ELECTRON BEAM-CURABLE INKJET INKS AND USE THEREOF IN INKJET PRINTING METHODS
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Abstract
An inkjet ink which is electron beam curable includes 10 to 40 wt.-% of at least one oligomer based on a total weight of the inkjet ink, 5 to 25 wt.-% of at least one reactive thinner based on the total weight of the inkjet ink, 25 to 84 wt.-% of a solvent mixture comprising at least two solvents based on the total weight of the inkjet ink, and 1 to 15 wt.-% of at least one pigment based on the total weight of the inkjet ink. The at least two solvents have a boiling point of from 50 to 300° C., a dielectricity constant of from 5 to 20, and an evaporation rate of 3 to 5000. The evaporation rate of the at least two solvents differs by a factor of from 2 to 10. The inkjet ink is free from photoinitiators.
12 Citations
31 Claims
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1-15. -15. (canceled)
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16. An inkjet ink which is electron beam curable, the inkjet ink comprising:
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10 to 40 wt.-% of at least one oligomer based on a total weight of the inkjet ink; 5 to 25 wt.-% of at least one reactive thinner based on the total weight of the inkjet ink; 25 to 84 wt.-% of a solvent mixture comprising at least two solvents based on the total weight of the inkjet ink, the at least two solvents having a boiling point of from 50 to 300°
C., a dielectricity constant of from 5 to 20, and an evaporation rate of 3 to 5000, wherein the evaporation rate of the at least two solvents differs by a factor of from 2 to 10; and1 to 15 wt.-% of at least one pigment based on the total weight of the inkjet ink; wherein, the inkjet ink is free from photoinitiators. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A method for producing a color coat on a substrate surface, the method comprising:
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providing at least one inkjet ink which is free of photoinitiators, the at least one inkjet ink comprising, 10 to 40 wt.-% of at least one oligomer based on a total weight of the inkjet ink, 5 to 25 wt.-% of at least one reactive thinner based on the total weight of the inkjet ink, 25 to 84 wt.-% of a solvent mixture comprising at least two solvents based on the total weight of the inkjet ink, the at least two solvents having a boiling point of from 50 to 300°
C., a dielectricity constant of from 5 to 20, and an evaporation rate of 3 to 5000, wherein the evaporation rate of the at least two solvents differs by a factor of from 2 to 10, and1 to 15 wt.-% of at least one pigment based on the total weight of the inkjet ink, applying the at least one inkjet ink on the substrate surface with an inkjet technology; and hardening the at least one inkjet ink by exposing the at least one inkjet ink applied to a dose of an electron radiation in the range of 10 to 200 kGy. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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Specification