Patent ID: 11908595
Assignee: MOMENTIVE PERFORMANCE MATERIALS INC.
Field: Measurement (Instruments)
Classification: CPC H  C  G | IPC C  G  H

Claim 0:
1. A method for the manufacture of a cable joint or a cable termination comprising the steps of:
(i) providing a silicone composition, obtained by curing a composition comprising:
a) 100 pt·wt. of at least one polyorganopolysiloxane having alkenyl groups,
b) 0-100 ptwt. of a crosslinker component comprising at least one polyorganohydrogensiloxane,
c) 0-100 pt·wt. of a filler component comprising one or more reinforcing silicas,
d) >0.1-2 pt·wt. of at least one dielectric active compound selected from the group consisting of oxides, carbides, ferrites or spinels of any of Ti, Al, Zn, Fe, Mn, Mo, Ag, Bi, Zr, Ta, B, Sr, Ba, Ca, Mg, Na, K, and Si,
e) a curing catalyst selected from the group consisting of 0-1000 ppm of a compound enabling hydrosilylation and 0.1 to 2 wt.-% of an organic peroxide each related to the sum of the amounts of the components a) to d), and
f) 0-50 pt·wt. of one or more auxiliary additives,
said silicone composition having a temperature dependency of the volume resistivity in the range of 25 to 90° C. at an electric field of 10 kV/mm to 30 kV/mm, such that the ratio of the maximum volume resistivity and the minimum volume resistivity is <10, and the volume resistivity in the range of 25 to 90° C. at an electric field of 10 kV/mm to 30 kV/mm is between 1*1014 and 1*1016 Ohm*cm,

(ii) providing a conductive shaped optionally cured silicone composition which differs from the silicone composition of (i), and
(iii) encapsulating at least a part of the surface of the composition of (ii) with a composition according to (i) in a mold to form and cure a cable joint or cable termination.