公开(公告)号：US4960831A

公开(公告)日：1990-10-02

申请号：US398298

申请日：1989-08-24

申请人： Carl L. Willis ,  Michael F. Conway ,  Michael K. Martin

发明人： Carl L. Willis ,  Michael F. Conway ,  Michael K. Martin

IPC分类号： C08F8/00

CPC分类号： C08F8/00

摘要： Elastomeric polymers comprising at least one alkali metal atom are modified by incorporating at least one group capable of sterically hindering coupling reactions which frequently occur when functional groups are subsequently incorporated into such polymers. In general, the group capable of sterically hindering coupling reactions may be incorporated by reacting the elastomeric polymer comprising at least one alkali metal atom with a compound containing a group capable of reacting with the elastomeric polymer at one end and at least one pendant group larger than hydrogen at the other. Groups that will react with elastomeric polymers comprising at least one alkali-metal atom are of course, well known, in the art, and include groups containing sulfur, oxygen, nitrogen and the like and ethylenically and acetylenically unsaturated groups. Compounds containing terminal ethylenically unsaturated groups are particularly useful in preparing the modified elastomeric polymers of this invention. Terminal groups capable of sterically hindering coupling reactions, generally, include all groups larger than hydrogen. Hydrocarbon groups are, however, particularly useful since these generally do not alter the properties which are characteristic of the elastomeric polymers. Aromatic groups containing at least 6 carbon atoms or cyclic hydrocarbon groups containing at least 5 carbon atoms are particularly effective. 1,1-diphenyl ethylene is particularly preferred in the present invention. Elastomeric polymers which have been modified in accordance with this invention may then be functionalized with less risk of undesirable coupling.

摘要翻译： 包含至少一个碱金属原子的弹性体聚合物通过引入至少一个能够空间阻碍偶联反应的基团而被修饰，当随后将官能团引入到这些聚合物中时，它们经常发生。 通常，能够空间阻碍偶联反应的基团可以通过使包含至少一个碱金属原子的弹性体聚合物与含有能够在一端与弹性体聚合物反应的基团和至少一个大于 另一方面是氢气。 与本领域技术人员众所周知的将包含至少一个碱金属原子的弹性体聚合物反应的基团包括含有硫，氧，氮等的烯基和炔属不饱和基团。 含有末端烯键式不饱和基团的化合物特别适用于制备本发明的改性弹性体聚合物。 能够空间阻碍偶联反应的末端基团通常包括大于氢的所有基团。 然而，烃基是特别有用的，因为它们通常不改变弹性体聚合物特性的性质。 含有至少6个碳原子的芳族基团或含有至少5个碳原子的环状烃基是特别有效的。 在本发明中特别优选1,1-二苯基乙烯。 然后可以将具有根据本发明改性的弹性体聚合物功能化，具有较少的不期望的偶联的风险。