A Hydrogen-Containing Di-Phenyl Siloxane Cross-Linker for Ultra-High Hardness and High Refractive Index Silicone Resin and its Application in LED Encapsulation

摘要

Herein, a linear hydrogen cross-linker with a high hydrogen content was proposed in the study. The hydrogen-containing di-phenyl silicone oil (HDPSO) was fabricated by non-hydrolytic sol-gel reaction and ring-opening polymerization. After raw materials were mixed with vinyl base polymer, the cured sample showed ultra-high hardness (similar to 92 shore D), refractive index (similar to 1.542 at 633 nm), and transparency (similar to 92.6% at 450 nm). After lighting for 168 h at room temperature, the samples showed no yellowing phenomenon and the lumen depreciation was only 4.9%. The samples demonstrated outstanding reliability compared to other commercialized silicone materials. The HDPSO is a promising cross-linker candidate for reliable high-performance LED encapsulation.

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