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 (JP)
Application Number:
PCT/JP2018/025226
Publication Date:
April 25, 2019
Filing Date:
July 03, 2018
Export Citation:
Assignee:
SHINETSU CHEMICAL CO (JP)
International Classes:
C08L83/07; C08K3/04; C08K3/36; C08L83/05; H01B3/28; H01B3/46; H02G15/064; H02G15/103; H02G15/184
Foreign References:
| JP2017057307A | 2017-03-23 | |||
| JPH11140797A | 1999-05-25 | |||
| JPS6328983A | 1988-02-06 | |||
| JPH0841348A | 1996-02-13 | |||
| JPS63356A | 1988-01-05 | |||
| JP2015153514A | 2015-08-24 | |||
| JP2017002218A | 2017-01-05 | |||
| JP2013177558A | 2013-09-09 | |||
| JP2015076168A | 2015-04-20 | |||
| JPH0822716A | 1996-01-23 | |||
| JP2011116955A | 2011-06-16 | |||
| JP2015057763A | 2015-03-26 | |||
| JP2017002218A | 2017-01-05 |
Other References:
See also references of EP 3699238A4
Attorney, Agent or Firm:
PATENT PROFESSIONAL CORPORATION EI-MEI PATENT OFFICE (JP)
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