UV-Curable Water-Based Ink Composition for Scratch-Resistant Printing
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Solution Overview
Problem
Existing UV-curable water-based inks lack balanced performance in coating film strength, scratch resistance, and substrate versatility, making them unsuitable for large-area or outdoor printed articles.
Innovation Solution
A UV-curable water-based ink formulation incorporating a UV-curable oligomer and a water-soluble polyfunctional (meth)acrylamide compound, with specific structural units and functional groups, enhances coating film performance and substrate versatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water-based ink is used, then environment safety and image quality are improved, but coating film strength and scratch resistance deteriorate
Solution Approach 1:
The patent uses a composite ink formulation combining water-based medium with UV-curable oligomer and polyfunctional (meth)acrylamide compound. This composite approach allows the ink to maintain environmental safety and image quality while achieving enhanced coating film strength and scratch resistance through the synergistic effect of multiple components.
Solution Approach 2:
The patent modifies the chemical parameters of the ink formulation by introducing specific UV-curable oligomers and polyfunctional (meth)acrylamide compounds with defined molecular weights and functional group contents. These parameter changes enable the ink to achieve both environmental safety and improved mechanical properties like coating film strength and scratch resistance.
2Reliability
If water-based ink is used, then environment safety is improved, but substrate versatility deteriorates
Solution Approach 1:
The patent develops a universal water-based ink formulation that can be applied to multiple substrate types including plastics, metals, and glass. The ink achieves this through its balanced composition of water-based medium, UV-curable oligomer, and polyfunctional (meth)acrylamide compound, which together provide both environmental safety and broad substrate compatibility.
3Ease of manufacture
If conventional water-based ink is used, then ease of manufacture is maintained, but coating film performance and scratch resistance deteriorate
Solution Approach 1:
The patent optimizes the parameters of the ink formulation by specifying particular UV-curable oligomers and polyfunctional (meth)acrylamide compounds with controlled molecular weights and functional group contents. These parameter adjustments enhance coating film performance and scratch resistance while maintaining ease of manufacture through straightforward inkjet printing processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The ink achieves improved scratch resistance and substrate versatility, ensuring high-quality prints on various surfaces, particularly suitable for large-area and outdoor applications.
Implementation Method 1
a UV-curable water-based ink including at least a UV-curable oligomer, a colorant, and a water-soluble polyfunctional (meth)acrylamide compound
Data Source
AI summary
Provided is a UV-curable water-based ink excellent in coating film performance, especially scratch resistance, and further also excellent in substrate versatility. The UV-curable water-based ink includes at least a UV-curable oligomer, a colorant, and a water-soluble polyfunctional (meth)acrylamide compound, in which the UV-curable oligomer has a structural unit derived from a water-soluble compound and a structural unit derived from a compound containing two or more polymerizable unsaturated bonds. Alternatively, the UV-curable water-based ink is configured such that the UV-curable oligomer has a structural unit derived from a compound containing four or more polymerizable unsaturated bonds and capable of bonding with a polyisocyanate compound (A), or the UV-curable water-based ink is configured such that the UV-curable oligomer has a structural unit derived from a compound represented by the following formula (1). (In formula (1), X is an alkylene group, Y is a (meth)acryloyl group, an allyl group, or an acyl group, and n is an integer of 2 or more.)