Pulsed Infrared Coating Curing for Rapid Crosslinking
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Solution Overview
Problem
Current methods for curing coatings on substrates are time-consuming and energy-intensive, failing to provide enhanced properties such as abrasion resistance, corrosion resistance, and chemical resistance efficiently.
Innovation Solution
Applying pulsed infrared radiation with a peak wavelength between 3 μm to 10 μm and a pulse duration of less than 100 μs to a coating composition containing a film-forming resin and a crosslinking agent, which significantly reduces curing time and enhances the properties of the cured coating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional curing methods (oven baking) are used, then coatings achieve adequate curing, but processing time and energy consumption are excessive
Solution Approach 1:
The patent applies pulsed infrared radiation with pulse durations of less than 100 μs to cure coating compositions. This periodic action allows the coating to absorb energy in discrete bursts, achieving rapid crosslinking and curing without the continuous heating required by conventional oven baking methods, thereby dramatically reducing processing time while maintaining cure quality
Solution Approach 2:
The patent changes the curing parameters by using pulsed infrared radiation with peak wavelengths between 3-10 μm and pulse durations of less than 100 μs. This parameter change enables rapid energy delivery that heats and cures the coating almost instantaneously, transforming the curing process from a slow thermal diffusion process to a rapid localized energy absorption process
2Reliability
If conventional curing methods are used, then coatings are cured, but energy consumption is excessive
Solution Approach 1:
The pulsed infrared radiation delivers energy locally and directly to the coating composition, heating only the coating layer rather than heating an entire oven chamber. This localized energy delivery achieves effective curing while consuming significantly less energy compared to conventional oven baking that must heat large volumes of air and equipment
Solution Approach 2:
The patent replaces the mechanical thermal convection system of oven baking with electromagnetic radiation (infrared pulses). This substitution eliminates the need for continuous heating of air and oven components, directing energy only where needed in the coating, thereby dramatically reducing overall energy consumption while maintaining curing effectiveness
3Reliability
If conventional curing methods are used, then coatings are cured, but enhanced properties (microhardness, scratch resistance, chemical resistance) are not achieved
Solution Approach 1:
The pulsed infrared radiation delivers energy in intense, short-duration bursts that rapidly heat the coating to high temperatures necessary for complete crosslinking and enhanced property development. This periodic energy delivery achieves superior microhardness, scratch resistance, and chemical resistance by ensuring thorough curing without the prolonged exposure required by conventional methods
Solution Approach 2:
By changing the curing parameters to use pulsed infrared radiation with specific wavelength and pulse duration characteristics, the patent achieves more complete and uniform crosslinking of the coating matrix. This results in enhanced coating properties including improved microhardness, scratch resistance, and chemical resistance, while simultaneously increasing curing efficiency
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
This method achieves rapid curing with improved microhardness, scratch resistance, and chemical resistance, using less energy compared to traditional oven baking methods, while maintaining or exceeding the performance of conventionally cured coatings.
Implementation Method 1
applying pulsed infrared radiation having a peak wavelength in the range of from 3 μm to 10 μm at a pulse duration of less than 100 μs to the applied coating composition
Implementation Method 2
applying pulsed infrared radiation having a peak wavelength in the range of from 3 μm to 10 μm at a pulse duration of less than 100 μs to the applied coating composition to form a cured coating
Data Source
AI summary
The present disclosure relates to a method for coating a substrate by applying a coating composition on a surface of a substrate and applying a pulsed infrared radiation to form a cured coating. The present disclosure further relates to coated substrates obtained by such method. Moreover, the present disclosure concerns the use of a coating composition and use of pulsed infrared radiation.