High dielectric insulating silicone rubber composition and electric field relaxation layer

    公开(公告)号:US11434345B2

    公开(公告)日:2022-09-06

    申请号:US16604345

    申请日:2018-02-20

    发明人: Kazuhiro Oishi

    摘要: 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), R1nSiO(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.

    Activation of protected cross-linking catalysts during formation of dielectric materials

    公开(公告)号:US11406972B2

    公开(公告)日:2022-08-09

    申请号:US15772839

    申请日:2015-12-04

    申请人: Intel Corporation

    摘要: Catalysts for facilitating cross-linking of liquid precursors into solid dielectric materials are disclosed. Initially, catalysts are protected, either by coordination with other compounds or by conversion to an ionic salt. Protection prevents catalysts from facilitating cross-linking unless activated. A catalyst is activated upon receiving an excitation, e.g. thermal excitation by heating. Upon receiving an excitation, protection of a catalyst dissociates, decomposes, becomes neutralized, or is otherwise transformed to allow the catalyst to facilitate cross-linking of the precursors into solid dielectric materials. Methods for fabricating dielectric materials using such protected catalysts as well as devices comprising the resulting materials are also described. Dielectric materials comprising cross-linked cyclic carbosilane units having a ring structure including C and Si may be formed in this manner. Protected catalysts disclosed herein allow careful control of precursor cross-linking, resulting in higher quality dielectric materials that may be formed by coating techniques.

    Composite stretchable film and method for forming same

    公开(公告)号:US11377529B2

    公开(公告)日:2022-07-05

    申请号:US16672915

    申请日:2019-11-04

    摘要: The present invention is a composite stretchable film including: a surface film which is a cured product of a polyurethane 1 containing a copolymer of one or more of units “a1” to “a4” and silicone-pendant type urethane units “b1” and/or “b2” represented by the following general formula (1); and an inner film which is a cured product of a polyurethane 2 containing a unit “c” having polyether and urethane bonds represented by the following general formula (2), on which the surface film is laminated. The present invention provides a stretchable film that has excellent stretchability and strength, with the film surface having excellent water repellency, and a method for forming the same.

    CABLE AND MEDICAL HOLLOW TUBE
    10.
    发明申请

    公开(公告)号:US20210079258A1

    公开(公告)日:2021-03-18

    申请号:US16903637

    申请日:2020-06-17

    摘要: A cable includes a sheath, and a coating film covering a circumference of the sheath, the coating film adhering to the sheath. The coating film is formed from a rubber composition including a rubber component and fine particles. A static friction coefficient on a surface of the coating film is 0.5 or less. When the coating film is subjected to a testing such that a long fiber non-woven fabric including cotton linters including an alcohol for disinfection with a length of 50 mm along a wiping direction is brought contiguous to the surface of the coating film at a shearing stress of 2×10−3 MPa to 4×10−3 MPa, followed by wiping off the surface of the coating film at a speed of 80 times/min to 120 times/min and 20,000 repetitions thereof for a wiping direction length of 150 mm, a difference (an absolute value of a difference) between the static friction coefficients of the coating film before and after the testing is not greater than 0.1.