Water-Based Ink Jet Ink Composition with Dispersing Resin and HEP
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Solution Overview
Problem
Water-based ink jet inks containing Pigment Yellow 150 without dispersing resins exhibit low abrasion resistance and poor recovery from clogging due to pigment exposure and difficulty in redispersing the ink.
Innovation Solution
Incorporating a dispersing resin and N-hydroxyethylpyrrolidone (HEP) into the ink composition to enhance pigment dispersion and improve clogging recovery by forming a smooth surface and allowing easy redispersion of the resin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a dispersing resin is used to improve pigment dispersion and abrasion resistance, then abrasion resistance is improved, but recovery from clogging deteriorates due to difficulty in redispersing the ink
Solution Approach 1:
The patent changes the chemical parameters of the dispersing resin by introducing specific functional groups (carboxyl, hydroxyl, or amine groups) and controlling the molecular weight and composition ratios. This modifies the resin's dispersing capability and redispersion characteristics, enabling both abrasion resistance and recovery from clogging to be improved simultaneously.
Solution Approach 2:
The patent creates a composite dispersing system combining multiple components: dispersing resin containing specific functional groups, pigment particles, and auxiliary agents. This composite formulation achieves synergistic effects where the resin provides abrasion resistance while the controlled composition enables easy redispersion for clogging recovery.
2Ease of manufacture
If surfactant is used instead of dispersing resin, then ease of manufacture is improved, but abrasion resistance deteriorates due to pigment exposure
Solution Approach 1:
The patent introduces a dispersing resin as an intermediary substance between the pigment and the aqueous medium. This resin forms a protective coating around pigment particles, preventing pigment exposure and improving abrasion resistance, while still maintaining ease of manufacture through straightforward dispersion processes.
3Strength
If dispersing resin is used to improve pigment dispersion, then abrasion resistance is improved, but storage stability deteriorates due to ink drying and difficulty in redispersion
Solution Approach 1:
The patent optimizes the chemical parameters of the dispersing resin, including the introduction of specific functional groups (carboxyl, hydroxyl, amine) and control of molecular weight and composition ratios. These parameter changes enhance the resin's flexibility and redispersion capability, preventing ink from drying solidly and maintaining storage stability while preserving abrasion resistance.
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 abrasion resistance and recovery from clogging, maintaining light fastness and storage stability with the synergy between the dispersing resin and HEP.
Implementation Method 1
N-hydroxyethylpyrrolidone has the ability to dissolve resins; the dissolved resin for dispersion covers the pigment, forming a smooth record surface that improves the abrasion resistance of the ink coating
Implementation Method 2
a dispersing resin... to enhance pigment dispersion and improve clogging recovery by forming a smooth surface
Data Source
AI summary
A water-based ink jet ink composition contains Pigment Yellow 150, a dispersing resin, and N-hydroxyethylpyrrolidone.