Carbon Black Dispersion Using Polyamic Acid
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Solution Overview
Problem
Conventional methods for manufacturing carbon black dispersion often result in poor dispersion efficiency and prolonged processing times, leading to carbon black compositions with inadequate thermal resistance due to the use of dispersants with low thermal stability.
Innovation Solution
The use of polyamic acid in a solvent containing N,N,N',N'-tetramethyl urea to disperse carbon black, achieving a high carbon black content of 50 to 99% by mass, which enhances thermal resistance and dispersion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional dispersants are used to disperse carbon black in organic solvents, then carbon black can be dispersed, but the dispersion efficiency is poor and processing time is extended
Solution Approach 1:
The invention changes the chemical parameters of the dispersant system by using polyamic acid with specific functional groups instead of conventional dispersants. This parameter change enables faster dispersion kinetics and improved dispersion efficiency while reducing processing time
Solution Approach 2:
The invention creates a composite dispersant system combining polyamic acid with specific functional groups that work synergistically to disperse carbon black. This composite approach achieves both high dispersion efficiency and reduced processing time
2Reliability
If conventional dispersants with low thermal stability are used, then carbon black dispersion can be achieved, but the resulting composition has poor thermal resistance
Solution Approach 1:
The invention changes the thermal stability parameter of the dispersant by selecting polyamic acid which inherently possesses high thermal resistance. This parameter change ensures the final composition maintains excellent thermal resistance while remaining easy to manufacture
Solution Approach 2:
The invention replaces conventional dispersants that require careful thermal management with polyamic acid that inherently withstands high temperatures, simplifying the manufacturing process and improving product reliability
3Quantity of substance
If carbon black content is increased to achieve desired black density, then coloring performance improves, but dispersion difficulty increases
Solution Approach 1:
The invention changes the interfacial parameters between carbon black and dispersant by using polyamic acid with specific functional groups. This parameter change allows high carbon black content (50-99% by mass) to be achieved while maintaining easy dispersion and avoiding aggregation
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
This method provides a carbon black dispersion with improved thermal resistance and faster dispersion times, resulting in a black composition with desired density and stability, suitable for various applications including ink and resin compositions.
Implementation Method 1
dispersing carbon black by using polyamic acid in a solvent containing N,N,N’,N’-tetramethyl urea
Data Source
AI summary
The problem to be solved by the present invention is: to provide a carbon black dispersion containing well-dispersed carbon black and giving a black composition superior in thermal resistance; to provide a black composition giving a black shaped body which is colored in black of a desired density and superior in thermal resistance; and to provide a dispersion method of carbon black that allows preferable dispersion of carbon black in a short period of time, and preparation of a carbon black dispersion that gives a black composition superior in thermal resistance. In order to solve the above described problems, carbon black is dispersed in a solvent containing N,N,N',N'-tetramethyl urea, by using polyamic acid.