Fluoran compounds

Details Fluoran compounds Fluoran compounds

1985-03-01

1986-12-16

Raymond, Richard L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

106 21, 346221, C07D40704

Patent

active

046298002

ABSTRACT:
Fluoran compounds of the structural formula: ##STR1## wherein R.sub.1 is propyl or butyl, R.sub.2 is an alkyl of from one to four carbon atoms, R.sub.3 is methyl or ethyl, and R.sub.4 is hydrogen or methyl are particularly suitable for use in providing high quality pressure, heat or electrothermal sensitive recording sheets containing a color former in operative association with an electron-accepting substance.

REFERENCES:
patent: 3825561 (1974-07-01), Akamatsu et al.
patent: 4104437 (1978-08-01), Vincent et al.
patent: 4364999 (1982-12-01), Motohashi et al.
patent: 4444591 (1984-04-01), Kawai et al.
patent: 4535348 (1985-08-01), Iwakura et al.

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