In the field of photocuring technology, photosensitizers, as key functional materials, directly affect the curing efficiency and performance of the final product. With the increasing market demand for high-quality curing materials, additives with both high photosensitivity and low side effects have become the focus of industry attention. Low-yellowing thiophene photosensitizer PAS 20 came into being. Its unique thiophene derivative structure not only significantly improves the photoresponse efficiency, but also solves the pain point of traditional photosensitizers that easily cause yellowing, providing a better solution for the photocuring process.
Core features of the product
1. Excellent photosensitivity and low addition requirements
PAS 20 has a molecular weight of 165 and an absorption wavelength of 410nm. It can efficiently capture ultraviolet light energy and quickly start the photocuring reaction. Experimental data show that only 1% addition can significantly improve the photoinitiation efficiency of the system, and is suitable for cationic and free radical dual-curing systems. Its high sensitivity can reduce energy consumption and production costs, and is particularly suitable for application scenarios with strict requirements on process economy.
2. Significantly inhibit yellowing and ensure product appearance
Traditional photosensitizers often cause yellowing of materials due to side reactions during the curing process, affecting the aesthetics of the end product. PAS 20 optimizes its molecular structure, has excellent surface drying, and almost no yellowing occurs after curing. This feature makes it of great value in fields with strict requirements on appearance, such as clear coatings and high-chroma inks.
3. Ease of use and adaptability
PAS 20 is a light yellow crystal with a density of 1.05 g/cm³. It is recommended to pre-mix it into a 10% concentration solution before use to facilitate accurate addition and uniform dispersion. It has a wide range of compatibility and can be used in conjunction with a variety of photoinitiators to further improve the overall performance of the system.
Application areas
1. Photocurable coatings and inks
In UV coatings and inks, low-yellowing thiophene photosensitizer PAS 20 can effectively shorten the curing time while ensuring that the coating is colorless, transparent or colorful. For example, in wood paint or electronic screen protectors, its low yellowing properties can avoid the problem of appearance degradation after long-term use.
2. 3D printing and electronic packaging
Photocurable 3D printing resins require high precision and rapid prototyping. The high photosensitivity of PAS 20 can accelerate interlayer curing and improve printing efficiency. In the field of electronic packaging adhesives, its stable chemical properties help protect precision components from ultraviolet aging.
3. Medical and packaging materials
UV-curable adhesives for medical devices must meet biocompatibility and long-term stability requirements. The low side reaction characteristics of PAS 20 can reduce the risk of harmful substances precipitating. In addition, in food packaging printing, its safety meets relevant regulatory standards and provides support for green production.
Technical Parameters Overview
| Properties | Value/Description |
| Molecular Weight(MW) | 165 |
| Density(g/cm³) | 1.05 |
| Absorption wavelength | 410nm |
| Appearance Pale | yellow crystals |
| Recommended concentration | 1% (pre-prepared 10% solution) |
Advantages Summary
As a new generation of low-yellowing thiophene photosensitizer, PAS 20 redefines the performance standards of photocurable materials through three core advantages:
1. High-efficiency photoresponse: low addition amount achieves rapid curing and reduces overall costs;
2. Long-term stability: inhibits yellowing and extends product life;
3. Wide adaptability: compatible with multiple systems and expands application scenarios.
Its technical parameters and measured performance show that PAS 20 can not only meet the current industry's stringent requirements for photocuring efficiency, but also provide reliable support for the development of high value-added products. In the future, with the in-depth application of photocuring technology in new energy, microelectronics and other fields, the innovative value of low-yellowing thiophene photosensitizers will be further highlighted.
Conclusion
Against the background of continuous upgrading of photocuring technology, PAS 20 provides the industry with a solution that takes into account both performance and quality with its scientific structural design and precise functional positioning. Whether it is to improve the efficiency of existing processes or promote innovation in emerging fields, this photosensitizer will become an indispensable key material in the industrial chain.