a new epoxy resin according to example 11 is shown in the following reaction formula 9 1h nmr 400 mhz cdcl3 u03b4 8 10 d j 10 0 hz 1h 7 74 d j 7 2 hz 4h 7 34 7 30 m 11h 7 25 7 23 m 2h 7 11 7 09 m 11h 6 77 q j 8 8 hz 8h 6 70 dd j 5 8 2 6 hz 1h 4 49 4 39 m 2h 4 29 4 12 m 10h 3 92 3 88 m 2h 3 30 s 1h 2 88 2 86 m 2h 2 71 2 70 m 2h 2 59 2 56 m 2h synthesis of naphthalene cardo naphthalene trimer epoxy resin having specific side functional group 5 g of the trimer synthesized in example 10 was put into 60 ml of methylene chloride in a 250 ml flask at room temperature and the resulting solution was stirred 3 ml of triethyl amine and 1 8 ml of acryloyl chloride were slowly added to the solution at 0 u00b0 c and the resulting mixture was left to react at 0 u00b0 c for 2 hours after the reaction was completed the mixture was quenched with saturated nahco3 and the organic layer was.