Novel compounds which upon heating are converted into the corresponding phenol which is a catalyst for the trimerization of compounds having isocyanato groups to form isocyanurates have the formula: ##STR1## in which N REPRESENTS AN INTEGER OF FROM 1 TO 4 A represents an aromatic hydrocarbon group obtained by removing the NCO group from a monomeric aromatic monoisocyanate containing 6 - 14 carbon atoms, R.sub.1 and R.sub.2 may be the same or different and represent a C.sub.1 to C.sub.6 alkyl group or a polymethylene chain containing 4 to 8 carbon atoms which together with the nitrogen atom form a heterocyclic ring, R.sub.3 may be hydrogen, chlorine, bromine or a C.sub.1 - C.sub.18 -alkyl group.
通过加热转化为对应的
酚催化剂,可使具有
异氰酸酯基团的化合物三聚形成异
氰酸脲的新化合物具有以下式子:##STR1## 其中N表示1到4的整数,A表示从含有6-14个碳原子的单体芳香单
异氰酸酯中去除NCO基团得到的
芳香烃基团,R1和R2可以相同或不同,表示C1到C6烷基或含有4到8个碳原子的聚亚甲基链,与氮原子一起形成杂环环,R3可以是氢、
氯、
溴或C1-C18烷基。