Amine-Modified Oligomer Ink Composition for Stability and Curability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Actinic radiation-curable inkjet inks face challenges in storage stability and curability, particularly with amine-modified oligomers being highly reactive, and existing solutions do not adequately address these issues while maintaining image quality.
Innovation Solution
An actinic radiation-curable inkjet ink composition comprising a curable monomer, photopolymerization initiator, amine-modified oligomer, pigment, and polymer dispersant with a tertiary amine group, along with a gelling agent that undergoes sol-gel phase transition, optimizing the content of these components for enhanced stability and curability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If amine-modified oligomer is used as a reactive component in actinic radiation-curable inkjet ink, then curability is improved, but storage stability deteriorates due to high reactivity
Solution Approach 1:
The patent introduces a polymer dispersant containing a tertiary amine group as an intermediary substance that mediates between the amine-modified oligomer and other ink components. The tertiary amine group in the polymer dispersant interacts with the amine-modified oligomer to suppress its excessive reactivity during storage, while still allowing it to function properly during curing. This intermediary substance resolves the contradiction by providing a chemical environment that stabilizes the reactive oligomer without compromising its curability.
Solution Approach 2:
The patent optimizes the content ratio of amine-modified oligomer to polymer dispersant containing tertiary amine group within specific ranges (0.5-10 mass% oligomer and 20-70 mass% dispersant relative to pigment). By controlling these parameter values, the system achieves a balance where the oligomer remains sufficiently reactive for curing while being stabilized against premature reaction during storage. The specific parameter optimization resolves the contradiction between curability and storage stability.
2Stability of the object's composition
If polymer dispersant containing tertiary amine group is added to suppress reactivity of amine-modified oligomer, then storage stability is improved, but curability may deteriorate
Solution Approach 1:
The patent establishes specific content ranges for both the amine-modified oligomer (0.5-10 mass%) and the polymer dispersant containing tertiary amine group (20-70 mass% relative to pigment). Within these optimized parameter ranges, the system achieves simultaneous improvement in storage stability and maintenance of curability. The precise parameter control ensures that the polymer dispersant stabilizes the oligomer during storage without excessively suppressing its reactivity during the curing process.
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 composition achieves improved storage stability and curability, while preventing blooming and maintaining image quality, even with prolonged storage and bending resistance.
Implementation Method 1
an ink component can be cured by polymerizing the photocurable compound through irradiation with actinic radiation such as ultraviolet rays
Implementation Method 2
a gelling agent, wherein the actinic radiation-curable inkjet ink composition undergoes sol-gel phase transition by the change in temperature
Data Source
AI summary
The purpose of the present invention is to provide an active light ray-curable inkjet ink composition which exhibits excellent curing properties and high storage stability. This active light ray-curable inkjet ink composition contains a curable monomer, a photopolymerization initiator, an amine-modified oligomer, a pigment and a polymer dispersing agent. In this composition, the content of the amine-modified oligomer is 0.5-10 mass % relative to the overall mass of the active light ray-curable inkjet ink composition, the polymer dispersing agent is a compound which adsorbs the pigment and contains a tertiary amine group as a functional group, and the content of the polymer dispersing agent is 20-70 mass % relative to the pigment.