Diene polymers and copolymers terminated by reaction with n-alkyl and n-aryl imines
申请人:BRIDGESTONE/FIRESTONE, INC.
公开号:EP0451604A2
公开(公告)日:1991-10-16
A process is provided for preparing a terminally functionalized polymer from a living polymer obtained by anionic polymerization of a diene monomer or mixture of a diene monomer and a vinyl aromatic hydrocarbon monomer which comprises reacting the living polymer with a compound having the formula:
wherein R₁ and R₂ are selected from the group consisting of H, alkyl, cycloalkyl, aryl, dialkylaminoaryl, aralkyl, and aprotic O, N and S- containing alkyl, cycloalkyl, aryl and aralkyl groups; wherein R₃ is selected from the group consisting of alkyl, cycloalkyl, aryl, dialkylaminoaryl, aralkyl, and aprotic O, N and S- containing alkyl, cycloalkyl, aryl and aralkyl groups; with the proviso that at least one of the R₁, R₂ and R₃ groups must be a dialkylaminoaryl group and that not all of the R₁, R₂ and R₃ groups can be aryl groups.
The resultant terminally functionalized polymer has reduced hysteresis properties and may be utilized to prepare elastomer compositions and tire treads having reduced rolling resistance.
本发明提供了一种工艺,用于从二烯烃单体或二烯烃单体与乙烯基芳香烃单体混合物阴离子聚合得到的活聚合物制备端官能化聚合物,该工艺包括使活聚合物与具有以下式子的化合物反应:
其中 R₁和 R₂ 选自 H、烷基、环烷基、芳基、二烷基氨基芳基、芳烷基和含有 O、N 和 S 的烷基、环烷基、芳基和芳烷基组成的组;其中 R₃ 选自烷基、环烷基、芳基、二烷基氨基芳基、芳烷基和含有烷基、 环烷基、芳基和芳烷基的烷基 O、N 和 S-基团组成的组;但 R₁、R₂ 和 R₃ 基团中至少有一个必须是二烷基氨基芳基,且并非所有的 R₁、R₂ 和 R₃ 基团都可以是芳基。
由此得到的末端官能化聚合物具有较低的滞后特性,可用于制备具有较低滚动阻力的弹性体组合物和轮胎胎面。