TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The composition further contains 0.1-20 parts weight of inorganic oxide e.g. silica with respect to 100 parts weight of the compound (A-C).    TECHNOLOGY FOCUS - POLYMERS - Preferred Compound: An acrylic type monomer (a1) having piperidinyl group and (meth)acryloyl group, acrylic type monomer (a2) having silicon containing functional group and (meth)acryloyl group, acrylic type monomer (a3) having hydroxyl group and (meth)acryloyl group, and another acrylic type monomer (a4) having (meth)acryloyl group and hydroxyl group is copolymerized to obtain an acrylic type prepolymer. The prepolymer is reacted with acrylic type monomer (a5) having isocyanate group and (meth)acryloyl group to obtain the compound (A). The compound (A) has number average molecular weight of 3000-100000. The silicon atom containing functional group is polysiloxane group. The (meth)acryloyl group equivalent of the compound (A) is 250-1600. The content of the monomers (a1-a4) is 10-80 wt.%, 0.1-20 wt.%, 10-80 wt.% and 0-10 wt.%, respectively. The compound (C) contains ultraviolet curable compound (C1) having pentaethylene group and (meth)acryloyl group derived from caprolactone, and is of formula (I). The compound (C) further contains compound (C2) which does not have pentaethylene group derived from caprolactone. The compound (C2) is urethane type compound having 2-15 (meth)acryloyl groups and number average molecular weight of 500-10000.R1=H or methyl;andl+m+n+o+p+q=1-12.The composition contains 1-50 wt.% of compound (A), 1-20 wt.% of compound (B) and 30-95 wt.% of compound (C) with respect to 100 wt.% of the components, or 1-50 wt.% of compound (A), 1-20 wt.% of compound (B), 5-60 wt.% of compound (C1) and 20-80 wt.% of compound (C2). EXAMPLE - (In parts weight) Silaplaine FM-0711 (RTM: fragment-end modified reactive silicone) (25), LA-87 (RTM: 3-(2,2,6,6-tetramethyl-4-piperidinyl)-2-methyl-1-propene-3-one) (100), 4-hydroxybutylacrylate (125), azobisisobutyronitrile (7.5) and cyclohexanone (80.9) were reacted to obtain a prepolymer with hydroxyl value of 183 mg potassium hydroxide/g. Hydroquinone monomethyl ether (0.5), cyclohexanone solution of the prepolymer (137.6), dibutyl tin dilaurate (0.17) and cyclohexanone (39.6) were stirred at 60 degrees C for 1 hour to obtain active energy ray curable compound with number average molecular weight of 13000, piperidinyl group with equivalent of 842 and (meth)acryloyl group equivalent of 430. The active energy ray curable compound (10), RUVA 93 (RTM: 2-(2'-hydroxy-5'-methacryloyloxy ethyl phenyl)-2H-benzotriazole) (10), UA1100H (RTM: urethane oligomer with number average molecular weight of 764 and functional group number of 6) (40), PGM-ST (RTM: colloidal silica) (7.5) and Irgacure 184 (RTM: 1-hydroxycyclohexylphenyl ketone) (3) were mixed to obtain active energy ray curable composition. The hardened material formed using the composition had excellent wear resistance, weather resistance and adhesiveness with respect to substrate.