Method of manufacturing hard coat film

Abstract

An aspect of the present invention relates to method of manufacturing a hard coat film, wherein the hard coat film comprises a plastic substrate and a hard coat layer, the method comprises forming the hard coat layer by subjecting a photopolymerizable hard coating composition to photopolymerization processing, and the photopolymerizable hard coating composition comprises a radical polymerizable compound having two or more radical polymerizable groups selected from the group consisting of acryloyloxy groups, acryloyl groups, methacryloyloxy groups, and methacryloyl groups per molecule, a cationic polymerizable compound, a radical photopolymerization initiator, and a cationic photopolymerization initiator.

What is claimed is: 
     
         1 . A method of manufacturing a hard coat film, wherein
 the hard coat film comprises a plastic substrate and a hard coat layer,   the method comprises forming the hard coat layer by subjecting a photopolymerizable hard coating composition to photopolymerization processing, and   the photopolymerizable hard coating composition comprises:   a radical polymerizable compound having two or more radical polymerizable groups selected from the group consisting of acryloyloxy groups, acryloyl groups, methacryloyloxy groups, and methacryloyl groups per molecule;   a cationic polymerizable compound;   a radical photopolymerization initiator; and   a cationic photopolymerization initiator.   
     
     
         2 . The method of manufacturing a hard coat film according to  claim 1 , wherein the radical polymerizable compound is a urethane bond-containing compound containing one or more urethane bonds per molecule. 
     
     
         3 . The method of manufacturing a hard coat film according to  claim 2 , wherein the urethane bond-containing compound contains two or more urethane bonds per molecule. 
     
     
         4 . The method of manufacturing a hard coat film according to  claim 1 , wherein the radical polymerizable compound is a urethane bond-containing compound containing one or more urethane bonds per molecule. 
     
     
         5 . The method of manufacturing a hard coat film according to  claim 4 , wherein the cyclic structure-containing compound contains at least one cyclic structure selected from the group consisting of nitrogen-containing hetero rings, oxygen-containing hetero rings, and alicyclic structures. 
     
     
         6 . The method of manufacturing a hard coat film according to  claim 4 , wherein the cyclic structure-containing compound contains a nitrogen-containing hetero ring-containing compound. 
     
     
         7 . The method of manufacturing a hard coat film according to  claim 6 , wherein the nitrogen-containing hetero ring-containing compound contains one or more nitrogen-containing hetero ring selected from the group consisting of isocyanurate rings and glycoluril rings per molecule. 
     
     
         8 . The method of manufacturing a hard coat film according to  claim 6 , wherein the nitrogen-containing hetero ring-containing compound contains an isocyanurate ring-containing compound. 
     
     
         9 . The method of manufacturing a hard coat film according to  claim 2 , wherein the nitrogen-containing hetero ring-containing compound contains an isocyanurate ring-containing compound. 
     
     
         10 . The method of manufacturing a hard coat film according to  claim 1 , wherein the cationic polymerizable compound contains one or more cationic polymerizable groups selected from the group consisting of oxygen-containing hetero ring groups and vinyl ether groups. 
     
     
         11 . The method of manufacturing a hard coat film according to  claim 10 , wherein the oxygen-containing hetero ring contained in the oxygen-containing hetero ring group is selected from the group consisting of:
 a single ring selected from the group consisting of epoxy rings, tetrahydrofuran rings, and oxetane rings;   a fused ring containing one or more of these single rings; or   an oxybicyclo ring.   
     
     
         12 . The method of manufacturing a hard coat film according to  claim 1 , wherein the cationic polymerizable compound contains a cationic polymerizable compound having a cationic polymerizable group equivalence of less than 150 obtained by dividing the molecular weight by the number of cationic polymerizable groups contained per molecule. 
     
     
         13 . The method of manufacturing a hard coat film according to  claim 12 , wherein the cationic polymerizable compound with a cationic polymerizable group equivalence of less than 150 is an epoxy ring-containing compound in which the epoxy equivalence obtained by dividing the molecular weight by the number of epoxy rings contained per molecule is less than 150. 
     
     
         14 . The method of manufacturing a hard coat film according to  claim 1 , wherein the cationic polymerizable compound contains an oxetane ring-containing compound comprising one or more oxetane rings per molecule. 
     
     
         15 . The method of manufacturing a hard coat film according to  claim 1 , wherein the cationic polymerizable compound contains one or more functional groups having an ethylenic unsaturated double bond per molecule. 
     
     
         16 . The method of manufacturing a hard coat film according to  claim 1 , wherein the molecular weight of the cationic polymerizable compound is 500 or less. 
     
     
         17 . The method of manufacturing a hard coat film according to  claim 1 , wherein the molecular weight of the cationic polymerizable compound is 300 or less. 
     
     
         18 . The method of manufacturing a hard coat film according to  claim 1 , wherein the photopolymerizable hard coating composition contains 0.05 to 50 weight parts of the cationic polymerizable compound per 100 weight parts of the combined contents of the cationic polymerizable compounds and the radical polymerizable compounds. 
     
     
         19 . The method of manufacturing a hard coat film according to  claim 1 , wherein the plastic substrate contains at least one film selected from the group consisting of acrylic resin films and polycarbonate resin films. 
     
     
         20 . The method of manufacturing a hard coat film according to  claim 1 , wherein the plastic substrate is a laminate film of two or more layers of resin film.