Modified polymers prepared with lanthanide-based catalysts

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

2006-01-31

2006-01-31

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...

C525S377000, C525S383000, C525S343000, C525S105000

Reexamination Certificate

active

06992147

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, and reacting the pseudo-living polymer with at least one functionalizing agent defined by the formula (I)where A is a substituent that will undergo an addition reaction with a pseudo-living polymer, R1is a divalent organic group, R2is a monovalent organic group, and each R4, which may be the same or different, is a monovalent organic group or a substituent defined by —OR5where R5is a monovalent organic group, with the proviso that A, R1, R2, R4, and R5are substituents that will not protonate a pseudo-living polymer. Also, the functionalized polymer and a vulcanizable composition containing the polymer.

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