Acoustics – Sound-modifying means – Mechanical vibration attenuator
Reexamination Certificate
2011-04-12
2011-04-12
San Martin, Edgardo (Department: 2832)
Acoustics
Sound-modifying means
Mechanical vibration attenuator
C181S209000
Reexamination Certificate
active
07921961
ABSTRACT:
A chromate-free resin composite damping material is provided having a multilayer structure. The material can include an viscoelastic resin composition provided between two metal plates as an intermediate layer, where the viscoelastic resin composition can include a thermosetting resin further including an amorphous copolymerizable polyester resin and a curing agent. A surfaces of each metal plate contacting the resin composition can be provided with a chromate-free adhesion boundary film which includes between about 5 and 50 mass % of silica, between about 5 and 50 mass % of a polyester resin, between about 1 and 50 mass % of tannic acid, and between about 0 and 30 mass % of a silane coupling agent. Such damping material can provide excellent durable adhesion properties.
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English translation of Korean Intellectual Property Office Notice of Preliminary Rejection.
Korean Office Action 9-5-2008-016954896.
English Language International Search Report for PCT/JP2005/022263.
Dorsey & Whitney LLP
Martin Edgardo San
Nippon Steel Corporation
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