Thiol-ene Fire Resistant Cable Coating Adhesion
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Solution Overview
Problem
Current fire protection methods for cables, such as intumescent coatings and ablative materials, face challenges including slow curing times, adhesion issues, and inefficiencies in preventing fire spread, especially in vertical or inclined cable routes, leading to inadequate fire resistance and increased risk in industrial and high-density building environments.
Innovation Solution
A fire protection composition comprising a thiol-ene-based binder system with reactive components and ablative additives that undergo endothermic decomposition, providing rapid curing, high filling efficiency, and excellent adhesion without the need for solvents or water, forming a stable insulating layer that prevents fire spread.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If intumescent coatings are applied to cables, then fire resistance is improved, but the coating detaches and flakes off in vertical or inclined arrangements, reducing protection effectiveness
Solution Approach 1:
The patent changes the chemical composition parameters of the coating by incorporating specific adhesion promoters and modifying the polymer matrix to accommodate cable surface characteristics. This resolves the adhesion problem while maintaining the intumescent fire protection function, allowing the coating to remain stable on vertically or inclined arranged cables during fire exposure.
Solution Approach 2:
The patent creates a composite coating system that combines intumescent agents with adhesion-promoting components and flexible binders. This composite structure maintains both the fire protection capability (through intumescence) and the adhesion stability (through specialized bonding agents), preventing detachment even in challenging vertical installations.
2Reliability
If thick insulating materials are used for fire protection, then fire resistance is improved, but thermal insulation properties cause current-carrying capacity degradation
Solution Approach 1:
The patent utilizes the phase transition property of intumescent materials that remain thermally conductive at operating temperatures but undergo volumetric expansion and form insulating char structures only when exposed to fire temperatures. This allows the coating to provide adequate fire protection while maintaining thermal conductivity for heat dissipation during normal cable operation.
3Ease of manufacture
If solvent-based or water-based coating systems are used, then application is simplified, but drying time increases and layer thickness is reduced
Solution Approach 1:
The patent replaces the evaporation-based drying mechanism (physical process) with a chemical crosslinking curing mechanism. The coating cures through chemical reactions forming a crosslinked polymer network, which does not depend on solvent or water evaporation. This eliminates the long drying times associated with solvent-based systems while allowing for adequate layer thickness application.
4Reliability
If ablative materials are applied to cables, then fire protection is improved, but adhesion to cables and cable holders is problematic
Solution Approach 1:
The patent introduces adhesion promoter molecules as intermediaries between the ablative fire protection materials and the cable surface. These promoter molecules create strong chemical or physical bonds with both the substrate and the ablative coating, ensuring stable adhesion of the fire protection layer to cables and cable holders throughout the fire exposure period.
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 rapid application and high fire resistance with minimal layer thickness, maintaining over 95% of the coating on the substrate, effectively cooling cables and preventing fire spread through endothermic reactions, while ensuring excellent adhesion to various substrates.
Implementation Method 1
a thiol-ene-based binder system with reactive components that undergo endothermic decomposition, providing rapid curing, high filling efficiency, and excellent adhesion
Implementation Method 2
ablative additives that undergo endothermic decomposition, providing rapid curing, high filling efficiency, and excellent adhesion without the need for solvents or water, forming a stable insulating layer that prevents fire spread
Implementation Method 3
forming a stable insulating layer that prevents fire spread
Data Source
AI summary
The invention relates to a composition which contains a binder based on thiol-ene. Said claimed composition makes it possible to apply, in a simple and rapid manner, coatings that have the layer thickness required for the respective fire resistance grading, the layer thickness being reduced to a minimum while achieving a good fireproofing effect. Said claimed composition is particularly suitable for fire protection, especially as a coating for cables and cable routes for increasing the fire resistance grading.