| 摘要 |
<p>1482027 Laminates J GOLE 18 Dec 1974 [20 Dec 1973] 54641/74 Heading B5N [Also in Division C3P] Polyisoprene having at least 60% 1,2- and 3,4- addition structure, or a composition made from such, is used as a vibration damping material; to this end it is bonded to a support sheet, e.g. of metal. Examples relate to the material as such, a vulcanizate optionally containing carbon or calcium carbonate filler, a mixture with natural, SBR or butyl rubber and a block copolymer of polybutyl methacrylatepolyisoprene-polybutyl methacrylate. It may be bonded to a sheet steel plate or sandwiched between two such plates.</p> |
