Ultraviolet radiation curable coating composition

A radiation curable resin composition which comprises (I) a photopolymerization initiator and (II) a radiation curable resin obtained by reaction of (A) an alkoxymethylated melamine selected from the group consisting of methoxymethylmelamines, ethoxymethylmelamines, butoxymethylmelamines, compounds in which different kinds of methoxymethyl, ethoxymethyl or butoxymethyl groups are held on the same melamine nucleus and polymers thereof, (B) an .alpha.,.beta.-ethylenically unsaturated compound having at least one hydroxyl group selected from the group consisting of esters of alpha, beta-ethylenically unsaturated carboxylic acids with polyhydric alcohols, and reaction products obtained by reaction of epoxy compounds with hydroxyl group-containing (meth) acrylates, (meth) acrylic acids or itaconic acid and (C) at least one member selected from the group consisting of (1) polyols selected from the group consisting of ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol, tripropylene glycol, tetrapropylene glycol, polypropylene glycols, 1,3-propanediol, 1,4-butanediol, 1,3-butanediol, 1,5-pentanediol, neopentyl glycol, 1,6-hexanediol, 1,8-octanediol, glycerin, trimethylolethane, trimethylolpropane, pentaerythritol, sorbitol and the etherification-condensed compounds of said polyols, bisphenols, hydrogenated bisphenols, halogenated bisphenols and resorcinol, (2) polyether polyols obtained by reaction of above-defined polyols with alkylene oxides, and (3) higher fatty acid esters having at least one hydroxyl group.