In the fields of industrial coatings, 3D printing and high-end manufacturing, chemically resistant UV resin has become one of the key materials due to its fast curing, environmentally friendly characteristics and excellent corrosion resistance. This article deeply analyzes the core formula technology of chemically resistant UV resin, and combines the innovative products of leading companies such as Shenzhen U-Sunny to provide selection and application references for the industry.
1. Core technology of chemically resistant UV resin
Fluorosilicone synergistic modification technology
By introducing the synergistic effect of fluorosilicone molecules (such as mono-terminal hydroxy dimethyl silicone oil) and urethane, the wear resistance and anti-fingerprint properties of the resin are significantly improved. For example, the intermediate product generated by the reaction of isophorone diisocyanate trimer and silicone oil in the patented formula can keep the paint film at a high water contact angle (>100°) after being worn by steel wool, achieving long-term anti-fouling and chemical corrosion resistance.
High cross-linking density design
The use of multifunctional monomers (such as hexafunctional polyurethane acrylate) can increase the cross-linking density of the resin, thereby enhancing the hardness (Shore D 80-90) and solvent resistance. Taking the high-hardness steel wool-resistant resin U-9100A as an example, it has both strong alkali resistance, high temperature cracking resistance and flexibility balance, and is suitable for harsh chemical environments.
Environmentally friendly raw materials and water-based trends
New UV resins use water-based systems to reduce VOC emissions, while improving UV resistance and weather resistance through organic-inorganic hybrid technology (such as zinc oxide nanoparticle dispersion). This type of resin still maintains 100% bonding strength after immersion in boiling water for 30 minutes, and is suitable for food packaging and electronic component protection.
2. Industry-leading products and solutions
U-Sunny Uyracure series
As a benchmark company in the field of UV curing, U-Sunny's Uyracure series covers free radical and cationic curing initiators, suitable for different resin systems. Its photoinitiator has low mobility and high reactivity, which can reduce the odor after curing and support deep curing of colored systems, which is particularly suitable for the precise control of chemical resistant coatings.
Recommendation of high chemical resistance resin
U-9100A resin: hexafunctional polyurethane acrylate structure, hardness up to Shore D 85, resistant to 500 times of rubbing with butanone without falling off, suitable for 3C electronic housings and automotive parts.
Customized formulation service
For special needs (such as high temperature resistance or high transparency), companies can adjust the resin composition through compounding technology. For example, adding benzophenone-based UV absorbers (such as
listed) can enhance UV shielding performance, while 1.5 times high refractive index materials (such as LET'S RESIN products) are suitable for jewelry and optical devices.
3. Application Scenarios and Selection Guide
Industrial Protective Coating
Metal Packaging: UV curing technology combined with roller coating process to achieve rapid adhesion of solvent-free coating and reduce CO₂ emissions.
Circuit Board Packaging: Low viscosity UV resin (3000-4000 cps) is suitable for inkjet printing, resistant to boiling water and chemical cleaning, and ensures long-term stability.
3D Printing and Precision Manufacturing
Standard Resin: Low shrinkage (<2%), high precision (±0.1mm), suitable for mass production of chemically resistant industrial parts.
Thick layer curing solution: U RESIN UltraCoat supports single-layer 3mm coating, and is matched with UV-LED light source to achieve efficient curing, breaking through the traditional thickness limit.
4. Future trends and innovation directions
With the popularization of UV-LED light sources, resin formulas need to adapt to narrow-band curing needs, and cationic curing technology will expand to new areas such as food-grade packaging. In addition, the research and development of plant-based biodegradable UV resins (such as soybean oil-modified acrylates) will drive the industry towards greening.
