Non-Aqueous Ink Jet Ink with Glycol Diether for Bronze Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing non-aqueous ink jet inks containing halogenated phthalocyanine pigments suffer from bronze color phenomenon, poor image quality, and inadequate scratch resistance and discharge stability due to high molecular planarity and aggregation.
Innovation Solution
Incorporating a pigment with a specific molecular structure represented by Formula (1) and a glycol diether solvent represented by Formula (2) into the ink composition, which suppresses molecular association and aggregation, enhancing image quality, scratch resistance, and discharge stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If halogenated phthalocyanine pigment with high molecular planarity is used, then green color is achieved, but bronze color phenomenon occurs and image quality deteriorates
Solution Approach 1:
The patent changes the chemical structure parameters of the phthalocyanine pigment by introducing specific substituents (carboxyl groups, hydroxyl groups, or carbonyl groups) at the beta positions of the isoindole units. This structural modification alters the molecular planarity and electronic properties, enabling the pigment to maintain green color chroma while suppressing the bronze color phenomenon that occurs with highly planar halogenated phthalocyanine pigments.
2Illumination intensity
If halogenated phthalocyanine pigment is used, then green color is achieved, but scratch resistance deteriorates
Solution Approach 1:
The patent modifies the molecular structure parameters of the pigment by adding functional groups (carboxyl, hydroxyl, or carbonyl groups) that increase molecular weight and reduce planarity. These structural changes improve the pigment's binding affinity to the substrate and enhance its mechanical strength, thereby achieving both green color and improved scratch resistance simultaneously.
3Illumination intensity
If halogenated phthalocyanine pigment is used, then green color is achieved, but discharge stability deteriorates
Solution Approach 1:
The patent changes the chemical parameters of the pigment molecule by introducing polar functional groups (carboxyl, hydroxyl, or carbonyl groups) that improve solubility and dispersibility in the ink vehicle. These modifications stabilize the pigment particles in the ink composition, preventing aggregation and ensuring consistent discharge performance, thereby achieving both green color and improved discharge stability.
Data Source
AI summary
A non-aqueous ink jet ink composition of the present disclosure includes a pigment represented by the following Formula (1) and an organic solvent, in which the organic solvent includes a glycol diether represented by the following Formula (2).In Formula (1), X's each independently represent a chlorine atom or a bromine atom; and the total number of bromine atoms for X is 6 or more.In Formula (2), R1 and R2 each independently represent an alkyl group having 1 or more and 7 or fewer carbon atoms; R3 represents an alkylene group having 1 or more and 3 or fewer carbon atoms; and m represents an integer of 1 or more and 7 or less.