Polymeric Dispersant via Non-Condensation Reaction
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Solution Overview
Problem
Current aqueous dispersion formulations face issues such as low pigment loading, large particle size requirements, poor foaming characteristics, and instability, particularly due to the high temperature and water removal requirements of existing condensation reactions used in producing sulfur-containing dispersants.
Innovation Solution
A non-condensation reaction between a polymeric acid copolymer of acrylic and maleic acid and a hydrophilic amine, conducted at temperatures below 100°C, to produce a polymeric dispersant suitable for aqueous dispersion applications, which allows for the formation of predominantly salt products and improved stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If condensation reaction is used to produce sulfur-containing dispersants, then dispersant functionality is achieved, but high temperature and water removal requirements increase process complexity and energy consumption
Solution Approach 1:
The patent extracts the sulfur-containing functional groups from the condensation reaction process and incorporates them directly into the polymeric acid structure before dispersion formation. This eliminates the need for separate condensation reactions requiring water removal apparatus and high temperature control, thereby reducing process complexity while maintaining dispersant functionality
Solution Approach 2:
The sulfur-containing functional groups are pre-incorporated into the polymeric acid structure before the dispersion formation process. This preliminary incorporation of functional groups eliminates the need for subsequent condensation reactions, reducing both process complexity and energy consumption while ensuring dispersant functionality is present from the start
2Reliability
If condensation reaction is used to produce dispersants, then dispersant functionality is achieved, but high temperature requirements increase energy consumption
Solution Approach 1:
The patent extracts the high-temperature condensation reaction step from the dispersant production process by pre-incorporating sulfur-containing functional groups into the polymeric acid. This eliminates the need for high temperature processing while maintaining dispersant functionality, thereby reducing energy consumption
Solution Approach 2:
The sulfur-containing functional groups are pre-incorporated into the polymeric acid structure before dispersion formation, eliminating the need for subsequent high-temperature condensation reactions. This preliminary action reduces energy consumption while ensuring dispersant functionality is achieved
3Reliability
If water removal is required to drive condensation reaction to completion, then dispersant functionality is achieved, but reduced pressure requirements increase process complexity
Solution Approach 1:
The patent extracts the water removal step from the process by pre-incorporating sulfur-containing functional groups into the polymeric acid structure. This eliminates the need for reduced pressure operations to drive condensation reactions, thereby reducing process complexity while maintaining dispersant functionality
Solution Approach 2:
The sulfur-containing functional groups are pre-incorporated into the polymeric acid before dispersion formation, eliminating the need for subsequent condensation reactions that would require water removal under reduced pressure. This preliminary action simplifies the process while ensuring dispersant functionality
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 solution enables higher pigment loading, smaller particle sizes, improved stability, and reduced viscosity, enhancing the performance and handling of aqueous dispersion compositions in applications like paint, ink, and coatings, while avoiding the drawbacks of high-temperature condensation reactions.
Implementation Method 1
A non-condensation reaction between a polymeric acid copolymer of acrylic and maleic acid and a hydrophilic amine, conducted at temperatures below 100°C, to produce a polymeric dispersant suitable for aqueous dispersion applications, which allows for the formation of predominantly salt products
Data Source
AI summary
Embodiments of the present invention disclose polymeric dispersants that are the reaction product of a polymeric acid and a hydrophilic amine.