Process for drying concrete dispersants
AssigneeSika Technology AG
InventorsPedro Gallegos, Lili Arancibia, Hugo Olivares, Ernesto Croquevielle, Thomas Haack
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Abstract
A process for the production of a solid dispersant for a hydraulically binding composition includes the steps of: providing at least one first polymer, which is a comb polymer having a polymer backbone comprising carboxyl groups; providing at least one second polymer, which is a condensate of, at least, an aromatic compound and formaldehyde; or a lignosulfonate; preparing an aqueous solution comprising the first and the second polymer; and spray-drying the aqueous solution to obtain the solid dispersant.
Claims21
A process for the production of a solid dispersant for a hydraulically binding composition, comprising the steps of
- a) providing at least one first polymer, which is a comb polymer having a polymer backbone comprising carboxyl groups,
- b) providing at least one second polymer, which is a condensate of, at least, an aromatic compound and formaldehyde;
- or a lignosulfonate,
- c) preparing an aqueous solution comprising the first and the second polymer, and
- d) spray-drying the aqueous solution to obtain the solid dispersant,
- wherein the particle size of the spray-dried solid dispersant is below 700 μm and the average particle size (d50%) is between 40 μm and 100 μm.
Dependencies are inferred from the claim text.