94-72-4Relevant academic research and scientific papers
Dyestuff-containing microscopic capsule dispersion for record materials
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, (2008/06/13)
A dyestuff-containing microscopic capsule dispersion for record materials, which comprises at least one methine dyestuff represented by the general formula (I): STR1 wherein X means a phenyl, naphthyl, indolyl, β-styryl, pyridyl, pyrimidyl or pyrazinyl group which may optionally be substituted, R1 -R6 are individually an amino, substituted amino, lower alkyl, cycloalkyl, lower alkoxy or lower haloalkyl group or a halogen or hydrogen atom, R7 and R8 are each a hydrogen or halogen atom or a lower alkoxy group and may be coupled together to form a ring, and said methine dyestuff contains at least one substituted amino group at a position para to the central methine group in the molecule thereof, said methine dyestuff being contained in microscopic capsules; and alkanolamine represented by the general formula (II): STR2 wherein R denotes a lower alkylene, hydroxyalkylene or poly(oxyalkylene) group, R' and R" mean individually a hydrogen atom, an alkyl, hydroxyalkyl, aryl, aralkyl, acyl, or ω-hydroxyalkyl-polyoxyalkylene group or a lower alkyl ether of an ω-hydroxyalkyl-polyoxyalkylene group, and R' and R" may be coupled together to form a ring, and/or a metal ion sequestering agent, said alkanolamine and/or metal ion sequestering agent being contained in said microscopic capsules and/or a liquid medium wherein said microscopic capsules are dispersed.
