Transparent Epoxy Coating Composition With Phosphazene Flame Retardancy
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Solution Overview
Problem
Existing epoxy resin compositions for transparent flame-retardant coatings do not adequately balance transparency and flame retardancy, with conventional methods either compromising on transparency or failing to provide sufficient fire protection.
Innovation Solution
An epoxy resin composition comprising an epoxy resin, a specific diamine-based curing agent, and a phosphazene-based compound, with a total content of these components exceeding 85% by mass, ensuring compatibility and maintaining transparency while enhancing flame retardancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional flame retardants are used in epoxy resin compositions, then flame retardancy is improved, but transparency deteriorates
Solution Approach 1:
The patent changes the chemical structure parameters of the flame retardant by introducing a phosphazene-based compound with specific molecular structure ( Formula 2-1) containing fluorine atoms and alkoxy groups. This structural parameter change enables the flame retardant to maintain transparency while providing effective fire protection, resolving the contradiction between flame retardancy and transparency.
Solution Approach 2:
The patent creates a composite resin composition by combining epoxy resin with a specific phosphazene-based flame retardant compound. This composite material approach allows the synergistic effect of the two components to achieve both high transparency and excellent flame retardancy, overcoming the limitation of using conventional single-component flame retardants.
2Illumination intensity
If transparent flame-retardant paints are developed, then transparency is improved, but flame retardancy deteriorates
Solution Approach 1:
The patent optimizes the concentration parameter of the phosphazene-based compound within a specific range (0.1 to 10 mass% as phosphorus content) to achieve the optimal balance between transparency and flame retardancy. This parameter optimization ensures that the coating provides sufficient fire protection while maintaining high transparency.
3Reliability
If flame retardant paint is applied to prevent bleeding, then flame retardancy is preserved, but appearance deteriorates
Solution Approach 1:
The patent uses a phosphazene-based compound that does not cause whitening or discoloration of the wood surface. The chemical structure of the flame retardant (Formula 2-1) ensures that the coating remains transparent and does not alter the natural appearance of the wood, thus maintaining both flame retardancy and aesthetic appearance.
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 forms a coating film with excellent transparency and high flame retardancy, minimizing whitening and achieving an oxygen index of 27 or more, suitable for various applications including paints and coatings.
Implementation Method 1
a phosphazene-based compound (C), wherein a total content of the components (A) to (C) in the epoxy resin composition is 85 mass % or more
Implementation Method 2
an epoxy resin composition comprising an epoxy resin (A), an epoxy resin curing agent (B) containing a diamine represented by the following general formula (1) or a modified product thereof (b1)
Data Source
AI summary
An epoxy resin composition containing an epoxy resin (A), an epoxy resin curing agent (B) containing a diamine represented by the following general formula (1) or a modified product thereof (b1), and a phosphazene-based compound (C), wherein a total content of the components (A) to (C) in the epoxy resin composition is 85 mass % or more, and a paint containing the composition.wherein X is a phenylene group or a cyclohexylene group.