WO 2019/141377 A1

Alkyl silicone resin as additive for hydrophobising fibre cement

(22) 19.01.2018

(43) 25.07.2019

(57) The invention relates to an alkyl silicone resin (A) containing at least 80 % by weight units of general formula I R1aR2O)bR3cSiO(4-a-b-c)/2 (I), wherein R1, R2 and R3 stand for the alkyl groups defined in claim 1, a is 0, 1, 2 or 3, b is 0, 1, 2 or 3, and c is 0, 1 or 2, with the provision that the sum of a+b+c is less than or equal to 3 and in at least 50 % of the units of formula (I) the sum of a+b is equal to 0 or 1 and in at least 20 % of the units of general formula (I) c is equal to 1, wherein the content of alkoxy groups R2O is 5-20 % by weight. The invention also relates to a continuous method for producing alkyl silicone resin (A) from chlorosilane, alcohol and water in a reaction column, and to a continuous method for mass hydrophobising fibre cement, in which a mixture containing water, fibres, cement and alkyl silicone resin (A) is produced, and to the use of alkyl silicone resin (A) for mass hydrophobising fibre cement.

(71) Wacker Chemie AG, Hanns-Seidel-Platz 4, 81737 München (DE)

(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, FI, 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)

Related articles:

Issue 2018-12 WO 2018/178830 A1

Hydraulic cement formulation

(22) 23.03.2018 (43) 04.10.2018 (57) The invention relates to a hydraulic cement formulation that allows the content of clinker to be substantially reduced, the hydraulic cement formula comprising...

Issue 2019-4 SG10201810950T (A)

Cement compound and a method for the production thereof

(22) 05.06.2015 (43) 30.01.2019 (57) The present invention relates to a cement compound. The invention also relates to a method for producing such a cement compound. More in particular, the present...

Issue 2019-1-2 HRP20181382 (T1)

Ultra-fast setting cement based on amorphous calcium aluminate

(22) 28.08.2018 (43) 19.10.2018 (57) Summary of the corresponding patent WO2015173525 (A1): The invention relates to an ultra-fast setting cement composition comprising at least amorphous calcium...

Issue 2017-12 UA115381 (C2)

Calcium sulfoaluminate composite binders

(22) 02.09.2014 (43) 25.10.2017 (57) The present invention relates to composite binders containing calcium sulfoaluminate cement and supplementary cementitious material, wherein a weight ratio of...

Issue 2018-1-2 WO 2017/182678 A1

Cements and cement mixtures having high mechanical properties at young ages

(22) 19.04.2016 (43) 26.10.2017 (57) The invention relates to Portland cements of the type and category CEM I 52,5 R according to the Spanish Standard UNE-EN 197-1 and which also have a grain-size...