Polymerization Catalyst Composition And Method Of Employing Same
AssigneeBridgestone Corporation
InventorsZengquan Qin, James H. Pawlow, Christine M. Rademacher
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Abstract
The cis-1,4 mer content of conjugated diene mer in polymers can be increased by adding any of a class of morpholine compounds to a catalyst composition that includes a lanthanide metal atom.
Claims21
A catalyst composition useful for polymerizing polyenes, said composition comprising a compound that comprises a Group 3 metal atom, a catalyst activator, a compound that comprises a halogen atom, and morpholine or a substituted compound that comprises a functional group bonded to its ring N atom via a C or Si atom.
(canceled)
A process for providing a polymer from monomers that comprise at least one polyene, said process comprising contacting said monomers with a catalyst composition and allowing them to polymerize, wherein said catalyst composition comprises a compound that comprises a Group 3 metal atom, a catalyst activator, a compound that comprises a halogen atom, and morpholine or a substituted morpholine that comprises a functional group bonded to its ring N atom via a C or Si atom.
A method for increasing the cis-1,4 mer content of polymers that comprise conjugated diene mer, said method comprising adding morpholine or a substituted morpholine that comprises a functional group bonded to its ring N atom via a C or Si atom to a catalyst composition that comprises a compound that comprises a Group 3 metal atom, a catalyst activator, a compound that comprises a halogen atom and allowing the resulting composition to catalyze the polymerization of monomers that comprise at least one conjugated diene mer.
Dependencies are inferred from the claim text.