Chromogenic fluoran derivatives and the preparation and use thereof
AssigneeShin Nisso Kako Co., Ltd.
InventorsMasakichi Yahagi, Shoichi Horiuchi, Takahumi Toyama, Akio Kashiwagi, Teruo Suzuki, Tetsuo Igaki, Kazuyuki Horisawa, Mituhiro Shoji
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Abstract
A recording material which is suitable as a pressure-sensitive or heat-sensitive copying paper or recording paper by developing a color in contact with an electron-accepting material which comprises certain fluoran derivatives containing piperidino, pyrrolidino, morpholino and cycohexylamino groups.
Claims2
A method of recording by development of color, which comprises intimately contacting at least one of fluoran derivatives of the formula, ##SPC71##
- wherein R is a piperidino group, a pyrrolidino group, a morpholino group, a methylpiperidino group, a cyclohexylamino group, an N-lower alkyl-cyclohexylamino group or an N-benzylcyclohexylamino group;
- R.sub.1 is a hydrogen atom, a lower alkyl group, a substituted or unsubstituted amino group or a halogen atom;
- R.sub.2 is a hydrogen atom, a lower alkyl group, a lower alkoxy group or a halogen atom;
- R.sub.3 is a hydrogen atom, a C.sub.1-8 alkyl group, a phenyl group, a piperidino group, a methylpiperidino group, a pyrrolidino group, a morpholino group, a group of the formula ##EQU2## (where X represents a hydrogen atom, an acyl group, an alkyl group, a benzyl group, a cyclohexyl group or a substituted or unsubstituted aryl group;
- and Y represents a hydrogen atom, a lower alkyl group or a substituted or unsubstituted benzyl group), a halogen atom, an alkoxy group or a substituted or unsubstituted diphenylmethylamino group;
- and R.sub.4 is a hydrogen atom, a lower alkyl group or an alkoxy group, provided that R.sub.1 and R.sub.2, and R.sub.3 and R.sub.4, may be groups represented by the formula --CH=CH--CH= CH--, and, in this case, the naphthalene ring may have a and the benzene ring C atom or a substituted or unsubstituted amino group, and the benzene ring C may have 1 to 4 halogen atoms, with an electron accepting material, thereby permitting said fluoran derivative to develop a color. provided that when R is piperidino, pyrrolidino, morpholino, cyclohexylamino or N-methylcyclohexylamino, at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is a substituent other than H, lower alkyl and halogen.
A thermo- or pressure-sensitive, recording material which comprises a paper base and as a color former, a compound of the formula. ##SPC72## wherein R is a piperidino group, a pyrrolidino group, a morpholino group, a methylpiperidino group, a cyclohexylamino group, an N-lower -alkyl-cyclohexylamino group or an N-benzylcyclohexylamino group;
- R.sub.1 is a hydrogen atom, a lower alkyl group, a substituted or unsubstituted amino group or a halogen atom;
- R.sub.2 is a hydrogen atom, a lower alkyl group, a lower alkoxy group or a halogen atom;
- R.sub.3 is a hydrogen atom, a C.sub.1-8 alkyl group, a phenyl group, a piperidino group, a methylpiperidino group, a pyrrolidino group, a morpholino group, a group of the formula ##EQU3## (where X represents a hydrogen atom, an acyl group, an alkyl group, a benzyl group, a cyclohexyl group or a substituted or unsubstituted aryl group;
- and Y represents a hydrogen atom, a lower alkyl group or a substituted or unsubstituted benzyl group), a halogen atom, an alkoxy group or a substituted or unsubstituted diphenylmethylamino group;
- and R.sub.4 is a hydrogen atom, a lower alkyl group or an alkoxy group, provided that R.sub.1 and R.sub.2, and R.sub.3 and R.sub.4, may be groups represented by the formula -CH=CH-CH=CH-, and, in this case, the naphthalene ring may have a halogen atom or a substituted or unsubstituted amino group, and the benzene ring C may have 1 to 4 halogen atoms, provided that when R is piperidino, pyrrolidino, morpholino, cyclohexylamino or N-methylcyclohexylamino, at least one of R.sub.1, R.sub.2 R.sub.3 and R.sub.4 is a substituent other than H, lower alkyl and halogen.
Dependencies are inferred from the claim text.