| abstract |
(57) [Summary] [Object] The present invention provides a viscoelastic foam, which is a vibration-proof material, which is formed of a specific viscous rubber admixture, and in addition, since open cells and closed cells are mixed, An object of the present invention is to provide a vibration-proof material that suppresses low-frequency vibration, is small and lightweight, has a high degree of freedom in design, and is inexpensive. [Structure] The present invention comprises a rubber (A), a softening agent (B), a filler of an inorganic filler and / or an organic filler (C), an organic foaming agent (D). A vibration-damping material comprising a viscoelastic foam obtained by vulcanizing and foaming a viscous rubber mixture containing a vulcanizing agent (E) and the rubber (A). 10 to 200 parts by weight of the softening agent (B) and 5 to 100 parts by weight of the inorganic filler and / or the organic filler (C). The viscoelastic foam containing 300 parts by weight is characterized in that the density is set to 0.2 g / cm 3 or less and that open cells and closed cells are mixed. |