The raw materials of the main soft chain segments of polyurethane produced on an industrial scale are classified into the following types: polyether type represented by polytetramethylene glycol; Polyester polyol type represented by adipate ester series esters; The lactone type represented by polycaprolactone k ester; Or polycarbonate type represented by polycarbonate diol. Polycarbonate diol is used in polyurethane for artificial leather, synthetic leather, coatings, coating agents, adhesives, etc.
