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US 9,868,805 B2Granted
Polydienes and diene copolymers having organophosphine functionality
AssigneeBridgestone Corporation
InventorsTerrence E. Hogan, William L. Hergenrother, David M. Roggeman
Life of this patent
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Abstract
Embodiments provide polydienes and diene copolymers having organophosphines functionality. Specific embodiments employ phosphorus-containing organometal initiators and copolymers prepared by anionically polymerizing conjugated diene monomer and vinyl organophosphine.
Claims10
A copolymer having one or more phosphorus-containing mer units defined by the formula VII:
- where R11 and R12 are each independently monovalent organic groups, or where R11 and R12 join to form a divalent organic group, and where R13, R14, and R15 are each independently hydrogen or monovalent organic groups, or where R13 and R14 join to form a divalent organic group, where the phosphorus-containing mer units are irregularly distributed or randomly distributed along the backbone of the copolymer among mer units derived from the polymerization of conjugated diene monomer, where the copolymer has a number average molecular weight of from about 1 to about 10,000 kg/mole, where the copolymer has a molecular weight distribution that is less than 2.
A copolymer having one or more phosphorus-containing mer units defined by the formula VIII:
- where R11 and R12 are each independently monovalent organic groups, or where R11 and R12 join to form a divalent organic group, and where R13, R14, and R15 are each independently hydrogen or monovalent organic groups, or where R13 and R14 join to form a divalent organic group, where the phosphorus-containing mer units are irregularly distributed or randomly distributed along the backbone of the copolymer among mer units derived from the polymerization of conjugated diene monomer, where the copolymer has a number average molecular weight of from about 1 to about 10,000 kg/mole, where the copolymer has a molecular weight distribution that is less than 2.
Dependencies are inferred from the claim text.