Modified polymers prepared with lanthanide-based catalysts

Details Modified polymers prepared with lanthanide-based catalysts Modified polymers prepared with lanthanide-based catalysts

2005-12-20

2005-12-20

Choi, Ling-Sui (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S342000, C525S383000, C525S105000

Reexamination Certificate

active

06977281

ABSTRACT:
A method for preparing a functionalized polymer comprising the steps of preparing a pseudo-living polymer by polymerizing conjugated diene monomer with a lanthanide-based catalyst, where said pseudo-living polymer is characterized by having greater than about 85 percent of the polymer in the cis microstructure and less than about 3 percent of the polymer is in the 1,2- or 3,4-microstructure, and reacting the pseudo-living polymer with at least one functionalizing agent defined by the formula (I) or (II)where Z is a substituent that will react or interact with organic or inorganic fillers; R1is a single bond or a divalent organic group; R2is a monovalent organic group or a divalent organic group that forms a cyclic organic group with R13or R14; R3is a single bond, a divalent organic group, or a trivalent organic group that forms a cyclic organic group with R4or R5; R13is a single bond, a divalent organic group, or a trivalent organic group that forms a cyclic organic group with R2or R14; R4is a monovalent organic group or a divalent organic group that forms a cyclic organic group with R3or R5; R14is a monovalent organic group or a divalent organic group that forms a cyclic organic group with R2or R13; and R5is a monovalent organic group or a divalent organic group that forms a cyclic organic group with R3or R4; with the proviso that each group attached to the imino carbon is attached via a carbon atom and R1, R2, R3, R4, R5, R13, R14and Z are substituents that will not protonate a pseudo-living polymer.

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