| 摘要 |
<p>Solution of polyurethane urea obtained by reacting difunctional polyether diol or mixtures of macrodiols; 0.6-1.6 mole of a difunctional alcohol for per mole of polyether diol or their mixtures, or mixtures of the difunctional alcohol; 0.05-0.35 mole of aliphatic or cycloaliphatic difunctional amine for per mole of polyetherdiol or their mixtures, or mixtures of the difunctional amine; 1.7-3 mole of aromatic diisocyanate for per mole of polyether diol or their mixture; and dissolving the obtained polyurethane urea in 40-85 wt.% of solvent or its mixture containing e.g. alcohol or ketone. Solution of polyurethane urea obtained by reacting difunctional polyether diol with a molecular weight of 500-16000 or mixtures of macrodiols; 0.6-1.6 mole of a difunctional alcohol for per mole of polyether diol or their mixture, where the alcohol has a molecular weight of 32-500, or mixtures of the difunctional alcohol; 0.05-0.35 mole of aliphatic or cycloaliphatic difunctional amine for per mole of polyetherdiol or their mixture, where the aliphatic or cycloaliphatic difunctional amine has a molecular weight of 28-500, or mixtures of the difunctional amine; 1.7-3 mole of aromatic diisocyanate for per mole of polyether diol or their mixture, where the total functionality of the diols is 1.95-2.05; and dissolving the obtained polyurethane urea in 40-85 wt.% of solvent or its mixture containing linear or cyclic ester, ether, alcohol or ketone. An independent claim is included for use of solution for coating substrates.</p> |
