Hexamethylene diisocyanate

解説ヘキサメチレンジイソシアナート,刺激臭を有する無色の液体．融点－67 ℃，沸点140～142 ℃(2.8 kPa)．n20D1.453．d204 1.047．引火点130 ℃．水と加熱するとポリヘキサメチレン尿素を，濃塩酸と加熱するとヘキサメチレンジアミンになる．ポリウレタンの製造原料，繊維処理剤として用いられる．森北出版「化学辞典（第2版）

用途塗料、接着剤、コーティング加工用樹脂の原料

用途有機合成原料。

説明This diisocyanate compound is used in the manufacture of various polyurethane products: elastic and rigid foams, paints, lacquers, adhesives, bin ding agents, synthetic rubbers, and elastomeric fibers.

使用Hexamethylene diisocyanate (HDI) is one of the most common aliphatic disocyanates, It is a monomer used in the production of polyurethane foams and exceptionally high-quality coatings, and is found in some industrial paints and spray painting operations. It is a compound which reacts readily with water and alcohols (Von Burg 1993). It has a vapor pressure of 0.05 mm Hg at room temperature, but can be present in aerosol form allowing a potentially higher exposure to individuals. The HDI-BT trimer is often present for similar industrial uses. It would be expected to have a lower vapor pressure; however, the aerosol form can also be present, allowing potentially higher exposure of HDI-BT to individuals. Hexamethylene diisocyanate reacts slowly with water to form carbon dioxide (HSDB 1996). The base-catalyzed reaction of Hexamethylene diisocyanate with alcohols should be carried out in inert solvents; the reaction may occur with explosive violence in the absence of solvents (NFPA 1994).

一般的な説明A colorless crystalline solid. Toxic by ingestion and is strongly irritating to skin and eyes. 1,6-Diisocyanatohexane is used to make nylon.

製造方法Hexamethylene diisocyanate (HDI) is prepared by the phosgenation of hexamethylenediamine (section lO.2.2(b)): H2N-(CH2)6-NH2--COCl2-->OCN-(CH2)6-NCOHexamethylene diisocyanate is a liquid with a volatility of the same order as that of tolylene diisocyanate. It is respiratory irritant and also has powerful effects on the skin and eyes. Hexamethylene diisocyanate was one of the first diisocyanates utilized for making polyurethanes, being used to prepare fibres and moulding compounds. These applications are no longer of importance but hexamethylene diisocyanate now finds use mainly in coatings which are more light stable than those based on aromatic isocyanates.

合成方法ナイロン66の原料でもあるヘキサメチレンジアミンを不活性溶剤下，ホスゲンと反応させて得られる