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US 11,236,243 B2Granted
Low migration energy curable inks
AssigneeSun Chemical Corporation
InventorsMathew C. Mathew, David Biro
Life of this patent
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Abstract
The present invention provides energy curable ink and coating compositions that comprise polymerizable compounds, photoinitiators, and colorants. The polymerizable compounds comprise one or more polymerizable monomers and/or oligomers, wherein at least a portion is 3-methyl-1,5-pentanediol diacrylate. The inks and coatings of the invention exhibit excellent print properties after UV-LED, standard UV mercury vapor lamp, and electron beam cure.
Claims12
An energy curable ink or coating composition, comprising:
- a) a polymerizable compound, wherein the polymerizable compound comprises:
- i. one or more polymerizable ethylenically unsaturated monomers and/or oligomers;
- ii. wherein 2 wt % to 40 wt % is 3-methyl-1,5-pentanediol diacrylate, based on the total weight of the polymerizable monomers and/or oligomers;
- b) 8 wt % to 16 wt % one or more photoinitiators, based on the total weight of the ink or coating composition;
- and
- c) 8 wt % to 24 wt % one or more colorants, based on the total weight of the ink or coating composition;
- and
- d) 0.1 wt % to 5 wt % of an optical brightening agent, based on the total weight of the ink or coating composition, wherein the optical brightening agent is a UV sensitizer;
- wherein the ink or coating composition comprises less than 2 wt % organic solvent, based on the total weight of the ink or coating composition;
- and wherein the ink or coating composition is curable by UV-LED radiation.
7 more elements
Dependencies are inferred from the claim text.