Patent ID: 9624359
Date: 2017-04-18
CPC Classifications: C08C,C08L

Claim:
1. An elastomer composed: a) of a functionalized diene elastomer, at the chain end or in the middle of the chain, by a tin functional group, exhibiting a monomodal distribution of molecular weights before functionalization and a polydispersity index before functionalization of less than or equal to 1.3, b) of a star-branched diene elastomer being branched with a tin-comprising compound, exhibiting a monomodal distribution of molecular weights before star-branching and a polydispersity index before star-branching of less than or equal to 1.3, and c) of a content of less than 15% by weight, with respect to the total weight of the elastomer, of a non-tin-functional diene elastomer, wherein the diene elastomer a) before functionalization, the diene elastomer b) before star-branching, and the diene elastomer c) being the same in nature.