Polyether Modified Epoxide-Amine Adducts for Paint Compatibility
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Solution Overview
Problem
Existing wetting and dispersing agents for pigments and fillers have limited compatibility with various binder and solvent systems, leading to issues with viscosity, storage stability, and gloss in paintwork, and are not easily available in a broad range of applications.
Innovation Solution
The development of addition compounds formed by reacting polyepoxides with primary polyoxyalkyleneamines and aliphatic or araliphatic amines, along with polyether, polyester, or polyether-polyester-modified isocyanates, which create urethane bonds for improved compatibility and stability, and can be modified to adapt to specific requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing wetting and dispersing agents are used for pigments and fillers, then dispersion is achieved, but compatibility with various binder and solvent systems is limited, affecting viscosity, storage stability, and gloss
Solution Approach 1:
The patent creates dispersants with multiple functional groups (ether oxygens, hydroxyl groups, carbonyl groups, and basic nitrogen atoms) that can interact with different polarities of binders, solvents, and pigment surfaces simultaneously, enabling universal compatibility across various binder-solvent systems while maintaining reliable storage stability and gloss
Solution Approach 2:
The dispersants are synthesized as complex polyether-modified epoxide-amine adducts combining multiple chemical functionalities within a single molecular structure, creating a composite material that integrates the benefits of surfactant properties, pigment affinity, and binder compatibility in one substance
2Stability of the object's composition
If high mechanical forces are applied to introduce solids into liquid media, then dispersion is achieved, but total energy input and dispersion time increase
Solution Approach 1:
The patent employs polyether-modified dispersants as intermediary substances that mediate between pigment particles and liquid media, reducing the interfacial tension and mechanical forces required for dispersion while maintaining stable dispersion through the dispersant's multiple functional groups that simultaneously interact with both pigment surfaces and binder-solvent systems
3Stability of the object's composition
If dispersants are applied in small quantities directly to solid or added to liquid medium, then initial dispersion is achieved, but reaggregation occurs after the dispersion process
Solution Approach 1:
The patent synthesizes complex polyether-modified epoxide-amine adducts that function as multifunctional dispersants, where the combination of ether oxygens, hydroxyl groups, carbonyl groups, and basic nitrogen atoms creates a composite molecular structure that provides both initial dispersion and long-term stabilization, preventing reaggregation without requiring excessive quantities
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
These compounds provide broad compatibility with common binder-solvent systems, enhance long-term and storage stability, reduce viscosity without affecting gloss or haze, and are widely available, making them suitable for diverse industrial applications.
Implementation Method 1
The development of addition compounds formed by reacting polyepoxides with primary polyoxyalkyleneamines and aliphatic or araliphatic amines, along with polyether, polyester, or polyether-polyester-modified isocyanates, which create urethane bonds
Implementation Method 2
As wetting and dispersing agents, they reduce the viscosity of such systems
Implementation Method 3
As wetting and dispersing agents, they reduce the viscosity of such systems, improve storage stability and flow properties
Data Source
AI summary
The invention relates to an addition compound suited as a wetting and dispersing agent, which can be obtained by reacting A) polyepoxides with B) at least one primary polyoxyalkylene amine, C) at least one further aliphatic and/or araliphatic primary amine, and D) at least one modified isocyanate.