Water-Based Ink Dye with CN-Bond Structure for Light and Ozone Resistance
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Solution Overview
Problem
Conventional water-based inks for ink-jet recording lack superior light resistance, ozone resistance, and storage stability simultaneously.
Innovation Solution
A water-based ink comprising a dye with a specific CN-bond structure, such as aliphatic alcohol amine, which stabilizes the dye and maintains a pH range of 8.0 to 11.0, enhancing storage stability and resistance to light and ozone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional water-based ink formulations are used, then the ink can be stored for long periods, but the recorded object shows poor light resistance and ozone resistance
Solution Approach 1:
The patent modifies the chemical structure of the dye by introducing a cyano group at the position ortho to the hydroxyl group on the phenolic ring. This structural parameter change enhances both the storage stability and the resistance to light and ozone degradation, resolving the contradiction between long-term stability and environmental resistance.
Solution Approach 2:
The invention creates a composite molecular structure combining specific dye components with improved chemical stability. The dye comprises a phenolic compound with a cyano group at the ortho position relative to the hydroxyl group, forming a composite structure that simultaneously achieves storage stability and resistance to light and ozone degradation.
2Device complexity
If conventional dyes are used in water-based ink, then the ink formulation is simple, but the ink lacks superior toughness including light resistance, ozone resistance, and storage stability simultaneously
Solution Approach 1:
The patent introduces a specific structural parameter - a cyano group at the ortho position to the hydroxyl group on the phenolic ring. This single structural modification enhances multiple performance aspects (storage stability, light resistance, ozone resistance) without significantly complicating the overall ink formulation, thus resolving the contradiction between formulation simplicity and comprehensive toughness.
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 achieves improved storage stability, light resistance, and ozone resistance, as demonstrated by reduced absorbance change rates and OD value change rates in evaluation tests.
Implementation Method 1
The coloring agent comprises a dye represented by the following general formula (1), and the ink further comprises a substance having a structure in which a carbon atom and a nitrogen atom are covalently bound (CN-bond structure-comprising substance)
Implementation Method 2
X1 and X2 each represent an electron attractive group, and X1 and X2 may be the same or different
Data Source
AI summary
The present invention provides a water-based ink for ink-jet recording containing a coloring agent and water. The coloring agent contains a dye represented by the following general formula (1). The ink further includes a substance having a structure in which a carbon atom and a nitrogen atom are covalently bound.