METHOD OF OBTAINING SILICON DIOXIDE-CONTAINING POLYOL DISPERSIONS AND THEIR APPLICATION FOR OBTAINING POLYURETHANE MATERIALS Russian patent published in 2014 - IPC C01B33/145 C01B33/146 C09C1/30 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of obtaining silicon-dioxide-containing polyol dispersions, used to obtain polyurethane materials. Claimed is the method of obtaining silicate-containing polyols, which includes stages: (i) mixing water silica sol (K) with the average diameter of particles from 1 to 150 nm, content of silicic acid, calculated as SiO₂, from 1 to 60 wt % and pH value from 1 to 6 depending on the used content of SiO₂ and from 0.1 to 20-fold amount calculated per water of, at least, one organic solvent (L); (ii) mixing the obtained mixture with polyol; (iii) at least, partial distillation of an organic solvent (L) and water; (iv) mixing, at least, with one compound (S), which contains, at least, one at least once alkoxilated silyl group and, at least, one alkyl, cycloalkyl or aryl substituent, which can contain heteroatoms, and the said substituent contains, if necessary, a group, reactionable with respect to alcohol, amine or isocyanate, in an amount from 0.1 to 30 mol % calculated per SiO₂ content; (v) if necessary, bringing pH value of silicate-containing polyol to a value of 7 to 12 by addition of a strongly basic compound, and the stage (v) can be realised between stages (iii) and (iv).

EFFECT: claimed method makes it possible to obtain low-viscous dispersions of silicon dioxide particles from commercially available water sols of silicon dioxide.

16 cl, 3 tbl