(57) The present invention describes the use of a polycarboxylate ether as an air-entraining agent in a composition comprising a hydraulic binder, wherein the polycarboxylate ether is a copolymer comprising monomer units A of acrylic acid or a salt thereof and monomer units B of polyethylene glycol isoprenyl ether and/or polyethylene glycol methallyl ether. The air-entraining agent is particularly suitable for mortar cements, in particular for mortar cements comprising fly ash.
(71) Sika Technology AG, 6340 Baar (CH)
(84) European (AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR). Designated Extension States: BA ME