Monofunctional Methacrylate Ink for Rapid Curing and Flexibility
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Solution Overview
Problem
Current ink compositions for ink jet recording that cure with high sensitivity and flexibility are lacking, as existing photopolymerizable compositions with low sensitivity require long exposure times, leading to image quality issues and durability problems due to cracking and peeling, especially on difficult-to-image supports.
Innovation Solution
An ink composition containing a monofunctional (meth)acrylate with a —CONH— bond, which enhances curing speed through hydrogen-bonding interactions between molecules, providing high sensitivity and flexibility without the drawbacks of multifunctional monomers, such as cracking and peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If photopolymerizable composition with low sensitivity is used, then safety and low skin irritation are achieved, but exposure time increases leading to image quality deterioration and vibration sensitivity
Solution Approach 1:
The patent changes the chemical parameters of the photopolymerizable composition by using monofunctional (meth)acrylates with specific molecular structures (Formulae I and II) that enable rapid polymerization. This allows achieving high sensitivity and short exposure times while maintaining safety and low skin irritation properties.
Solution Approach 2:
The patent creates a composite ink composition combining specific monofunctional (meth)acrylates (Formulae I and II) with photopolymerization initiators (Formula III). This composite formulation achieves both high sensitivity for rapid curing and low skin irritation, resolving the contradiction between safety and exposure time.
2Productivity
If multifunctional acrylate is used to improve sensitivity, then curing speed increases, but flexibility and impact resistance deteriorate causing cracking and peeling
Solution Approach 1:
The patent changes the functionality parameter from multifunctional to monofunctional (meth)acrylates, which prevents excessive cross-linking while maintaining rapid curing through efficient photopolymerization. This resolves the contradiction by achieving high curing speed without the brittleness and cracking associated with highly cross-linked structures.
Solution Approach 2:
The patent optimizes the molecular structure at the molecular level by designing specific monofunctional (meth)acrylate structures (Formulae I and II) that provide appropriate chain flexibility and intermolecular interactions, achieving both rapid curing and maintained flexibility without the drawbacks of multifunctional monomers.
3Reliability
If long exposure time is used for low sensitivity composition, then complete curing is achieved, but energy radiation increases causing heat generation
Solution Approach 1:
The patent changes the sensitivity parameter of the photopolymerizable composition by using monofunctional (meth)acrylates with specific molecular structures that enable rapid and complete curing with low energy radiation. This resolves the contradiction by achieving complete curing in short exposure times without excessive heat generation.
4Adaptability or versatility
If conventional ink composition is used for difficult-to-image supports, then ink bleeding occurs, but image quality deteriorates
Solution Approach 1:
The patent creates a specialized composite ink composition combining monofunctional (meth)acrylates (Formulae I and II) with photopolymerization initiators (Formula III) that provides rapid curing before ink bleeding occurs. This composite formulation achieves both compatibility with difficult-to-image supports and high image quality through precise droplet placement and immediate polymerization.
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 rapid curing with high sensitivity and flexibility, forming durable images that resist cracking and peeling, suitable for ink jet recording and planographic printing plates, with improved adhesiveness and printing durability.
Implementation Method 1
enhances curing speed through hydrogen-bonding interactions between molecules
Implementation Method 2
An ink composition containing a monofunctional (meth)acrylate with a —CONH— bond, which enhances curing speed through hydrogen-bonding interactions between molecules, providing high sensitivity and flexibility
Data Source
AI summary
The present invention provides an ink composition including a polymerization initiator and a monofunctional (meth)acrylate having a —CONH— bond in the molecule thereof. The present invention also provides an ink jet recording method and a planographic printing plate producing method using the ink composition, and a planographic printing plate prepared by the planographic printing plate producing method.