公开(公告)号：US20190315945A1

公开(公告)日：2019-10-17

申请号：US16346897

申请日：2017-10-20

申请人： BRIDGESTONE CORPORATION

发明人： Valeria GRENCI ,  Raffaele DI RONZA

IPC分类号： C08L9/06 ,  B60C1/00 ,  C08K3/36 ,  C08K3/22 ,  C08K3/06 ,  C08K5/092 ,  C08K5/3437 ,  C08K5/00 ,  C08K5/47

摘要： A process for the preparation of a rubber compound for a pneumatic tyre portion. The process comprises a first non-productive mixing step, wherein, at least one cross-linkable unsaturated-chain polymer base, silica, a silane bonding agent comprised within the class of trialkoxymercaptoalkyl-silanes are mixed together and a productive mixing step, wherein, at least a vulcanization system and Zn oxide are added and blended to the compound under preparation. The silica is functionalized with dicarboxylic acids and the first non-productive mixing step does not comprise Zn oxide.