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US 8,785,566 B2Granted
Polymers functionalized with polycyano compounds
AssigneeBridgestone Corporation
InventorSteven Luo
Life of this patent
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Abstract
A method for preparing a functionalized polymer, the method comprising the steps of polymerizing monomer to form a reactive polymer, and reacting the reactive polymer with a polycyano compound.
Claims21
A method for preparing a functionalized polymer, the method comprising the steps of:
- (i) polymerizing monomer consisting of conjugated diene monomer with a lanthanide-based catalyst system to form a polymer having a reactive chain end and a cis-1,4-linkage content of at least 60%;
- and
- (ii) reacting the reactive chain end with a polycyano compound, where the polycyano compound is defined by the formula N≡C—R1—C≡N, where R1 is an acyclic divalent organic group that may or may not include one or more heteroatoms or R1 is a cyclic divalent organic group that is devoid of heteroatoms.
A method for preparing a functionalized polymer, the method comprising the steps of:
- (i) polymerizing monomer consisting of conjugated diene monomer with a lanthanide-based catalyst system to form a polymer having a pseudo-living chain end;
- and
- (ii) reacting the polymer having a pseudo-living chain end with a polycyano compound, where the polycyano compound is defined by the formula N≡C—R1—C≡N, where R1 is an acyclic divalent organic group that may or may not include one or more heteroatoms or R1 is a cyclic divalent organic group that is devoid of heteroatoms.
Dependencies are inferred from the claim text.