Coloring phthalide compounds, method of producing the compounds

Details Coloring phthalide compounds, method of producing the compounds Coloring phthalide compounds, method of producing the compounds

1987-11-20

1989-11-14

Hess, Bruce H.

Record receiver having plural interactive leaves or a colorless

Having a colorless color-former, developer therefor, or...

Identified color-former

427151, 428913, 428914, 503223, B41M 516, B41M 518, B41M 522

Patent

active

048807621

ABSTRACT:
Coloring phthalide compounds having general formula [I], a method of producing the phthalide compounds and a recording material comprising as a coloring component any of the coloring phthalide compounds are disclosed, ##STR1## wherein R.sup.1 and R.sup.2 each represent a straight chain or branched alkyl group having 1 to 6 carbon atoms, a cycloalkyl group, or a benzyl group, and R.sup.1 and R.sup.2 in combination may form a ring; R.sup.3 represents an alkyl group having 1 to 4 carbon atoms; R.sup.4 represents a dialkylamino group having 1 to 6 carbon atoms, a cyclic amino group or halogen, l is an integer of 0 to 4; A represents ##STR2## wherein R.sup.5 and R.sup.6 each represent a straight chain or branched alkyl group having 1 to 8 carbon atoms, a cycloalkyl group, or a benzyl group, R.sup.5 and R.sup.6 in combination may form a ring; and B is the same as A, or represents a phenyl group which may have a substituent.

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