This invention relates to a class of alkenylated dianilines having at least one alkenyl group ortho to an amine group and in conjugated relationship to the ring. More particularly the dianilines are represented by the formula:
wherein R₁, R₂, R₃, R₄ and R₅ are hydrogen, C₁₋₃ aliphatic, phenyl, halogen or alkoxy radicals, or R₂ and R₄ or R₅ are bridged via an alkylene radical -(CH₂)y- wherein y=2 to 5, and provided not more than one is phenyl, halogen or alkoxy, X is methylene, alkylene, or branched C₁-C₆ alkylene group, oxygen, sulfur, carbonyl, sulfonyl; or per fluoroalkylene group, n=1 or 0, and z=0 or 1.
The above described alkenylated dianilines have been found to be well suited as tri-and tetra functional chain extenders in forming polyurethane/urea elastomers systems and for providing pendant unsaturation for post curing and polymerization.
本发明涉及一类至少有一个烯基与胺基正交并与环呈共轭关系的烯化
二苯胺。更具体地说,这些
二苯胺由式表示:
其中 R₁、R₂、R₃、R₄ 和 R₅ 是氢、C₁₋₃ 脂肪族、苯基、卤素或烷氧基,或 R₂ 和 R₄ 或 R₅ 通过亚烷基-(CH₂)y-桥接,其中 y=2 至 5、且不超过一个为苯基、卤素或烷氧基,X 为亚甲基、亚烷基或支链 C₁-C₆亚烷基、氧、
硫、羰基、磺酰基;或每一个
氟亚烃基,n=1 或 0,z=0 或 1。
研究发现,上述烯化
二苯胺非常适合作为三官能团和四官能团的扩链剂,用于形成聚
氨酯/
尿素弹性体体系,并为后固化和聚合提供悬垂的不饱和度。