Title:
HIGH DIELECTRIC INSULATING SILICONE RUBBER COMPOSITION AND ELECTRIC FIELD RELAXATION LAYER
Document Type and Number:
WIPO Patent Application WO/2018/193705
Kind Code:
A1
Abstract:
Provided are a high dielectric insulating silicone rubber composition and an electric field relaxation layer. This high dielectric and insulating silicone rubber comprises: (A) 100 parts by mass of an organopolysiloxane represented by formula (1),
R1
nSiO(4-n)/2 (1),
(in the formula, R1 represents the same or different, substituted or unsubstituted monovalent hydrocarbon groups, and n is a positive number of 1.95 to 2.04);
(B) 60 to 150 parts by mass of thermal black having an average primary particle size of 150 to 500 nm;
(C) 5 to 100 parts by mass of reinforcing fumed silica having a specific surface area measured by a BET adsorption method of 50 m2/g or more; and
(D) 0.1 to 10 parts by mass of a curing agent.
The composition is characterized in that a cured product thereof satisfies a dielectric constant of 10 or more, a volume resistivity of 1.0×1013 to 1.0×1017 Ω∙cm, a loss tangent of 0.1 or less, and a dielectric breakdown strength (BDV) of 7 kV/mm or more.
Inventors:
OISHI KAZUHIRO (JP)
Application Number:
PCT/JP2018/005950
Publication Date:
October 25, 2018
Filing Date:
February 20, 2018
Export Citation:
Assignee:
SHINETSU CHEMICAL CO (JP)
International Classes:
C08L83/04; C08K3/04; C08K3/36; C08K5/14; C08L83/05; H01B3/28; H01B3/46; H02G15/064; H02G15/103; H02G15/184
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Other References:
See also references of EP 3613808A4
Attorney, Agent or Firm:
PATENT PROFESSIONAL CORPORATION EI-MEI PATENT OFFICE (JP)
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