FIELD: chemistry.
SUBSTANCE: invention relates to an aqueous heat-cured binder based on water-soluble oligomeric composite esters obtained by interaction between glucide and polycarboxylic acid. A composition of a heat-cured binder for organic or mineral fibers contains water and water-soluble oligomeric composite ester of glucide selected from reducing sugars, non-reducing sugars, and hydrogenated sugars, wherein hydrogenated sugars are selected from a group consisting of erythritol, arabitol, xylitol, sorbitol, mannitol, iditol, maltitol, isomaltitol, lactitol, cellobitol, palatinite, maltotriitol, and hydrogenation products of starch hydrolysates or lignocellulose substances and polycarboxylic acid. The binder composition contains solids in amount from 40 to 80 wt.%, water-soluble oligomeric composite ester is at least 90 wt.% of solids of the composition of the heat-cured binder, and the composition of the heat-cured binder contains free sorbitol in amount less than 5 wt.% per the total content of solids in it. In this case, the binder composition has a pH value in the range from 1 to 7. A method for the production of a product based on mineral or organic fibers is described, including stages of obtainment of a gluing composition by dilution of the composition of the heat-cured binder with water to a solid content in the range from 2 to 10 wt.%, application of the gluing composition to mineral or organic fibers, formation of a set of glued mineral or organic fibers, and heating of the set of glued mineral or organic fibers to curing of the gluing composition.
EFFECT: provision of a composition of a heat-cured binder acceptable for pumping and infinite dilution and having, at concentrations usually used in case of gluing compositions (2-6 wt.%), viscosity fully compatible with a conventional gluing system by spraying through nozzles (spraying crown) and characterized by largely limited release of acidic volatile components at a level of an exhaust duct of a glass wool calcination chamber.
13 cl, 3 dwg, 1 tbl
