Excellent heat-dissipating black resin composition, method for treating a zinc coated steel sheet using the same and steel sheet treated thereby

A heat-dissipating black resin composition, comprising, based on 100 parts by weight of the heat-dissipating black resin composition:

• 10 to 60 parts by weight of a resin composition in which at least one main resin and a melamine-based curing agent are mixed in a weight ratio of 10:2-7, the main resin being selected from the group consisting of polyester resin, epoxy resin, polyolefin resin, polyurethane resin, fluorine resin, phenol resin, acryl resin and polycarbonate resin;
• 1 to 10 parts by weight of at least one pigment selected from the group consisting of carbon black and carbon nano tube;
• 1 to 10 parts by weight of a matting agent including silica and titania at a weight ratio of 9:1;
• 0.1 to 2 parts by weight of at least one selected from the group consisting of 3-aminopropyltriethoxy silane, 3-glycidoxypropyltrimethoxy silane, 3-methaglyoxypropyltrimethoxy silane, 3-mercaptopropyltrimethoxy silane, N-(beta-aminoethyl)-gamma-aminopropyltrimethoxysilane, gamma-glycidoxypropyltriethoxysilane and gamma-glycidoxytrimethyldimethoxysilane;
• 0.1 to 2 parts by weight of a phosphate-based additive;
• and
• a solvent.