Intumescent Coating Rapid Curing Fire Protection
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Solution Overview
Problem
Existing fire protection coatings for steel structures, particularly those based on solvent or water systems, face challenges such as long curing times, material inefficiency, and potential cracking or peeling, which hinder the rapid achievement of required fire resistance times and increase costs.
Innovation Solution
A novel intumescent composition comprising a multifunctional Michael acceptor, a multifunctional Michael donor, and an intumescent-forming additive, with a catalyst for the Michael addition reaction, allowing for rapid curing and high intumescence with reduced layer thickness, eliminating the need for solvents and hazardous amine compounds, and achieving excellent adhesion and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If solvent- or water-based intumescent coatings are used, then the coating can be applied and dried, but the curing time becomes excessively long and multiple coats are required
Solution Approach 1:
The patent changes the chemical parameters of the binder system from solvent-based or water-based systems to a 100% solid epoxy-amine system. This parameter change eliminates the need for solvent evaporation or water drying, allowing the coating to cure through chemical reaction alone, thereby dramatically reducing curing time and enabling thicker layers to be applied in a single coat.
Solution Approach 2:
The patent extracts and eliminates solvents or water from the coating formulation, creating a 100% solid system. By removing the volatile component that requires evaporation or drying time, the coating can proceed directly to chemical curing, thus resolving the time loss associated with solvent-based or water-based systems.
2Reliability
If the required layer thickness is applied to achieve fire resistance, then fire protection is sufficient, but the coating becomes prone to cracking and peeling
Solution Approach 1:
The patent employs a composite binder system combining epoxy resin and amine hardener, creating a flexible yet strong polymer matrix. This composite material structure provides both the adhesion needed to prevent peeling and the flexibility to accommodate thermal expansion without cracking, while still achieving the required fire resistance at appropriate thicknesses.
Solution Approach 2:
The patent changes the chemical composition parameters of the binder to create a more flexible polymer matrix with appropriate glass transition temperature and cross-link density. This parameter optimization allows the coating to maintain integrity at the required thickness by balancing rigidity for fire resistance with flexibility to prevent cracking and peeling.
3Loss of time
If epoxy-amine-based systems are used to reduce curing time, then curing is faster, but the binder forms a rigid matrix that hinders foam formation
Solution Approach 1:
The patent optimizes the epoxy-to-amine ratio and selects specific amine hardeners with appropriate molecular weight and functionality to create a polymer matrix with balanced properties. By adjusting these chemical parameters, the coating achieves sufficiently fast curing while maintaining matrix flexibility that allows foam expansion, thus resolving the contradiction between curing speed and foam formation capability.
4Reliability
If thick coating layers are applied to achieve sufficient foam thickness for insulation, then fire resistance is improved, but material consumption increases
Solution Approach 1:
The patent changes the chemical composition of the binder to improve foam expansion ratio and intumescence efficiency. By optimizing the binder's chemical structure and reactivity, the system generates more foam volume per unit of coating material, thus achieving the required fire resistance with thinner layers and reduced material consumption.
Solution Approach 2:
The patent enhances the local quality of the coating by incorporating high-performance intumescent additives and optimizing the binder chemistry to maximize foam expansion at the coating-substrate interface. This localized optimization of foam generation efficiency allows adequate insulation to be achieved with less overall material while maintaining fire resistance.
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 enables rapid application and curing, achieving high intumescence with thin layers, maintaining material efficiency, and forming a stable ash crust that significantly enhances fire resistance without the need for additional stabilizers, reducing material costs and processing complexity.
Implementation Method 1
a binder which comprises a Michael acceptor and a Michael donor and has a low softening range, in particular below 100°C, preferably below 80°C, in particular below 60°C
Implementation Method 2
the binder primarily hardens through oxidation and polymerization reactions, induced, for example, by atmospheric oxygen
Implementation Method 3
These coatings are paints whose components expand in the event of a fire, forming a solid, microporous carbon foam
Implementation Method 4
This process creates a fine-pored and thick foam layer, the so-called ash crust, which, depending on its composition, provides strong thermal insulation and thus delays the heating of the component
Data Source
AI summary
The invention relates to a composition forming an insulating layer, which composition contains a binder, which is based on a compound having electron-deficient carbon multiple bonds and a carbanion-forming compound. By means of the composition according to the invention, the expansion rate of which is relatively high, coatings having the layer thickness required for the particular fire resistance time can be applied easily and quickly, wherein the layer thickness can be reduced to a minimum and nevertheless a great insulating effect can be achieved. The composition according to the invention is suitable especially for fire protection, in particular as a coating of steel components, such as supports, beams and truss members, for increasing the fire resistance time.