Lesson 2 Chemical principles and raw materials

2.2.1IsocyanatesAsarule,isocyanatesareobtainedbythephosgenationofthecorrespondingprimaryamines(Fig.2-1).Fig.2-1ManufactureofisocyanatesbyphosgenationofprimaryaminesAlternatively,phosgene-freemanufacturingprocesseshavebeendeveloped.Onesuchprocessinvolvesre ......(共32492字)[阅读本文]>>



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