| 摘要 |
PURPOSE:To improve the heat and moisture resistances of a polarizing plate by injecting a liq. crystal composition composed chiefly of a specified dichromatic dye and a vinyl monomer as a liq. crystal into the space between 2 sheets of horizontally oriented ''NESA '' glass and polymerizing the monomer under heating while applying voltage in the vertical direction. CONSTITUTION:A p type dichromatic dye and a polymn. catalyst are added to a high molecular thermotropic liq. crystal having a liq. crystal group in the side chain of each methyl methacrylate monomer through a spacer and represented by the formula, and they are mixed to prepare a liq. crystal composition. The liq. crystal composition is injected into the space of a cell using 2 sheets of ''NESA '' glass oriented horizontally by rubbing or othe treatment. While heating and holding the resulting liq. crystal cell at a temp. at which the liq. crystal phase is shown, e.g. at 150 deg.C, an electric field of 100V is applied in the vertical direction to cause the uniaxial and horizontal orientation of the liq. crystal composition, and after dropping the temp. to room temp. in the state, the application of the electric field is stopped. The ''NESA '' glass is then removed to obtain a filmlike color polarizing plate with superior heat and moisture resistances. |
