Patent ID: 6063487
Filing Date: 2000-05-16
Classification: C08G,C08K,C08L,H01B,Y10T

Abstract:
A silicone rubber composition for use as a high-voltage electrical insulator comprising(A) 100 parts by weight of an organopolysiloxane composition, wherein said organopolysiloxane composition is curable by an organic peroxide curing catalyst or an addition reaction curing catalyst,(B) about 1 to about 100 parts by weight of filler selected from finely divided silica having a surface area of 50-400 m.sup.2 /g, ground quartz having a mean particle size of less than 50 .mu.m, diatomaceous earth having a mean particle size of less than 50 .mu.m or mixtures thereof, and(C) about 30 to about 500 parts by weight of aluminum hydroxide having a water-soluble sodium ion content of up to 0.01% by weight and exhibiting a pH value of 6.5 to 8.0 and an electrical conductivity of up to 50 .mu.s/cm when measured as a 30% by weight water slurry.