Water-soluble formaldehyde-free polycondensation products based on amino-s-triazines
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United States of America Patent
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Apr 6, 1999
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N/A
app pub date -
Jul 9, 1997
filing date -
Jul 9, 1996
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Abstract
Water-soluble formaldehyde-free polycondensation products based on amino-s-triazines with at least two amino groups and glyoxylic acid, which contain as further component at least one amino compound and where the molar ratio of amino-s-triazine to glyoxylic acid to amino compound is 1:0.5 to 6.0:0.1 to 2.0. These polycondensation products are excellently suited as additives for aqueous suspensions of inorganic binders, especially cement, lime and gypsum. Building material mixtures which contain these polycondensation products remain workable for a considerably longer time and, in spite of this, also set more quickly.
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