ABSTRACT
All the polyester or polyether polyols tested are compatible with poly bd R45HTLO in low proportions ranging from 10 to 50% of the total weight of the resulting blend. Compatibility of those polyols with poly bd resin is affected by polyol type, functionality and molecular weight. Polypropylene glycols are in general more compatible with poly bd resin than polytetramethylene glycols and those polyols containing aromatic groups. Among polypropylene glycols, it appears that diols are more compatible than triols of the same molecular weight. For the same type of polyols, the solubility in poly bd resin increases with the molecular weight of polyols.
Tensile and tear strength of the polyurethanes made from the polyol blends and Isonate 143L (MDI) decrease with increased amount of poly bd resin. However, poly bd resin improves the water resistance of the final material.
