Alkali soluble, photo-curable and thermo-curable copolymer, and photosensitive resin composition, photosensitive resin film and color filter using the same

An alkali soluble, photo-curable and thermo-curable copolymer comprising:

• a first (meth)acrylate repeating unit having a branched chain in which an organic functional group including an epoxy group is bonded to a terminal of the branched chain;
• a second (meth)acrylate repeating unit having a branched chain in which an organic functional group including an alkenyl group is bonded to a terminal of the branched chain;
• and
• a third (meth)acrylate repeating unit having a branched chain in which an organic functional group including an alkenyl group is bonded to a terminal of the branched chain,
• wherein in the second (meth)acrylate repeating unit, the branched chain includes any one functional group selected from an alkyl ester group having 1 to 20 carbon atoms substituted with a hydroxy group;
• an oxyalkyl ester group having 1 to 20 carbon atoms substituted with a hydroxy group;
• an alkyl ester group substituted by a cycloalkyl group having 3 to 30 carbon atoms substituted with a hydroxy group;
• a polycyclic alkyl ester group having 7 to 30 carbon atoms substituted with a hydroxy group;
• and an alkyl ester group substituted by a polycyclic alkyloxy group having 7 to 30 carbon atoms substituted with a hydroxy group, and
• wherein in the third (meth)acrylate repeating unit, the branched chain includes any one functional group selected from an alkyl ester group having 1 to 20 carbon atoms in which a substituent containing a carboxyl group is introduced to the terminal;
• an oxyalkyl ester group having 1 to 20 carbon atoms in which a substituent containing a carboxyl group is introduced to the terminal;
• an alkyl ester group substituted by a cycloalkyl group having 3 to 30 carbon atoms in which a substituent containing a carboxyl group is introduced to the terminal;
• a polycyclic alkyl ester group having 7 to 30 carbon atoms in which a substituent containing a carboxyl group is introduced to the terminal;
• and an alkyl ester group substituted by a polycyclic alkyloxy group having 7 to 30 carbon atoms in which a substituent containing a carboxyl group is introduced to the terminal.