A novel chromium reducing agent used in a cement
(22) 17.08.2023
(43) 14.03.2024
(57) The present invention relates to a novel chromium reducing agent used in a cement. In particular, present invention provides a chromium reducing agent composition, a method for reducing the water-soluble hexavalent clu-omium in a cement with the chromium reducing agent composition and a cementitious composition comprising the chromium reducing agent composition. The chromium reducing agent composition comprises: a chelating agent, preferably in an amount of 30-60 wt%, preferably 35-55 wt%, preferably 40-50 wt%, based on the total weight of the chromium reducing agent composition; and optionally a stabilizer, preferably in an amount of 0.1-1 wt%, preferably 0.3-0,7 wt%, preferably 0.4-0.6 wt%, based on the total weight of the chromium reducing agent composition. The chromium reducing agent composition has a remarkable chromium reduction effect, excellent high-temperature resistance, durability and storage stability, and is low in price.
(71) SIKA Technology AG (CH), 6340 Baar (CH)
(84) ARIPO (BW, CV, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SC, 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, FI, FR, GB, GR, HR, HU, 1E, IS, IT, LT, LU, LV, MC, ME, 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)
