Transparent Intumescent Textile Coating Without Formaldehyde
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Solution Overview
Problem
Existing flame-retardant coatings for textiles are either not transparent, not flexible, or emit harmful formaldehyde, failing to provide adequate fire resistance while maintaining the original substrate's flexibility and transparency.
Innovation Solution
A flame-retardant composition comprising an acrylic resin, a dehydrating compound such as phosphoric acid or ammonium polyphosphate, and a blowing agent like urea, applied to a textile substrate with mineral fibers, which forms an intumescent layer that is transparent, flexible, and free of formaldehyde.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If melamine-formaldehyde resin is used in flame-retardant coating, then transparency is improved, but flexibility is significantly reduced and formaldehyde emission occurs
Solution Approach 1:
The patent removes the harmful formaldehyde component from the melamine-formaldehyde resin system while retaining the beneficial transparency and intumescent properties. This is achieved by substituting the formaldehyde-based resin with alternative flame-retardant compounds that do not release formaldehyde, thus extracting the harmful element while preserving the functional requirements.
Solution Approach 2:
The patent modifies the chemical composition parameters of the coating by replacing melamine-formaldehyde resin with alternative flame-retardant compounds. This parameter change eliminates formaldehyde emission while maintaining or improving transparency and flexibility characteristics of the coating layer.
2Illumination intensity
If melamine-formaldehyde resin is used in flame-retardant coating, then transparency is improved, but flexibility is significantly reduced
Solution Approach 1:
The patent extracts the rigidifying component from the melamine-formaldehyde resin system that causes flexibility loss, while retaining the transparency-enhancing properties. By removing the harmful rigid structure-forming elements and replacing them with flexible alternative compounds, the coating maintains transparency without sacrificing substrate flexibility.
Solution Approach 2:
The patent changes the physical and chemical parameters of the coating formulation by substituting melamine-formaldehyde resin with alternative compounds that provide different mechanical properties. This parameter modification allows the coating to remain transparent while preserving the flexibility of the underlying textile substrate.
3Ease of operation
If anti-fire additives are used instead of intumescent coatings, then transparency and flexibility are maintained, but fire effectiveness is reduced
Solution Approach 1:
The patent creates a composite coating system that combines the flexibility-preserving properties of anti-fire additive systems with the enhanced fire protection mechanisms of intumescent compounds. By integrating multiple functional components, the coating achieves both flexibility maintenance and superior fire effectiveness that neither system could provide alone.
Solution Approach 2:
The patent designs a multi-functional coating composition that simultaneously provides flexibility maintenance, transparency, and enhanced fire protection. The composite formulation incorporates multiple active ingredients that work together to deliver diverse functions: flexibility preservation from the base system and superior fire effectiveness from the intumescent mechanism.
4Reliability
If flame-retardant coating is applied to textile substrate, then fire resistance is improved, but the coating may emit harmful substances or reduce substrate flexibility
Solution Approach 1:
The patent converts potentially harmful emissions into beneficial protective mechanisms. The coating formulation is designed to decompose in a controlled manner during fire exposure, transforming what would be harmful emissions into a protective intumescent char layer that shields the substrate while minimizing harmful substance release.
Solution Approach 2:
The patent modifies the thermal decomposition parameters of the coating by selecting compounds with specific decomposition characteristics. This parameter optimization ensures that the coating releases protective gases and forms protective char at temperatures that maximize fire protection while minimizing harmful emissions, thus controlling the decomposition behavior for beneficial outcomes.
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 solution provides enhanced fire resistance, maintains the substrate's flexibility, and avoids the use of formaldehyde, ensuring compliance with regulations while maintaining transparency and improving aging resistance in humid environments.
Implementation Method 1
a dehydrating compound which releases a strong acid or a precursor of the latter which is capable of releasing a strong acid at a temperature above 100°C, preferably which varies from 100 to 250°C
Implementation Method 2
a blowing agent which releases non-flammable gases such as carbon dioxide or ammonia when it degrades thermally
Implementation Method 3
which forms an intumescant layer that is transparent, flexible, and free of formaldehyde
Data Source
AI summary
The invention relates to a flame-retardant composition provided with intumescent properties consisting of an acrylic resin, a desiccant, a blowing agent and, optionally a fluoropolymer. The invention also relates to a textile substrate coated with the aforementioned flame-retardant composition, more particularly a luminous fabric including optical fibers and bonding wires.