Other

Masao Sumita

Cheng Zhang

Tadashi Miura

Tadao Tokushima

Tetsuya Ito

Guozhang Wu

An organohybrid-based damping material for controlling unwanted vibration and noise, an organic damping improver exhibiting piezoelectric, dielectric and electroconductive effects, and their producing methods, are provided. The damping material comprises a polymer matrix having a polar side chain and a damping improver composed of a compound containing basic nitrogen and a phenol-based compound. The damping material shows an excellent damping properties, alleviates the functional deterioration, and is applicable to different application temperature regions and wide areas.

Organohybrid-based damping material, method for producing the same, and damping improver for damping material

Coating composition for vibration damping, and method for producing the same

Organohybrid-based damping material, method for producing the same, and method for damping using the same

A damping material having a loss factor tan .delta..gtoreq.1 and a small strain amplitude dependence, which is formed by dispersing an organic series dielectric or ferroelectric material in a non-dielectric polymer to have an acicular form wherein the acicular ratio is 5 or more, and the diameter of the acicular dielectric or ferroelectric material is 20 .mu.m or less when it takes a circular acicular form, or a side in cross section of the acicular dielectric or ferroelectric material is 20 .mu.m or less when it takes a rectangular acicular form. The volume ratio of the dielectric or the ferroelectric material to the non-dielectric polymer is preferably 0.3 to 0.7.

Piezoelectric dispersion type organic damping composite

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Ayase-shi, Kanagawa, Japan

Masao Sumita