| 摘要 |
The present invention relates to a method for manufacturing polyurethane from biopolyol, comprising: (A) a step of manufacturing free fatty acids by hydrolyzing animal and vegetable oils; (B) a step of manufacturing dimer acids by polymerizing the free fatty acids under high pressure and high temperature; (C) a step of manufacturing polypropylene glycol by making the dimer acids react with propylene oxides; and (D) a step of manufacturing polyurethane by making the polypropylene glycol react with diisocyanate. |
