UV-Curable Ink Jet Composition for Enhanced Curing and Stability

The patent applies parameter changes by carefully controlling the molecular weight (500-5000) and functional group content (0.5-30 mass%) of the (meth)acrylated amine compound, as well as the hindered amine compound content (0.05-3 mass%). These parameter optimizations resolve the contradiction by achieving excellent curability and storage stability through precise compositional control rather than adding complex processing systems.

The patent uses composite materials by combining monomer A with specific ratios of (meth)acrylated amine compound and hindered amine compound. This composite approach resolves the technical contradiction by creating a synergistic formulation where each component contributes to both curability and storage stability, eliminating the need for more complex device-level solutions.

The hindered amine compound acts as an intermediary that protects the photopolymerizable components from premature reaction during storage. By incorporating this stabilizing agent at 0.05-3 mass%, the patent enables high photopolymerizable compound content for fast curing while preventing degradation during storage, thus resolving the contradiction between curing efficiency and storage stability.

The patent applies beforehand cushioning by including the hindered amine compound in the ink formulation before storage. This compound provides prior protection against polymerization and degradation, allowing the ink to maintain stability during storage even with high photopolymerizable compound content, and then cure efficiently when exposed to UV light.