Curable solid ink compositions

Abstract

A curable solid ink composition including a curable component, a non-curable component including an ethoxylated octylphenol derivative, a photoinitiator, and a colorant. The curable solid ink composition has a viscosity in the range of less than 10 cPs at 90° C., a shrinkage value of less than 3%, and a superior curing rate compared to existing curable solid ink compositions. The ethoxylated octylphenol derivatives may be prepared by reacting an ethoxylated octylphenol, a linear alcohol, and diisocyanates or polyisocyanates.

Description

technical field [0001] The present invention generally relates to a curable solid ink composition containing ethoxylated octylphenol derivatives and a method for preparing the same, the curable solid ink exhibits better performance than conventional solid phase change inks and curable solid inks Excellent cure rate, cold shrinkage, hardness and scratch resistance. Background technique [0002] Printing inks are often formulated according to the stringent performance requirements required by the target market application, as well as the desired properties. Whether for office printing or production printing, it is desirable to have a specific ink that produces a strong, long-lasting image under stressful conditions. [0003] In a typical piezoelectric inkjet printing device design, the image is applied by ejecting suitably colored ink during four to six rotations (incremental motion) of the substrate (image receiving member or intermediate transfer member) relative to the ink...

AI Technical Summary

Problems solved by technology

[0005] However, the use of crystalline waxes limits the printing methods used for conventional solid inks

For example, keep the print head at a temperature higher than 120°C during the printing process, which can cause some problems

At these high temperatures, dyes molecularly dissolved in the ink vehicle are often susceptible to undesired effects leading to poor ink performance, such as: photo-oxidation by light (resulting in poor lightfastness); thermal degradation (e.g. When the ink is heated to a temperature above 120°C, the fluorescent dye loses its fluorescence); the dye diffuses from the ink into paper or other substrates (resulting in poor image quality and print-through); the dye penetrates into other solvents in contact with the image (resulting in poor water / solvent fastness)

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