Method for functionalising a stereo-regular polydiene
AssigneesCentre National De La Recherche Scientifique, Universite D'Artois, Universite De Lille, Ecole Centrale De Lille, Ecole Nationale Superieure De Chimie De Lille
InventorsMarc Visseaux, Philippe Zinck, Sébastien Georges, Yohan Champouret
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Abstract
Disclosed is a functionalizing method for the end functionalisation of trans-1,4 stereo-regular polydiene chains obtained by the coordination catalytic polymerisation of at least one conjugated diene monomer. It also relates to a polydiene having a trans-1,4 chain formation rate of at least 85%, preferably at least 90%, and an end functionalisation rate higher than 70%, preferably higher than 80%, and more preferably higher than 90%.
Claims19
A method for the end functionalisation of trans-1,4 stereo-regular polydiene chains obtained by coordination catalytic polymerisation of at least one conjugated diene monomer, wherein the said method comprises at least the following steps:
- a) providing a medium containing stereo-regular diene polymer chains formed in situ by means of coordination catalytic polymerisation of at least one conjugated diene monomer in the presence of a catalytic system that is effective in promoting trans-1,4 stereo-regular polymerisation of said monomer,
- b) introducing an excess amount of at least one metal transfer agent, brought in contact with said stereo-regular chains, and maintaining this contact under conditions conducive to the transfer thereof to said metal transfer agent, wherein the amount of the metal transfer agent is greater than the amount of polymerisation catalyst;
- and
- c) bringing the stereo-regular chains transferred to said metal transfer agent, into contact with at least one functionalising agent, and maintaining this contact under effective conditions conducive to the formation of a trans-1,4 stereo-regular diene polymer functionalised at least at one of its terminal ends,
- wherein the functionalised stereo-regular diene polymer obtained at the end of step c) has an end funtionalisation rate that is higher than 70%.
A polydiene having a trans-1,4 chain formation rate of at least 85%, and an end functionalisation rate that is higher than 70%.
Dependencies are inferred from the claim text.