▎ 摘　　要

NOVELTY - A thermally conductive adhesive is obtained by stirring, mixing and in-situ polymerizing environmentally-friendly acrylate resin, environmentally-friendly solvents, processing additives, core-shell graphene/polymer composite microspheres and alkenyl-modified inorganic nano thermal conductive materials. After the thermally conductive adhesive with light diffusion function is cured, the haze is not less than 80%, the transmittance is not less than 50%, and the thermal conductivity is not less than 1 W/(m.K). The environmentally-friendly acrylate resin is prepared by dissolving 25-65 wt.% acrylate monomer or acrylic modified epoxy resin, 10-40 wt.% vinyl silicone monomer, 5-40 wt.% olefin monomers and 0-30 wt.% alkenyl aromatic monomers in 20-60 wt.% environmentally-friendly solvents, and performing solution polymerization method using 0.1-1 wt.% thermal initiator or redox initiator, to obtain environmentally-friendly acrylate resin with solid content of 40-80 wt.%. USE - Thermally conductive adhesive used in light diffusion function protective coatings or adhesives for lighting equipment, liquid crystal displays, and LED equipment (all claimed). ADVANTAGE - The thermally conductive adhesive is environmentally-friendly and has excellent safety, moisture resistance, heat resistance, rapid curing property, storage stability and bonding strength. DETAILED DESCRIPTION - A thermally conductive adhesive is obtained by stirring, mixing and in-situ polymerizing 10-90 wt.% environmentally-friendly acrylate resin, 0-40 wt.% environmentally-friendly solvents, 0-20 wt.% processing additives, 5-40 wt.% core-shell graphene/polymer composite microspheres with particle size of 100 nm-100 mu m and remainder of alkenyl-modified inorganic nano thermal conductive materials with a particle size of 1-100 nm. After the thermally conductive adhesive with light diffusion function is cured, the haze is not less than 80%, the transmittance is not less than 50%, and the thermal conductivity is not less than 1 W/(m.K). The environmentally-friendly acrylate resin is prepared by dissolving 25-65 wt.% acrylate monomer or acrylic modified epoxy resin, 10-40 wt.% vinyl silicone monomer, 5-40 wt.% olefin monomers and 0-30 wt.% alkenyl aromatic monomers in 20-60 wt.% environmentally-friendly solvents, and performing solution polymerization method using 0.1-1 wt.% thermal initiator or redox initiator, to obtain environmentally-friendly acrylate resin with solid content of 40-80 wt.%. The core-shell structured graphene/polymer composite microspheres are prepared by dispersing 25-65 wt.% alkenyl modified graphene, 25-65 wt.% acrylate monomers, 1-20 wt.% alkenyl crosslinkable monomer, 30-60 wt.% alkenyl aromatic compound monomers, 1-10 wt.% surfactant in 20-60 wt.% water, and performing emulsion polymerization, dispersion polymerization or suspension polymerization copolymerization, to obtain a polymer with particle size of 100-100 mu m as the core and graphene as the shell. An INDEPENDENT CLAIM is included for manufacture of the conductive adhesive, which involves (i) preparing the core-shell structure graphene/polymer composite microspheres by (i-1) adding 1 pt. wt. graphene oxide and/or graphene, 0-2 pts. wt. optional additives, and 0.01-0.5 pts. wt. alkenyl compound into 10-1000 pts. wt. dispersion medium, reacting for 0.1-72 hours at 5-300 degrees C, chemically grafting the alkenyl group on the graphene sheet to obtain alkenyl-modified graphene, (i-2) adding the alkenyl-modified graphene with acrylic monomers, alkenyl crosslinkable monomers, alkenyl aromatic compound monomers and surfactants to the water and mixing, stirring and emulsifying at 100-2000 rpm, (i-3) subjecting the obtained compound at 100 degrees C or less, subjecting the obtained product to emulsion polymerization, dispersion polymerization, and suspension polymerization copolymerization for 1-100 hours at a speed of 100-1500 rpm, (i-4) separating and washing the product to obtain core-shell structure graphene/polymer composite microspheres, (ii) preparing the thermally conductive adhesive by (ii-1) by adding core-shell structure graphene/polymer composite microspheres, acrylic monomers or acrylic modified epoxy resins, vinyl silicone monomers, olefin monomers, alkenyl aromatic compound monomers and optional blending resins to environmentally-friendly solvents and processing additives and mixing, and stirring evenly at 100-1500 rpm and at 5-100 degrees C, (ii-2) adding thermal initiator or redox initiator, optional additive agent to optional solvent and mixing, and stirring evenly at 100-5000 rpm, and (ii-3) adding the product obtained in step (ii-1) to the product obtained in step (ii-2), and performing a solution polymerization reaction at a speed of 100-1500 rpm for 1-100 hours.