Ink Composition for Ink-Jet Recording with N-Vinylpyrrolidone Polymer
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Solution Overview
Problem
Conventional ink-jet recording methods face challenges with insufficient adhesion and film strength of cured films on non-water-absorptive recording media, such as plastic films, and poor discharge performance due to high ink viscosity and surface localization of polymer compounds.
Innovation Solution
An ink composition comprising a polymer compound with a repeating unit derived from N-vinylpyrrolidone and optionally N-vinylcaprolactam, a multifunctional thiol skeleton structure, and a polymerization initiator, which maintains low viscosity and enhances adhesion and film strength through efficient polymerization and cross-linking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an ink composition containing polymer compounds is used for ink-jet recording on non-water-absorptive recording media, then adhesion and film strength are improved, but ink viscosity increases and discharge performance deteriorates
Solution Approach 1:
The patent changes the chemical structure parameters of the polymer compound by introducing specific repeating units (Formula 1 and Formula 2) that balance adhesion properties with viscosity control. The polymer compound contains repeating units with specific functional groups that provide adhesion to non-water-absorptive media while maintaining low enough viscosity for ink-jet discharge
Solution Approach 2:
The ink composition uses a composite approach by combining the polymer compound with specific polymerizable compounds and polymerization initiators. This composite formulation allows the polymer to provide adhesion and film strength while the polymerizable components ensure proper flow characteristics and curing performance
2Strength
If polymer compound concentration is increased to improve film strength, then adhesion improves, but ink viscosity increases and recording speed decreases
Solution Approach 1:
The patent optimizes the concentration and molecular weight parameters of the polymer compound to achieve the desired film strength while maintaining recording speed. The specific repeating units in the polymer structure provide high adhesion efficiency, allowing lower concentrations to be used compared to conventional polymers, thus maintaining fast recording speed
3Strength
If conventional polymer compounds are used to improve adhesion, then film strength increases, but polymer compounds localize on the surface and discharge stability decreases
Solution Approach 1:
The patent changes the chemical composition parameters of the polymer by incorporating specific repeating units (Formula 1 and Formula 2) that prevent surface localization. These repeating units contain functional groups that ensure uniform distribution and stable discharge characteristics while maintaining film strength
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 stable discharge and excellent adhesion and film strength on various recording media, maintaining low viscosity and improving the quality of recorded images.
Implementation Method 1
A polymerizable composition, which includes a polymerization initiator and a polymerizable compound, and which cures through polymerization of the polymerizable compound accelerated by an active species generated from the polymerization initiator by application of an energy
Data Source
AI summary
A polymerizable composition includes: a polymer compound; a polymerization initiator; and a polymerizable compound. The polymer compound contains at least one of a repeating unit represented by the following Formula (1) or a repeating unit represented by the following Formula (2). An ink composition for ink-jet recording includes the polymerizable composition. A method of ink-jet recording and a printed article use the ink composition.