Colorless carbazole dyes for recording materials

Details Colorless carbazole dyes for recording materials Colorless carbazole dyes for recording materials

1986-11-20

1988-04-12

Ramsuer, Robert W.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

427151, 503223, 503224, C07D20986

Patent

active

047375876

ABSTRACT:
Disclosed is a colorless dye for use in recording materials comprising a compound represented by the general formula: ##STR1## Said recording materials are of the types which utilize a color developing reaction between an electron-donating colorless dye and an electron-accepting color developer, such as, carbonless pressure-sensitive recording materials, thermosensitive recording materials, etc.

REFERENCES:
patent: 4275005 (1981-06-01), Petitpierre et al.

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