Finish coat composition, composite material, middle frame of electronic device, housing of electronic device, and electronic device

A composite material, comprising:

• a plastic substrate layer;
• and
• a finish coat layer composited at the plastic substrate layer, wherein the finish coat layer is obtained by crosslinking and curing a finish coat composition;
• the finish coat composition comprises 30˜60 parts by mass of a film-forming resin, 5˜20 parts by mass of an acrylate monomer, 1˜10 parts by mass of a photoinitiator, 0.5˜10 parts by mass of a leveling agent, a matting powder to provide a matte effect, and 20˜50 parts by mass of a solvent, wherein:
• the leveling agent comprises a polyacrylate leveling agent,
• the matting powder comprises an organic modified chemically-precipitated silica or fumed silica;
• and
• the film-forming resin comprises one or more of acrylic resins and polyurethane acrylate resins.

A middle frame of an electronic device comprising:

• a composite material comprising:
• a plastic substrate layer,
• a finish coat layer composited at the plastic substrate layer, and
• an effect layer disposed between the plastic substrate layer and the finish coat layer, the effect layer providing a glare effect to the composite material,
• the finish coat layer being obtained by crosslinking and curing a finish coat composition;
• the finish coat composition comprising 30˜60 parts by mass of a film-forming resin, 5˜20 parts by mass of an acrylate monomer, 1˜10 parts by mass of a photoinitiator, 0.5˜10 parts by mass of a leveling agent, 0˜20 parts by mass of a matting powder, and 20˜50 parts by mass of a solvent, wherein:
• the leveling agent comprises a polyacrylate leveling agent,
• the matting powder comprises an organic modified chemically-precipitated silica or fumed silica;
• and
• the film-forming resin comprises one or more of acrylic resins and polyurethane acrylate resins.