Self-foaming gypsum compositions

(22) 05.08.2022

(43) 16.02.2023

(57) A dry gypsum composition, in particular for preparing foamed gypsum compositions, comprises: a) 10 - 50 wt.% of a gypsum based binder; b) 30 - 60 wt.% of aggregates, optionally comprising lightweight aggregates; c) 1 - 15 wt.%, especially 2 -9 wt.%, of a foaming agent capable of producing carbon dioxide; d) 0.5 - 10 wt.%, especially 1 - 6 wt.%, of all acidic agent, capable of reacting with the foaming agent under aqueous conditions for generation of carbon dioxide; whereby the proportions are given with respect to the total weight of the dry gypsum composition.

(71) Sika Technology AG, Zugerstrasse 50, 6340 Baar (CH)

(84) ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FL FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)