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    • 97. 发明公开
    • ADDITIVE FOR SILICA REINFORCED RUBBER FORMULATIONS
    • 添加剂FÜRMITKIESELSÄUREVERSTÄRKTEKAUTSCHUKZUSAMMENSETZUNGEN
    • EP3045493A1
    • 2016-07-20
    • EP16151572.1
    • 2016-01-15
    • Flow Polymers LLC
    • PUHALA, Aaron S.ADEPETUN, Adeyemi A.
    • C08K3/36C08K5/00B60C1/00C08K5/057
    • C08K5/057B60C1/0016B60C9/02B60C11/0008B60C15/00C08K3/36C08K5/0025C08L21/00
    • This invention is based upon the discovery that the silica compounding additives of this invention can be included in silica reinforced rubber formulations to increase the low strain dynamic stiffness exhibited by the rubber composition without a substantial increase in the cured compound hysteresis. This increase in stiffness allows for use of process aids that would otherwise result in an unacceptable further reduction in low strain dynamic stiffness. The present invention specifically discloses a rubber formulation which is comprised of (1) a rubbery polymer, (2) a reinforcing silica, and (3) a silica compounding additive of the structural formula:

      wherein M represents a divalent metal, and wherein R 1 and R 2 can be the same or different and are selected from the group consisting of hydrogen atoms, alkyl groups, alkylene groups, hydroxyl substituted alkyl or alkylene groups, amine substituted alkyl or alkylene groups and thiol substituted alkyl or alkylene groups.
    • 本发明基于以下发现:本发明的二氧化硅复合添加剂可以包含在二氧化硅增强的橡胶配方中,以增加橡胶组合物显示的低应变动态刚度,而固化化合物滞后没有显着增加。 这种刚性的增加允许使用加工助剂,否则会导致低应变动态刚度的不可接受的进一步降低。 本发明具体公开了一种橡胶配方,其包括(1)橡胶状聚合物,(2)增强二氧化硅,和(3)具有以下结构式的二氧化硅复合添加剂:其中M表示二价金属,其中R 1 和R 2可以相同或不同,并且选自氢原子,烷基,亚烷基,羟基取代的烷基或亚烷基,胺取代的烷基或亚烷基和硫醇取代的烷基或亚烷基。