KRAYDEN offers a range of coatings, powders and resins for electronic, electrical, automotive and industrial applications. These materials are used to provide electrical insulation, protect components from the environment and support long-term performance. Epoxy coating powders are used for applications such as motors, busbars, magnetic cores and passive electronic components. They can provide a durable protective coating while also supporting electrical and thermal performance. Conformal coatings are applied to printed circuit boards and electronic assemblies to help protect against moisture, dust, chemicals and other environmental conditions. Thinners are used with compatible coating systems to adjust viscosity and support application by spray, dip or brush methods. Together, these materials support a wide range of protection and insulation needs across different applications and manufacturing processes. KRAYDEN can help identify the right material based on the application, required performance and processing requirements.
Coating Powders, Paints & Varnishes
Functional and decorative thermoplastic and thermoset plastic coating powders
Coatings, powders & Resins
Frequently asked questions
Frequently Asked Questions about Coatings, Powders, and Resins
What are coatings, powders, and resins used for?
Coatings, powders, and resins are used to protect, insulate, seal, and enhance components across a wide range of electronic, electrical, automotive, and industrial applications. Depending on the material, they may provide electrical insulation, environmental protection, mechanical protection, or improved durability.
What types of coatings, powders, and resins are available?
Available materials include epoxy coating powders, conformal coatings, specialty resins, and supporting process materials such as thinners. The right material depends on the performance and processing requirements of the application.
How are coatings, powders, and resins applied?
Application methods vary by material and can include spraying, dipping, brushing, electrostatic coating, fluidized-bed coating, casting, potting, and encapsulation. The recommended application method depends on the product, part geometry, required coating thickness, and manufacturing process.
How do I choose the right coating, powder, or resin?
Material selection typically depends on factors such as the substrate, operating temperature, electrical requirements, environmental exposure, cure conditions, application method, and required finished properties. Reviewing the technical requirements of the application can help identify the most suitable material.
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Understanding Coatings, Powders & Resins
Coatings, powders and resins are used to protect components, provide electrical insulation, improve environmental resistance and support reliable performance in demanding electronic, electrical and industrial applications.
Krayden offers solutions across epoxy coating powders, conformal coatings and specialty thinners. Each material serves a different purpose and can be selected based on the component, application method and required performance.
Epoxy Coating Powders
Functional coating powders used for applications requiring electrical insulation, mechanical protection and durable encapsulation. Applications include busbars, motor armatures, passive electronic components and magnetic cores.
Conformal Coatings
Thin protective polymer coatings applied over electronic assemblies to help protect against moisture, chemicals, dust and other environmental conditions. Available chemistries include acrylic, silicone, urethane, synthetic rubber and UV-curable systems.
Thinners & Process Materials
Specialty thinners help control conformal coating viscosity, flow and application characteristics. The correct thinner can help support consistent film thickness during processes such as spraying, dipping and brushing.
Coatings, Powders & Resins at a Glance
| Material Type | Primary Purpose | Common Applications | Typical Application Methods |
|---|---|---|---|
| Epoxy Coating Powders | Electrical insulation and component protection | Busbars, motors, magnetic cores and passive electronic components | Electrostatic spray and fluidized-bed coating |
| Conformal Coatings | Environmental protection for electronic assemblies | Printed circuit boards, electronic assemblies and components | Spray, dip, brush and automated application |
| Thinners | Adjusting coating viscosity and supporting application | Conformal coating and related coating processes | Used with compatible coating systems as required by the process |
Epoxy Coating Powder Applications
Krayden supplies epoxy coating powders for a wide range of electrical insulation, encapsulation and component protection applications. Product requirements can vary depending on component geometry, electrical requirements, thermal class and coating process.
Busbars, Switchgear Equipment & High Voltage Fuses
For many years Krayden has supplied a range of epoxy coating powders developed for medium voltage (600V – 38,000V) bus bar and switch gear applications. Krayden is one of the few epoxy coating powder manufacturers with "switch panel-rated" material, meaning that their epoxy coating powders are qualified for use in Power Distribution Switch Boards.
Given the critical nature of the application and the time and costs involved in UL certification, major Power Management Companies rely on Krayden and their family of UL-listed epoxy coating powders. All the products offered by Krayden for busbar applications are UL-listed.
Motor Iron Armatures & Stators
Krayden supplies a range of epoxy coating powders developed for motor iron armatures. From extended bed life epoxy powders to high productivity coating powders and Class H-rated materials, Krayden has coating powder options for a wide range of motor armature insulation applications.
All the products offered by Krayden for motor iron armature applications are UL-listed.
Resistors, Capacitors, Varistors & Passive Electronics
Krayden supplies a range of epoxy coating powders developed for electrical insulation of passive electronic devices including resistors, varistors and capacitors.
From thermal cycle materials for Class 1 rated ceramic capacitors to lower cost epoxy coating powders for film wrap capacitors, Krayden offers materials developed for a variety of passive electronic applications. Most of the products offered by Krayden for passive electronics have a UL listing.
Toroids, Magnetic Cores & Pot Cores
Krayden supplies a range of epoxy coating powders developed for toroids, magnetic cores and powder cores. These products offer low shrinkage and low moisture absorption to help maintain the stability and inductance values of the toroid cores. They are suitable for Molypermalloy (MPP), iron, Sendust and other alloy powder cores. Most of the products offered by Krayden for powder cores have a UL listing.
Krayden also supplies epoxy coating powders developed specifically to act as an epoxy binder resin for pot cores. These materials provide green strength that allows the component to be transported from the press to the oven. Once cured, these pot cores can be used at temperatures up to 180°C while maintaining their mechanical and magnetic properties.
Common Epoxy Coating Powder Applications
Epoxy coating powder requirements can vary depending on the component, operating environment and manufacturing process. The table below highlights some of the common applications supported by Krayden.
| Application | Use of the Coating Powder | Important Considerations |
|---|---|---|
| Busbars & Switchgear | Electrical insulation and protection of power distribution components | Electrical performance, coating thickness and applicable UL requirements |
| Motor Armatures & Stators | Slot insulation and protection of motor components | Thermal class, cure conditions and production speed |
| Passive Electronics | Electrical insulation and protection of resistors, capacitors and varistors | Thermal cycling, electrical performance and component design |
| Toroids & Magnetic Cores | Insulation and protection while supporting magnetic component performance | Shrinkage, moisture absorption and magnetic stability |
| Pot Cores | Use as an epoxy binder resin in pressed magnetic components | Green strength, cure conditions and operating temperature |
Methods of Applying Coating Powders
Electrostatic Spraying of Epoxy Coating Powder
Coating powders can be applied using an electrostatic gun. In these cases, the powder is positively charged and the part being coated is negatively charged. This allows a thin, uniform coating to be applied to the part.
The advantage of this approach is that the powder can be wiped off and reapplied if the coating is not correct or if the masking was done incorrectly. Since the coating powder is only attached by a static charge before curing, it can be removed and reapplied. The thickness of the coating can also be adjusted based on the application process.
Once the part is electrostatically coated, it is moved to an oven where the coating powder is cured in place, leaving a smooth and uniform coating over the part.
Electrostatic Fluidized Bed Application of Coating Powder
Applying coating powder using an electrostatic fluidized bed is a practical way to apply a uniform powder coating on motor iron armatures.
Similar to electrostatic spray application, the part and powder are charged. The powder is applied as the parts move on a rotating screw over the fluidized bed. The powder adheres to the motor armature through static electricity. As the parts roll past the fluidized bed, a brush removes coating powder from areas where it is not wanted.
Once the excess coating powder has been removed, the parts are rolled over an induction cure copper element where the motor armatures can be exposed to temperatures of up to 240°C for a few seconds to fix and cure the coating powder in place.
Conformal Coatings
Conformal coatings are thin protective polymer films applied over printed circuit boards, electronic assemblies and components. The coating follows the contours of the assembly while helping protect sensitive electronics from moisture, dust, chemicals and other environmental conditions.
Krayden offers several conformal coating chemistries including acrylic, silicone, urethane, synthetic rubber and UV-curable systems. The right chemistry depends on the environment the assembly will experience as well as the required flexibility, temperature resistance, cure method and manufacturing process.
Acrylic
Versatile conformal coatings commonly used for electronics protection and straightforward application, cure and rework.
Silicone
Flexible protective coatings suited to applications requiring temperature resistance and environmental protection.
Urethane & Synthetic Rubber
Protective coating systems used where moisture resistance, flexibility and environmental protection are important.
UV-Curable
Rapid-curing systems designed to support higher-throughput electronics manufacturing and automated production.
Common Conformal Coating Application Methods
Conformal coatings can be applied in several ways depending on the coating chemistry, assembly design, production volume and required film thickness. Always follow the application and cure recommendations for the specific product being used.
| Application Method | How It Is Used | Process Considerations |
|---|---|---|
| Spray | Coating is atomized and sprayed over the electronic assembly. | Viscosity, spray settings and masking should be controlled to achieve uniform coverage. |
| Dip | The assembly is immersed into the coating and then withdrawn at a controlled rate. | Viscosity and withdrawal speed can affect film thickness and coating uniformity. |
| Brush | Coating is manually applied to specific areas of the assembly. | Often useful for smaller production volumes, touch-up and localized application. |
| Automated / Selective | Automated equipment applies coating only to selected areas of the board. | Useful for controlled production processes where repeatability and selective coverage are important. |
Cure requirements also vary by product. Depending on the chemistry, coatings may cure at room temperature, with heat or through UV exposure. Surface preparation, coating thickness and cure conditions can all affect the final performance of the coating.
Thinners & Supporting Process Materials
Conformal coating thinners are formulated solvent blends used to adjust coating viscosity and application characteristics. The right thinner can help improve flow, leveling and film consistency during the coating process.
Thinners are formulated to work with specific coating chemistries. The recommended thinner should always be used for the coating being applied since solvent compatibility and evaporation rate can affect application behavior and the finished coating.
How Thinners Support the Application Process
The amount of thinner required depends on the coating, application equipment and process conditions. Thinners may be used differently depending on whether the coating is sprayed, dipped or brushed.
| Process | Role of the Thinner | Why It Matters |
|---|---|---|
| Spray Application | Reduces viscosity to help the coating atomize and flow through spray equipment. | Helps support even coverage and a consistent finished film. |
| Dip Coating | Helps maintain the viscosity required for controlled immersion and withdrawal. | Viscosity can influence coating thickness, drainage and overall coverage. |
| Brush Application | May be used to adjust flow and make the coating easier to apply manually. | Supports smoother application during touch-up or localized coating. |
| Equipment & Process Control | Compatible thinners may also be used to support process consistency and equipment cleaning. | Helps maintain a repeatable coating process as solvent conditions change during production. |
When Thinners May Be Used
- Adjusting coating viscosity for spray application
- Maintaining viscosity during dip coating processes
- Supporting coating flow and leveling
- Controlling film thickness
- Matching the coating to the application equipment and process
- Supporting consistent processing as solvent evaporates from an open system
- Cleaning compatible tools, lines or application equipment where recommended
Thinner selection should be based on the specific conformal coating being used. Different coating chemistries require different solvent blends, so substitutions should not be made without confirming compatibility with the coating manufacturer.
How to Select the Right Coating, Powder or Resin
The appropriate material depends on both the performance required from the finished component and the manufacturing process used to apply and cure the material. Product-specific technical data should always be reviewed before final selection.
- What component, assembly or substrate is being coated?
- Is electrical insulation required?
- What operating and processing temperatures will the material experience?
- What coating thickness is required?
- Will the coating be sprayed, dipped, brushed or applied as a powder?
- What cure method and production cycle are available?
- Will the finished part be exposed to moisture, chemicals or other environmental conditions?
- Are thermal cycling or mechanical protection requirements important?
- Are UL, flammability or other regulatory requirements applicable?
- Does the application require a specific color, appearance or surface finish?
Need Help Selecting a Material?
Krayden's technical team can help review your application requirements and identify coating, powder, resin or process-material options suited to your manufacturing process.
Contact KraydenTechnical Resources & Application Guides
Coating Powder for Motor Iron Armature Insulation
Krayden offers a range of coating powders for slot insulation including blue, black and green variants and Class H candidates.
Technical Papers & Brochures
Krayden offers a wealth of Technical Papers, Marketing Brochures, Technical Data Sheets and SDS covering our coating powders, paints and varnishes.
Read our Blog on Coating Powders
We try to post as much information as we can on our blogs to help you find more relevant information about how to select, use and apply coating powders, varnishes and paints.
Coating Powders for Busbar Insulation
Krayden offers a range of epoxy coating powders for busbar and power distribution insulation.
