JPS55137163A - Fluoran compound, preparing the same, and copy paper using the same - Google Patents
Fluoran compound, preparing the same, and copy paper using the sameInfo
- Publication number
- JPS55137163A JPS55137163A JP4475679A JP4475679A JPS55137163A JP S55137163 A JPS55137163 A JP S55137163A JP 4475679 A JP4475679 A JP 4475679A JP 4475679 A JP4475679 A JP 4475679A JP S55137163 A JPS55137163 A JP S55137163A
- Authority
- JP
- Japan
- Prior art keywords
- cpd
- formula
- same
- fluoran
- derivative
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Color Printing (AREA)
Abstract
NEW MATERIAL:Fluoran represented by the formula I (R1, R2 are H, lower alkyl, cycloalkyl, benzyl, phenyl, methyl-substituted phenyl; R3W6 are H, methyl).
USE: Electron doner coupler for pressure-sensitive or heat-sensitive copy paper.
PREPARATION: An m-aminophenol derivative and naphthalene-2,3-dicarboxylic anhydride are condensed by dehydration to provide the formula II cpd. of 2-(4- amino-2-hydroxy)benzoylnaphthalene-3-carboxylic acid derivative, which is reacted with the formula III cpd. of a diphenylamine derivative at 0W100°C for several to several tens of hours in the presence of dehydration-condensation agent, such as sulfuric acid or boron trifuoride. The product is poured into ice water, and produced precipitate is filtered and neutralized with alkali to provide a colored crystal, which is filtered out, dried, and recrystallized to provide a fluoran cpd. of the formula (I). This cpd. is itself colorless, but develops black color in contact with an acidic material and, as such, is a coloring material excellent in resistance to light and water.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4475679A JPS55137163A (en) | 1979-04-11 | 1979-04-11 | Fluoran compound, preparing the same, and copy paper using the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4475679A JPS55137163A (en) | 1979-04-11 | 1979-04-11 | Fluoran compound, preparing the same, and copy paper using the same |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55137163A true JPS55137163A (en) | 1980-10-25 |
Family
ID=12700269
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4475679A Pending JPS55137163A (en) | 1979-04-11 | 1979-04-11 | Fluoran compound, preparing the same, and copy paper using the same |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55137163A (en) |
-
1979
- 1979-04-11 JP JP4475679A patent/JPS55137163A/en active Pending
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