Amino-Modified Epoxy Resin Coatings for Rusty Surfaces
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional epoxy coatings have limited overcoat window and surface tolerance, requiring extensive surface preparation and increasing application costs due to their inability to adhere well to slightly damp or rusted metal surfaces.
Innovation Solution
Development of amino compound-modified epoxy resin liquid compositions, specifically tris(hydroxymethyl)aminomethane (THAM) and urea-modified epoxy resin compositions, which enhance adhesion and overcoat window by improving the viscosity and reaction properties with phenolic compounds, allowing for better surface tolerance and extended overcoat window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional epoxy coatings are used, then good adhesion to properly prepared surfaces is achieved, but surface preparation must be extensive and costly
Solution Approach 1:
The patent modifies the chemical composition parameters of epoxy coatings by incorporating amino compounds (such as polyaminoamines, polyaminoamides, and polyamino carboxylic acids) in specific concentrations (0.1-10% by weight). This chemical parameter change enables the coating to adhere to surfaces with reduced preparation requirements while maintaining strong adhesion strength.
Solution Approach 2:
The invention creates a composite coating system by combining conventional epoxy resins with amino compound additives. This composite formulation integrates the adhesion benefits of amino compounds with the protective properties of epoxy, resulting in a material that achieves good adhesion with less stringent surface preparation.
2Reliability
If conventional epoxy coatings are used, then coating performance is maintained, but overcoat window is limited
Solution Approach 1:
The patent adjusts the chemical composition parameters by adding amino compounds that modify the curing and drying characteristics of epoxy coatings. This parameter modification extends the overcoat window while preserving the protective performance of the coating system.
3Strength
If surface tolerant epoxy coatings are developed, then adhesion to damp or rusted surfaces improves, but coating complexity increases
Solution Approach 1:
The patent modifies the epoxy coating formulation by incorporating specific amino compounds (polyaminoamines, polyaminoamides, polyamino carboxylic acids) in controlled concentrations. These parameter changes enhance adhesion to rusty and damp surfaces without requiring complex multi-component systems or specialized application equipment.
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 modified epoxy resin compositions significantly extend the overcoat window and improve surface tolerance, enabling better adhesion to rusty panels and reducing the need for extensive surface preparation, thus lowering application costs and enhancing long-term coating performance.
Implementation Method 1
a reaction product of: (a) at least one amino compound... and (b) at least one liquid epoxy resin compound
Implementation Method 2
The ability to adhere well to metal substrates... is a very important property of epoxy coatings
Data Source
AI summary
An amino compound-modified epoxy resin liquid composition including a reaction product of (a) at least one amino compound; and (b) at least one liquid epoxy resin compound having a low viscosity as measured at room temperature wherein the amino compound-modified epoxy resin liquid composition comprises a liquid has a low viscosity; a curable coating composition including (A) at least one of the above amino compound-modified epoxy resin liquid composition, and (B) at least one curing agent; a thermoset coating product prepared from the above curable composition; and a process for preparing the above amino compound-modified epoxy resin liquid composition, a process for preparing the above curable composition and a process for preparing the above coating.