申请人:Bayer Aktiengesellschaft
公开号:US04820866A1
公开(公告)日:1989-04-11
Diisocyanates corresponding to a specified formula are produced by reacting an alcohol corresponding to a specified formula with a nitrochlorobenzene in the presence of NaOH and/or KOH in powder form and a strongly polar, aprotic solvent to produce a dinitro compound corresponding to a specified formula. This dinitro compound is hydrogenated to form the corresponding diamine which diamine is phosgenated to produce the corresponding diisocyanate. The resultant diisocyanates may then be used as starting materials in polyisocyanate addition processes.
根据特定公式,相应的二异氰酸酯是通过将相应公式的醇与硝基氯苯在NaOH和/或KOH粉末和强烈极性、非质子溶剂的存在的条件下反应,产生相应公式的二硝基化合物。这种二硝基化合物经氢化形成相应的二胺,该二胺经光气化反应产生相应的二异氰酸酯。由此产生的二异氰酸酯随后可用作聚异氰酸酯加成工艺的起始材料。