Fluoran derivatives and their use in recording materials
申请人:Appleton Papers Inc.
公开号:US04910183A1
公开(公告)日:1990-03-20
The invention relates to novel fluoran compounds of the general formula ##STR1## wherein R.sub.1 and R.sub.2, each independently of the other, are lower alkyl; A is ##STR2## or a pyrrolidinyl, piperidino, morpholino or piperazino radical; and R.sub.3 and R.sub.4, each independently of the other, are C.sub.1 -C.sub.12 alkyl, cycloalkyl, phenyl or phenyl substituted by lower alkyl or lower alkoxy. These compounds are particularly suitable for use as color formers in pressure-sensitive or heat-sensitive recording materials.
Process for the preparation of 4-methoxy-2,2',6'-trimethyldiphenylamine
申请人:MITSUI TOATSU CHEMICALS, Inc.
公开号:EP0659736A1
公开(公告)日:1995-06-28
Described is a process for the preparation of 4-methoxy-2,2',6-trimethyldiphenylamine, which comprises heating and reacting 2,6-dimethylcyclohexanone and 2-methyl-4-methoxyaniline in the presence of a dehydrogenation catalyst while removing the resultant hydrogen and water from the reaction system.