Composite retardation plate, its production method, composite optical member and liquid crystal display

A process for producing a composite retardation plate, comprising

• a primer layer-forming step in which a primer layer is formed on the surface of a first retardation plate;
• a coating layer-forming step in which a coating liquid containing an organic modified clay complex and a binder resin in an organic solvent is applied to a transfer substrate to form a coating layer thereon, and the solvent is removed from the coating layer to obtain a second retardation plate;
• a laminating step in which the primer layer obtained in the primer layer-forming step and the second retardation plate obtained in the coating layer-forming step are laminated on each other;
• a transfer substrate-peeling step in which the transfer substrate is peeled from the second retardation plate;
• and
• a pressure-sensitive adhesive layer-forming step in which a pressure-sensitive adhesive layer is formed on the surface of the second retardation plate,
• wherein, at least, the primer layer-forming step and the coating layer-forming step are conducted prior to other steps, and
• wherein the respective steps are conducted so as to obtain a layer structure consisting of the first retardation plate/the primer layer/the second retardation plate/the pressure-sensitive adhesive layer.

A process for producing a composite retardation plate, comprising:

• a primer layer-forming step in which a primer layer is formed on the surface of a first retardation plate;
• a coating layer-forming step in which a coating liquid containing an organic modified clay complex and a binder resin in an organic solvent is applied to the surface of the primer layer to form a coating layer thereon, and the solvent is removed from the coating layer to obtain a second retardation plate;
• and
• a pressure-sensitive adhesive layer-forming step in which a pressure-sensitive adhesive layer is formed on the surface of the second retardation plate,
• wherein these steps are conducted in this order so as to obtain a layer structure consisting of the first retardation plate/the primer layer/the second retardation plate/the pressure-sensitive adhesive layer.