Intumescent Coating Cold Flexibility via Low-MW Polymer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing intumescent coating systems face limitations in cold flexibility, impact resistance, and processing efficiency, particularly due to the need for complex manufacturing processes and restricted freedom in formulating thick layers and foam height control, with prior (meth)acrylate-based systems requiring solvents and having limited low-temperature flexibility.
Innovation Solution
A novel intumescent reaction resin system characterized by a liquid polymer with a molecular weight between 1500 and 35,000 g/mol and a glass transition temperature below 15 °C, incorporating vinylic monomers and a blowing agent, which eliminates the need for solid (meth)acrylate polymer components and allows for improved metal adhesion, impact resistance, and controlled foaming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-molecular-weight thermoplastic resins are used in intumescent coating systems, then fire protection performance is improved, but cold flexibility and impact resistance deteriorate at low temperatures
Solution Approach 1:
The patent changes the molecular weight parameter of the polymer from high-molecular-weight (>100,000 g/mol) to low-molecular-weight (1,000-35,000 g/mol), which fundamentally alters the material's mechanical properties. This parameter change enables the resin to maintain flexibility and impact resistance at low temperatures while still providing fire protection, resolving the contradiction between fire performance and cold flexibility.
2Ease of operation
If solvent or water content is increased to improve application properties, then ease of application is improved, but drying time increases
Solution Approach 1:
The patent extracts and eliminates the solvent or water component from the coating system, transitioning to a solvent-free formulation. This is achieved by using low-molecular-weight polymers that provide adequate application properties without requiring high solvent content, thereby eliminating the trade-off between application ease and drying time.
3Manufacturing precision
If sequential application from different sides is required to achieve complete coating, then coating completeness is improved, but processing time increases
Solution Approach 1:
The patent changes the viscosity parameter of the resin system by using low-molecular-weight polymers (1,000-35,000 g/mol), which provide optimal flow and leveling properties. This enables the coating to be applied in a single pass with complete coverage, eliminating the need for sequential application from different sides and significantly reducing processing time.
4Reliability
If solid (meth)acrylate polymer components are used, then fire protection performance is improved, but formulation freedom and manufacturing complexity worsen
Solution Approach 1:
The patent changes the molecular weight parameter from high to low, transforming the material from a solid polymer requiring dissolution and pre-formulation to a liquid or low-viscosity resin that can be directly formulated. This parameter change simplifies the manufacturing process, eliminates the need for complex dissolution steps, and provides greater formulation freedom while maintaining fire protection performance.
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 system achieves enhanced cold flexibility, improved metal adhesion, and increased degrees of freedom in additive formulation and foaming control, resulting in a more efficient and flexible intumescent coating with higher foam quality and reduced processing time.
Implementation Method 1
a liquid polymer with a mean molecular weight Mn between 1500 and 35,000 g/mol and a glass transition temperature below 15 °C
Implementation Method 2
at least one component that acts as a blowing agent at temperatures above 200 °C
Implementation Method 3
A coating produced from this intumescent formulation can be cured by polymerization
Data Source
AI summary
The present invention relates to a new reaction system for intumescent coating. Intumescent coatings are used, in particular, in fire control for metallic components, such as girders in building construction. In the event of fire, these coatings reactively expand, forming a fire-resistant insulating layer with low thermal conductivity around the metal girder and delaying a premature, thermally induced failure of this component by the insulation thus formed. The invention particularly relates to resin systems having improved low-temperature flexibility which ensure good adherence to metal and shock resistance even at low temperatures while avoiding the polymer components which are normally used in resin systems.