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    • 3. 发明授权
    • Preparation of low hysteresis rubber by reacting a lithium polymer with a sulfur containing reagent
    • 通过使锂聚合物与含硫试剂反应制备低滞后橡胶
    • US06579949B1
    • 2003-06-17
    • US10020666
    • 2001-10-30
    • William L. HergenrotherChristine M. RademacherJames D. Ulmer
    • William L. HergenrotherChristine M. RademacherJames D. Ulmer
    • C08F834
    • C08L15/00C08C19/44C08F8/42
    • A vulcanized elastomeric composition of matter comprises the reaction product of a sulfur-containing reagent with an anionic living polymer, the reagent being selected from the group consisting of R3—Si—S—R′—X, where R can all be the same or different and is selected from the group consisting of alkyls having from 1 to 8 carbon atoms, cycloalkyls having from 3 to 11 carbon atoms, or an arylene having from 6 to 14 carbon atoms, and X is a halogen, to form a R3—Si—S—R′ ended polymer; a filler; processing oil; and a cure package containing a deprotecting agent and at least one sulfur cure accelerator. A method for making a vulcanized elastomeric composition of matter comprises terminating a living anionic polymer with a sulfur-containing reagent selected from the group consisting of R3—Si—S—R′—X, where R can all be the same or different and is selected from the group consisting of alkyls having from 1 to 8 carbon atoms, cycloalkyls having from 3 to 11 carbon atoms, or aryls having from 6 to 14 carbon atoms, R′ is an alkylene having from 1 to 8 carbon atoms, a cycloalkylene having from 3 to 11 carbon atoms, or an arylene having from 6 to 14 carbon atoms, and X is a halogen, to form a R3—Si—S—R′ polymer having a protected mercapto group; deprotecting the mercapto group prior to or during vulcanization of the composition, and attaching the mercapto group to a polymer backbone of one of the polymers. A method is also provided for reducing hysteresis and the invention provides improved pneumatic tires.
    • 硫化弹性体组合物包含含硫试剂与阴离子活性聚合物的反应产物,该试剂选自R3-Si-S-R'-X,其中R可全部相同,或 不同且选自具有1至8个碳原子的烷基,具有3至11个碳原子的环烷基或具有6至14个碳原子的亚芳基,X是卤素,以形成R3-Si -SR'末端聚合物; 填料; 加工油; 和含有脱保护剂和至少一种硫固化促进剂的固化包装。 制备硫化弹性体组合物的方法包括用选自R3-Si-S-R'-X的含硫试剂终止活性阴离子聚合物,其中R可以相同或不同,并且是 选自具有1至8个碳原子的烷基,具有3至11个碳原子的环烷基或具有6至14个碳原子的芳基,R'是具有1至8个碳原子的亚烷基,具有 或具有6至14个碳原子的亚芳基,X为卤素,形成具有被保护的巯基的R3-Si-SR'聚合物; 在组合物硫化之前或期间使巯基脱保护,并将巯基连接到聚合物之一的聚合物主链上。 还提供了一种减小滞后的方法,本发明提供了改进的充气轮胎。