Non-pigmented Dispersant Composition for Low Viscosity
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Solution Overview
Problem
Existing pigment dispersion compositions for applications like liquid crystal displays and inkjet printing face issues with unsatisfactory wetting and dispersing agents, leading to high viscosity and instability, which affect contrast and productivity, and require compatibility with various components and solvents.
Innovation Solution
A non-pigmented composition comprising a block co-polymer with specific repeating units and a polymer having acidic groups, used as a dispersing agent to improve pigment dispersion quality and stability, ensuring low viscosity and broad compatibility with different components and solvents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional wetting and dispersing agents are used in pigment dispersions, then pigment dispersion can be achieved, but the viscosity increases and storage stability deteriorates
Solution Approach 1:
The patent changes the chemical parameters of the dispersing agent by using a block copolymer with specific repeating units (containing ether groups and/or hydroxyl groups) combined with a polymer having acidic groups. This chemical parameter change enables the dispersing agent to maintain low viscosity while providing effective pigment dispersion and storage stability, resolving the contradiction between viscosity and stability.
Solution Approach 2:
The patent employs a composite dispersing system combining a block co-polymer (with specific structural blocks containing ether and hydroxyl groups) and a polymer with acidic groups. This composite material approach allows the system to achieve both low viscosity and high storage stability through the synergistic effects of the different polymer components working together.
2Productivity
If pigment loading is increased to improve productivity, then output increases, but the amount of wetting and dispersing additive required increases, affecting compatibility and developing properties
Solution Approach 1:
The patent develops a universal dispersing agent system that maintains broad compatibility across different pigment types, resins, and solvents even at high pigment loadings. The block copolymer with acidic group-containing polymer provides multi-functional performance: effective dispersion, maintained solubility in organic solvents like 1-Methoxy-2-propyl acetate, and compatibility with various formulation components, allowing high productivity without sacrificing adaptability.
3Manufacturing precision
If dispersing agent amount is increased to improve dispersion quality, then pigment dispersion improves, but viscosity increases and contrast is impaired
Solution Approach 1:
The patent optimizes the concentration parameters of the dispersing agent by using a highly efficient block copolymer system with specific repeating units. This parameter optimization allows achieving excellent dispersion quality at low additive concentrations, preventing viscosity increase and maintaining contrast, thus resolving the contradiction between dispersion quality and viscosity.
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 composition effectively reduces viscosity and enhances storage stability of pigment concentrates, maintaining high productivity and compatibility with various components, thereby improving the quality of color filters and coatings.
Implementation Method 1
The invention relates to a composition comprising a block co-polymer and a polymer having acidic groups... The composition is very suitable as a dispersing agent for colorants... effectively reduces viscosity and enhances storage stability
Data Source
AI summary
The invention relates to a non-pigmented composition comprising a) a block co-polymer comprising at least one first block and at least one second block which is different from the first block, wherein the first block comprises repeating units 1, repeating unit 1 and the second block comprises repeating units 2, repeating unit 2 wherein Z represents O or NH, R1 represents H or CH3, R2 represents a group selected from hydrocarbyl groups and ether group-containing groups, R3 represents an organic group having 2 to 4 carbon atoms, R4 and R5 independently represent an organic group, wherein R4 and R5 are optionally linked to each other to form a cyclic structure, and b) a polymer comprising at least one acidic group, and having a number average molecular weight of 300 g/mol or higher.