Process for producing polydienes
AssigneeBridgestone Corporation
InventorsKevin M. MCCAULEY, Steven LUO
Life of this patent
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Abstract
A method for producing a polydiene, the method comprising of combining a lanthanide compound, an alkylating agent, a halogen source, and optionally conjugated diene monomer to form an active preformed catalyst; independent of step (i), introducing an amine with conjugated diene monomer to be polymerized; independent of step (i), introducing the active preformed catalyst to the conjugated diene monomer to be polymerized to form an active polymerization mixture, where the active polymerization mixture includes less than 10% by weight, based on the total weight of the active polymerization mixture, of a solvent; and allowing the monomer to be polymerized to polymerize in the presence of the amine.
Claims20
A method for producing a polydiene, the method comprising:
- (i) combining a lanthanide compound, an alkylating agent, a halogen source, and optionally conjugated diene monomer to form an active preformed catalyst;
- (ii) independent of step (i), introducing an amine with conjugated diene monomer to be polymerized;
- (iii) independent of step (i), introducing the active preformed catalyst to the conjugated diene monomer to be polymerized to form an active polymerization mixture, where the active polymerization mixture includes less than 10% by weight, based on the total weight of the active polymerization mixture, of a solvent;
- and
- (iv) allowing the monomer to be polymerized to polymerize in the presence of the amine.
A method for producing a polydiene, the method comprising:
- (i) combining a lanthanide compound, an alkylating agent, a halogen source, and optionally conjugated diene monomer to form an active preformed catalyst;
- (ii) independent of step (i), introducing an amine with conjugated diene monomer to be polymerized;
- (iii) independent of step (i), introducing the active preformed catalyst to the conjugated diene monomer to be polymerized to form an active polymerization mixture;
- and
- (iv) allowing the monomer to be polymerized to polymerize in the presence of the amine, where the lanthanide compound is a lanthanide carboxylate, lanthanide organophosphate, lanthanide organophosphonate, lanthanide organophosphinate, lanthanide carbamate, lanthanide dithiocarbamate, lanthanide xanthate, lanthanide β-diketonate, lanthanide alkoxide or aryloxide, or organolanthanide compound.
Dependencies are inferred from the claim text.