Patent ID: 6395824
Filing Date: 2002-05-28
Classification: C08G,C08L,C09D,C09J,C14C,D06M,D06N,E04D,Y10T

Abstract:
An aqueous dispersion comprising a polyurethane (1), composed ofa1) diisocyanates a1.1) which comprise structural units of the formula (I) â€”N&boxH;C&boxH;Nâ€”â€ƒâ€ƒ(I) â€ƒand, optionally, those a1.2) which are free from structural units of the formula (I), b1) diols, of which b1.1) from 10 to 100 mol-%, based on the total amount of the diols (b1), have a molecular weight of from 500 to 5000 g/mol, and b1.2) from 0 to 90 mol-%, based on the total amount of the diols (b1), have a molecular weight of from 62 to 500 g/mol, c1) monomers which are chemically different from the monomers (a1) and (b1) and which have at least one isocyanate group or at least one isocyanate-reactive group and which, furthermore, carry at least one hydrophilic group or one potentially hydrophilic group, thereby rendering the polyurethanes dispersible in water, d1) optionally, further polyfunctional compounds which are different from the monomers (a1) to (c1) and which have reactive groups which are alcoholic hydroxyls, primary or secondary amino groups or isocyanate groups, and e1) optionally, monofunctional compounds which are different from the monomers (a1) to (d1) and which have a reactive group which is an alcoholic hydroxyl, a primary or secondary amino group or an isocyanate group.