THERMOPLASTIC FLAME RETARDANT RESIN COMPOSITION AND THE MANUFACTURING METHOD

摘要

The present invention relates: to a thermoplastic flame-retardant resin composition which does not exhaust dioxin and the like harmful to the human body when being burned, has very excellent molding-related characteristics while being flexible, and can be used for various applications, such as, a floor sheet and flooring materials, due to excellent thermal conductivity thereof; and to method for preparing same. According to the present invention, provided is a thermoplastic flame-retardant resin composition containing 70-80 parts by weight of a polyolefin resin, 10-30 parts by weight of silane-treated expanded graphite; and 0-10 parts by weight of a melanin-based flame-retardant. Further, the present invention provides a method for preparing a thermoplastic flame-retardant resin composition, comprising the steps of: treating expanded graphite with acid; treating the acid-treated expanded graphite with silane to prepare silane-treated expanded graphite; and mixing 10-30 parts by weight of the silane-treated expanded graphite and 0-10 parts by weight of a melanin-based flame-retardant, based on 70-80 parts by weight of a polyolefin resin, wherein the acid-treated expanded graphite is obtained by immersing expanded graphite in an acidic solution containing at least one of sulfuric acid, nitric acid, hydrochloric acid, and acetic acid to perform surface acid treatment at a predetermined temperature for a predetermined time, followed by drying; and wherein the silane-treated expanded graphite is obtained by adding silane or a silane solution to the acid-treated expanded graphite, followed by stirring and drying.