resin composed of 2 0 moles epon 828 epoxy resin a product of shell chemical corp 1 0 moles bisphenol a and 2 0 moles methacrylic acid sartomer cd480 is ethoxylated bisphenol a dimethacrylate where m and n in the above formula total 10 sartomer 348 is ethoxylated bisphenol a dimethacrylate where m and n in the above formula are both 1 mod l is 25 hydroquinone and 75 propylene glycol from the data in table i it can be seen that formulation n a composition of this invention has better than acceptable resin properties and clear casting properties and has volatile emissions far less than any of the others which are based on a vinyl ester resin not of this invention table i______________________________________ e t u v n______________________________________resinmr 14059 60 00 30 00 35 00 30 00 ve4221 30 00sartomer cd480 20 00 15 00 10 00 30 00sartomer 348 20 00 20 00 25 00 eg dimethacrylate 20 00 20 00 20 00 25 00 vinyl toluene 20 00 10 00 10 00 10 00 cyclohexyl 40 00methacrylatemod l 0 10 0 15 0 20 0 15 0 10resin propertiesgel time min sec 4 29 10 56 11 38 12 18 22 45interval min sec 2 36 2 52 3 38 3 22 6 30exotherm peak u00b0 f 309 285 284 302 262viscosity cps 75 u00b0 f 6 780 396 990 538 1661162 emissions g m2 16 4 12 1 13 9 9 7 3.