Photosensitive resin composition
The present invention relates to a photosensitive resin composition, particularly to a photosensitive resin composition for forming an interlayer organic insulating film for TFT-LCD, comprising 0.01 to 20 wt % of UV stabilizer or radical scavenger. The photosensitive resin composition of the present invention can be used for forming an interlayer organic insulating film for TFT-LCD to improve active unfilled area upon over exposure in liquid crystal photo-alignment process, can easily control resolution of pattern, and is particularly suitable for forming a planarization layer of an interlayer organic insulating film.
1. A photosensitive resin composition for an interlayer organic insulating film for TFT-LCD, comprising a) 5 to 40 wt % of copolymer resin; b) 0.01 to 30 wt % of a photoinitiator; c) 0.5 to 40 wt % of multifunctional monomers having an ethylenic unsaturated bond; d) 1-10 wt % each of a UV stabilizer and a radical scavenger; and e) the remaining content of a solvent, wherein the UV stabilizer and the radical scavenger are selected from the group consisting of triazine and derivatives thereof, piperidine and derivative thereof, and combinations thereof.
2. The photosensitive resin composition according to claim 1 , wherein the triazine and derivatives thereof are selected from the group consisting of
hydroxyphenyl-S-triazine; 2-(4′-methoxyphenyl)-4,6-bis(2′hydroxy-4′-n-octyloxyphenyl)-1,3,5-triazine; 2,4-bis{[4-(3-(2-propyloxy)-2-hydroxy-propyloxy)-2-hydroxy]-phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine; 2,4-bis{[4-(2-ethyl-hexyloxy)-2-hydroxyl-phenyl}-6-[4-(2-methoxyethyl-carboxyl)-phenylamino]-1,3,5-triazine; 2,4-bis{[4-(tris(trimethylsilyloxy-silylpropyloxy)-2-hydroxy]-phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine; 2,4-bis{[4-(2′-methylprophenyloxy)-2-hydroxy]-phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine; 2,4-bis{[4-(1′,1′,1′,3′,5′,5′,5′-heptamethyltrisilyl-2′-methyl-propyloxy)-2-hydroxy]-phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine; 2,4-bis{[4-(4-(2-propyloxy)-2-hydroxy-propyloxy)-2-hydroxy]-phenyl}-6-[4-ethylcarboxy)-phenylamino]-1,3,5-triazine; and 2,4,6-trianiline-(p-carbo-2′-ethyl-1′-oxy)-1,3,5-triazine.
3. The photosensitive resin composition according to claim 1 , wherein the piperidine and derivatives thereof are selected from the group consisting of 4-benzoyl-2,2,6,6-tetramethylpiperidine; and 4-stearyloxy-2,2,6,6-tetramethyl-piperidine.
4. The photosensitive resin composition according to claim 1 , wherein the a) copolymer resin is acrylic copolymer or polyimide copolymer having weight average molecular weight of 5000-20000.
5. The photosensitive resin composition according to claim 1 , wherein the composition further comprises epoxy resin, an adhesive, sensitivity enhancer, or surfactant.
6. A method for forming an interlayer organic insulating film for TFT-LCD comprising forming said insulating layer using the photosensitive resin composition of claim 1 .
7. TFT-LCD comprising cured body of the photosensitive resin composition of claim 1 as an interlayer organic insulating film.