| 摘要 |
PURPOSE:To obtain the subject low-cost thermochromic material, composed of a specific perylenetetracarboxylic acid bisimide, excellent in color change, having high durability and especially active even at a semiconductor laser beam wavelength. CONSTITUTION:The objective thermochromic material is composed of a perylenetetracarboxylic acid bisimide of the formula n and n' are 0-4; m and m' are 0-5; R1 and R2 are alkyl, alkoxy or halogen) such as perylenetetracarboxylic acid bisbenzylimide. Furthermore, this material is preferably composed of a film formed from the perylenetetracarboxylic acid bisimide compound by a vapor method. |
