Quick-drying and Anti-corrosion two-component water-based coating composition, and coated substrate
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Solution Overview
Problem
Existing waterborne coatings struggle to simultaneously achieve fast drying, good humidity resistance, and corrosion resistance, failing to meet the performance requirements set by modern environmental regulations and market demands.
Innovation Solution
A two-component waterborne coating composition comprising an epoxy resin in the first component and an amine hardener in the second component, where the amine hardener includes moieties containing primary amine, secondary amine, and tertiary amine, along with epoxy groups, to form a cross-linked film with enhanced properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If waterborne coatings are used to meet environmental requirements, then VOC emissions are reduced, but drying speed and performance are insufficient compared to solvent-borne coatings
Solution Approach 1:
The patent changes the chemical parameters of the coating system by using water as the continuous phase instead of organic solvents, while adjusting the resin composition (epoxy resin with specific molecular weight and structure) and adding functional additives to achieve both environmental compliance and acceptable drying performance
Solution Approach 2:
The invention creates a composite waterborne coating system combining epoxy resin, polyamine hardener, and various functional additives (defoamers, wetting agents, thickening agents) to achieve multiple performance requirements simultaneously, including corrosion resistance, adhesion, and drying characteristics
2Ease of manufacture
If waterborne coating formulations are simplified, then manufacturing cost is reduced, but comprehensive performance (fast drying, humidity resistance, corrosion resistance) cannot be achieved
Solution Approach 1:
The coating system is divided into two separate components (Component A: epoxy resin with additives; Component B: polyamine hardener) that are mixed before application, allowing each component to be optimized independently while achieving synergistic performance in the final coating
Solution Approach 2:
The patent specifies particular parameter ranges for the epoxy resin (molecular weight, structure type) and polyamine hardener (amine value, molecular weight) to optimize the balance between manufacturing simplicity and performance requirements
3Productivity
If drying speed is increased in waterborne coatings, then productivity is improved, but humidity resistance and corrosion resistance deteriorate
Solution Approach 1:
The patent adjusts the water content, resin molecular weight, and crosslinking density parameters to achieve an optimal balance where the coating dries at an acceptable rate while maintaining sufficient moisture curing capability for long-term humidity resistance
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 exhibits fast drying, excellent humidity resistance, and corrosion resistance, meeting stringent environmental standards while maintaining low VOC content, suitable for use as a primer on various substrates.
Implementation Method 1
the amine hardener includes: (a) moieties containing primary amine and/or secondary amine, (b) moieties containing epoxy groups, and (c) moieties containing tertiary amine
Implementation Method 2
The composition exhibits fast drying, excellent humidity resistance, and corrosion resistance
Implementation Method 3
excellent humidity resistance
Data Source
AI summary
Disclosed is a fast-dry and corrosion resistant two-component waterborne coating composition, including a first component and a second component, where the first component includes an epoxy resin and the second component includes an amine hardener, where the amine hardener includes (a) moieties containing primary amine and/or secondary amine, (b) moieties containing epoxy groups, and (c) moieties containing tertiary amine. Further disclosed is a coated substrate, including a substrate and the two-component waterborne coating composition applied on at least a part of the substrate.