| abstract |
Useful composites based on cationic initiators, cationically polymerizable resins and radiation blocking fillers are produced. In order to make a polymerizable composition radiopaque, a) a cationically active functional group, (b) an initiation system capable of initiating cationic polymerization of the cationically active functional group, and (c) a polymerizable composition A sufficient amount of metal oxide, metal halide, metal borate, metal phosphate, metal silicate, metal carbonate, metal germanate, metal tetrafluoroborate, metal hexafluorophosphate and combinations thereof A polymerizable composition comprising a filler composition comprising a radiation blocking filler selected from the group, wherein the polymerizable composition is polymerized and measured using a GYZJ-935 hardness meter, 25 ° C. Components (a), (b) and (c) are selected to produce a polymerized composition having a Barcol hardness of at least 10 within 30 minutes of initiation of the cationically active functional group at the reaction temperature of That the polymerizable composition. [Selection figure] None |