Phosphorus- and nitrogen-containing resin hardener and a flame retarding resin composition containing said hardener

Abstract

The present invention discloses a phosphorus- and nitrogen-containing resin hardener, which has a structure represented by the following formula: wherein R 2 represents a hydrogen atom or a group represented by the following formula: wherein n is an integer of from 0 to 20, and R represents phenylene, naphthylene or a group represented by the following formula: wherein A represents —O—, —S—, SO 2 —, —CO—, —CH 2 —, —(CH 3 ) 2 — or a group represented by the following formula:  provided tat at least one R 2 is not a hydrogen atom; and R 1 represents NHR 2 , C 1-6 alkyl or phenyl; in the above groups represented by R and A, the aromatic group can be substituted by one or more substituents selected from the group consisting of hydroxy, amino, carboxy and C 1-6 alkyl. The present invention also discloses a flame retarding resin composition containing said hardener.

What is claimed is:  
     
         1 . A phosphorus- and nitrogen-containing resin hardener, which has a structure represented by the following formula:  
       
         
           
           
               
               
           
         
       
       wherein R 2  represents a hydrogen atom or a group represented by the following formula:  
       
         
           
           
               
               
           
         
         wherein n is an integer of from 0 to 20, and  
         R represents phenylene, naphthylene or a group represented by the following formula:  
         
           
             
             
                 
                 
             
           
           wherein A represents —O—, —S—, —SO 2 —, —CO—, —CH 2 —, —C(CH 3 ) 2 — or a group represented by the following formula:  
           
             
               
               
                   
                   
               
             
           
         
         provided that at least one R 2  is not a hydrogen atom; and  
         R 1  represents NHR 2 , C 1-6 alkyl or phenyl;  
         in the above groups represented by R and A, the aromatic group can be substituted by one or more substituents selected from the group consisting of hydroxy, amino, carboxy and C 1-6 alkyl.  
       
     
     
         2 . The phosphorus- and nitrogen-containing resin hardener according to  claim 1 , which are compounds of the following formula:  
       
         
           
           
               
               
           
         
       
       wherein b is an integer of from 0 to 20.  
     
     
         3 . A flame retarding resin composition, which comprises (A) an epoxy resin, (B) the phosphorus- and nitrogen-containing resin hardener according to  claim 1  or  2 , and (C) a hardening promoter.  
     
     
         4 . The flame retarding resin composition according to  claim 3 , wherein said epoxy resin is selected from the group consisting of glycidyl ethers of bisphenols, glycidyl ethers of biphenols, glycidyl ethers of dihydroxybenzenes, glycidyl ethers of nitrogen-containing hetero rings, glycidyl ethers of dihydroxynaphthalene, polyglycidyl ethers of phenolics and polyglycidyl ethers of polyhydric phenols.  
     
     
         5 . The flame retarding resin composition according to  claim 3 , wherein said hardening promoter is selected from the group consisting of tertiary amines, tertiary phosphines, quaternary ammonium salts, quaternary phosphonium salts, boric trifluoride complexs, lithium compounds and imidazole compounds.  
     
     
         6 . The flame retarding resin composition according to  claim 3 , wherein the amount of the component (B) hardeners is 20 to 140% of the equivalent weight of the reactive hydrogen in said hardeners, when the epoxy equivalent weight of the component (A) epoxy resin is taken as 100%.  
     
     
         7 . The flame retarding resin composition according to  claim 3 , wherein the amount of the component (C) hardening promoters is from 50 to 50,000 ppm, based on the total weight of said flame retarding resin composition.  
     
     
         8 . The flame retarding resin composition according to  claim 3 , which further comprises other hardeners selected from the group consisting of amines, bisphenolic resin, dihydroxybenzenes, polyhydric phenolic resin and phenolics.  
     
     
         9 . The flame retarding resin composition according to  claim 3 , which is useful in making prepregs, composites, laminates, printed circuit boards, substrates for build-ups of resin coated copper and epoxy molding compounds.