| abstract |
NEW MATERIAL:A fluoran compound shown by the formula I [R 1 is 1W8C alkyl, cycloalkyl, cyclic alkyl, phenyl, alkoxyalkyl, benzyl, or H; R 2 is H, halogen, 1W 4C alkyl, phenyl, benzyl, or lower alkoxy(alkyl); R 3 is H, Cl, F, 1W4C alkyl; n is 1W3]. n EXAMPLE: 2-Anilino-3-methyl-6-N-cyclohexylmethyl-N-ethylaminofluoran. n USE: A color former (dyestuff precursor) for heat-sensitive recording paper, electrosensitive heat-sensitive recording paper, pressure-sensitive manifold paper, etc., showing black hue. n PREPARATION: A diphenylamine derivative shown by the formula II (R 4 is H, acetyl, or lower alkyl) is reacted with a benzophenone shown by the formula IIIin the presence of 80W100wt% sulfuric acid at 0W80°C. n COPYRIGHT: (C)1985,JPO&Japio |