Silicone Acrylic Fire Coating Weathering Stability
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Solution Overview
Problem
Conventional intumescent fire protection coatings face challenges with low weathering stability, requiring additional top coats, soft and unstable insulation foams, complex application processes, and limited fire resistance times due to thermoplastic properties, especially in outdoor and industrial applications.
Innovation Solution
Aqueous intumescent fire protection coating composition using a silicone resin emulsion as a binder and a foam-forming agent, providing improved weathering stability and thermoplasticity, allowing for high expansion values of insulating foam layers, and meeting fire resistance requirements with lower layer thicknesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional water-based 1K-IC coatings are used, then the coating is easy to apply, but the weathering resistance is low and additional topcoat is required
Solution Approach 1:
The patent uses a composite binder system combining acrylic resin and silicone resin emulsion. The acrylic resin provides ease of application and film formation, while the silicone resin component (at least 20 wt% of total binder) provides enhanced weathering resistance and hydrophobicity, eliminating the need for additional topcoats while maintaining applicability.
Solution Approach 2:
The patent modifies the chemical composition parameters of the binder by incorporating silicone resin emulsion at specific concentrations (20-60 wt% of total binder). This parameter change transforms the binder properties to simultaneously achieve good weathering resistance, hydrophobicity, and ease of application without requiring additional protective layers.
2Reliability
If conventional solvent-based 1K-IC coatings are used, then the weathering resistance is improved, but the insulating foams are soft and unstable leading to delamination
Solution Approach 1:
The patent creates a composite binder system where acrylic resin provides structural integrity and foam stability, while silicone resin emulsion enhances weathering resistance. The synergistic interaction between these two resin types produces insulating foams that are both stable and resistant to delamination, while maintaining excellent weathering performance.
Solution Approach 2:
The patent assigns different functional properties to different components of the binder system. The acrylic resin component primarily provides foam stability and structural support, while the silicone resin component specifically targets weathering resistance and hydrophobicity. This functional differentiation resolves the contradiction between foam stability and weathering resistance.
3Reliability
If epoxy-based 2K-IC coatings are used, then the chemical cross-linking provides thermosetting properties, but this limits intumescent behavior and requires very high layer thicknesses
Solution Approach 1:
The patent changes the fundamental chemical nature of the binder from thermosetting (epoxy-based 2K-IC) to thermoplastic (acrylic and silicone resin emulsion). This parameter change in the binder's thermal behavior allows the coating to maintain chemical stability while preserving intumescent foam expansion capabilities, enabling effective fire protection at much lower layer thicknesses and simplifying the application process to a single component system.
4Duration of action of stationary object
If high layer thicknesses are applied to achieve required fire resistance ratings, then the fire resistance time is improved, but the application process becomes more complex and material consumption increases
Solution Approach 1:
The patent changes the thermal properties of the binder from thermosetting to thermoplastic, which fundamentally alters the intumescent mechanism. This allows the coating to achieve superior fire resistance times (exceeding 2 hours) at much lower layer thicknesses (can be applied at 0.5-2 mm), thereby simplifying the application process and reducing material consumption while maintaining or improving 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 composition achieves enhanced mechanical stability and extended fire resistance times, preventing insulation layer failure and cracks, and meets hydrocarbon fire resistance standards with improved weathering stability and reduced layer thicknesses.
Implementation Method 1
exhibits improved weathering stability compared to conventional one-component fire retardants due to the highly hydrophobic properties of silicone resin emulsions
Implementation Method 2
The good thermoplasticity of binders with silicone resins simultaneously generates high expansion values of the insulating foam layers in the event of a fire
Implementation Method 3
Intumescent fire-retardant coatings, also known as intumescent coatings (IC), are characterized by their ability to foam up under the influence of sufficient temperature in the event of a fire
Data Source
AI summary
The invention relates to a composition for an aqueous fire protection coating that forms insulating layers, the composition consisting of at least one silicone resin emulsion and an agent that forms foam in the event of fire. The invention further relates to an intumescent fire protection coating comprising such a composition, and also to the use of and a production method for this composition.