Methacrylate Resin System for Intumescent Fire Coatings
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Solution Overview
Problem
Existing intumescent coating systems for fire protection, particularly methacrylate-based systems, face challenges such as complex manufacturing processes, limited freedom in formulation, and restricted ability to adjust foam height and quality, which hinders their efficiency and applicability.
Innovation Solution
A new procedure for producing methacrylate-based intumescent coatings involves polymerizing a first monomer mixture up to 70-95% polymerization degree, canceling polymerization, and then diluting the mixture with a second monomer mixture. This results in a resin system with a low glass transition temperature and improved synergy with filler systems, enabling efficient temperature-induced foaming and better foam control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a first monomer mixture is polymerized to high degree (95 wt%) and then diluted with a second monomer mixture, then the glass transition temperature is reduced and foam quality is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent divides the monomer mixture into two separate mixtures (first monomer mixture and second monomer mixture) that are processed and polymerized separately to different degrees, then combined. This segmentation allows independent optimization of polymerization degree for each mixture, achieving fine control over the final foam structure and glass transition temperature while maintaining manufacturing feasibility through modular process design.
2Manufacturing precision
If the resin system is designed with specific monomer compositions and polymerization degrees, then foam height and quality are better controlled, but the formulation freedom is limited
Solution Approach 1:
The patent systematically varies key parameters including the composition of monomer mixtures (first and second mixtures with different monomer ratios), the degree of polymerization (70-95 wt% for first mixture, lower for second), and the ratio of polymer to monomer in the final mixture. This multi-parameter optimization enables precise control over foam height, pore structure, and glass transition temperature while maintaining the ability to adapt to different application requirements by adjusting these parameters.
3Reliability
If conventional intumescent coatings are applied, then fire protection is provided, but the drying time is long and processing efficiency is low
Solution Approach 1:
The patent utilizes the phase transition characteristics of the polymerized monomer mixture, specifically controlling the glass transition temperature to be below ambient temperature. This ensures the coating remains in a flexible, processable state during application and initial drying, enabling faster evaporation of solvents and quicker formation of the fire-protective foam structure, thereby reducing drying time while maintaining fire protection performance.
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 new procedure simplifies the manufacturing process, provides greater freedom in formulating intumescent coatings, and allows for better control over foam height and quality, resulting in a more efficient and effective fire protection coating system.
Implementation Method 1
a first monomer mixture is polymerized to a maximum degree of 95 wt%
Implementation Method 2
In the event of a fire, these coatings are reactively foamed, forming a fire-resistant insulating layer with low thermal conductivity on the metal substrate
Data Source
AI summary
The present invention relates to a novel reaction resin system for an intumescent coating and to a process for producing this resin system. Intumescent coatings are used, in particular, in fire control for metallic components, such as steel girders in building construction. In the event of fire, these coatings are reactively foamed, forming a fire-resistant insulating layer with low thermal conductivity around the metal girder and delaying a premature, thermally induced failure of this component by the insulation thus formed. The present invention relates, in particular, to methacrylate-based resin systems that are produced using a novel process in which a first monomer fraction is polymerized to a maximum degree of 95% and is subsequently diluted with a second monomer mixture. The glass transition temperature of the polymeric component in the composition thus formed is particularly low in comparison to that in prior art. Moreover, the organic acids integrated into the resin system have a surprisingly synergistic action with the filler system. The resin systems thus produced are particularly efficient in the temperature-induced foaming due to their fine-pored and closed-pored foam structure.