RUBBER COMPOSITION COMPRISING NATURAL RUBBER CUTTING HAVING MOLECULAR MASS DISTRIBUTION, SECAMED VIEW, RESPECTIVELY UNIMODAL OR BIMODAL, PROCESS FOR PREPARATION AND PNEUMATIC COMPONENT

摘要

Rubber composition comprising a cut of natural rubbers having a molecular weight distribution, seen in SEC-MALS, respectively unimodal or bimodal, method of preparation and tire component The subject of the invention is a rubber composition based on at least an elastomeric matrix comprising natural rubber, a reinforcing filler, a crosslinking system, characterized in that said natural rubber is a blend of (i) a natural rubber having a molecular weight distribution, seen in SEC- MALS, bimodal and (ii) a natural rubber having a molecular weight distribution, seen in SEC-MALS, unimodal and having an index of initial plasticity, PO, less than 20, in mass proportions ranging from 90: 10 to 20: 80. It also relates to a method for preparing such a composition, a tire component comprising it and a tire comprising this component.