The invention relates to a process for the preparation of a rubber composition involving thermomechanically mixing in a preparatory mixing step at least one sulfur vulcanizable elastomer, a particulate filler and an unsymmetrical organosilicon disulfide compound of the formula
wherein Z is selected from the group consisting of:
wherein R2 may be the same or different and is independently selected from the group consisting of an alkyl group having 1 to 4 carbons and phenyl; R3 may be the same of different and is independently selected from the group consisting of alkoxy groups having 1 to 8 carbon atoms and cycloalkoxy groups with 5 to 8 carbon atoms; and R1 is selected from the group consisting of a substituted or unsubstituted alkylene group having a total of 1 to 18 carbon atoms and a substituted or unsubstituted arylene group having a total of 6 to 12 carbon atoms.
本发明涉及一种制备橡胶组合物的工艺,该工艺涉及在预混合步骤中将至少一种
硫磺硫化弹性体、微粒填料和式中的非对称有机二
硫化
硅化合物进行热机械混合。
其中 Z 选自以下组成的组
其中 R2 可以相同或不同,且独立地选自具有 1 至 4 个碳原子的烷基和苯基组成的 组;R3 可以相同或不同,且独立地选自具有 1 至 8 个碳原子的烷氧基和具有 5 至 8 个碳原子的环烷氧基组成的组;以及 R1 选自具有 1 至 18 个碳原子的取代或未取代亚烷基和具有 6 至 12 个碳原子的取代或未取代芳烯基组成的组。