Title:
THERMOCHROMIC MATERIAL AND THERMOCHROMIC FILM COMPOSED OF THE SAME MATERIAL
Document Type and Number:
Japanese Patent JPH05214331
Kind Code:
A
Abstract:
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.
Inventors:
YOSHIKAWA MASAO
SUZUKI TETSUO
IKUNO HIROSHI
NAGAI KAZUKIYO
SUZUKI TETSUO
IKUNO HIROSHI
NAGAI KAZUKIYO
Application Number:
JP17621492A
Publication Date:
August 24, 1993
Filing Date:
June 10, 1992
Export Citation:
Assignee:
RICOH KK
International Classes:
B41M5/337; B41M5/26; C07D471/06; C09K9/02; (IPC1-7): B41M5/26; C07D471/06; C09K9/02
Attorney, Agent or Firm:
Eiji Tomomatsu (1 person outside)