Biorenewable high performance polyester polyols

A two component polyurethane system, comprising:

• an isocyanate component;
• and
• a polyol component comprising a polyester polyol containing at least 50% biorenewable content;
• wherein the polyester polyol comprises, in reacted form, biorenewable succinic acid, biorenewable 1,3-propanediol, biorenewable isosorbide, and an optional dimer or trimer acid;
• wherein the polyester polyol is prepared by a process comprising an initial reaction where the biorenewable succinic acid reacts with the secondary hydroxyl groups of the biorenewable isosorbide, and
• wherein a majority of the hydroxyl groups of the polyester polyol are primary hydroxyl groups.