▎ 摘　　要

NOVELTY - Low-density halogen-free flame-retardant graphene heat conducting silica gel comprises component A including 100 pts. wt. base material and 0.1-0.5 pts. wt. catalyst and component B including 5-15 pts. wt. hydrogen-containing silicone oil and 0.1-0.5 pts. wt. inhibitor, where the base material comprises 100 pts. wt. vinyl silicone oil, 10-50 pts. wt. phosphorus nitrogen flame retardant, 50-100 pts. wt. graphene mixed and 5-10 pts. wt. fumed silica and the amount of the component A and the component B is 10:1. USE - The low-density halogen-free flame-retardant graphene heat conducting silica gel is useful in high-power light-emitting diode and electric vehicle battery seals. ADVANTAGE - The heat conducting silica gel: is environmentally friendly; has self-extinguishing property, low density and good thermal conductivity; and free from harmful and irritating gases e.g. hydrogen halide when exposed to high temperature or combustion. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing low-density halogen-free flame-retardant graphene heat conducting silica gel, comprising: (i) mixing vinyl silicone oil, phosphorus nitrogen flame retardant, fumed silica and graphene and stirring to obtain a base material; (ii) taking the base material, adding catalyst, stirring and uniformly mixing to obtain component A, taking hydrogen-containing silicone oil, adding inhibitor, stirring and uniformly mixing to obtain component B; and (iii) uniformly mixing the component A and component B, degassing in a vacuum and vulcanizing.