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US 8,987,395 B2Granted
Bulk polymerization of conjugated dienes using a nickel-based catalyst system
AssigneeBridgestone Corporation
InventorsKevin M. McCauley, Steven Luo
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Abstract
A process for preparing a polydiene, the process comprising the step of polymerizing conjugated diene monomer with a nickel-based catalyst system, where said step of polymerizing takes place within a polymerization mixture that includes less than 20% by weight of organic solvent based on the total weight of the polymerization mixture, where the temperature of the polymerization mixture is maintained below 34° C. during said step of polymerizing, and where the conversion of the conjugated diene monomer is maintained below 30%.
Claims17
A process for preparing a polydiene, the process comprising the step of:
- polymerizing conjugated diene monomer with a nickel-based catalyst system, where said step of polymerizing takes place within a polymerization mixture that includes less than 20% by weight of organic solvent based on the total weight of the polymerization mixture, where the temperature of the polymerization mixture is maintained below 25° C. during said step of polymerizing, and where the conversion of the conjugated diene monomer is maintained below 12%.
Dependencies are inferred from the claim text.