Polysulfide-Epoxy Fire-Resistant Coating for Dual Jet and Pool Fire Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current fire-resistant coatings provide either good jet fire resistance or pool fire resistance but not both, and they often generate significant smoke and require additional topcoats for optimal performance.
Innovation Solution
A composition comprising a polysulfide, epoxy resin, compounds with secondary and/or tertiary amine groups, phosphonates, fibers, and a char-forming adjunct, which expands to form a stable carbonaceous char, offering superior jet fire resistance, low smoke generation, and good weatherability without the need for a separate topcoat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fire-resistant coatings are used, then either jet fire resistance or pool fire resistance is achieved, but not both simultaneously
Solution Approach 1:
The patent employs a composite coating formulation integrating polysulfide resin, epoxy resin, intumescent agents (melamine, ammonium polyphosphate), and reactive diluents. This composite material system synergistically provides both jet fire resistance through rapid char formation and pool fire resistance through sustained insulation, resolving the contradiction by combining multiple functional components in a single coating system that delivers dual fire protection modes simultaneously
2Reliability
If traditional intumescent coatings are applied, then fire resistance is improved, but significant smoke is generated
Solution Approach 1:
The patent modifies the chemical composition parameters of the intumescent system by incorporating specific phosphorus-containing compounds (ammonium polyphosphate) and nitrogen-containing compounds (melamine) in optimized ratios, along with reactive diluents that control the decomposition temperature and char formation kinetics. These parameter changes promote low-smoke char formation while maintaining fire resistance, as the controlled decomposition produces less volatile smoke-generating byproducts compared to conventional intumescent coatings
3Reliability
If optimal fire protection performance is achieved, then additional topcoats are required, but this increases coating system complexity
Solution Approach 1:
The patent creates a multi-functional coating system where the polysulfide-epoxy-based coating simultaneously provides fire resistance, corrosion protection, and weatherability without requiring separate topcoats. The coating forms a dense, adherent film that acts as both the fire protective layer and the environmental protection layer, consolidating multiple functions into a single coating application and eliminating the need for additional topcoat layers
4Strength
If mesh reinforcement is used to maintain structural integrity, then high heat resistance is improved, but the complexity and cost of application increase
Solution Approach 1:
The patent utilizes the polysulfide resin's inherent flexibility and elasticity to create a coating film that maintains structural integrity at high temperatures without requiring mesh reinforcement. The coating forms a flexible protective shell that can accommodate thermal expansion and contraction while maintaining adhesion and preventing substrate failure, thereby achieving high-temperature strength through the coating film itself rather than through mechanical reinforcement structures
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 provides extended protection against jet fires and pool fires with reduced smoke generation and maintains structural integrity without mesh reinforcement, meeting stringent durability and corrosion standards.
Implementation Method 1
The composition expands to form a substantially stable and protective carbonaceous char
Implementation Method 2
the binder also provides a source of carbon, which, in a fire, is converted to a char
Implementation Method 3
The coating slows the rate of temperature increase of the substrate to which the coating is applied
Data Source
AI summary
The invention relates to a composition that can be used as a coating and that can protect a substrate coated with this composition from high heat. The composition comprises: - a polysulfide, - an epoxy resin, - a compound selected from compounds having a secondary and/or a tertiary amine group, and compounds having an amide group, - a phosphonate, - fibres and - less than 1 wt.% of a polysiloxane, wherein the wt.% is relative to the weight of the composition after evaporation of any solvent that is present in the composition.