Sensient's Suite of Self-Dispersed Color Nano Particle Dispersions - 1,3,5-Triazine Derivatives as Versatile Intermediates for Attachment on Pigments
Abstract:Small organic molecules such as sulfanilic acid and 4- aminobenzoic acid are directly attached to the pigment surface by a process involving cyanuric chloride and the corresponding amino acid. The intermediate, a substituted amino-1,3,5-triazine derivatives undergo facile disproportionation when treated with a radical initiator (potassium persulfate) and facilitate the attachment of the organic molecules on the pigment surface. The surface modification achieved by this process is as versatile as the well established diazonium decomposition pathway without the low pH requirement and the potential explosion hazards.
This process can be expanded to attach small molecular weight polymers containing an amino end group – examples are poly(ethoxy, propoxy)amines such as Surfonamines. The radical pathway can be exploited to attach other polymers such as poly (styrene-co-maleic anhride) or SMA resins. The ability to attach groups at neutral and basic pH can be exploited to include resin stabilized nano dispersions as the pigment source and skip the milling step usually associated with such a process. This attachment methodology enables customization of pigment surfaces to suit a broad range of applications and ink requirements.
Document Type: Research Article
Publication date: January 1, 2009
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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