| 摘要 |
The invention detailed herein comprises a family of multifunctional acrylate oligomers which are useful as pigment grinding vehicles for use in radiation-curable coating formulations. The multifunctional acrylate resins are formed by the reaction of acrylate monomers and oligomers with beta-keto esters (e.g., acetoacetates), beta-diketones (e.g., 2,4-pentanedione), beta-keto amides (e.g., acetoacetanilide, acetoacetamide), and/or other beta-dicarbonyl compounds or Michael "donors" that can participate in the Michael addition reaction. These resin vehicles have a built-in chromophore that enables ink formulations made from their dispersions to cure under standard UV-cure conditions with significantly less photoinitiator than commercial formulations. The resins also exhibit excellent pigment wetting characteristics and can be designed to function as a single dispersion vehicle for different pigments and different ink applications such as screen, flexographic, and lithographic printing.
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