Polyalkenyl Coupling Agent And Conjugated Diene Polymers Prepared Therefrom

摘要

A process is provided for preparing a coupled polymer by anionic polymerization wherein the coupled polymer is a conjugated diene polymer comprising the following reaction steps:
a) polymerizing a monomer or a mixture of monomers comprising at least one conjugated diene optionally one or more monoalkenyl arene compounds in the presence of an anionic initiator to form a living polymer arm or mixture of arms with an average apparent molecular weight greater than 2000;b) reacting the living polymer arm or arms with a polyalkenyl coupling agent;c) terminating the polymerization if any living polymers remain after step b); andd) optionally functionalizing and/or hydrogenating the coupled polymer so produced,

wherein the polyalkenyl coupling agent is an alpha,omega-bis(vinylphenyl)alkane. Also provided is the polymer so prepared and its use in concentrates, aqueous emulsions and products made from aqueous emulsions.

主权项

1. A process for preparing a coupled polymer by anionic polymerization wherein the coupled polymer is a conjugated diene polymer comprising the following reaction steps:
a) polymerizing a monomer or a mixture of monomers comprising at least one conjugated diene optionally one or more monoalkenyl arene compounds in the presence of an anionic initiator to form a living polymer arm or mixture of arms, with an average apparent molecular weight greater than 2000, measured with gel permeation chromatography (GPC) using polystyrene calibration standards, in accordance with ASTM D5296-11; b) reacting the living polymer arm or arms with a polyalkenyl coupling agent; c) terminating the polymerization if any living polymers remain after step b); and d) optionally functionalizing and/or hydrogenating the coupled polymer so produced, wherein the polyalkenyl coupling agent is an alpha,omega-bis(vinylphenyl)alkane.