Anthraquinone dyestuffs, processes for their preparation, their use, and liquid-crystalline materials containing anthraquinone dyestuffs
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United States of America Patent
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Apr 29, 1986
Grant Date -
N/A
app pub date -
Nov 25, 1981
filing date -
Dec 12, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Anthraquinone dyestuffs of the formula ##STR1## in which R.sub.1 and R.sub.2 denote hydrogen, alkyl, cycloalkyl, aryl or aralkyl, and the said hydrocarbon radicals can be substituted, and Q denotes an aryl radical or heterocyclic radical or an --OR', --SR', --CH.dbd.N--R', ##STR2## --CHO or --SO.sub.2 --O--R' radical, wherein R' represents an aryl, aralkyl or heterocyclic radical, and the radicals mentioned for R' can be substituted, processes for their preparation, and liquid-crystalline materials containing anthraquinone dyestuffs.
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