SAPONIFICATION RESISTANT POLYOLS FOR POLYURETHANE APPLICATIONS BASED ON OLEOCHEMICAL RAW-MATERIALS

Fatty alcohol hydrogenation technology is used for manufacturing of interesting polyfunctional alcohols from unsaturated fatty raw materials. Two synthetic approaches are discussed: the preparation of C20-alcohols with two primary and one secondary OH-group by hydrogenation of ring-opening products of epoxidized methylesters and the preparation of C36-dimer fatty alcohols with two primary OH-groups, which are derived from dimer fatty acids. Requirements for special applications like high difunctionality can be achieved by using the appropriate dimer acid as starting material. These hydrophobic polyols contain no ester groups and are therefore useful for preparation of polyurethanes resistant to saponification.