Ink Jet Ink Composition with Hydroxy Monomers for Storage-Stable UV Curing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional ink jet ink compositions face issues with storage stability, including polymerization initiator precipitation under low-temperature conditions and foreign matter generation due to moisture under high-temperature conditions, along with insufficient curability and odor problems.
Innovation Solution
Incorporating ethyl phenyl (2,4,6-trimethylbenzoyl)phosphinate as a photopolymerization initiator and limiting the content of aromatic group-containing polymerizable compounds and water in the ink composition, along with the use of hydroxy group-containing monomers, to enhance storage stability and curability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ink jet ink composition is used, then the ink can be ejected and recorded, but polymerization initiator precipitates under low-temperature conditions causing storage instability
Solution Approach 1:
The patent changes the chemical parameters of the ink composition by specifying precise ranges: photopolymerization initiator content of 0.1-10 mass%, hydroxy group-containing monomer of 10-80 mass%, and limiting aromatic group-containing polymerizable compounds to 0-5 mass%. These parameter adjustments prevent initiator precipitation while maintaining curability.
Solution Approach 2:
The patent creates a composite ink composition system combining multiple components with specific functions: photopolymerization initiator for curing, hydroxy group-containing monomer for polymerization and crosslinking, and controlled amounts of aromatic group-containing polymerizable compounds. This composite formulation ensures compatibility and prevents precipitation.
2Reliability
If conventional ink jet ink composition is used, then the ink can be recorded, but foreign matter is generated under high-temperature conditions due to moisture
Solution Approach 1:
The patent adjusts the chemical composition parameters to limit water content to 0-2 mass% and control aromatic group-containing polymerizable compounds to 0-5 mass%. This parameter optimization prevents moisture-related foreign matter generation during high-temperature storage while preserving ink recording functionality.
3Reliability
If conventional ink jet ink composition is used, then the ink can be applied, but curability is insufficient
Solution Approach 1:
The patent optimizes the concentration parameters of curable components: photopolymerization initiator at 0.1-10 mass% and hydroxy group-containing monomer at 10-80 mass%. These parameter adjustments ensure sufficient curability while maintaining ease of application and storage stability.
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 solution prevents polymerization initiator precipitation, reduces odor, and suppresses foreign matter generation, thereby improving the ink's storage stability and curability under varying temperature conditions.
Implementation Method 1
the ink composition is cured temporarily and has excellent storage stability
Data Source
AI summary
An ink jet ink composition includes a polymerization initiator and a hydroxy group-containing monomer, contains no aromatic group-containing polymerizable compound, or contains an aromatic group-containing polymerizable compound in an amount of 5.0 mass % or less based on the total amount of the ink jet ink composition, and contains no water, or contains water in an amount of less than 2 mass % based on the total amount of the ink jet ink composition, wherein the polymerization initiator includes ethyl phenyl (2,4,6-trimethylbenzoyl)phosphinate.