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1 Results Polypropylene polyol is very important chemical materials for polyurethane. We developed newly designed polypropylene polyol with terminated primary hydroxyl group. We focus on our new polypropylene polyol, and show its useful application for polyurethane foam. Polymerization of propyleneoxide is conventionally carried out in anionic polymerization process. In anionic process α-cleavage of propyleneoxide occurs rather than β-cleavage. Then the terminal hydroxyl group of the resulting polypropyleneoxide is almost all the secondary alcohol (ca. 98%). We found that Tris(pentafuluorophenyl) boron has high activity as catalyst for polymerization of propyleneoxide. The polymerization of propyleneoxide under Tris(pentafuluorophenyl) boron catalyst is mainly controlled to be α-cleavage (c.a.70%) because of its bulky substituent shown in Fig. 1.
We focused on our new polypropylene polyol, and its useful application for polyurethane foam. Polymerization of propyleneoxide is conventionally carried out in anionic The terminal hydroxyl group of the resulting polypropyleneoxide is almost all the secondary alcohol (ca. 98%). We found that Tris (pentafuluorophenyl) boron has high activity as catalyst for polymerization of propyleneoxide. The polymerization of propyleneoxide under Tris (pentafuluorophenyl) boron catalyst is mainly controlled to be α-cleavage (ca70%) because of its bulky elections shown in Fig.