PROCESS FOR HYDROPHOBIZING SHAPED INSULATION-MATERIAL BODIES BASED ON SILICA AT AMBIENT PRESSURE

摘要

The present invention relates to a process for producing a hydrophobized shaped thermal- insulation body, comprising pressing or compacting a thermal-insulation mixture containing a silica, an IR opacifier, an organosilicon compound A and an organosilicon compound B, wherein organosilicon compound A is hexamethyldisilazane (HMDS) and organosilicon compound B corresponds to a substance of the formula RnSiX4-n, where R = hydrocarbyl radical having 1 to 18 carbon atoms, n = 0, 1 or 2, X = Cl, Br or alkoxy group –OR1 where R1 = hydrocarbyl radical having 1 to 8 carbon atoms, or organosilicon compound B corresponds to a silanol of the formula HO[-Si(CH3)2O-]mH, where m = 2-100.