申请人:The Upjohn Company
公开号:US04339381A1
公开(公告)日:1982-07-13
1,3-alkylene-diazetidinediones-2,4, wherein alkylene contains at least 8 carbon atoms, are described. These compounds, which can be regarded as intramolecular dimers of alkylene diisocyanates, give rise to the latter on heating. Accordingly, these compounds are useful in a variety of situations in which it is desirable to have a compound which is stable on storage in admixture with other compounds such as polyols, polyamines and the like (which latter would react with a compound containing free isocyanate groups) but which can, at any desired moment, be converted by heating to the free diisocyanate. The latter then reacts with the other component(s) of the mixture to form a polymer. The above compounds are derived by cyclization of the appropriate cyclic allophanoyl halide.
本文介绍了含有至少8个碳原子的1,3-烷基-二氮杂环己酮-2,4。这些化合物可以看作是烷基二异氰酸酯的分子内二聚体,在加热时会产生后者。因此,这些化合物在需要具有稳定性的情况下与其他化合物(如多元醇、多胺等)混合存储时非常有用(后者会与含有自由异氰酸基团的化合物反应),但可以在任何需要的时候通过加热转化为自由的二异氰酸酯。后者然后与混合物的其他成分反应形成聚合物。上述化合物是通过适当的环丙烷酰卤素的环化反应得到的。