Dyestuff-containing microscopic capsule dispersion for record materials.

摘要

A dyestuff-containing microscopic capsule dispersion for record materials, which comprises at least one methine dyestuff represented by the general formula (I):
<Chemistry id="chema01" num="0001"><Image id="ia01" he="23" wi="60" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein X means a phenyl, naphthyl, indolyl, β-styryl, pyridyl, pyrimidyl or pyrazinyl group which may optionally be substituted, R<Sub>1</Sub> - R<Sub>6</Sub> are individually an amino, substituted amino, lower alkyl, cycloalkyl, lower alkoxy or lower haloalkyl group or a halogen or hydrogen atom, R<Sub>7</Sub> and R<Sub>a</Sub> are each a hydrogen 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):
<Chemistry id="chema02" num="0002"><Image id="ia02" he="15" wi="62" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>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.