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AssigneeMitsui Toatsu Chemicals, Inc.
InventorsTsukasa Ohyama, Yasushi Shimokawa, Isamu Ghoda, Keisuke Takuma, Hitoshi Koshida
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Described herein are heat-sensitive sublimation transfer cyan dyes represented by the following formula (I): ##STR1## wherein R.sub.1 represents a hydrogen atom, an alkyl group, an alkoxyl group, an alkylcarbonylamino group, a formylamino group or a halogen atom, R.sub.2 and R.sub.3 represent an alkyl group, an alkenyl group, an alkoxyalkyl group, an aralkyl group, an aryl group, a halogenoalkyl group or a cyanoalkyl group or are coupled together to form a ring, and X represents any one of the following groups: ##STR2## Heat-sensitive sublimation transfer sheets containing one or more dyes selected from the group of the above dyes are also described.
A heat-sensitive sublimation transfer cyan dye represented by the following formula (I):
A cyan dye of claim 4, wherein, in formula (I), R.sub.2 and R.sub.3 each are an alkyl group.
A cyan dye of claim 7, wherein, in formula (I), R.sub.2 and R.sub.3 each are an alkyl group.
A heat-sensitive sublimation transfer sheet comprising one or more dyes selected from the group consisting of dyes represented by the following formula (I):
Dependencies are inferred from the claim text.