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US 5,626,668 AGranted
Process for the water-repellent impregnation of plaster
AssigneeWacker Chemie AG
InventorsDieter Gerhardinger, Richard Weidner, Hans Mayer
Life of this patent
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Abstract
Water-repellent plaster compositions comprising the constituents (A) 100 parts by weight of gypsum plaster, (B) from 0.05 to 50 parts by weight of oxide or hydroxide of alkali or alkaline earth metals or a mixture thereof, and (C) from 0.05 to 20 parts by weight of an organopolysiloxane which has hydroxyl and/or alkoxy groups bonded to silicon atoms.
Claims7
Water-repellent plaster compositions comprising
- (A) 100 parts by weight of gypsum plaster,
- (B) from 0.05 to 50 parts by weight of an oxide or hydroxide of alkali or alkaline earth metals or mixtures thereof, and
- (C) from 0.05 to 20 parts by weight of an organopolysiloxane which has hydroxyl and/or alkoxy groups bonded to silicon atoms.
Process for the water-repellent treatment of plaster, wherein
- (A) 100 parts by weight of gypsum plaster are admixed with
- (B) from 0.05 to 50 parts by weight of an oxide or hydroxide of alkali or alkaline earth metals or a mixture thereof, and
- (C) from 0.05 to 20 parts by weight of organopolysiloxane which has hydroxyl and/or alkoxy groups bonded to silicon atoms.
Dependencies are inferred from the claim text.