Patent ID: 8344063
Filing Date: 2013-01-01
Classification: B60C,C08C,C08F,C08K,C08L

Abstract:
1. Coupled diene elastomer having a silanol functional group, wherein it comprises a silanol functional group in the middle of the chain, an overall level of Si functional group L (which is the ratio N s /N p , in which N s represents the number of moles of silicon bonded to the coupled polymer, determined by 1 H nuclear magnetic resonance NMR and expressed in mmol/kg, and N p represents the number of mmoles of polymer before coupling per kilogram of polymer) ranging from 0.36 to 0.60, a level of silanol functional group (SiOH) in the middle of the chain L1, which is the ratio corresponding to the number of moles of SiOH functional groups to the number of moles of silicon (Si), determined by 2D 1 H- 29 Si nuclear magnetic resonance NMR, ranging from 80 to 100% and a monomodal distribution of the number-average molecular weights of the coupled polymer chains.