SOLVENT FOR CHROMOGENIC DYE-PRECURSOR MATERIAL FOR PRESSURE-SENSITIVE RECORDING PAPER SHEET AND PRESSURE-SENSITIVE RECORDING PAPER SHEET PREPARED BY USING THE SOLVENT

摘要

ABSTRACT OF THE DISCLOSURE:Disclosed herein are a solvent for a chromogenic dye-precursor material for a pressure-sensitive recording paper sheet,comprising (1) 30 to 80% by weight of p-monoisopropylbiphenylor a biphenyl mixture of not less than 80% by weight ofp-monoisopropylbiphenyl, not more than 20% by weight ofm-monoisopropylbiphenyl and not more than 10% by weight ofdiisopropylbiphenyl, and (2) 70 to 20% by weight of diiso-propylnaphthalene or a naphthalene mixture of not less than 97%by weight of diisopropylnaphthalene, not more than 1% by weightof monoisopropylnaphthalene and not more than 2% by weightof triisopropylnaphthalene, and a pressure-sensitive recordingpaper sheet prepared by using the solvent.- 1 -