METHYLENE-BIPHENYL-BRIDGED SILSESQUIOXANE WHITE LED ENCAPSULANT MATERIAL HAVING CONTROLLED REFRACTIVE INDEX

摘要

PURPOSE: A methylene-biphenyl-bridged silsesquioxane white LED encapsulant material is provided to obtain a silicon compound with excellent thermal stability, no yellowing, and high refractive index. CONSTITUTION: A method for preparing a methylene-biphenyl-bridged silsesquioxane white LED encapsulant material comprise the steps of: mixing a methylene-biphenyl-bridged compound of chemical formula 3, an organic solvent and a hydrochloric acid solution; and polymerizing the mixture to prepare the methylene-biphenyl-bridged silsesquioxane of chemical formula 1. In chemical formulas 1 and 3, R is -CH2-(C6H4)2-CH2-, R11 and R31~R36 are independently (C1-C4) alkyl group, and m is the integer of 2~1000.