Polyurethane with unique polyols based on branched and long chain diols, 3-methyl-l,5-pentanediol and 1,9-nonanediol

摘要

It is possible to achieve desired physical properties by improving the primary structure of polyurethane raw materials to enhance the function of the polyurethane. In this study polyester polyols and polycarbonate diols were synthesized using a diol with a branched structure or a straight long carbon chain as a raw material, and the physical properties of these polyols were checked. Further, polyurethanes were synthesized using these polyols as a raw material, and the physical properties of these polyurethanes were checked. Polyester poly-ol-based polyurethane resins generally have a high durability, but have a problem with water resistance and flexibility. The introduction of polyester polyols and polycarbonate polyols with a branched structure or a straight long carbon chain improves water resistance, which is a weak point of polyester polyol-based polyurethanes in general, and provides flexibility equal to or greater than that of polyether poly-ol-based polyurethanes, while high durability is maintained. The use of the diols presented in this paper enables the production of polyols and polyurethanes with excellent physical properties.