Recorders – Record receiver deforming
Patent
1984-07-31
1985-10-22
Hess, Bruce H.
Recorders
Record receiver deforming
204 2, 346217, 427151, B41M 520
Patent
active
045491925
ABSTRACT:
4-(N-Acylamino)-8-(N--R.sup.1 --N--R.sup.2 -amino)imidazophenoxazines useful as color formers, particularly in electrochromic recording systems, are prepared by the interaction of the corresponding 1,3-diamino-7-(N--R.sup.1 --N--R.sup.2 -amino)phenoxazinium halide with a reducing agent to obtain the corresponding leuco compound and subsequently interacting the leuco compound with at least two molecular proportions of an acylating agent.
REFERENCES:
patent: 3873340 (1975-03-01), Miyazawa et al.
patent: 3900217 (1975-08-01), Hayashi et al.
Hess Bruce H.
Miesle Terrence E.
The Hilton-Davis Chemical Co.
Wyatt B. Woodrow
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