Polydienes and diene copolymers using 1,1-bis(hydrocarbylthio)hydrocarbyl-1-ene compounds
AssigneeBridgestone Corporation
InventorTerrence E. Hogan
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Abstract
A process for preparing a copolymer including one or more mer units deriving from the polymerization of 1,1-bis(hydrocarbylthio)hydrocarbyl-1-ene monomer, the process comprising anionically polymerizing conjugated diene monomer, 1,1-bis(hydrocarbylthio)hydrocarbyl-1-ene monomer, and optionally monomer copolymerizable therewith.
Claims21
A process for preparing a copolymer including one or more mer units deriving from the polymerization of 1,1-bis(hydrocarbylthio)hydrocarbyl-1-ene monomer, the process comprising:
- anionically polymerizing conjugated diene monomer, and optionally monomer copolymerizable therewith, to provide a living polymer capable of reacting with additional monomer,
- further extending the living polymer by anionically polymerizing 1,1-bis(hydrocarbylthio)hydrocarbyl-1-ene monomer, optionally together with conjugated diene monomer, and monomer copolymerizable therewith, to provide a functional living copolymer having one or more mer units defined by the formula VI
- where R11 and R12 are each independently a hydrogen atom or a monovalent organic group, or where R11 and R12 join to form a divalent organic group, and where R13 and R14 are each independently a hydrogen atom or a monovalent organic group, or where R13 and R14 join to form a divalent organic group.
A process for preparing a copolymer including one or more mer units deriving from the polymerization of 1,1-bis(hydrocarbylthio)hydrocarbyl-1-ene monomer, the process comprising:
- anionically polymerizing conjugated diene monomer, 1,1-bis(hydrocarbylthio)hydrocarbyl-1-ene monomer, and optionally monomer copolymerizable therewith, where said step of anionically polymerizing includes charging a polymerization initiator to a reactor and subsequently charging conjugated diene monomer and optionally vinyl aromatic monomer to the reactor, and then subsequently charging the 1,1-bis(hydrocarbylthio)hydrocarbyl-1-ene monomer to the reactor, where said step of charging the 1,1-bis(hydrocarbylthio)hydrocarbyl-1-ene monomer to the reactor takes place after substantial completion of the polymerization of the conjugated diene monomer and optional vinyl aromatic monomer.
A method for preparing a functionalized polymer, the method comprising:
- polymerizing conjugated diene monomer with 1,1-bis(hydrocarbylthio)hydrocarbyl-1-ene monomer, optionally together with comonomer, using a 1,1-bis(hydrocarbylthio)hydrocarbyl-1-ene organometal initiator.
A method for preparing a polymer, the method comprising:
- i. preparing an initiator by reacting a 1,1-bis(hydrocarbylthio)hydrocarbyl-1-ene compound with an organometal compound,
- where the 1,1-bis(hydrocarbylthio) hydrocarbyl-1-ene compound is defined by the formula I:
- where R1 and R2 are each independently a hydrogen atom or a monovalent organic group, or where R1 and R2 join to form a divalent organic group, and where R3 and R4 are each independently a monovalent organic group;
- ii. chain extending the initiator by initiating the polymerization of from 3 to 25 units of 1,3-butadiene with the initiator to form a stabilized chain extended initiator;
- and
- iii. polymerizing additional 1,3-butadiene, optionally together with comonomer, by initiating the polymerization of the additional 1,3-butadiene with the stabilized chain extended initiator.
A method for preparing a polymer, the method comprising,
- i. preparing an initiator by reacting a 1,1-bis(hydrocarbylthio)hydrocarbyl-1-ene compound with an organometal compound;
- and
- ii. polymerizing conjugated diene monomer, optionally together with comonomer, by initiating the polymerization of the monomer with the initiator;
- where the 1,1-bis(hydrocarbylthio)hydrocarbyl-1-ene compound is defined by the formula I:
- where R1 and R2 are each independently a hydrogen atom or a monovalent organic group, or where R1 and R2 join to form a divalent organic group, and where R3 and R4 are each independently a monovalent organic group.
Dependencies are inferred from the claim text.