公开(公告)号：US4310692A

公开(公告)日：1982-01-12

申请号：US186355

申请日：1980-09-11

申请人： Kurt Findeisen ,  Reinhard Freimuth ,  Kuno Wagner

发明人： Kurt Findeisen ,  Reinhard Freimuth ,  Kuno Wagner

IPC分类号： C07C275/06 ,  C07C67/00 ,  C07C239/00 ,  C07C273/18 ,  C07C127/15

CPC分类号： C07C273/1863

摘要： The instant invention is directed to a process for the preparation of an alkyl-substituted urea of the formula ##STR1## wherein R and R', which may be the same or different, represents hydrogen or a saturated hydrocarbon radical, provided that at least one represents a saturated aliphatic hydrocarbon radical, comprising reacting, unpressurized, at from 110.degree. to 170.degree. C., urea with an amine having a boiling point, under normal pressure, at least 10.degree. C. below the reaction temperature, said amine corresponding to the formula: ##STR2## wherein R and R' are as defined above, and wherein for each mol of urea present, at least one mol of amine is used, the improvement wherein the reaction is carried out in the presence of from 20 to 95% by weight, based on the total quantity of reactants and auxiliary agents, if any, of an organic liquid boiling, under normal pressure, above the reaction temperature, which is inert under the reaction conditions and which serves as a dispersing agent or a solvent for the urea and for the product of the process and is a solvent for the amine.

摘要翻译： 本发明涉及一种制备式IMA的烷基取代脲的方法，其中R和R'可以相同或不同，表示氢或饱和烃基，条件是至少一个 表示饱和脂族烃基，其包括在110-170℃下将脲与常压下的沸点低于反应温度至少10℃的胺反应，所述胺对应于 其中R和R'如上所定义，并且其中对于每摩尔存在的脲，使用至少1摩尔的胺，其改进在于反应在20至95的存在下进行 基于反应物和辅助剂（如果有的话）在常压下沸点高于反应温度的反应物和辅助剂的总量，反应温度在反应条件下是惰性的并且用作分散剂或 用于尿素和该方法的产物的溶剂，并且是胺的溶剂。

公开(公告)号：US4166067A

公开(公告)日：1979-08-28

申请号：US947916

申请日：1978-10-02

申请人： Reinhard Freimuth ,  Kuno Wagner ,  Kurt Findeisen ,  Klaus Konig ,  Peter Heitkamper

发明人： Reinhard Freimuth ,  Kuno Wagner ,  Kurt Findeisen ,  Klaus Konig ,  Peter Heitkamper

IPC分类号： C07C265/04 ,  C07C20060101 ,  C07C67/00 ,  C07C241/00 ,  C07C263/06 ,  C07C118/00

CPC分类号： C07C263/06

摘要： This disclosure relates to a process for the preparation of alkoxymethylisocyanates by reacting alkoxylmethyl tri-substituted ureas with isocyanates which have higher boiling points than the alkoxy methyl isocyanates produced. The process is also applicable to alkenoxy methyl tri-substituted ureas to make the corresponding isocyanates. Ureas of commercial purity may be used to obtain good yields of isocyanate when between about 0.03 and 0.2 mol of carbodiimide groups are present per mol of urea group. The carbodiimide containing compounds may also carry free isocyanate groups, in which case they should have a boiling point above that of the isocyanate product.