Fireproof Sealing Composition That Stays Elastic During Panel Deformation
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Solution Overview
Problem
Existing fireproof sealing materials for building structures suffer from foaming and brittleness during fires, leading to loss of fire resistance due to wind pressure and inability to follow dimensional changes caused by panel deformation, and are compromised by exposure to outdoor conditions and moisture, further reducing their effectiveness.
Innovation Solution
A curable composition comprising 100 parts by mass of a curable resin and 10 to 150 parts by mass of a poorly water-soluble phosphorus-based compound, which includes polymers with hydrolyzable silyl groups to maintain rubber elasticity and stability during high temperatures, ensuring the composition can follow dimensional changes and maintain a filling state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fireproof sealing material is used, then fire resistance is improved, but the material becomes brittle and falls off due to foaming during fire
Solution Approach 1:
The patent changes the chemical composition parameters of the sealing material by incorporating specific compounds (polyalkylene oxide with silyl groups, ammonium polyphosphate, aluminum hydroxide, calcium carbonate) that modify the thermal behavior. These parameter changes prevent unwanted foaming while maintaining fire resistance and structural integrity at high temperatures.
Solution Approach 2:
The patent creates a composite sealing material combining multiple components: polyalkylene oxide with silyl groups as base polymer, ammonium polyphosphate as flame retardant, aluminum hydroxide for thermal stability, and calcium carbonate for structural support. This composite structure achieves both fire resistance and mechanical strength during fire exposure.
2Reliability
If the sealing material is exposed to rain and moisture, then outdoor durability is improved, but rubber elasticity decreases when heated to 400°C
Solution Approach 1:
The patent modifies the chemical parameters of the sealing material by using polyalkylene oxide with hydrolyzable silyl groups that form crosslinked structures. This crosslinking parameter change maintains rubber elasticity at high temperatures even after moisture exposure, preventing the material from becoming rigid while maintaining outdoor durability.
Solution Approach 2:
The patent applies preliminary protective action by incorporating hydrolyzable silyl groups that react with moisture to form a protective crosslinked network before fire exposure. This preliminary crosslinking prevents the material from losing elasticity when subsequently exposed to high temperatures, ensuring the sealing function remains effective.
3Reliability
If the sealing material follows dimensional changes in the sealing section, then fire resistance is maintained, but the material may fall off due to wind pressure from combustion flames
Solution Approach 1:
The patent uses a composite material system where calcium carbonate particles provide structural reinforcement and anchoring strength to resist wind pressure from combustion flames, while the polyalkylene oxide matrix maintains flexibility to follow dimensional changes. This composite structure simultaneously addresses both requirements.
Solution Approach 2:
The patent adjusts the viscosity and crosslinking density parameters of the sealing material to achieve optimal balance between flexibility and strength. The material maintains enough softness to follow dimensional changes but sufficient structural integrity to resist being blown off by flame wind pressure.
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 excellent rubber elasticity and stability up to 400°C, preventing flame penetration and maintaining fire resistance by adhering to the sealing section even under extreme conditions.
Implementation Method 1
The composition provides excellent rubber elasticity and stability up to 400°C
Implementation Method 2
a polyalkylene oxide having a hydrolyzable silyl group
Data Source
AI summary
The present invention provides a curable composition that can smoothly follow dimensional changes in a sealing section, the dimensional change being caused by the heat during a fire, can reliably maintain a filling state of the sealing section, can prevent flames from penetrating through the sealing section, and can thus impart excellent fire resistance to a building structure. A curable composition for a sealing material according to the present invention is characterized by including 100 parts by mass of a curable resin and 10 to 150 parts by mass of a poorly water-soluble phosphorus-based compound. A cured product of the curable composition can stably maintain the closing state of the sealing section during a fire.