Chromogenic azaphthalide compound and a colour-forming recording

Details Chromogenic azaphthalide compound and a colour-forming recording Chromogenic azaphthalide compound and a colour-forming recording

1987-06-26

1988-05-31

Yarbrough, Amelia Burgess

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

503218, 427151, C09D 1100

Patent

active

047478756

ABSTRACT:
Disclosed herein is a chromogenic compound of the formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 respectively represent an alkyl group having 1 to 4 carbon atoms; R.sup.5 represents an alkyl group having 5 to 8 carbon atoms or a cycloalkyl group having 5 to 7 carbon atoms; one of X and Y represents a nitrogen atom and the other of X and Y represents a carbon atom, and a color-forming recording composition containing at least one of the chromogenic compounds.

REFERENCES:
patent: 3775424 (1973-11-01), Farber
patent: 3853869 (1974-12-01), Farber
patent: 4046776 (1977-09-01), Garner et al.
patent: 4275905 (1981-06-01), Miller
patent: 4299411 (1981-11-01), Brockett

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