UV curing technology is widely used in 3D printing, electronic manufacturing, coating materials and other fields due to its high efficiency and environmental protection. Among them, the combination of UV resin and photoinitiator (such as sulfonium salt and iodonium salt) is the core to achieve rapid curing. This article will deeply explore the technical principles of sulfonium salt/iodonium salt, and combine the innovative products of Shenzhen Youyang Technology and U-Sunny to analyze its practical application in industry.
1. Sulfonium Salts and Ionium Salts: Technological Breakthroughs in Photoinitiators
Sulfonium Salts and Iodonium Salts are key components of cationic photocuring systems. They are activated by ultraviolet (UV) or visible light, releasing protonic acid (H⁺) to catalyze the polymerization of epoxy resins or vinyl ether monomers. Compared with traditional free radical curing, this type of photoinitiator has the following advantages:
Deep layer curing ability: Uniform curing can be achieved even in high-thickness materials (such as 0.25 inches).
Visible light response: By connecting chromophores (such as Bodipy, anthracene, etc.), sulfonium salts have achieved visible light and even near-infrared light activation, broadening the application scenarios.
Environmental resistance: The cured coating is resistant to chemical corrosion and UV aging, and is suitable for outdoor industrial environments.
2. UV resin product matrix of Shenzhen Youyang and U-Sunny
As leading companies in the field of domestic UV curing, Shenzhen Youyang Technology and U-Sunny have launched a number of high-performance resins, combined with sulfonium salt technology, to meet the adhesion needs of complex substrates:
Metal UV resin (such as U-Sunny T-7128)
Features: Designed for metal, glass, and ceramics, high adhesion and scratch resistance can be achieved without surface pretreatment.
Performance parameters: acid value ≤3mg KOH/g, hardness 80-85 Shore D, excellent boiling water resistance.
Application scenarios: food can coating, metal nameplates, electrical profiles, etc.
Glass UV resin (such as Trust 7133)
Advantages: low shrinkage, high double bond conversion rate, suitable for vacuum coating and high temperature environment.
Cationic curing UV resin
Innovation: Youyang Technology's Ultramodern series combines sulfonium salt photoinitiators, fast curing rate and environmental protection, suitable for flexible substrate coating.
3. Application Scenarios and Industry Case Studies
3D Printing: Standard Resin is widely used in the manufacture of industrial parts and handicrafts with its low viscosity of 180-350 cps and high precision.
Electronic Photoresist: Sulfonium salts are used as photoacid generators (PAGs) to improve pattern resolution in semiconductor lithography processes.
Sealants and Coatings: Products such as Flowseal UV Satin provide a wear-resistant and weather-resistant matte surface through UV-stabilized formulas.
4. Future Trends: Green Curing and Technological Innovation
Current research focuses on water-soluble sulfonium salts and sunlight activation technology to further reduce energy consumption and environmental pollution. Shenzhen Youyang and other companies are promoting UV curing technology to penetrate into high-end fields such as automobiles and aerospace by developing high-refractive index resins and acid- and alkali-resistant formulas.
The combination of sulfonium salts/iodonium salts and UV resins is reshaping the curing process of modern manufacturing. Shenzhen Youyang Technology and U-Sunny provide highly adaptable solutions for the industry with innovative products and localized services. Whether it is metal coating or precision electronics, choosing the right photoinitiator and resin will be the key to improving production efficiency and product quality.
