B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
154/126.4
B32B 15/08 (2006.01) B32B 27/30 (2006.01) C08L 23/02 (2006.01) C08L 25/14 (2006.01)
Patent
CA 1256787
ABSTRACT A vibration-damping composite metal plate comprising two metal plates and a resin composition sandwiched between the metal plates, said resin composition consisting essentially of 20 to 70% by weight of an amorphous thermoplastic polymer (a), and 80 to 30% by weight of a crystalline thermpolastic polymer (b) incompatible with the polymer (a), at least one of monomers constituting the amorphous polymer (a) being graft or block copolymerized with the crystalline polymer (b) in an amount not less than 0.5% be weight based on a total amount of the polymer (a), the polymer (a) being at least one member selected from the group consisting of vinyl ester polymers, polymers of aromatic vinyl monomers and acrylic ester polymers, and having a glass transition temperature lower than that of the polymer (b) and having a maximum tan.delta. not less than 0.5 within a temperature range of -50 to 150°C and a frequency range of 0.1 to 20,000 Hz, and the polymer (b) being one member selected from the group consisting of crystalline .alpha.-olefin resins and crystalline condensation polymers, and having a melting point higher than the glass transition temperature of the polymer (a) and a sheer storage modulus not less than 1 x 108 dyne/cm2 at the temperature and frequency at which the polymer (a) exhibits the maximum tan.delta..
483506
Horie Shinji
Itsubo Akira
Ochiumi Masahide
Sekizuka Norihiro
Watanabe Yukichi
Mitsubishi Petrochemical Co. Ltd.
Nippon Kokan Kabushiki Kaisha
Ridout & Maybee Llp
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