthylene group or a biphenylene group,  
         R x  represents all substituents of Ar 1 , each R x  is the same or different and represents hydrogen, an alkyl group or an aryl group,  
         R y  represents all substituents of Ar 2 , each R y  is the same or different and represents hydrogen, an alkyl group or an aryl group, and  
         n is an integer of 1 to 50.  
       
     
     
         2 . A cyanate ester compound according to  claim 1 , wherein the compound of the formula (1) is a compound of the formula (2),  
       
         
           
           
               
               
           
         
         wherein R 1  to R 4  are the same or different and represent hydrogen or an alkyl group, n is an integer of 1 to 50, and the position of each substituent of aromatic rings can be arbitrarily selected.  
       
     
     
         3 . A cyanate ester compound according to  claim 1 , wherein the compound of the formula (1) is a compound of the formula (3),  
       
         
           
           
               
               
           
         
         wherein R 1  to R 4  are the same or different and represent hydrogen or an alkyl group, n is an integer of 1 to 50, and the position of each substituent of aromatic rings can be arbitrarily selected.  
       
     
     
         4 . A cyanate ester compound according to  claim 1 , wherein the compound of the formula (1) is a compound of the formula (4),  
       
         
           
           
               
               
           
         
         wherein R 1  and R 2  are the same or different and represent hydrogen or an alkyl group, n is an integer of 1 to 50, and the position of each substituent of aromatic rings can be arbitrarily selected.  
       
     
     
         5 . A cyanate ester compound according to  claim 2 , wherein the compound of the formula (2) is a compound of the formula (5),  
       
         
           
           
               
               
           
         
         wherein n is an integer of 1 to 50.  
       
     
     
         6 . A cyanate ester compound according to  claim 3 , wherein the compound of the formula (3) is a compound of the formula (6).  
       
         
           
           
               
               
           
         
       
     
     
         7 . A cyanate ester compound according to  claim 4 , wherein the compound of the formula (4) is a compound of the formula (7),  
       
         
           
           
               
               
           
         
         wherein n is an integer of 1 to 50.  
       
     
     
         8 . A thermosetting resin composition containing the cyanate ester compound recited in  claim 1  and a curing agent.  
     
     
         9 . A cured product obtained by curing the thermosetting resin composition recited in  claim 8.