Polycyclic trisaminomethanes of the formula ##STR1## in which R.sup.1 and R.sup.2, alike or different, are alkylene; R.sup.3 and R.sup.4, alike or different, are alkyl, cycloalkyl, or aralkyl; or R.sup.3 and R.sup.4 are joined together to form an alkylene group which may be interrupted by (1) ##STR2## WHERE Q is hydrogen or alkyl, or (2) ONE OR TWO --O-- linkages; and There are at least 2 carbons between each two hetero atoms in the outer ring system, are useful as initiators for the polymerization of pivalolactone. These polycyclic trisaminomethanes are prepared by reacting a polyamine of the formula R.sup.3 NHR.sup.1 NHR.sup.2 NHR.sup.4 with a dialkoxy(dialkylamino)methane of the formula (RO).sub.2 CHNR'.sub.2 in which R and R', alike or different, are alkyl.
化学式为##STR1##的多环三
氨甲烷,其中R.sup.1和R.sup.2,相同或不同,为烷基; R.sup.3和R.sup.4,相同或不同,为烷基、环烷基或芳基烷基; 或者R.sup.3和R.sup.4结合在一起形成一个烷基,该烷基可被(1) ##STR2##其中Q为氢或烷基,或(2)一个或两个--O--连接所打断;在外环系统中,每两个杂原子之间至少有2个碳,可用作
吡烷内酯聚合的
引发剂。这些多环三
氨甲烷是通过将式为R.sup.3 NHR.sup.1 NHR.sup.2 NHR.sup.4的
多胺与式为(RO).sub.2 CHNR'.sub.2的二烷氧基(二烷基
氨基)
甲烷反应制备而成,其中R和R'相同或不同,为烷基。