Charge Control Agent Manufacturing via Ion Exchange
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Solution Overview
Problem
Current charge control agents with azo-type metal complex salts and ammonium ions have insufficient electrification properties due to low ammonium ion content, making it difficult to manufacture them at high purity and high content efficiently.
Innovation Solution
A method involving an initiative chelating step with a monoazo compound and a trivalent metal chelating agent, followed by an ion-exchanging step using an ammonium counter ion forming agent, such as inorganic ammonium salts and aqueous ammonia, to produce an azo-type metal complex salt with a high ammonium ion content, ensuring high purity and efficient manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ammonium counter ion content in the azo-type metal complex salt is increased to improve electrification properties, then the electrification properties are improved, but the manufacturing purity decreases
Solution Approach 1:
The manufacturing process is divided into two distinct stages: first, synthesis of the azo-type metal complex salt with controlled counter ions; second, ion exchange to introduce ammonium counter ions. This segmentation allows each stage to be optimized independently, achieving both high purity and high ammonium content.
Solution Approach 2:
A intermediate azo-type metal complex salt with controlled counter ions is used as a bridge to achieve the final high-purity ammonium-containing product. The intermediate compound serves as a pure starting material for the ion exchange step, enabling precise control over the final composition.
2Speed
If the ammonium counter ion content is increased to achieve fast and stable electrification, then the electrification speed and stability are improved, but the manufacturing efficiency and simplicity deteriorate
Solution Approach 1:
The invention changes the chemical parameters of the counter ion composition by introducing ammonium ions through controlled ion exchange. This parameter change enables fast and stable electrification while maintaining manufacturing efficiency through a straightforward two-step process.
3Ease of manufacture
If conventional methods are used to manufacture azo-type metal complex salts with ammonium counter ions, then the process is simple, but the ammonium ion content remains low causing insufficient electrification properties
Solution Approach 1:
The azo-type metal complex salt is first synthesized with controlled counter ions in a clean, simple process. Then, ammonium counter ions are introduced via ion exchange. This preliminary action ensures both manufacturing simplicity and high electrification properties.
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 method results in a charge control agent with excellent electrification properties, enabling fast and stable electrification of toners, suitable for both high-speed and low-speed electrostatic image development, and vivid image formation with high resolution.
Implementation Method 1
an initiative chelating step by reacting with a monoazo compound represented by the following chemical formula [1] and a trivalent metal chelating agent preferably an iron chelating agent, to prepare an azo-type metal complex salt intermediate
Implementation Method 2
a subsequent ion-exchanging step by reacting with the azo-type metal complex salt intermediate and an ammonium counter ion forming agent including an inorganic ammonium salt and aqueous ammonia to prepare an azo-type metal complex salt having an ammonium ion of a counter ion
Data Source
AI summary
A method for manufacturing a charge control agent comprising steps of:an initiative chelating step by reacting with a monoazo compound represented by the following chemical formula [1](in the chemical formula [1], —Ar1— and —Ar2— are aromatic groups) and a metal chelating agent to prepare an azo-type metal complex salt intermediate;a subsequent ion-exchanging step by reacting with the azo-type metal complex salt intermediate and an ammonium counter ion forming agent including an inorganic ammonium salt and aqueous ammonia to prepare an azo-type metal complex salt having an ammonium ion of a counter ion represented by the following chemical formula [2](in the chemical formula [2], —Ar1— and —Ar2— are the same as the chemical formula [1]; M is a trivalent metal; B+ is a cation except an ammonium ion; n is from 0.70 to 1.00).