Cardanol-Modified Coating Polymer for High-Solids Low Viscosity
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Solution Overview
Problem
Coating compositions with high solid content face issues of high viscosity, leading to long filtration times and poor flowability during application, which are not adequately addressed by existing cardanol-modified acrylate resins.
Innovation Solution
A cardanol-derivatives modified polymer is synthesized through a reaction of epoxy groups in a cardanol-derivative compound with carboxyl groups in a carboxyl-functional polymer, resulting in a coating composition with higher nonvolatile content and lower viscosity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If cardanol-modified acrylate resin is used to increase non-volatile content, then VOC content is reduced, but viscosity increases leading to poor flowability
Solution Approach 1:
The patent modifies the chemical structure of cardanol by reacting it with epoxy compounds to introduce epoxy groups, then further reacting with carboxyl-functional polymers to create a modified polymer with altered molecular weight and functional group distribution. This parameter change in molecular structure achieves lower viscosity while maintaining high non-volatile content
Solution Approach 2:
The patent creates a composite polymer system by combining cardanol-derivative compounds with carboxyl-functional polymers through chemical reaction. The resulting cardanol-derivatives modified polymer integrates the benefits of both components: the natural phenolic structure of cardanol and the functional properties of carboxyl polymers, achieving optimized rheological properties
2Ease of operation
If traditional cardanol modified acrylate resin is synthesized, then some viscosity reduction is achieved, but the viscosity remains too high for certain applications
Solution Approach 1:
The synthesis process is divided into distinct stages: first reacting cardanol with haloalkylene oxide to form cardanol-derivative compound with epoxy groups, then reacting this intermediate with carboxyl-functional polymer. This segmented approach allows precise control over the final polymer structure and properties
Solution Approach 2:
The cardanol-derivative compound with epoxy groups serves as an intermediary substance between cardanol and carboxyl-functional polymer. This intermediate structure facilitates the controlled introduction of functional groups and enables the formation of the final modified polymer with desired 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 modified polymer composition achieves a lower viscosity and higher nonvolatile content, requiring less solvent and meeting stringent VOC regulations while maintaining effective application properties.
Implementation Method 1
a cardanol-derivatives modified polymer obtained from a reaction of epoxy groups in a cardanol-derivative compound and carboxyl groups in a carboxyl-functional polymer
Data Source
AI summary
Described herein is a cardanol-derivatives modified polymer obtained from a reaction of epoxy groups in a cardanol-derivative compound and carboxyl groups in a carboxyl-functional polymer, where the cardanol-derivative compound is the reaction product of cardanol-derivatives modified with haloalkylene oxide having a carbon number of from 3 to 10. Also described herein is a process of preparing the cardanol-derivatives modified polymer, a method of using the cardanol-derivatives modified polymer in automotive coatings, and the obtained coating composition thereof.