Curable resin for photo-patterning, process for producing the same, curable resin composition, color filter, liquid crystal panel substrate, and liquid crystal panel

A process for producing a curable resin for photo-patterning, comprising, reacting, with glycidyl acrylate and/or glycidyl methacrylate, a starting polymer having a molecular structure wherein at least the following units are connected:

• a constitutional unit having a cyclic imide group represented by the following formula (1):
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• wherein R3 and R4 each independently represent an alkyl group having 4 or less carbon atoms, or one of R3 and R4 is a hydrogen atom and the other thereof is an alkyl group having 4 or less carbon atoms, or R3 and R4 are combined with each other to form a carbon ring;
• a constitutional unit having an acid functional group;
• and a hydroxyl group.

A process for producing a curable resin for photo-patterning, comprising, reacting, with an isocyanate compound represented by the following formula (6):

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• wherein R10 represents an alkylene group and R11 represents a hydrogen atom or a methyl group, a starting polymer having a molecular structure wherein at least the following units are connected:
• a constitutional unit having a cyclic imide group represented by the formula (1):
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• wherein R3 and R4 each independently represent an alkyl group havin 4 or less carbon atoms, or one of R3 and R4 is a hydrogen atom and the other thereof is an alkyl group having 4 or less carbon atoms, or R3 and R4 are combined with each other to form a carbon ring;
• and a constitutional unit having an acid functional group.

A color filter, which comprises a transparent substrate, and a color layer disposed on the transparent substrate, and may comprise a protect layer for covering the color layer and/or a spacer disposed in a non-display region of the substrate, wherein at least one of the color layer, the protect layer and the spacer is formed by curing the curable resin composition for photo-patterning which comprises an imide-containing copolymer having a molecular structure wherein at least the following units are connected:

• a constitutional unit having a cyclic imide group represented by the following formula (1):
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• wherein R3 and R4 each independently represent an alkyl group having 4 or less carbon atoms, or one of R3 and R4 is a hydrogen atom and the other thereof is an alkyl group having 4 or less carbon atoms, or R3 and R4 are combined with each other to form a carbon ring;
• a constitutional unit having an acid functional group;
• and a constitutional unit having a photopolymerizing functional group other than the cyclic imide group.

A liquid crystal panel substrate, wherein plural spacers are disposed in a non-display region on a substrate, the spacers are formed by curing the curable resin composition for photo-patterning which comprises an imide-containing copolymer having a molecular structure wherein at least the following units are connected:

• a constitutional unit having a cyclic imide group represented by the following formula (1):
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• wherein R3 and R4 each independently represent an alkyl group having 4 or less carbon atoms, or one of R3 and R4 is a hydrogen atom and the other thereof is an alkyl group having 4 or less carbon atoms, or R3 and R4 are combined with each other to form a carbon ring;
• a constitutional unit having an acid functional group;
• and a constitutional unit having a photopolymerizing functional group other than the cyclic imide group, and wherein the elastic deformation modulus “(elastic deformation quantity/total deformation quantity)×100” of the spacers is 60% or more against a compressive load of 2.0 GPa at room temperature.