NON-BITUMINOUS SOUND DEADENING MATERIAL

摘要

PCT No. PCT/AU92/00375 Sec. 371 Date Jan. 12, 1994 Sec. 102(e) Date Jan. 12, 1994 PCT Filed Jul. 23, 1992 PCT Pub. No. WO93/02021 PCT Pub. Date Feb. 4, 1993A sheet or pad of sound deadening material comprising: (a) a polymeric component free of bitumen or asphalt such as natural or synthetic rubber, PVC, chlorinated polyethylene or ethylene vinyl acetate copolymer; (b) a filler such as calcium carbonate, barytes, talc, mica, magnesium carbonate or silica; (c) a compatibilising agent such as ricinoleic acid; and a tackifier such as pine rosin. Formulations may include a flame retardant, a polar additive, a polymer anti-oxidant, a heat stabilizer for PVC and a lubricant. Methods for forming such sheets or pads and for applying such sheets or pads to a metal panel are also provided.