Active-Energy-Ray-Curable Composition Suppressing Component Migration
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Solution Overview
Problem
Active-energy-ray-curable compositions used in printing face challenges with migration of components from cured materials, particularly when used on food packages and rigid containers, which poses safety concerns due to the potential extraction of harmful substances.
Innovation Solution
An active-energy-ray-curable composition incorporating a compound represented by General Formula (I), along with a radically polymerizable compound and a polymerization initiator, which suppresses migration and enhances hardness, ensuring safety and adhesiveness while maintaining low odors and scratch resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional active-energy-ray-curable compositions are used for printing on food packages and rigid containers, then drying ability and adhesiveness are improved, but migration of components from cured material occurs causing safety concerns
Solution Approach 1:
The patent changes the chemical parameters of the curable composition by incorporating specific compounds (General Formula I with heteroatom-containing substituents, Structural Formulas II-VII) that modify the polymerization behavior and final cured material structure. This results in reduced migration of components while maintaining safety for food package applications.
Solution Approach 2:
The patent creates a composite curable composition combining multiple components: the specific compound of General Formula (I), radically polymerizable compounds, and polymerization initiators. This composite approach achieves both low migration and high safety by synergistic interaction of components that suppress extractables while ensuring complete curing.
2Reliability
If the composition is designed to suppress migration, then safety is improved, but hardness and scratch resistance may be compromised
Solution Approach 1:
The patent optimizes the molecular structure parameters of the curable compound (General Formula I) to achieve a balance between safety and mechanical properties. The specific structural features (heteroatom-containing groups, polyvalent alcohol residues) control both migration suppression and network formation that provides hardness and scratch resistance.
Solution Approach 2:
The composite formulation combines the specific curable compound with radically polymerizable compounds and polymerization initiators to create a crosslinked network structure. This composite system achieves both low extractables (safety) and high mechanical strength (hardness, scratch resistance) through synergistic polymerization and network formation.
3Reliability
If the composition uses conventional components, then adhesiveness to substrate is achieved, but odors and residual monomers increase reducing safety
Solution Approach 1:
The patent modifies the chemical parameters by using compounds with specific molecular structures (General Formula I with polyvalent alcohol residues and heteroatom-containing groups) that enable complete polymerization. This reduces residual monomers and volatile odorous components while maintaining safety for food contact applications.
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 composition effectively reduces the migration of components from the cured material, enhancing safety and adhesiveness, while maintaining excellent hardness and scratch resistance, making it suitable for applications on food packages and rigid containers.
Implementation Method 1
An active-energy-ray-curable composition includes a compound represented by General Formula (I)... and a polymerization initiator
Implementation Method 2
Because an active-energy-ray-curable composition is cured by irradiation of active energy rays
Data Source
AI summary
To provide an active-energy-ray-curable composition including a compound represented by General Formula (I) below:where in the General Formula (I), R is hydrogen or a methyl group; A is a structure expressed by one selected from the group consisting of Structural Formulas (II) to (VII) below, each of which may have a substituent such as an alkyl group or an alkoxy group, or both; j and k in the Structural Formulas (VI) and (VII) are an integer of 0 or more; X denotes a substituent including a heteroatom; n is an integer of 0 or more, m is an integer of 1 or more, and n+m is 3 or more, or n is an integer of 0 and m is an integer of 2; and wavy lines in the Structural Formulas (II) to (VII) each independently denote a bond with X or a (meth)acryloyl group (H2C═CR—C(═O)—):