申请人:Air Products and Chemicals, Inc.
公开号:US04794194A1
公开(公告)日:1988-12-27
This invention relates to a class of alkenylated toluenediisocyanates having at least one alkenyl group ortho to an isocyanate group. More particularly the toluendiisocyanates are represented by the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are hydrogen, C.sub.1-3 aliphatic, phenyl, halogen or alkoxy radicals, or R.sub.2 and R.sub.4 or R.sub.5 are bridged via an alkylene radical --(CH.sub.2).sub.y --wherein y=2 to 5, and x is one or two provided that in said formula at least one of R.sub.1, R.sub.2, R.sub.3, R.sub.4 or R.sub.5 is C.sub.1 or greater. The above described alkenylated toluenediisocyanates have been found to be well suited for preparing crosslinkable condensation polymers by providing pendant unsaturation for post curing and polymerization. They are also well suited for preparing polyurethane and polyurea elastomer systems.
本发明涉及一类至少具有一个烯丙基团正交于异氰酸酯基团的甲苯二异氰酸酯。更具体地说,甲苯二异氰酸酯由以下公式表示:##STR1##其中R.sub.1、R.sub.2、R.sub.3、R.sub.4和R.sub.5为氢、C.sub.1-3脂肪基、苯基、卤素或烷氧基,或R.sub.2和R.sub.4或R.sub.5通过一个烷基--(CH.sub.2).sub.y --桥连,其中y=2至5,x为1或2,前提是在所述公式中,至少有一个R.sub.1、R.sub.2、R.sub.3、R.sub.4或R.sub.5为C.sub.1或更大。发现上述所述的烯丙基化甲苯二异氰酸酯非常适合通过提供后交联和聚合的悬挂不饱和度来制备交联缩聚聚合物。它们也非常适合制备聚氨酯和聚氨酯弹性体系统。