Home > About Us > Technology > Technical Report > Technical Report No.23 2014

Development of a Novel Value-added Pigment That Balances Invisibility and Infrared Absorbability

In order to realize the concept of invisible printing that is effective for embedding data and ensuring security, we searched for a molecular group that achieves both high infrared absorbability and excellent transparency in the visible region. From a number of dye candidates, we selected perimidine-based squarylium dyes having the features of intramolecular polarization and linearity. In order to optimize the required levels of performance, we introduced various alkyl substituents onto the backbone structure of this dye molecule and evaluated their performance. As a result, we found that a substituent with a specific sterically branched structure can greatly enhance molecular crystallinity. This substituent also contributed significantly to the synthetic yield and improved lightfastness of the target molecule that was achieved as a pigment capable of practical use.

Author

  • Minquan Tian
    Marking Materials Research & Development, Marking Materials Technology Group
  • Yuka Goto
    Marking Materials Research & Development, Marking Materials Technology Group
  • Makoto Furuki
    Marking Materials Research & Development, Marking Materials Technology Group
  • Suguru Nakaso
    Marking Materials Research & Development, Marking Materials Technology Group
  • Shinji Hasegawa
    Marking Materials Research & Development, Marking Materials Technology Group