| abstract |
(57) [Problem] To provide a flame-retardant heat-conductive and electrically insulating pressure-sensitive adhesive sheet excellent in flame retardancy, thermal conductivity and adhesiveness. A pressure-sensitive adhesive sheet comprising a support and a pressure-sensitive adhesive layer laminated on at least one of the supports, wherein the support has (i) a (meth) alkyl having an alkyl group having 1 to 14 carbon atoms. Polymer 100 obtained by polymerizing acrylate Parts by mass, and ii) 200 to 500 parts by mass of the thermally conductive electrically insulating particles, and at least 100 parts by mass of the thermally conductive electrically insulating particles have flame retardancy; iii) non-adhesive at room temperature Shows the properties, the pressure-sensitive adhesive layer, an acrylic copolymer comprising a polar vinyl monomer copolymerizable with a (meth) alkyl acrylate having an alkyl group having 4 to 14 carbon atoms, the flame-retardant particles 50 to 50 A flame-retardant heat conductive and electrically insulating adhesive sheet containing 250 parts by mass. |