| 摘要 |
The present invention relates to an additive for hydraulically binding systems for reduction of blooms in hydraulically bound systems, which is preferably present as a powder redispersible in water and is suitable in particular as additive for addition in dry mortars. The powder redispersible in water consists of at least one organic component and at least one water-soluble organic polymeric protective colloid and also if appropriate further additives, with the organic component containing at least one compound having a cyclic group which is completely or partially saturated and having a melting point of about -20 to 250° C. and also a molecular weight of about 100 to 10 000, and forming a stable dispersion in water with the water-soluble organic polymeric protective colloid, with the weight ratio of the organic component to the water-soluble organic polymeric protective colloid being about 95:5 to 5:95. The invention also relates to a process in which the drying step is omitted. The additive of the invention can be used in hydraulically binding masses, in particular in concrete, gypsum and/or lime and/or cement plasters, repair mortars and/or full heat protection mortars, jointing adhesives and/or tile adhesives, levelling compounds and/or fillers, non-shrink grouting and/or as additive for concrete coatings and for adhesives.
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