| 摘要 |
Pressure-sensitive copying or recording material which contains, in its color-producing system, as the color former, at least one azomethine compound of the formula <IMAGE> <IMAGE> (1) WHEREIN R1, R2, R3 and R4 each represent hydrogen, alkyl of 1 to 4 carbon atoms, cyanoalkyl of 2 to 5 carbon atoms, unsubstituted benzyl or phenyl, or benzyl or phenyl substituted by halogen, alkyl of 1 to 4 carbon atoms or alkoxy of 1 to 4 carbon atoms, or R1 and R2 conjointly represent alkylene of 4 to 5 carbon atoms and/or R3 and R4 conjointly represent alkylene of 4 or 5 carbon atoms, X1 and X2 each represent hydrogen, halogen, alkyl of 1 to 4 carbon atoms or alkoxy of 1 to 4 carbon atoms, A represents naphthylene or phenylene which is unsubstituted or substituted by halogen, alkyl of 1 to 5 carbon atoms, ALKOXY OF 1 TO 4 CARBON ATOMS, PHENOXY, HALOGENOPHENOXY OR ACYLAMINO OF 1 TO 9 CARBON ATOMS, AND N IS 1 OR 2. |
