Patents Assigned to Kanzai Paper Manufacturing Company Ltd.
  • Heat-sensitive recording material
    Patent number: 4542395
    Abstract: Novel phenolic compounds useful as a color developer suitable for satisfying the quality requirements of heat-sensitive recording materials are provided, which compounds are expressed by the general formula ##STR1## wherein R.sub.1 represents an alkyl group or a cycloalkyl group and R.sub.2 represents hydrogen atom or an alkyl group; and also heat-sensitive recording materials usable in a broad application field are provided, which recording materials are provided with a heat-sensitive recording layer composed mainly of a colorless basic dye and the above compounds as a color developer by which the dye forms colors, overlaid on a substrate.
    Type: Grant
    Filed: November 5, 1984
    Date of Patent: September 17, 1985
    Assignees: Sanko Kaihatsu Kagaku Kenkyusho, Kanzai Paper Manufacturing Company Ltd.
    Inventors: Toranosuke Saito, Masakatu Kitani, Takashi Ishibashi, Naoto Arai, Takeshi Murakami, Toshitake Suzuki
  • Phenolic compounds and a heat-sensitive recording material containing the same
    Patent number: 4535190
    Abstract: Novel phenolic compounds useful as a color developer suitable for satisfying the quality requirements of heat-sensitive recording materials are provided, which compounds are expressed by the general formula ##STR1## wherein R.sub.1 represents an alkyl group or a cycloalkyl group and R.sub.2 represents hydrogen atom or an alkyl group; and also heat-sensitive recording materials usable in a broad application field are provided, which recording materials are provided with a heat-sensitive recording layer composed mainly of a colorless basic dye and the above compounds as a color developer by which the dye forms colors, overlaid on a substrate.
    Type: Grant
    Filed: March 23, 1984
    Date of Patent: August 13, 1985
    Assignees: Sanko Kaihatsu Kagaku Kenkyusho, Kanzai Paper Manufacturing Company Ltd.
    Inventors: Naoto Arai, Takeshi Murakami, Toshitake Suzuki, Toranosuke Saito, Masakatu Kitani, Takashi Ishibashi