Process for the body-hydrophobization of building materials comprising solid organosilicon compounds
AssigneeWacker Chemie AG
InventorsMichael Stepp, Herbert Koller, Daniel Schildbach
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Abstract
Body-hydrophobing of mineral building compositions prepared from water curable mineral materials such as cement and plaster are obtained by admixing into the curable composition an organosilicon compound prepared by reacting a hydrocarbylhalosilane or hydrocarbylhydrocarbyloxysilane with a gylcol or polyglycol in a mol ratio of halo or hydrocarbyloxy radicals to hydroxyl radicals of 0.3 to 1.3. The organosilicon compounds are solid at 20° C.
Claims20
-12. (canceled)
A process for the body-hydrophobization of substrates with organosilicon compounds O which are solid at 20° C. and prepared by a process comprising reacting a molar equivalent of at least one silane S which is a hydrocarbyltrihalosilane, hydrocarbyltrihydrocarbyloxysilane, mixture thereof, or partial hydrolysate thereof, with at least one polyhydroxy compound P, in a molar ratio such that per mol equivalent of halo or hydrocarbyloxy radicals there are 0.3 to 1.3 mol equivalents of hydroxyl radicals.
A process for preparing organosilicon compounds O which are solid at 20° C., comprising reacting a molar equivalent of at least one silane S which is a hydrocarbyltrihalosilane, hydrocarbyltrihydrocarbyloxysilane, mixture thereof, or partial hydrolysate thereof, with at least one polyhydroxy compound P, in a molar ratio such that per mol equivalent of halo or hydrocarbyloxy radicals there are 0.3 to 1.3 mol equivalents of hydroxyl radicals,
- there being present at the same time a water fraction which is at least sufficient to hydrolyze halo or hydrocarbyloxy radicals still remaining on quantitative conversion of the polyhydroxy compound P, but not exceeding 2 mol equivalents per mol equivalent of halo or hydrocarbyloxy radical.
Dependencies are inferred from the claim text.