150 u00b0 c until homogeneous then cooled to 80 u00b0 c and the following amounts of catalyst as indicated was added the homogeneous resin was then stored at 52 u00b0 c and the viscosity measured at 100 u00b0 c was measured periodically the results are given in table vi table vi______________________________________resin viscosity cat sul example cat a fanil melt viscosityor a lyst amide after 12 dayscomp lyst milli milli 1036800 s expt type equiv equiv cps pa u00b7 s ______________________________________17 2 1 0 125 450 0 45 18 5 1 0 125 220 0 22 p none 0 125 590 0 59 ______________________________________ not an example of the present invention to 45 3 grams 0 25 equiv of d e r u2122 383 epoxy resin as described above 34 grams 0 125 equiv of tetrabromobisphenol a and 5 37 grams 0 125 equiv of sulfanilamide were added 1 milliequiv of the indicated catalyst a small amount of the resin mixture was then analyzed by a dupont model 1090 differential scanning calorimeter dsc at a rate of 2 u00b0 c per minute 0 033 u00b0 c s the temperature at which an exothermic reaction was indicated via baseline drift the actual onset of a major exotherm and the exotherm peak were noted the results are given in table vii table vii______________________________________dsc dataexam cat onset of peakple or a beginning major exo comp lyst of exotherm exotherm thermexpt type u00b0 c u00b0 c u00b0 c ______________________________________19 2 80 85 145 192q b 65.