Solvent of a chromogenic dye-precursor material for pressure-sensitive recording paper, the pressure-sensitive recording paper and process for producing the solvent
AssigneeKureha Kagaku Kogyo Kabushiki Kaishi
InventorsTadashi Nakamura, Takashi Terauchi, Shoichi Hoshi
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Abstract
Disclosed herein are (1) a solvent of a chromogenic dye-precursor material for pressure-sensitive recording paper, which solvent comprises a diarylalkanes containing not less than 80% by weight of a mixture of 1-tolyl-2-phenylpropane and 1,2-ditolylethane, obtained by coupling ethylbenzene and xylene by side-chain dehydrogenation, (2) the pressure-sensitive recording paper sheet prepared by using the solvent and (3) a process for producing the solvent.
Claims2
A pressure-sensitive recording paper sheet comprising a paper sheet having a layer of microcapsules containing a chromogenic dye-precursor and a solvent for said dye-precursor, wherein said solvent comprises diarylalkanes which contain not less than 80% by weight of a mixture of 1-tolyl-2-phenylpropane and 1,2-ditolylethane, and are obtained by subjecting ethylbenzene and xylene to "coupling by side-chain dehydrogenation".
Dependencies are inferred from the claim text.