METHOD OF PRODUCING MINERAL WOOL Russian patent published in 2021 - IPC C03C25/32 

FIELD: manufacturing technology.

SUBSTANCE: present invention relates to a method of making insulating materials based on mineral wool. Method comprises applying on mineral wool fibers a binder composition containing (a) at least one carbohydrate selected from reducing sugars, non-reducing sugars, hydrogenated sugars and mixture thereof, (b) at least one cross-linking agent for crosslinking carbohydrate(s). Evaporation of binder solvent phase and thermal curing of non-volatile fraction of composition is carried out. Preferably immediately before application of binder composition on mineral wool fibers there is added an oil-in-water emulsion, containing water, mineral oil, at least one nonionic surfactant in amount of 0.5 to 5.0 weight part per 100 weight parts of mineral oil and a water-soluble polysaccharide in amount of 0.1 to 2.0 parts by weight per 100 parts by weight of mineral oil. Average diameter of the oil drops in the oil-in-water emulsion, determined by particle size analysis using laser diffraction, is between 5.1 mcm and 150 mcm, and amount of mineral oil applied on fibers of mineral wool is between 0.1 % and 2.0 % relative to weight of mineral fibers.

EFFECT: technical result is higher efficiency of dust-forming counteraction.

15 cl, 2 tbl