US Patent No. 9,458,270

METHOD FOR PRODUCING POLYDIENES AND POLYDIENE COPOLYMERS WITH REDUCED COLD FLOW


Patent No. 9,458,270
Issue Date October 04, 2016
Title Method For Producing Polydienes And Polydiene Copolymers With Reduced Cold Flow
Inventorship Steven Luo, Copley, OH (US)
Assignee Bridgestone Corporation, Tokyo (JP)

Claim of US Patent No. 9,458,270

1. A method for preparing a coupled polymer, the method comprising the steps of:
(i) polymerizing monomers to form a reactive polymer, where the monomer includes conjugated diene monomer, where said step
of polymerizing employs a coordination catalyst, and where said reactive polymer has a reactive chain end, and

(ii) reacting the reactive polymer with a glycidic ester.