62 3 74c6 1 31 29 3 28 0 3 92 5 83 8 73c7 1 31 22 6 21 3 4 34 8 43 20 36______________________________________ the data in table 7 indicate a similar or more rapid cure when using onium cure accelerators of the present invention relative to the comparative examples table 8______________________________________press cured sheet mechanical property data stress at elongation tensile 100 elong at break strengthexample mpa mpa ______________________________________14 4 1 290 10 215 3 6 309 8 616 3 7 287 8 317 3 6 224 8 418 4 1 254 8 5c5 3 2 341 8 6c6 3 9 315 9 4c7 2 7 536 7 3______________________________________ the results in table 8 show that the curable compositions of this invention provide cured articles with acceptable initial cure properties table 9______________________________________post cure sheet mechanical property data stress at elongation tensile 100 elong at break strengthexample mpa mpa ______________________________________14 5 5 219 13 715 4 8 290 13 016 5 2 253 12 617 5 2 213 13 118 6 1 192 13 9c5 3 8 254 11 1c6 5 7 246 13 9c7 3 8 422 10 2______________________________________ the results in table 9 show the curable compositions of this invention provide cured articles with acceptable post cure properties compression set data were obtained using astm method d 395 89 o rings were press cured for 12 min at 177 u00b0 c and post cured for 16 hrs at 232 u00b0 c o rings were compressed 25 for 70 hrs at 200 u00b0 c data shown in table 10 are reported as percent of the compression remaining after the tests table 10______________________________________example comp.