Intumescent Coating Resin System for Rapid Curing and Metal Adhesion
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Solution Overview
Problem
Conventional intumescent coatings for steel surfaces have slow drying times, especially in thick layers, which limits on-site application and throughput, and often fail to adhere well to metal surfaces during fire tests.
Innovation Solution
A resin system comprising ethylenically unsaturated monomers, polymeric components with beta-CEA or polymerizable polyfunctionalized carboxylic acids, and AZO initiators or organic peroxides, which provides excellent adhesion and rapid curing, allowing for quick drying and application on both metal and wood surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional high-molecular thermoplastic resins are used, then the coating can be applied to metal surfaces, but the drying time becomes very long especially for thick layers
Solution Approach 1:
The patent changes the chemical composition parameters of the resin system by combining thermoplastic polymeric resin with low molecular weight monomers containing ethylenically unsaturated double bonds (such as methacrylate or acrylate groups). This compositional parameter change enables the coating to achieve both thick layer application capability and rapid curing through chemical crosslinking reaction, resolving the contradiction between coating thickness and drying time.
2Object-affected harmful factors
If water-based coatings are used for environmental reasons, then the coating can be applied, but the drying time increases especially in high humidity areas
Solution Approach 1:
The patent replaces the physical evaporation mechanism (which is slow and humidity-dependent) with a chemical crosslinking mechanism. The low molecular weight monomers with ethylenically unsaturated double bonds undergo polymerization crosslinking reactions, transforming the coating from a solvent-evaporation-based system to a chemically-curing system. This substitution eliminates the harmful dependence on environmental humidity while achieving rapid curing.
3Loss of time
If polyurethane systems are used, then the drying time is relatively short and water resistance is good, but the coating does not adhere well to steel during fire tests
Solution Approach 1:
The patent creates a composite resin system by combining thermoplastic polymeric resin with low molecular weight monomers containing reactive ethylenically unsaturated double bond groups. This composite material approach integrates the benefits of both components: the thermoplastic resin provides base coating properties while the low molecular weight monomers provide reactive crosslinking groups that enhance adhesion to steel surfaces, resolving the adhesion problem while maintaining short drying times.
4Loss of time
If epoxy based intumescent coatings are used, then aging resistance is good and drying time is relatively short, but they are limited to off-shore industry applications
Solution Approach 1:
The patent creates a universal resin system that can be applied to multiple substrates including steel and wood surfaces. The combination of thermoplastic polymeric resin with low molecular weight monomers containing ethylenically unsaturated double bonds provides a versatile coating system that maintains good adhesion to metal surfaces (unlike polyurethane systems) while also being suitable for wood coating applications, thus expanding the application scope beyond off-shore industry to general construction and furniture sectors.
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 resin system achieves rapid curing times of approximately 1 hour, enabling efficient in-shop application with acceptable throughput and excellent adhesion to steel surfaces, suitable for thick films, and can be used on both metal and wood surfaces.
Implementation Method 1
The resin system comprises (a) at least one ethylenically unsaturated monomer component; and (b) at least one polymeric component with beta-CEA or polymerizable polyfunctionalized carboxylic acids... and (c) AZO initiators or organic peroxides
Implementation Method 2
Intumescent coatings are used to protect steel or steel beams from fire damage in construction. Conventional systems are provided with various intumescent additives that react together when exposed to heat and form an insulating foam that has low thermal conductivity.
Data Source
AI summary
The invention relates to an intumescent coating with enhanced metal adhesion.