SETTING RETARDER FOR HYDRATE-FORMING BINDERS

• Main Authors: HAMPEL CHRISTINA, ZIMMERMANN JOERG
• Format: Patent
• Language: English
• Published: 18.12.2014
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

A setting retarder for hydrate-forming binders is produced by reacting a first reactant A, including an amino acid and/or an amino acid derivative, with a second reactant C, including an amine-free carboxylic acid and/or an amine-free carboxylic acid derivative, in a reaction mixture to form a reaction product, the reaction mixture further containing at least one base, and alternatingly adding partial quantities of the at least one base and partial quantities of the second reactant C to the reaction mixture so that the reaction is carried out at a pH value in a range of from 7.5-11.5, wherein the setting retarder is in liquid or solid form.