| 摘要 |
PURPOSE:To prevent an ink from bleeding upon recording, prevent the ink from bleeding even when a paper is wetted after recording and prevent a record from being lost, by incorporating a quaternary ammonium salt of carboxymethyl cellulose into recording paper. CONSTITUTION:A quaternary ammonium salt of carboxymethyl cellulose (CMC) can be synthesized from sodium salt of CMC and a quaternary ammonium salt such as a quaternary ammonium halide salt. As CMC, one having a degree of substitution by carboxymethyl of at least 1.5, and preferably at least 2.0, is used. The quaternary ammonium salt may be a lauryltrimethylammonium salt, a cetyltrimethylammonium salt or the like, and the anion constituting the salt is suitably a halide ion such as chloride, bromide and fluoride ion, sulfate ion, nitrate ion, phosphate ion or the like. Recording paper comprising the quaternary ammonium salt of CMC can be produced by providing the paper with a solution of the salt in an organic solvent by spraying, coating, immersion or impregnation, followed by removing the solvent. |
