Stable star-structured functional polyolefins and methods of making them, the functional polyolefins comprising a polyolefin bound at any position along its chain length to at least one nucleophile-containing silane of the following formula:
wherein Y is a di- or trivalent linker group selected from heteroatoms, C1 to C10 alkylenes, and other groups disclosed herein; Nu is a nucleophilic atom or unsaturation group; R5 is selected from hydrogen, and C1 to C10 alkyls, and other groups as disclosed herein; X is a divalent group selected from linear and branched alkylenes and heteroatom-alkylenes, and other groups as disclosed herein; and PO is a polyolefin having a weight average molecular weight of at least 400 g/mole; with the proviso that at least one of R1, R2, and R3 is selected from the same or different functional polyolefin moieties. Star-structured functional polyolefins are useful as filler dispersive additives in tire formulations and processing aids.
稳定的星形结构官能团聚烯烃及其制造方法,这种官能团聚烯烃包括在其链长的任意位置与下式中至少一种含亲核
硅烷结合的聚烯烃:
其中 Y 是二价或三价连接基团,选自杂原子、C1 至 C10 烷基和本文公开的其它基团;Nu 是亲核原子或不饱和基团;R5 选自氢、C1 至 C10 烷基和本文公开的其它基团;X 是二价基团,选自直链和支链烷基和杂原子烷基,以及本文公开的其他基团; PO 是聚烯烃,其重量平均分子量至少为 400 克/摩尔;但 R1、R2 和 R3 中至少有一个选自相同或不同的功能性聚烯烃分子。星形结构官能团聚烯烃可用作轮胎配方和加工助剂中的填料分散添加剂。