Ex parte KAZUYA ONO et al. - Page 3

             Appeal No. 95-0442                                                                                   
             Application 08/026,183                                                                               

             is suitable for impregnating rotor coil windings.  The                                               
             composition consists essentially of 1) 100 parts by weight of a                                      
             mixed epoxy resin which has an epoxy equivalent of 800-2000 and                                      
             includes a) a diglycidyl ether of bisphenol A having an epoxy                                        
             equivalent of 180-2500, and b) a rubber-modified epoxy resin                                         
             which has an epoxy equivalent of 180-2500 and is obtained by                                         
             reacting a diglycidyl ether of bisphenol A with a carboxyl-                                          
             terminated acrylonitrile-butadiene copolymer, this copolymer                                         
             being 1-4 wt% of the mixed epoxy resin, 2) a mixed curing agent                                      
             consisting of specified amounts of an imidazole compound,                                            
             dicyanodiamide and a dihydrazide of a dibasic carboxylic acid,                                       
             and 3) 50-100 parts by weight of silica.                                                             
                    Yamamoto discloses a coating composition which is especially                                  
             suitable for coating fuel tanks (col. 1, lines 5-9), but can be                                      
             used to form coatings for various articles in various fields                                         
             (col. 5, lines 20-22).  The composition comprises a rubber-                                          
             modified epoxy resin, a phenoxy resin, a metal powder, a curing                                      
             agent and an organic solvent (col. 1, lines 49-55).  The rubber-                                     
             modified epoxy resin is made by reacting an epoxy resin with a                                       
             carboxyl group-containing butadiene-acrylonitrile rubber, wherein                                    
             the epoxy resin can be a bisphenol A type epoxy resin (col. 2,                                       
             lines 29-32) and generally has an epoxy equivalent of about 100                                      


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Last modified: November 3, 2007