FIELD: chemistry.
SUBSTANCE: invention relates to a powdered dispersant which contains, as a dispersant component, a combination of (a) at least one polycarboxylic acid ether with weight content of 0.1-20%, (b) at least one polycarboxylic acid ester with weight content of 0-20%, and (c) at least one neutral copolymer with weight content of 0.1-20%, which is obtained via combined spray drying of separate components and which is suitable for controlling fluidity of aqueous chemical construction suspensions. The invention also relates to use of said dispersant. The invention is developed in subclaims. With the dispersants disclosed herein, subsequent dispersant dosing can be achieved without an additional step of the method.
EFFECT: through subsequent dosing with a fluidity enhancing agent, high polymer dosing efficiency can be achieved, the degree of dispersion can be controlled in multiple steps and the duration of the treatment capacity of fresh mortar can be particularly extended at high temperatures by increased saponification.
50 cl, 2 tbl
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