申请人:Bayer Aktiengesellschaft
公开号:US04404379A1
公开(公告)日:1983-09-13
The present invention is concerned with a new class of compounds prepared by reacting cyclic aminals of the formula ##STR1## with polyisocyanates of the formula R.sub.5 (NCO).sub.m+n to yield ##STR2## and with this process for obtaining said compounds, as well as the use of such compounds in polyurethane chemistry. If such compounds are free of isocyanates (n=0) they are useful as latent cross-linkers or hardeners activatable by heat or moisture. If such compounds carry free isocyanate groups (n=1 or 2) there are useful as synthetic resin precursors. In the above formulae m represents an integer of from 1 to 3, and n represents 0, 1 or 2, and the sum of m+n is 2 or 3, R.sub.1 represents an aliphatic hydrocarbon group which is optionally cyano-substituted and which has from 1 to 6 carbon atoms, a cycloaliphatic hydrocarbon group having from 5-10 carbon atoms or an araliphatic hydrocarbon group having from 7-10 carbon atoms; R.sub.2 represents a divalent aliphatic hydrocarbon group having from 2 to 6 carbon atoms, at least two carbon atoms being situated between the two nitrogen atoms; R.sub.3 and R.sub.4 are identical or different and represent hydrogen, aliphatic hydrocarbon groups having from 1 to 18 carbon atoms, cycloaliphatic hydrocarbon groups having from 5 to 10 carbon atoms or aromatic hydrocarbon groups having from 6 to 10 carbon atoms, or the two groups R.sub.3 and R.sub.4 together with the carbon atom of the heterocyclic ring may also form a 5-membered or 6-membered cycloaliphatic ring; and R.sub.5 represents an (m+n)-valent group such as that which can be obtained by the removal of m+n isocyanate groups from an (m+n)-valent polyisocyanate.
本发明涉及一种新的化合物类,通过将公式为 ##STR1## 的环状氨基缩醛与公式为 R.sub.5 (NCO).sub.m+n 的多异氰酸酯反应制备出 ##STR2## 并且涉及该过程用于获得所述化合物,以及在聚氨酯化学中使用这种化合物。如果这种化合物不含异氰酸酯(n=0),它们可用作热或湿度激活的潜在交联剂或硬化剂。如果这种化合物带有自由异氰酸酯基团(n=1或2),则它们可用作合成树脂前体。在上述公式中,m表示1至3的整数,n表示0、1或2,m+n的总和为2或3,R.sub.1表示一种具有1至6个碳原子的脂肪烃基,该基可以选择性地被氰基取代,或者是具有5-10个碳原子的环脂肪烃基或7-10个碳原子的芳基脂肪烃基;R.sub.2表示一种具有2至6个碳原子的二价脂肪烃基,其中至少有两个碳原子位于两个氮原子之间;R.sub.3和R.sub.4相同或不同,表示氢、具有1至18个碳原子的脂肪烃基、具有5至10个碳原子的环脂肪烃基或具有6至10个碳原子的芳基脂肪烃基,或者R.sub.3和R.sub.4两个基团与杂环环上的碳原子也可以形成5-或6-成员的环脂肪烃环;R.sub.5表示一个(m+n)价基团,该基团可以通过从(m+n)价多异氰酸酯中去除m+n个异氰酸酯基团获得。