Hybrid Intumescent Coating Composition Without Plasticizer Tradeoffs
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Solution Overview
Problem
Existing intumescent coatings do not provide an optimal balance of passive fire resistance, flexibility, toughness, and adhesiveness, particularly in applications involving movement and impact, and often require plasticizers that compromise durability and moisture resistance.
Innovation Solution
A mixture comprising silane-terminated polymer, cross-linkers for curing the silane-terminated polymer and epoxy resin, along with an intumescent package, which can be cured to form a hybrid polymer system with improved properties, including a two-part mixture for enhanced application and curing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If plasticizers are added to improve flexibility, then flexibility is improved, but durability and moisture resistance deteriorate
Solution Approach 1:
The patent changes the chemical composition parameters by using silane-terminated polymers with specific molecular weights and vinyl silane crosslinkers in controlled ratios, achieving flexibility through polymer chain mobility rather than plasticizer addition, thus maintaining durability and moisture resistance
Solution Approach 2:
The patent creates a composite polymer system combining silane-terminated polymer, vinyl silane crosslinker, and intumescent components, where the synergistic interaction between components provides both flexibility and durability without requiring plasticizers that would compromise performance
2Reliability
If intumescent package is increased to improve fire resistance, then passive fire resistance is improved, but viscosity and weight increase
Solution Approach 1:
The patent optimizes the concentration parameters of intumescent components (ammonium polyphosphate, melamine, pentaerythritol) within specific ranges (10-30 wt%, 5-20 wt%, 1-10 wt% respectively) to achieve adequate fire resistance while controlling viscosity and weight for practical application
Solution Approach 2:
The patent concentrates intumescent functionality in specific chemical components that provide fire protection where needed, while the silane-polymer matrix provides the continuous phase that controls rheology and weight, creating localized functional zones rather than uniform distribution
3Strength
If silane-terminated polymer and epoxy resin are combined to improve toughness and adhesiveness, then mechanical properties are improved, but curing complexity increases
Solution Approach 1:
The patent merges the silane-terminated polymer and epoxy resin systems into a single hybrid polymer matrix that cures through a unified mechanism using vinyl silane crosslinkers, achieving both toughness and adhesiveness while simplifying the curing process compared to separate curing systems
Solution Approach 2:
The vinyl silane crosslinker acts as an intermediary that bridges the silane-terminated polymer and epoxy resin components, enabling simultaneous crosslinking of both polymer systems through a single curing mechanism that reduces process complexity
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 intumescent coatings with balanced passive fire resistance, flexibility, toughness, and adhesiveness, reducing weight and viscosity for various applications, while maintaining structural integrity and durability, and enhancing fire protection.
Implementation Method 1
a cross-linker for curing the silane-terminated polymer
Implementation Method 2
a cross-linker for curing the epoxy resin
Implementation Method 3
When subjected to a fire event an intumescent coating expands to form a protective char
Data Source
AI summary
A mixture curable to provide an intumescent coating material. The mixture comprises a silane-terminated polymer, a cross-linker for curing the silane-terminated polymer, an epoxy resin, a cross-linker for curing the epoxy resin, and an intumescent package.