| 摘要 |
Aqueous dispersions comprising a polyurethane synthesized from a) diisocyanates, b) diols of which b<SUB>1</SUB>) from 10 to 100 mol %, based on the total amount of diols (b), have a molecular weight of from 500 to 5 000, and b<SUB>2</SUB>) from 0 to 90 mol %, based on the total amount of diols (b), have a molecular weight of from 60 to 500 g/mol, c) monomers other than the monomers (a) and (b), containing at least one isocyanate group or at least one isocyanate-reactive group and further carrying at least one hydrophilic group or potentially hydrophilic group by means of which the polyurethane is made dispersible in water, d) if appropriate, further, polyfunctional compounds other than the monomers (a) to (c), containing reactive groups which are alcoholic hydroxyl groups, primary or secondary amino groups or isocyanate groups, and e) if appropriate, monofunctional compounds other than the monomers (a) to (d), containing a reactive group which is an alcoholic hydroxyl group, a primary or secondary amino group or an isocyanate group, wherein the diols b<SUB>1 </SUB>comprise less than 0.5 part by weight of cyclic compounds per 100 parts by weight of diols b1.
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