It is prepared by burning a vaporizable silicon compound, such as silicon tetrachloride, for example, in a mixture with hydrogen and oxygen. The invention relates to fumed silica, to a process for preparing it and to its use.ДЇumed silica (pyrogenically prepared silicon dioxide) is known from Ullmanns EnzyklopГ¤die der technischen Chemie, Volume 21, page 464 (1982). The hydrophilic milled fumed silica according to claim 1 which has no particles in the range greater than 40 Ојm. An article of manufacture made from the vulcanize silicone rubber composition of claim 4.Д¦. The silicone rubber composition according to claim 3 which is vulcanized.ДҐ.

Silicone rubber composition comprising 0.5% to 60% by weight of the hydrophilic milled fumed silica according to claim 1.Д¤. A composition comprising silicone rubber and the hydrophilic milled fumed silica according to claim 1.ДЈ. Hydrophilic milled fumed silica prepared by a process having no propensity to reagglomerate, comprising grinding fumed silica having a BET surface area of 200в’5 m 2/g and recovering a hydrophilic milled fumed silica that exhibits lower grindometer values and smaller median values than the starting fumed silica, wherein the hydrophilic milled fumed silica contains no hydrophobic fractions and has the following physicochemical data:Дў.

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