| 摘要 |
PURPOSE:To obtain a dye solvent for a pressure-sensitive recording paper, comprising m-isopropylbiphenyl, p-isopropylbiphenyl and diisopropylbiphenyl, being substantially odorless, being substantially free of separating-out of crystals at low temperature (e.g., 0 deg.C) and having an excellent initial color forming property. CONSTITUTION:A mixed solvent is used which comprises 0-20wt.% of m- isopropylbiphenyl (m-MIPB), 40-75wt.% of p-isopropylbiphenyl (p-MIPB) and 5-40wt.% of diisopropylbiphenyl (DIPB). If the content of m-MIPB exceeds 20wt.%, an odor problem is generated. If the content of p-MIPB exceeds 75wt.%, crystals will easily separate out at low temperature. If the content of DIPB exceeds 40wt.%, a low-temperature color forming property will be unsatisfactory. A pressure-sensitive recording paper has a coating layer of microcapsules which contain a solution of a dye (color former) for the recording paper in the solvent. |
