Silicone rubber with ATH filler

摘要

The present invention relates to a filled silicone rubber (SiR) material (2) comprising at least 20 wt% of alumina trihydrate (ATH) as filler (4) dispersed below the filtration limit in SiR (5). ATH is a mixture of the first ATH powder and the second ATH powder. In the particle size distribution of the first ATH powder and the second ATH powder, the d ₉₀ value of the second ATH powder is smaller than the d ₁₀ value of the first ATH powder. The invention also relates to the insulator 1 made of filled SiR material 2 and the use of the insulator in high voltage direct current (HVDC) applications.