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A Pigment Precursor Based on Mono t-BOC Diketopyrrolopyrrole and its Thermal Regeneration into the Pigment

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Pyrrolopyrroles (DPP) are industrially important red pigments in paint and imaging areas. The title compound is a soluble precursor of DPP called mono-BOC DPP (“latent pigment”), in which one of the NH groups in DPP is replaced by a t-butoxycarbonyl (t-BOC) group to make it soluble in organic solvents. The regeneration and regenerated product of mono-BOC DPP have been studied in terms of thermogravimetric and X-ray diffraction analyses, as well as IR and diffuse reflectance spectra on powdered substances. Transformation from mono-BOC DPP to the parent DPP begins around 170°C and is completed around 220°C, accompanied by evolution of CO2. The crystal phase of thermally regenerated DPP is different from that of DPP, although the diffuse reflectance spectrum of regenerated DPP on powder is quite similar to that of commercial one.

Document Type: Research Article

Publication date: 2005-01-01

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  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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