Dihydroxyfatty acids as structural elements for polyurethanes

摘要

PCT No. PCT/EP92/01308 Sec. 371 Date Dec. 7, 1993 Sec. 102(e) Date Dec. 7, 1993 PCT Filed Jun. 11, 1992 PCT Pub. No. WO93/00378 PCT Pub. Date Jan. 7, 1993.A process for the production of carboxyfunctional polyurethane from dihydroxyfatty acids and/or dihydroxypolyfatty acids as isocyanate-reactive compounds bearing an ionizable group is provided. The dihydroxycarboxylic acids and/or dihydroxypolyfatty acids have no shielding molecular group near the carboxy group, more particularly not in the alpha-position to the carboxy group, and thus give particularly good results when used as a structural element for the production of polyurethanes. Also provided are polyurethanes and aqueous polyurethane dispersions produced using the dihydroxyfatty acids.