| 摘要 |
PURPOSE: A natural polyol and polyurethane are provided to maximize added value of environment friendly business and urethane-related business, and to increase added value of a bio-byproducts. CONSTITUTION: A natural polyol comprises: a step of synthesizing natural polyol precursor by reacting natural oil and cyclic anhydride having an alcohol group(-OH); and a step of synthesizing natural polyol in which a primary alcohol group is accepted by reacting alcohol amine compound and the natural polyol precursor. The natural oil comprises one or more kinds selected from soybean oil, almond oil, apricot stone oil, avocado oil, corn oil, cottonseed oil, l, grape seed oil, hazelnut oil, sunflower seed oil, palm oil and castor oil. |
