Vinyl phthalide color formers
AssigneeNCR Corporation
InventorSheldon Farber
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Abstract
A chromogenic compound of normally colorless form is disclosed having the following structural formula: ##STR1## wherein A can be ##STR2## T, Q, X, Y and Z can be, among several others, hydrogen, alkyl, alkoxy, aryl, and heterocyclic, substituted and unsubstituted; and E can be a broad family of aromatic and heterocyclic structures. The compound is eligible for use in pressure-sensitive record materials and manifold marking systems. Because of light absorption characteristics, selected compounds of this invention are especially useful where machine readability and machine copiability are important.
Claims10
A compound represented by a formula selected from:
- ##STR24## wherein E is ##STR25## 4-(N-piperidino)phenyl and 4-(N-pyrrolidino)phenyl;
- Y is 4-(N-piperidino)phenyl, 4-(N-pyrrolidino)phenyl, phenyl and ##STR26## R.sub.1 is hydrogen, alkyl and phenyl;
- R.sub.2 is alkyl and cycloalkyl;
- R.sub.3 is hydrogen and alkoxy having 1 to 4 carbons;
- and
- R.sub.7 and R.sub.8 are alkyl;
- provided when Y is phenyl or ##STR27## 4-(N-piperidino)phenyl, 4-(N-pyrrolidino)phenyl;
- Y is any X, hydrogen and ##STR28## R.sub.1, R.sub.2, R.sub.7 and R.sub.8 are alkyl;
- and R.sub.3 is hydrogen, methoxy, ethoxy and chlorine;
- provided when E is ##STR29## wherein X is ##STR30## 4-(N-piperidino)phenyl and 4-(N-pyrrolidino)phenyl;
- Y is hydrogen, phenyl, ##STR31## wherein T is kairol-6-yl and julolidin-9-yl;
- ##STR32##
A compound represented by the formula:
- ##STR33## wherein R.sub.1 and R.sub.2 are alkyl.
A compound represented by the formula:
- ##STR34## T is 4-(N-morpholino)phenyl and ##STR35## R.sub.1 is hydrogen, alkyl, tolyl and cyclohexyl;
- R.sub.2 is hydrogen and alkyl;
- R.sub.3 is hydrogen and alkoxy;
- and
- R.sub.7 and R.sub.8 are alkyl.
3-(p-diethylaminophenyl)-3- [2-methyl-bis-1,1-(p-dimethylaminophenyl)ethyleno-2] phthalide.
3-(2-methoxy-4-diethylaminophenyl)-3-[2-methyl-bis-1,1-(p-di ethylaminophenyl)ethyleno-2]-4,5,6,7-tetrachlorophthalide.
3-[4-(N-morpholino) phenyl]-3-[2-methyl-bis-1,1-(p-diethylaminophenyl) ethyleno-2] phthalide.
Dependencies are inferred from the claim text.