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Title:
MILLABLE SILICONE RUBBER COMPOSITION AND ELECTRIC-FIELD RELAXATION LAYER
Document Type and Number:
WIPO Patent Application WO/2019/077811
Kind Code:
A1
Abstract:
The present invention provides a millable silicone rubber composition characterized by comprising: (A) two raw alkenylated organopolysiloxane rubbers (A-1) and (A-2), i.e., a raw organopolysiloxane rubber including a molecular chain which is represented by a specific empirical formula and in which each of both terminals has been blocked with a trialkenylsiloxy group and a raw organopolysiloxane rubber including a molecular chain which is represented by a specific empirical formula and in which each of both terminals has been blocked with a monoalkenyldialkylsiloxy group; (B) an organohydrogenpolysiloxane having at least two silicon-atom-bonded hydrogen atoms in the molecule; (C) carbon black having an average primary-particle diameter of 100-350 nm; (D) reinforcing fumed silica having a specific surface area, as determined by the BET adsorption method, of 50 m2/g or greater; and (E) a platinum-group metal catalyst. This millable silicone rubber composition has an excellent electric-field relaxation ability, a high elongation at break, a reduced tension set, and high dielectric or insulating properties.

Inventors:
OISHI Kazuhiro (Shin-Etsu Chemical Co. Ltd., 1-10, Hitomi, Matsuida-machi, Annaka-sh, Gunma 24, 〒3790224, JP)
Application Number:
JP2018/025226
Publication Date:
April 25, 2019
Filing Date:
July 03, 2018
Export Citation:
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Assignee:
SHIN-ETSU CHEMICAL CO., LTD. (6-1 Ohtemachi 2-chome, Chiyoda-ku Tokyo, 04, 〒1000004, JP)
International Classes:
C08L83/07; C08K3/04; C08K3/36; C08L83/05; H01B3/28; H01B3/46; H02G15/064; H02G15/103; H02G15/184
Foreign References:
JP2017057307A2017-03-23
JPH11140797A1999-05-25
JPS6328983A1988-02-06
JPH0841348A1996-02-13
JPS63356A1988-01-05
Attorney, Agent or Firm:
PATENT PROFESSIONAL CORPORATION EI-MEI PATENT OFFICE (GINZA OHTSUKA Bldg. 2F, 16-12 Ginza 2-chome, Chuo-k, Tokyo 61, 〒1040061, JP)
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