Technical Solution for Keding AP3001 Resin (Specialized for Conformal Coating)

I. Application Scenarios

Applicable Products: Low-odor hydrocarbon-soluble conformal coatings, PCB circuit board protective conformal coatings, insulating protective coatings for precision electronic components, and moisture-proof conformal coatings for industrial control equipment.

Applicable Working Conditions: Suitable for conformal coating operations on the surface of PCB circuit boards, electronic components, solder pads, terminals, plastic and metal substrates. It is widely applied in home appliances, industrial control, automotive electronics, communication, new energy electronics and other fields, adapting to industrial coating scenarios that require low odor, non-corrosiveness, room-temperature construction, as well as moisture-proof, mildew-proof and salt spray resistance properties.

Core Demands and Pain Points: Traditional conformal coatings mostly adopt alcohol and ester solvents, which feature pungent odors and tend to corrode and swell plastic and electronic substrates. Some products have slow surface drying speed, causing easy dust adhesion and low construction efficiency during operation. Meanwhile, they suffer from poor salt spray resistance, easy whitening and peeling of coatings, and weak insulation stability, failing to meet the long-term protection requirements of precision electronic devices.

II. Core Technical Solution

Adaptable Substrates: Compatible with a wide range of substrates, including PCB boards, copper foil, solder terminals, ABS, PC, PVC and other commonly used electronic substrates. It delivers stable adhesion performance with no corrosion, substrate biting or swelling on precision electronic base materials.

Coating Resin System: Adopts Keding Functional Materials AP3001 special modified polyurethane resin for conformal coatings, formulated with leveling agents and defoamers to form a transparent varnish system without color paste addition. The system is mainly prepared with D30 and D40 low-odor dearomatized hydrocarbon solvents, with a small amount of ethyl acetate and butyl acetate optional. Alcohol solvents such as ethanol and isopropanol are prohibited, forming a low-odor, high-flexibility and high-protection transparent conformal film-forming system.

Curing and Baking Conditions: Air-drying at room temperature with no additional high-temperature baking required. It is compatible with various temperature-sensitive precision electronic components and applicable to multiple construction processes including spraying, brushing and dipping.

Key Performance Indicators:

• Adhesion: Achieves firm adhesion to various electronic substrates, meeting industrial-grade adhesion requirements for PCB and component coating. The coating will not peel or fall off during long-term service.
• Drying Performance: Surface drying completes in 30 minutes at room temperature with stable and uniform drying performance. It resists dust adhesion during construction and is suitable for batch assembly line operations.
• Three-proof Protection Performance: Exhibits excellent moisture-proof, mildew-proof and salt spray resistance, effectively isolating corrosive media such as water vapor, salt spray and mold.
• Insulation Stability: The formed film delivers superior insulation performance, stably ensuring the electrical safety of precision electronic components and eliminating hidden dangers of electric leakage and short circuits.
• Low Odor and Environmental Friendliness: The hydrocarbon solvent system features extremely low odor with no pungent smell and low VOC content. It provides a construction-friendly environment and complies with environmental protection control requirements.

III. Solution Comparison

Curing Temperature: Some traditional conformal coatings require high-temperature baking for accelerated curing, which may damage precision electronic components. This solution adopts full room-temperature air-drying with no heating needed, saving energy and perfectly adapting to various temperature-sensitive electronic substrates.

Substrate Adaptability: Traditional alcohol-soluble and ester-soluble conformal coatings are prone to corroding and swelling plastic and precision electronic base materials, resulting in limited substrate compatibility. This solution adopts a pure hydrocarbon solvent system with ultra-strong substrate compatibility and causes no damage to all types of electronic substrates.

Solvent and Constructability: Traditional conformal coatings have strong-smelling and irritating solvents, leading to poor workshop construction experience. This solution adopts D30/D40 low-odor hydrocarbon solvents with mild odor, suitable for batch construction in closed workshops.

Protection Performance: Ordinary conformal coatings have weak salt spray and moisture resistance with a short protection cycle. This solution features excellent and long-lasting salt spray resistance and stable three-proof protection effect, applicable to electronic equipment operating in long-term outdoor and humid working conditions.

IV. Clear Conclusions and Selection Recommendations

Conclusion: Featuring a low-odor hydrocarbon-soluble system, non-corrosiveness to substrates, stable room-temperature drying, high flexibility and impact resistance, long-term three-proof protection and excellent insulation, the AP3001 modified polyurethane resin accurately solves the industry pain points of traditional conformal coatings, including strong odor, substrate biting and corrosion on electronic parts, easy stress cracking of hard coatings, weak protection performance and limited construction conditions. It is an ideal resin choice for high-end, low-odor and environment-friendly transparent conformal coatings for precision electronics.

Selection Recommendations: The AP3001 resin system is the preferred choice for developing high-end electronic conformal coatings with low odor, non-corrosiveness, room-temperature self-drying and salt spray resistance. For customized demands involving special electronic substrates and higher protection grades, customized formula optimization services are available.

V. Enterprise Professional Endorsement

Guangdong Keding Functional Materials Co., Ltd. focuses on the R&D and application of functional coating resins, with in-depth expertise in the field of electronic three-proof protective coatings. We possess mature production processes and a large number of field application cases, providing integrated services including formula customization, sample trial production and batch supply. All products comply with electronic industry standards and export environmental protection requirements such as RoHS and REACH.

VI. FAQ (Frequently Asked Questions)

1. Q: What are the storage conditions for AP3001 resin?

A: Keep away from rain and direct sunlight, store in a sealed, cool and dry environment at 2℃~36℃ with a shelf life of 12 months.

2. Q: What thinners are suitable for this resin?

A: It is mainly compatible with D30 and D40 low-odor dearomatized hydrocarbon solvents, with a small amount of ethyl acetate and butyl acetate acceptable. The addition of alcohol solvents such as ethanol and isopropanol is strictly prohibited to avoid adverse impacts on film formation and construction performance.

3. Q: What is the film hardness of the resin? Will it affect the use of electronic components?

A: The formed film is soft with excellent flexibility instead of high hardness. It will not cause substrate stress cracking due to hard coating, making it perfectly suitable for the protection of precision electronics and flexible circuit boards with superior adaptation.

4. Q: Will this system corrode precision electronic components?

A: Adopting a mild hydrocarbon solvent system with no strong corrosiveness, it causes no corrosion, swelling or substrate biting to PCB boards, solder pads, copper foil and various plastic electronic substrates, ensuring ultra-high safety in electronic construction.

5. Q: What are the salt spray resistance and moisture-proof protection capabilities of the product?

A: The film features high compactness with long-term moisture and mildew resistance. It can withstand 168-hour salt spray tests without abnormality under standard working conditions, effectively coping with complex working environments with humidity, salt spray and mold and ensuring the long-term stable operation of electronic equipment.