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Title:
DAMPING ADHESIVE LAYERS FOR MICROSPEAKER DIAPHRAGMS
Document Type and Number:
WIPO Patent Application WO/2019/071379
Kind Code:
A1
Abstract:
Thin films are provided comprising a damping adhesive comprising a polysiloxane or mixture of polysiloxanes and exhibiting a tan delta of at least 0.42 for every temperature between 20 ℃ and 250 ℃ and a tan delta at 250 ℃ that is no more than 0.20 greater than the minimum tan delta measured in the range of 20 ℃ to 250 ℃； in some cases exhibiting a tan delta of at least 0.42 for every temperature between 20 ℃ and 200 ℃ and a tan delta at 200 ℃ that is no more than 0.08 greater than the minimum tan delta measured in the range of 20 ℃ to 200 ℃； in some cases obtained by crosslinking polysiloxane (s) by e-beam or peroxide. Microspeaker diaphragm materials, subassemblies and transfer tapes comprising such films are also provided.

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Inventors:
YANG CHAO (CN)
WALKER JR (US)
O'NEAL DANIEL J (US)
Application Number:
PCT/CN2017/105346
Publication Date:
April 18, 2019
Filing Date:
October 09, 2017
Export Citation:
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Assignee:
3M INNOVATIVE PROPERTIES CO (US)
YANG CHAO (CN)
International Classes:
C09J7/00; B32B25/04; B32B25/08; B32B27/06; B32B27/08; B32B27/16; C09J183/04; H04R7/06
Foreign References:
CN103738020A2014-04-23
CN107001877A2017-08-01
CN102232103A2011-11-02
CN102823274A2012-12-12
CN105814910A2016-07-27
US4678828A1987-07-07
US5268433A1993-12-07
Attorney, Agent or Firm:
TEE&HOWE INTELLECTUAL PROPERTY ATTORNEYS (CN)
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