Additive for inorganic binders
AssigneeChemie Linz Aktiengesellschaft
InventorsStefan Pieh, Hubert Czepel
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Abstract
Additive for inorganic binders, such as cements, calcium sulfate, magnesia cement and the like, which comprises, as the active ingredient, a water-soluble salt of a mixed resin consisting of an aromatic aminosulfonic acid, urea, melamine and formaldehyde, the molar ratio, in the resin, of aromatic aminosulfonic acid to the total amount of melamine and urea being (0.2 to 1.0):1.0 and the molar ratio of melamine to urea being from 0.75:0.25 to 0.30:0.70, and also building materials, having increased flowability and early strength, in which this additive is present.
Claims5
A mixture containing an inorganic binder from the group consisting of cement, magnesia cement and calcium sulfate, and having improved flowability and increased early strength, which comprises water, the inorganic binder and 0.01 to 20%, relative to the inorganic binder, of a water-soluble salt of a mixed condensate of urea, melamine, an aromatic aminosulfonic acid and formaldehyde, in which the molar ratio of the aromatic aminosulfonic acid to the total amount of urea and melamine is from 0.2 to 1.0:1 and the molar ratio of melamine to urea is from 0.75:0.25 to 0.30:0.70.
Dependencies are inferred from the claim text.