FIELD: chemistry.
SUBSTANCE: invention refers to the composition of water binding medium for products made of mineral fiber with increased aging resistance. Composition contains water-soluble component produced by interaction of at least one alkanolamyn with at least one carbonic acid anhydride and urea in amount 1-25% w/w calculated as hard components of composition. The ratio of components is such that the ratio of equivalents of aminogroups plus hydroxyl-groups (NH+OH) excluding urea to equivalents of carboxyl groups (COOH) in the component is in the range of about 0.6-1.5. Ratio of total amount of equivalents of aminogroups plus hydroxyl-groups (NH+OH) including urea to the equivalents of carboxyl groups (COOH) in the binding medium is between the limits x(min) and y(max) represented as 
The ready water-soluble component is not mandatory treated with the alkali. The composition is used for production of glued item by bringing mineral fibers or product of mineral fibers in contact with composition of water binding medium and its subsequent hardening at temperature 225-300°C.
EFFECT: production of compositions for binding of mineral fibers with excellent hardening and durability characteristics, good water solubility and dilution resistance.
13 cl, 3 tbl, 1 dwg, 6 ex
