特論講座
ポリウレタンの科学と技術 ポリウレタンはどこまでわかったか．
Ⅲ ポリウレタンの原料の進歩
キーワード:
Reaction Mechanism of NCO,
Polymer Glycols,
Disocyanates,
Chain Extenders,
Crosslinking Agents,
Catalysts
2018 年 91 巻 11 号 p. 406-414
詳細
2018 年 91 巻 11 号 p. 406-414
Polyurethanes are synthesized by reaction of polymer glycols, diisocyanates and active hydrogen compounds as chain extenders (curing agents). Chain extenders are low molecular glycol and diamine. Elucidation of the reaction mechanism of isocyanate with active hydrogen compound is indispensable to expand the dream to create new polyurethane. Recent advances in computer chemistry has greatly contributed to understand the reaction mechanism of active hydrogen-containing compound and isocyanate. This article, at first, reviewed the progress of the reaction mechanism of isocyanate, and then described the features of the new diisocyanates, polyol, curing agent, and catalyst.
