| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to solution of polyurethane-ureas for application of coating on substrates. Claimed solution can be obtained as a result of interaction of (a) mixture of two bifunctional polyetherdioles, each of which has molecular weight between 500 and 5000, with molar ratio of both components in the mixture being chosen between 10:90 and 90:10, (b) 0.7-1.5 mol of mixture of two lowmolecular bifunctional alcohols with molecular weight from 32 to 500 per a mole of polyetherdiol, as co-called chain-elongating agents, with molar ratio of both components in the mixture being chosen between 10:90 and 90:10, (c) 0.08-0.33 mol of aliphatic or cycloaliphatic bifunctional amine with molecular weight from 28 to 500 per a mole of polyetherdiol, as so-called chain-elongating element, (d) 1.8-2.9 mol of aromatic diisocyanate per a mole of polyetherdiol, and dissolution of obtained polyurethane-ureas or obtaining them in (e) 40-85 wt % of solvent or mixture of solvents calculated per the total mixture from (a)-(e), consisting of linear or cyclic esters and ketones, with residual NCO-groups being, possible interacted with monofunctional chain terminator. Also described is application of thereof for application on substrates, in particular textile products.EFFECT: manufacturing stable covering solutions of polyurethane-ureas in toxicologically safe organic solvents, which have good elasticity, high strength and relatively high point of softening.7 cl, 1 tbl, 11 ex |
