Patent ID: 8492479
Filing Date: 2013-07-23
Classification: B60C,C08C,C08F,C08G,C08K,C08L

Abstract:
1. A process for preparing a diene block copolymer, of which at least one of said blocks is constituted of a diene elastomer and at least the other of said blocks is constituted of a polyether, wherein the process comprises a step of reacting a living diene elastomer with a functionalizing agent having a functional polyether block of number-average molecular weight from 150 to 5000 g/mol, represented by general formula I: in which: R m is an integer from 1 to 4; and A represents, identically or differently when m is greater than 1, the group of general formula II in which: R R R X represents, identically or differently when i is equal to 0 or 1, a group chosen from a halogen atom and a group of formula —OR n is a number greater than 1, so that the polyether block has a number-average molecular weight from 150 to 5000 g/mol; and i is an integer from 0 to 2.