Chromogenic compounds and the use thereof as color former in cop

Details Chromogenic compounds and the use thereof as color former in cop Chromogenic compounds and the use thereof as color former in cop

1982-02-23

1984-04-24

Lieberman, Allan

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106137, 106193D, 106214, 523161, 524 22, 524 44, 524 45, 524 46, 524 47, 524110, 524114, 549265, C07D49710, C09D 300

Patent

active

044445911

ABSTRACT:
Novel chromogenic fluoran compounds of the formula: ##STR1## wherein R.sub.1 is selected from the group consisting of alkyl radicals of from five to eight carbon atoms; R.sub.2 is selected from the group consisting of alkyl radicals of from one to eight carbon atoms; R.sub.3 is selected from the group consisting of hydrogen atom and lower alkyl radicals of from one to four carbon atoms; X.sub.1 and X.sub.2 are independently selected from the group consisting of hydrogen atom and lower alkyl radicals of from one to four carbon atoms, X.sub.3 is selected from the group consisting of hydrogen atom, lower alkyl radicals of from one to four carbon atoms, halogen atoms and trifluoromethyl radical; and n is an integer of a value of 1 or 2; providing that R.sub.1 does not represent an amyl radical when R.sub.2 is selected from the group consisting of alkyl radicals of from one to five carbon atoms, X.sub.1 and X.sub.2 are each a hydrogen atom, X.sub.3 is selected from the group consisting of hydrogen atom, lower alkyl radicals of from one to four carbon atoms and halogen atoms.

REFERENCES:
patent: 3996405 (1976-12-01), Porter

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