| abstract |
PURPOSE:An inexpensive flame-retardant sound insulating material having improved sound insulating properties and flame retardance, obtained by blending an ethylene-vinyl acetate copolymer with iron concentrate slag prepared as a by-product in a copper refining process, a halogen type organic flame retardant and antimony trioxide. CONSTITUTION:(A) 100pts.wt. ethylene-vinyl acetate copolymer having 15-70wt%, preferably 30-60wt% vinyl acetate content is blended with (B) 400-1,500pts.wt., preferably 600-1,200pts.wt. iron concentrate slag (one having preferably <=100 meshes, especially <=200 meshes particle size) prepared as a by-product in copper refining process, (C) 20-100pts.wt., preferably 30-60pts. wt. halogen type organic flame-retardant such as chlorinated paraffin, decabromodiphenyl ether, tetrabromobisphenol A, etc., and (D) 5-50pts.wt., preferably 10-30pts.wt. antimony trioxide. |