Electron beam curable inkjet formulation with improved adhesion
AssigneeSun Chemical Corporation
InventorsStephen Anthony HALL, Derek Ronald ILLSLEY
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Abstract
The present invention provides a method for printing energy curable ink and coating compositions that comprise high amounts of multifunctional monomers, achieving cured inks and coatings that exhibit good adhesion to plastic substrates, good resistance when cured, and low amounts of uncured, migratable monomers. The method of the present invention employs electron beam curing of the ink and coating compositions, at accelerating voltages greater than or equal to 70 keV, and electron beam doses greater than or equal to 30 kGy, and preferably greater than or equal to 40 kGy.
Claims36
A method for printing an energy curable ink or coating composition comprising:
- a) providing an energy curable ink or coating composition, wherein the energy curable ink or coating composition comprises:
- i) greater than or equal to 20% (w/w) one or more multifunctional polymerizable monomers, based on the total weight of the ink or coating composition;
- ii) optionally, one or more solvents;
- and
- iii) optionally, one or more colorants;
- b) applying the energy curable ink or coating composition of step a) to a substrate;
- c) curing the applied energy curable ink or coating composition by electron beam radiation, wherein:
- i) the accelerating voltage of the electron beam emitter is greater than or equal to 70 keV;
- and
- ii) the cure dose is greater than or equal to 30 kGy.
Dependencies are inferred from the claim text.