Pyrazolonylazoaniline or aminonaphtyl compounds for copying proc

Details Pyrazolonylazoaniline or aminonaphtyl compounds for copying proc Pyrazolonylazoaniline or aminonaphtyl compounds for copying proc

1976-11-01

1978-10-10

Higel, Floyd D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260156, 260163, 427146, 428323, C09B 2906, C09B 2908

Patent

active

041196228

ABSTRACT:
An azo compound useful in copying processes of the formula ##STR1## where R.sup.1 is hydrogen or alkyl of 1 to 4 carbon atoms, R.sup.2 and R.sup.3 are each alkyl of 1 to 4 carbon atoms, or one of the radicals R.sup.1, R.sup.2 and R.sup.3 is unsubstituted phenyl or phenyl substituted by alkyl of 1 to 4 carbon atoms, methoxy or ethoxy, and A denotes ##STR2## where R.sup.4 and R.sup.5 are each hydrogen; alkyl of 1 to 8 carbon atoms which may be substituted by hydroxy, alkoxy, halogen or alkoxycarbonyl; cyanoethyl; alkylcarbonyl with 1 to 3 carbon atoms in the alkyl; cyclohexyl; phenalkyl of 7 to 10 carbon atoms; or substituted or unsubstituted phenyl, or R.sup.4 is N,N-dialkylaminoalkyl or N,N-bisphenalkylaminoalkyl, or the group ##STR3## is a 5-membered or 6-membered saturated heterocyclic ring which may contain an --O-- or --S-- group as ring member, Y is hydroxy, alkyl, alkoxy, chlorine, bromine or alkylcarbonylamino, n is 0, 1 or 2, R.sup.6 and R.sup.7 are each hydrogen, alkyl of 1 to 4 carbon atoms, cyclohexyl or unsubstituted phenyl or phenyl substituted by alkyl or alkoxy, and Z is hydrogen, hydroxy, methoxy, ethoxy or a sulfonic acid group. The light absorption of the yellow to orange colored compounds (I) is displaced, upon protonation of the compounds, by 150 to 200 nm toward the longer wavelength range, i.e. the salts are violet to blue in color.
The compounds (I) are suitable for the production of pressure-sensitive n.c.r. papers.

REFERENCES:
patent: 2391180 (1945-12-01), McNally et al.
patent: 3124567 (1964-03-01), Forter et al.
patent: 3223527 (1965-12-01), Dreyfuss
patent: 3697501 (1972-10-01), Dehnert
patent: 3751405 (1973-08-01), Angliker et al.
patent: 3948878 (1976-04-01), Coispeau
patent: 3955088 (1976-11-01), Garner et al.

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