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Reactive Silanes in Cationic UV Jet-inks

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Cationic UV jet-inks offer many desirable features. This includes, strong adhesion to a range of media, fast cure response in air and low residual odour. Despite this, there remains the need for greater formulation diversity, mainly due to limited raw material supply and viscosity restrictions. For example, the creation of very hard, scratch and chemical resistant films, whilst maintaining a low ink viscosity, is somewhat challenging.

Silane chemistry has been used in the coatings industry for many years to provide hard films with high heat and solvent resistance. A large number of these reactive silanes are low enough in viscosity to be attractive to the jet-ink formulator. But due to a cumbersome reaction process, involving heat, hydrolysis and condensation, the inclusion of such materials has been limited.

This paper looks at how silane chemistry may be incorporated into cationic UV jet-inks. Through photoinitiation, the silane curing mechanism is simplified to a one-step process. By doing so, formulation latitude is increased and improvements to film properties are made.

Document Type: Research Article

Publication date: 2007-01-01

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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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