Patent Number: 6,251,990

Title: Silicone rubber compositions having high-voltage electrical insulation, sealing and repairing compounds for polymeric insulators

Abstract: A thixotropic silicone rubber composition comprising (A) an organopolysiloxane having on the average at least two alkenyl groups in a molecule and a degree of polymerization of up to 1,200, (B) a liquid organohydrogenpolysiloxane having at least two hydrogen atoms each attached to a silicon atom, (C) aluminum hydroxide, (D) an addition reaction catalyst, (E) a thixotropic agent, and optionally (F) a tackifier cures at room temperature or elevated temperature into a silicone rubber having high strength and electrical insulating properties sufficient to serve as a high-voltage electrical insulator. The composition is so thixotropic that it may be used in repairing chipped portions of insulators.

Inventors: Meguriya; Noriyuki (Gunma-ken, JP), Azechi; Syuuichi (Gunma-ken, JP), Sekiguchi; Susumu (Gunma-ken, JP)

Assignee: Shin-Etsu Chemical Co., Ltd.

International Classification: C08L 83/00 (20060101); C08L 83/04 (20060101); C08L 083/04 (); C08K 003/10 (); C08K 003/36 ()

Expiration Date: 06/26/2018