| abstract |
The invention relates to a process for the preparation of a sulfur-crosslinkable rubber mixture containing at least a diene rubber, a polar filler, a silane coupling agent and a highly crosslinked, polar group-surface-modified microgel based on a butadiene rubber. Further, the invention relates to a rubber composition prepared by the process and a tire whose tread is at least partially made of a sulfur vulcanized rubber composition.n n n For better tire properties, the admixture of the polar filler, the silane coupling agent and the surface-modified microgel with polar groups occurs simultaneously in the mixing process. |