Fluoran compounds and color forming recording materials using sa

Details Fluoran compounds and color forming recording materials using sa Fluoran compounds and color forming recording materials using sa

1987-07-29

1989-05-02

Hess, Bruce H.

Record receiver having plural interactive leaves or a colorless

Having a colorless color-former, developer therefor, or...

Identified organic electron acceptor other than phenolic resin

427151, 428913, 428914, 503220, 503221, 503223, B41M 516, B41M 518, B41M 522

Patent

active

048268062

ABSTRACT:
Fluoran compounds are disclosed of formula (I) ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently represent hydrogen, halogen, lower alkoxy, C.sub.1 -C.sub.9 -alkyl, C.sub.5 or C.sub.6 -cycloalkyl, benzyl or phenyl, said benzyl or phenyl being optionally substituted by halogen, lower alkyl or lower alkoxy, and further R.sub.1 and R.sub.2 as well as R.sub.3 and R.sub.4 taken together with Ring A, may form a naphthalene ring optionally substituted by halogen, lower alkyl or lower alkoxy, R.sub.5, R.sub.6 and R.sub.7 independently represent halogen, lower alkyl or lower alkoxy, B.sub.1 and B.sub.2 independently represent hydrogen, C.sub.1 -C.sub.8 -alkyl, benzyl or phenyl, said benzyl or phenyl being optionally substituted by halogen, lower alkyl, lower alkoxy, or alkyl-substituted amino, X represents hydrogen atom or --NR.sub.8 R.sub.9 wherein R.sub.8 and R.sub.9 independently represent hydrogen, C.sub.1 -C.sub.8 -alkyl, C.sub.5 or C.sub.6 -cycloalkyl, or benzyl, said benzyl being optionally substituted by halogen, lower alkyl, lower alkoxy, or alkyl-substituted amino, and further R.sub.8 and R.sub.9 taken together with the adjacent nitrogen atom to which they are attached, may form a pyrrolidino, piperidino or morpholino ring, Ring B being optionally substituted by halogen, n, p and q independently represent 0, 1 or 2, and m represents 0, 1, 2 or 3, provided that when m is 0 or 1, X is not hydrogen atom. The compounds are used, together with a developer, in color forming recording materials such as pressure-sensitive copying papers, heat-sensitive recording papers and the like.

REFERENCES:
patent: 4687862 (1987-08-01), Obitsu et al.

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