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US 9,163,104 B2Granted
Preparation of functional polymers using phosphide initiators
AssigneeBridgestone Corporation
InventorsTerrence E. Hogan, William L. Hergenrother, David M. Roggeman
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Abstract
A method of preparing a polymer, the method comprising: metalating an organophosphine compound in the substantial absence of monomer to form a metalated organophosphine; and introducing the metalated organophosphine to monomer including conjugated diene monomer to form a reactive polymer.
Claims29
A method of preparing a polymer, the method comprising:
- i. metalating an organophosphine compound in the substantial absence of monomer and in the presence of an oxygen-containing polar coordinator to form a metalated organophosphine;
- and
- ii. introducing the metalated organophosphine to monomer including conjugated diene monomer to form a reactive polymer.
The method of 4, wherein the group I or group II metal is lithium.
A method of preparing a polymer, the method comprising:
- i. preparing an initiator having the formula R2PLi, where each R is independently a monovalent organic group, P is a phosphorus atom, and Li is a lithium atom attached directly to the phosphorus atom, where said step of preparing takes place in the substantial absence of monomer and in the presence of an oxygen-containing polar coordinator;
- and
- ii. polymerizing conjugated diene monomer by initiating the polymerization with the initiator.
Dependencies are inferred from the claim text.