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US 3,946,017 AGranted
Lactones of the benzaxanthere series and dye-forming components for use in duplication processes
AssigneeBadische Anilin- & Soda-Fabrik Aktiengesellschaft
InventorsErnst Schefczik, Hellmut Kast
Life of this patent
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Abstract
Lactones of the benzazaxanthene series based on 4-dialkylaminobenzoic acid compounds and homophthalic acid imides. The new lactones are eminently suitable as dye-forming components in the red range for pressure-sensitive recording material.
Claims6
A lactone of the benzazaxanthene series of the formula ##SPC10##
- wherein
- R.sup.1 and R.sup.2 denote methyl or ethyl, and
- R.sup.3 denotes alkyl of from 1 to 20 carbon atoms, alkoxyalkyl of from 2 to 12 carbon atoms, 3-diethylaminopropyl, 2-phenylethyl, 2-methyl-2-phenylethyl, 3-(2'-phenoxyethoxy)-propyl, o-tolyl, p-tolyl or cyclohexyl.
The compound of the formula ##SPC11##
The compound of the formula ##SPC12##
A lactone of the formula ##SPC13##
- wherein
- R.sup.1 and R.sup.2 denote methyl or ethyl,
- R.sup.3.sup.' denotes methyl, ethyl, butyl, hexyl, dodecyl, stearyl, 3-(2-ethylhexoxy)-propyl, 2-hexoxyethyl, 3-ethoxypropyl, 3-(2'-phenoxyethoxy)-propyl, 3-diethylaminopropyl, 2-phenylethyl, 2-methyl-2-phenylethyl, o-tolyl or p-tolyl.
Dependencies are inferred from the claim text.