METHOD OF OBTAINING MOISTURE-CURING POLYURETHANE BINDING AGENT WITH TERMINAL ALKOXYSILANE GROUPS Russian patent published in 2015 - IPC C08G18/77 C08G65/336 C08G77/26 

FIELD: chemistry.

SUBSTANCE: method includes reaction of bifunctional polymer of formula (I) X-R-X, where R stands for ether chain residue, X stands for hydroxygroup, with respective diisocyanate of formula (II) X-R⁶-X, where X stands for isocyanate group, R6 stands for hydrocarbon group, which contains to 16 carbon atoms, and organoalkoxysilane of formula (III) Y-R¹-Si(R²)_m(OR³)_3-m, where Y stands for primary or secondary aminogroup, in presence of vinylalkoxysilane of formula (IV) CH₂=CH-Si(R⁴)_n(OR⁵)_3-n, and in compounds (III) and (IV) each of R¹, R², R³, R⁴, R⁵ has the same or different values and stands for hydrocarbon group, which contains 1-12 carbon atoms, m, n=0, 1 or 2.

EFFECT: method makes it possible to obtain polymer with low viscosity, stable in storing and processing, without requiring additional internal cross-linking, duration of synthesis is reduced from 12 hours to 5-6 hours, reproducibility is improved and stability of synthesis process results is ensured of synthesis process results, cost of obtained product is reduced due to reduction of synthesis time and reduction of its staging.

17 cl, 1 dwg, 3 tbl, 18 ex