Fabrication of Transparent UV-Cured Coatings with Allyl-Terminated Hyperbranched Polycarbosilanes and Thiol Silicone Resins

• Published in: ACS omega Vol. 5; no. 25; pp. 15311 - 15316
• Main Authors: Wu, Yufei, Liu, Jiangling, Cheng, Fei, Jiao, Xiaojiao, Fan, Yunxin, Lai, Guoqiao, Luo, Mengxian, Yang, Xiongfa
• Format: Journal Article
• Language: English
• Published: American Chemical Society 30-06-2020
• ISSN: 2470-1343; 2470-1343
• DOI: 10.1021/acsomega.0c01338

To improve thermal stability and hardness of UV-cured materials, a series of UV-cured solvent-free coatings were prepared from allyl-terminated hyperbranched polycarbosilanes and thiol silicone resins. The silicone coatings prepared have pencil hardness of 4–9 H, water absorption no more than 0.04 wt %, and transmittance higher than 94%. The temperature for the coatings’ starting thermal decomposition is higher than 236 °C; especially, that of the coating prepared with G1 is as high as 371.1 °C. The UV-cured coatings in this work exhibit much higher pencil hardness than and superior thermal stability to those reported previously.