North Coatings Industry Research Institute Successfully Develops Optical Fiber Coatings

The North Coatings Industry Research and Design Institute recently developed a fast curing polyimide coating for high temperature optical fiber. The researchers introduced a fluorine-containing segment and a reactive acrylic segment into the polyimide structure, making the fluorine-modified photosensitive polyimide excellent in solubility, low optical loss, dielectric constant, and hygroscopicity. The fluorine-modified photosensitive polyimide has high light sensitivity, the film loss rate after film formation is very small, and the main chain crosslinks after exposure, further improving the chemical stability of the polymer. Due to maintaining a relatively complete homopolystyrene structure, the coating has excellent thermal stability, good mechanical, electrical, chemical and photographic properties and extremely low thermal expansion coefficient of polyimide. According to coating technology and abstracts, this study also adopted a process of pre-iminolysis, which eliminated the dehydration and condensation process of the polyimide curing process, and introduced reactive high-efficiency photoinitiators in the coating to achieve the polymerization. Rapid curing of imides.

At present, the global fiber coating is basically monopolized by Dutch DSM. As a global optical fiber production and consumption country, China has a huge market demand. At present, there are few domestic fiber coating manufacturers, of which only Shanghai Feikai Company. Formed the scale, the successful development of the optical coating of the North Coatings Institute will further accelerate the localization of the product.