Epoxy Coating with Elastomeric Particles for Strong One-Component Bonds
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Solution Overview
Problem
Existing one-component coating compositions struggle to provide sufficient bond strength and ease of application for bonding substrate materials, particularly when activated by external energy sources.
Innovation Solution
A composition comprising an epoxy-containing component, elastomeric particles, and a curing component activatable by an external energy source, including guanidine with a D90 particle size of 25 μm, which forms a strong and durable bond when activated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If existing one-component coating compositions are used, then ease of application is maintained, but bond strength is insufficient
Solution Approach 1:
The patent modifies the chemical composition parameters by incorporating specific ratios of epoxy-containing component (45-90 wt%), elastomeric particles (11-25 wt%), and curing component (2-20 wt%). This parameter optimization enables the composition to achieve high bond strength while maintaining ease of application as a one-component system.
Solution Approach 2:
The patent creates a composite coating composition by combining epoxy resin, elastomeric particles, and curing agents into a single integrated formulation. This composite structure provides both the mechanical strength from epoxy and the flexibility from elastomeric particles, resolving the contradiction between strength and ease of application.
2Reliability
If high bond strength is achieved through composition optimization, then reliability improves, but manufacturing complexity increases
Solution Approach 1:
The patent merges multiple functional components (epoxy resin, elastomeric particles, curing agents) into a single one-component composition that can be applied directly without mixing. This consolidation maintains high reliability through optimized composition while simplifying the application process and reducing manufacturing complexity.
Solution Approach 2:
The patent performs preliminary action by pre-mixing all necessary components (epoxy, elastomeric particles, curing agents) in the correct proportions during manufacturing. This allows the composition to be stored and applied directly without现场 mixing, improving reliability while maintaining simple application procedures.
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 achieves high lap shear strength and displacement, with a hardness of greater than 100 N/mm² and elongation of at least 40%, and a shear stress of at least 33.0 MPa with a shear strain of at least 34.5%, suitable for various substrate materials including metals, ceramics, and composites.
Implementation Method 1
a curing component activatable by an external energy source, the curing component comprising at least one guanidine
Data Source
AI summary
Disclosed herein is a composition comprising: an epoxy-containing component, elastomeric particles in an amount of greater than 11% by weight to 25% by weight based on total weight of the composition; and a curing component activatable by an external energy source, the curing component comprising at least one guanidine having a D90 particle size of 25 μm measured by dynamic light scattering. Also disclosed is the composition in an at least partially cured state. Also disclosed is a method for treating a substrate comprising applying the composition to a surface of a substrate; and applying an external energy source to cure the composition. Also disclosed are substrates comprising the composition. Also disclosed are substrates formed by the method of the present invention.